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Delatouche L, Tixier P, Sainte-Rose J, Daribo MO, de Lapeyre de Bellaire L. How do hedgerow characteristics alter the dispersal of Pseudocercospora fijiensis propagules? Pest Manag Sci 2024; 80:1454-1464. [PMID: 37943106 DOI: 10.1002/ps.7876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/18/2023] [Accepted: 11/09/2023] [Indexed: 11/10/2023]
Abstract
BACKGROUND Hedgerows represent an agroecological lever for pest management. To date, few studies have shown that they can be used as a lever for the control of aerial fungal diseases, especially as a barrier to dispersal. On banana production, the main disease is black leaf streak disease (BLSD), which is a fungal disease caused by Pseudocercospora fijiensis. This pathogen disperses through two types of spores: ascospore and conidia. The aim of this study was to observe and to quantify the effect of hedgerows on BLSD dispersal. Trap plants were placed at the same distance to an artificial source of inoculum with a hedgerow on one side. Lesions were counted to establish the daily lesion density of each trap plant. The combination of hedgerow characteristics such as height, width, and optical porosity were used to evaluate its potential capacity to intercept spores. RESULTS When ascospores were used as a source of inoculum, the lesion density on traps plant decreased up to 50% between the hedgerow with the lowest interception capacities and the one with the highest interception capacities. For conidia, hedgerow height and side of the trap plants (with or without hedgerow between them and the source) were not significant, but low porosity of the hedgerow reduced the lesion density. On the contrary, for ascospore, the hedgerow effect was anisotropic; the trap plants on hedgerow side had less lesions. CONCLUSION Our study is the first experimental proof of the effect of hedgerows on P. fijiensis dispersion, both on conidia and ascospore. We showed that hedgerow characteristics impact the capacity of interception of the hedgerow. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Lucile Delatouche
- CIRAD, UPR GECO, Le Lamentin, France
- CIRAD, UPR GECO, Montpellier, France
- GECO, Univ Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR AIDA, Montpellier, France
- AIDA, Univ Montpellier, CIRAD, Montpellier, France
| | - Philippe Tixier
- CIRAD, UPR GECO, Montpellier, France
- GECO, Univ Montpellier, CIRAD, Montpellier, France
- UPR GECO, CIRAD, Vientiane, Lao People's Democratic Republic
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Delaplace A, Coulis M, Chapillon L, Cottin G, Tixier P. Stop me if you can: quantification of the effect of interfaces between plots on the dispersal of Cosmopolites sordidus. Pest Manag Sci 2023; 79:5106-5115. [PMID: 37565376 DOI: 10.1002/ps.7710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 08/04/2023] [Accepted: 08/10/2023] [Indexed: 08/12/2023]
Abstract
BACKGROUND Cosmopolites sordidus is one of the most damaging pests of banana worldwide. To date, most studies have addressed the control of this pest at the plot level, without considering the landscape scale, whereas between plots dispersion could be important. The aim of this study was to investigate the ability of C. sordidus to cross contrasted field interfaces. The 10 following interfaces were investigated: forests, hedgerows, field tracks, grassy areas, finely and coarsely tilled soil zones, ditches with and without water, vegetable gardening zones, and pheromone trap lines. Individually marked weevils were released on one side of the interface and recovered daily on the other side, allowing the estimation of the velocity and the crossing success of C. sordidus for each interface. RESULTS Highest permeabilities (with a crossing success above 70%) were obtained for vegetable gardening zones, finely tilled soil zones, forests, and coarsely tilled soil zones. Intermediate permeabilities were measured for hedgerows, field tracks, grassy areas, and ditches without water. Only the line of pheromone traps and submerged ditches had a strong barrier effect on C. sordidus, with a crossing success below 12%. Wind strength, percentage of sky, and vegetation height were negatively correlated to the C. sordidus crossing success. CONCLUSION Overall, our results showed that only ditches with water and lines of pheromone traps were efficient in stopping the dispersal of C. sordidus. The next step will be to conduct research to incorporate the use of these two interfaces at farm and landscape scale into integrated pest management strategies. © 2023 Society of Chemical Industry.
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Affiliation(s)
- Alexis Delaplace
- CIRAD, UPR GECO, Le Lamentin, France
- GECO, Univ Montpellier, CIRAD, Montpellier, France
- Presta'SCIC, Fort-de-France, France
| | - Mathieu Coulis
- CIRAD, UPR GECO, Le Lamentin, France
- GECO, Univ Montpellier, CIRAD, Montpellier, France
| | - Laure Chapillon
- CIRAD, UPR GECO, Le Lamentin, France
- GECO, Univ Montpellier, CIRAD, Montpellier, France
| | | | - Philippe Tixier
- GECO, Univ Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR GECO, Montpellier, France
- UPR GECO, CIRAD, Vientiane, Lao People's Democratic Republic
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Delatouche L, de Lapeyre de Bellaire L, Tixier P. Disentangling the Factors Affecting the Dynamic of Pseudocercospora fijiensis: Quantification of Weather, Fungicide, and Landscape Effects. Phytopathology 2023; 113:31-43. [PMID: 35939624 DOI: 10.1094/phyto-04-22-0132-r] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Quantifying the effect of landscape composition on disease dynamics remains challenging because it depends on many factors. In this study, we used a hybrid process-based/statistical modeling approach to separate the effect of the landscape composition on the epidemiology of banana leaf streak disease (BLSD) from weather and fungicide effects. We parameterized our model with a 5-year dataset, including weekly measures of BLSD on 83 plots in Martinique. After estimating the intrinsic growth parameters of the stage evolution of the disease (SED), we evaluated the dynamic effect of five fungicides. Then, we added the intra- and inter-annual effect on disease dynamics using a generalized linear model. Finally, the whole model was used to assess the annual effect of the landscape on the SED for 11 plots. We evaluated the significance of the landscape composition (proportions of landscape elements in 200-, 500-, 800-, 1,000-m-radius buffer zones) on the landscape effect evaluated with the model. The percentage of hedgerows in a 200-m-radius buffer zone was negatively correlated to the landscape effect, i.e., it acted as a constraint against BLSD spreading and development. The proportion of managed-banana-plants in a 1,000-m-radius buffer zone was negatively correlated to the landscape effect, probably due to a mass effect of fungicide treatments. Inversely, the proportions of forest and the proportion of unmanaged-banana-plants, both in 1,000-m-radius buffer zones, were positively correlated with the landscape effect. Our study provides a holistic approach of the role biotic and abiotic factors play on the dynamics of BLSD.
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Affiliation(s)
- Lucile Delatouche
- CIRAD, UPR GECO, F-97285 Le Lamentin, Martinique, France
- CIRAD, UPR GECO, F-34398 Montpellier, France
- GECO, University of Montpellier, CIRAD, Montpellier, France
| | | | - Philippe Tixier
- CIRAD, UPR GECO, F-34398 Montpellier, France
- GECO, University of Montpellier, CIRAD, Montpellier, France
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Tresson P, Tixier P, Puech W, Abufera B, Wyvekens A, Carval D. Caught on camera: Field imagery reveals the unexpected importance of vertebrates for biological control of the banana weevil (Cosmopolites sordidus Col. Curculionidae). PLoS One 2022; 17:e0274223. [PMID: 36125985 PMCID: PMC9488773 DOI: 10.1371/journal.pone.0274223] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Accepted: 08/23/2022] [Indexed: 11/18/2022] Open
Abstract
Understanding of ecological interactions is necessary for the application of biological control. Banana is the second most produced fruit worldwide and the banana weevil (Cosmopolites sordidus) is the most important pest of banana and plantain. Its biological control remains challenging because of the robustness and cryptic behaviour of the adult and the hidden development of larval stages. Researchers therefore tend to favour conservation biological control of this pest. The commonly used methods for measuring the effects of natural enemies on the regulation of this pest focus on invertebrates and may underestimate the role of vertebrates on biological control. Using cameras, we recorded the predation of sentinel adult weevils in banana plots in La Réunion island that differed in weevil infestation levels and in animal biodiversity. To facilitate image analysis, we used background subtraction to isolate moving parts of image sequences and thus detect predators and predation events. Our cameras recorded only vertebrates as predators of adult banana weevils. The most important predator appeared to be the Asian shrew (Suncus murinus), which was responsible for 67% of the predation events. Other predators included the house mouse (Mus musculus), the oriental garden lizard (Calotes versicolor), and the guttural toad (Sclerophrys gutturalis). The exact time of predation events were determined from the images metadata. It was thus possible to identify predator foraging periods that coincided with activity of adult weevils. Our results confirm that images provide useful information for biological and ecological studies. Along with other recent studies, our results suggest that the role of vertebrates in biological control may be underestimated. Based on these results, we advocate for several management implications such as the installation of hedges, grasslands, and ponds to favour these vertebrate predators of the banana weevil, possibly also favouring other vertebrate and invertebrate natural enemies.
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Affiliation(s)
- Paul Tresson
- CIRAD, UPR GECO, Montpellier, France
- GECO, Univ Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR GECO, Saint-Pierre, France
- LIRMM, Université de Montpellier, CNRS, Montpellier, France
- * E-mail:
| | - Philippe Tixier
- CIRAD, UPR GECO, Montpellier, France
- GECO, Univ Montpellier, CIRAD, Montpellier, France
| | - William Puech
- LIRMM, Université de Montpellier, CNRS, Montpellier, France
| | - Bernard Abufera
- GECO, Univ Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR GECO, Saint-Pierre, France
| | - Antoine Wyvekens
- GECO, Univ Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR GECO, Saint-Pierre, France
| | - Dominique Carval
- CIRAD, UPR GECO, Montpellier, France
- GECO, Univ Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR GECO, Saint-Pierre, France
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Collard B, Tixier P, Carval D, Lavigne C, Delattre T. Assessing the effect of complex ground types on ground-dwelling arthropod movements with video monitoring: Dealing with concealed movements under a layer of plant residues. Ecol Evol 2022; 12:ECE39072. [PMID: 35845381 PMCID: PMC9271991 DOI: 10.1002/ece3.9072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Revised: 06/03/2022] [Accepted: 06/08/2022] [Indexed: 11/07/2022] Open
Abstract
Understanding the effect of ground types on foraging movements of ground-dwelling arthropods is a key step to managing their spatial distribution as required for successful conservation biological control. Indeed, fine movements at the centimeter scale can strongly influence the foraging ability of pest predators. However, because radio frequency identification or harmonic tracking techniques are not yet suitable for small species and video tracking focuses on uniform and light backgrounds, foraging movements have rarely been studied in relation to ground types. We present a method to track a ground-dwelling arthropod (the earwig Euborellia caraibea) at night, walking on two contrasted ground types: bare soil and soil partly covered with a stratum of banana plant residues allowing individuals to hide periodically. The tracking of individuals within these ground types was achieved by infrared light, tagging individuals, video treatments, and semi-automatic cleaning of trajectories. We tested different procedures to obtain segments with identical durations to quantify speeds and sinuosities. These procedures were characterized by the junction time gap between trajectory fragments, the rediscretization time of trajectories, and whether or not to use interpolation to fill in missing points in the trajectories. Earwigs exhibited significantly slower and more sinuous movements on soil with banana plant residues than on bare soil. Long time gaps for trajectory junction, extended rediscretization times, and interpolation were complementary means to integrate concealed movements in the trajectories. The highest slowdown in plant residues was detected when the procedure could account for longer periods under the residues. These results suggest that earwigs spent a significant amount of time concealed by the residues. Additionally, the residues strongly decreased the earwigs' movement. Since the technical solutions presented in this study are inexpensive, easy to set up, and replicate, they represent valuable contributions to the emerging field of video monitoring.
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Affiliation(s)
- Blanche Collard
- INRAEAvignonFrance
- CIRAD, UPR GECOMontpellierFrance
- GECO, Univ Montpellier, CIRADMontpellierFrance
| | - Philippe Tixier
- CIRAD, UPR GECOMontpellierFrance
- GECO, Univ Montpellier, CIRADMontpellierFrance
| | - Dominique Carval
- CIRAD, UPR GECOMontpellierFrance
- GECO, Univ Montpellier, CIRADMontpellierFrance
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Sauvadet M, Trap J, Damour G, Plassard C, Van den Meersche K, Achard R, Allinne C, Autfray P, Bertrand I, Blanchart E, Deberdt P, Enock S, Essobo JD, Freschet GT, Hedde M, de Melo Virginio Filho E, Rabary B, Rakotoarivelo M, Randriamanantsoa R, Rhino B, Ripoche A, Rosalie E, Saj S, Becquer T, Tixier P, Harmand JM. Agroecosystem diversification with legumes or non-legumes improves differently soil fertility according to soil type. Sci Total Environ 2021; 795:148934. [PMID: 34328927 DOI: 10.1016/j.scitotenv.2021.148934] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 06/03/2021] [Accepted: 07/05/2021] [Indexed: 05/23/2023]
Abstract
Plant diversification through crop rotation or agroforestry is a promising way to improve sustainability of agroecosystems. Nonetheless, criteria to select the most suitable plant communities for agroecosystems diversification facing contrasting environmental constraints need to be refined. Here, we compared the impacts of 24 different plant communities on soil fertility across six tropical agroecosystems: either on highly weathered Ferralsols, with strong P limitation, or on partially weathered soils derived from volcanic material, with major N limitation. In each agroecosystem, we tested several plant communities for diversification, as compared to a matching low diversity management for their cropping system. Plant residue restitution, N, P and lignin contents were measured for each plant community. In parallel, the soil under each community was analyzed for organic C and N, inorganic N, Olsen P, soil pH and nematode community composition. Soil potential fertility was assessed with plant bioassays under greenhouse controlled climatic conditions. Overall, plant diversification had a positive effect on soil fertility across all sites, with contrasting effects depending on soil type and legumes presence in the community. Communities with legumes improved soil fertility indicators of volcanic soils, which was demonstrated through significantly higher plant biomass production in the bioassays (+18%) and soil inorganic N (+26%) compared to the low diversity management. Contrastingly, communities without legumes were the most beneficial in Ferralsols, with increases in plant biomass production in the bioassays (+39%), soil Olsen P (+46%), soil C (+26%), and pH (+5%). Piecewise structural equation models with Shipley's test revealed that plant diversification impacts on volcanic soil fertility were related to soil N availability, driven by litter N. Meanwhile, Ferralsols fertility was related to soil P availability, driven by litter P. These findings underline the importance of multifactorial and multi-sites experiments to inform trait-based frameworks used in designing optimal plant diversification in agroecological systems.
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Affiliation(s)
- Marie Sauvadet
- Eco&Sols, Institut Agro, Univ Montpellier, CIRAD, INRAE, IRD, F-34060 Montpellier, France; Univ Montpellier, F-34398 Montpellier, France; CIRAD, UPR GECO, F-34398 Montpellier, France.
| | - Jean Trap
- Eco&Sols, Institut Agro, Univ Montpellier, CIRAD, INRAE, IRD, F-34060 Montpellier, France
| | - Gaëlle Damour
- Univ Montpellier, F-34398 Montpellier, France; CIRAD, UPR GECO, F-34398 Montpellier, France
| | - Claude Plassard
- Eco&Sols, Institut Agro, Univ Montpellier, CIRAD, INRAE, IRD, F-34060 Montpellier, France
| | - Karel Van den Meersche
- Univ Montpellier, F-34398 Montpellier, France; CIRAD, UMR Eco&Sols, F-34398 Montpellier, France; CATIE (Tropical Agricultural Research and Higher Education Center), Turrialba 7170, Costa Rica
| | - Raphaël Achard
- Univ Montpellier, F-34398 Montpellier, France; CIRAD, UPR GECO, F-34398 Montpellier, France; CIRAD, UPR GECO, F-97285 Le Lamentin, Martinique, France
| | - Clémentine Allinne
- Univ Montpellier, F-34398 Montpellier, France; CATIE (Tropical Agricultural Research and Higher Education Center), Turrialba 7170, Costa Rica; SYSTEM, Univ Montpellier, CIHEAM-IAMM, CIRAD, INRAE, Institut Agro, F-34060 Montpellier, France
| | - Patrice Autfray
- Univ Montpellier, F-34398 Montpellier, France; CIRAD, UPR AIDA, BP 110 Antsirabe, Madagascar; FOFIFA SRR, BP 230 Antsirabe, Madagascar
| | - Isabelle Bertrand
- Eco&Sols, Institut Agro, Univ Montpellier, CIRAD, INRAE, IRD, F-34060 Montpellier, France
| | - Eric Blanchart
- Eco&Sols, Institut Agro, Univ Montpellier, CIRAD, INRAE, IRD, F-34060 Montpellier, France
| | - Péninna Deberdt
- Univ Montpellier, F-34398 Montpellier, France; CIRAD, UPR HORTSYS, F-97285 Le Lamentin, France
| | - Séguy Enock
- ICRAF (World Agroforestry), West and Central Africa Regional Program, Yaounde, Cameroon
| | - Jean-Daniel Essobo
- ICRAF (World Agroforestry), West and Central Africa Regional Program, Yaounde, Cameroon
| | - Grégoire T Freschet
- CNRS, Station d'Ecologie Théorique et Expérimentale, F-09200 Moulis, France; CEFE, Univ Montpellier, CNRS, EPHE, IRD, Univ Paul Valéry Montpellier 3, Institut Agro, INRAE, F-34293 Montpellier, France
| | - Mickaël Hedde
- Eco&Sols, Institut Agro, Univ Montpellier, CIRAD, INRAE, IRD, F-34060 Montpellier, France
| | | | | | - Miora Rakotoarivelo
- Université d'Antananarivo, Ecole Supérieure des Sciences Agronomiques, BP 175 Antananarivo, Madagascar
| | | | - Béatrice Rhino
- Univ Montpellier, F-34398 Montpellier, France; CIRAD, UPR HORTSYS, F-97285 Le Lamentin, France
| | - Aude Ripoche
- Univ Montpellier, F-34398 Montpellier, France; CIRAD, UPR AIDA, BP 110 Antsirabe, Madagascar; FOFIFA SRR, BP 230 Antsirabe, Madagascar
| | - Elisabeth Rosalie
- Univ Montpellier, F-34398 Montpellier, France; CIRAD, UPR GECO, F-34398 Montpellier, France; CIRAD, UPR GECO, F-97285 Le Lamentin, Martinique, France
| | - Stéphane Saj
- Univ Montpellier, F-34398 Montpellier, France; SYSTEM, Univ Montpellier, CIHEAM-IAMM, CIRAD, INRAE, Institut Agro, F-34060 Montpellier, France; ICRAF (World Agroforestry), West and Central Africa Regional Program, Yaounde, Cameroon
| | - Thierry Becquer
- Eco&Sols, Institut Agro, Univ Montpellier, CIRAD, INRAE, IRD, F-34060 Montpellier, France
| | - Philippe Tixier
- Univ Montpellier, F-34398 Montpellier, France; CIRAD, UPR GECO, F-34398 Montpellier, France
| | - Jean-Michel Harmand
- Univ Montpellier, F-34398 Montpellier, France; CIRAD, UMR Eco&Sols, F-34398 Montpellier, France; ICRAF (World Agroforestry), West and Central Africa Regional Program, Yaounde, Cameroon
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Guillen Sánchez C, Tixier P, Tapia Fernández A, Conejo Barboza AM, Sandoval Fernández JA, de Lapeyre de Bellaire L. Can the banana weevil Cosmopolites sordidus be a vector of Fusarium oxysporum f.sp. cubense race 1? Unravelling the internal and external acquisition of effective inoculum. Pest Manag Sci 2021; 77:3002-3012. [PMID: 33624412 DOI: 10.1002/ps.6339] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 02/13/2021] [Accepted: 02/24/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND With the undergoing world outbreak of Fusarium wilt of bananas, it is essential to unravel all the possible process of dissemination of this disease. The host-pest interactions of the banana weevil with banana plants make this insect an important potential vector. This study, carried out in controlled conditions, explores the interaction between the banana weevil and Fusarium oxysporum f.sp. cubense race 1 (Foc), with a focus on the external and internal transport of viable fungal propagules. RESULTS Viable inoculum of Foc was detected very rapidly on external teguments and in the digestive tract of the insect, i.e. at the lowest time studied of 5 min after contact with infected pseudostems. Maximal inoculum acquisition occurred after 1 h contact with an inoculum source. External inoculum was higher than the inoculum present in the digestive tract, but external and internal inoculum had the same dynamics. After a contact of an infected source, external and internal inoculum decreased exponentially within 50 h, but weevils remained infested for a long time, as long as 2 or 3 days that would be enough for inoculum dispersal. Viable inoculum was also detected in feces. Foc strains isolated were pathogenic when inoculated to banana plants of the Gros Michel variety but did not provoke any symptom on Cavendish banana plants. CONCLUSION These results demonstrate that the infective structures of Foc remain externally viable in the digestive system and the excreta of the banana weevil. Such excreta are capable of making healthy banana plants of the Gros Michel variety. © 2021 Society of Chemical Industry.
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Affiliation(s)
- César Guillen Sánchez
- Dirección de Investigaciones, Corbana, Guápiles, Costa Rica
- GECO, Univ Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR GECO, Montpellier, France
| | - Philippe Tixier
- GECO, Univ Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR GECO, Montpellier, France
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Poggi S, Vinatier F, Hannachi M, Sanz Sanz E, Rudi G, Zamberletti P, Tixier P, Papaïx J. How can models foster the transition towards future agricultural landscapes? ADV ECOL RES 2021. [DOI: 10.1016/bs.aecr.2020.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Sauvadet M, Saj S, Freschet GT, Essobo J, Enock S, Becquer T, Tixier P, Harmand J. Cocoa agroforest multifunctionality and soil fertility explained by shade tree litter traits. J Appl Ecol 2020. [DOI: 10.1111/1365-2664.13560] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marie Sauvadet
- Eco&SolsUniv MontpellierIRDINRACIRADMontpellier SupAgro Montpellier France
| | - Stéphane Saj
- SystemUniv MontpellierCIRADINRAMontpellier SupAgro Kourou France
- CIRADUMR System Montpellier France
| | - Grégoire T. Freschet
- Centre d'Ecologie Fonctionnelle et Evolutive CNRSUniversité de MontpellierUniversité Paul Valéry MontpellierEPHEIRD Montpellier France
- Theoretical and Experimental Ecology Station CNRSPaul Sabatier University Moulis France
| | - Jean‐Daniel Essobo
- West and Central Africa Regional Program World Agroforestry (ICRAF) Yaounde Cameroon
| | - Séguy Enock
- West and Central Africa Regional Program World Agroforestry (ICRAF) Yaounde Cameroon
| | - Thierry Becquer
- Eco&SolsUniv MontpellierIRDINRACIRADMontpellier SupAgro Montpellier France
| | - Philippe Tixier
- GECOUniv MontpellierCIRAD Montpellier France
- CIRADUPR GECO Montpellier France
| | - Jean‐Michel Harmand
- Eco&SolsUniv MontpellierIRDINRACIRADMontpellier SupAgro Montpellier France
- West and Central Africa Regional Program World Agroforestry (ICRAF) Yaounde Cameroon
- CIRADUMR Eco&Sols Yaoundé Cameroun
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Merle I, Pico J, Granados E, Boudrot A, Tixier P, Virginio Filho EDM, Cilas C, Avelino J. Unraveling the Complexity of Coffee Leaf Rust Behavior and Development in Different Coffea arabica Agroecosystems. Phytopathology 2020; 110:418-427. [PMID: 31502519 DOI: 10.1094/phyto-03-19-0094-r] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Crop health management systems can be designed according to practices that help to reduce crop losses by restricting pathogen development and promoting host plant growth. A good understanding of pathogen and host dynamics, which are interdependent, is therefore needed. In this article, we used a holistic approach to explain the behavior of coffee leaf rust (CLR), a major coffee disease. We monitored coffee plant and CLR dynamics simultaneously in plots under different disease management and agroforestry systems. Diseased leaves were also collected to characterize inoculum stock and rust life stages (latent rust area, area with uredospores, necrosis due to rust) through picture analysis. We used structural equation modeling to obtain an overview of CLR pathosystem functioning on a plant scale. This overview integrates processes such as disease dilution by host leaf renewal, direct and indirect effects of fruit load on CLR development, antagonistic effects of shading depending on rust life stages, the tonic effect of copper-based fungicides on leaf retention, and effects on rust life stages depending on fungicide types. From our results, we also deduced that the inoculum stock could be calculated in unsprayed plots from the rust area with uredospores, with uredospores at 58 × 103 cm-2, on average.
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Affiliation(s)
- Isabelle Merle
- Bioagresseurs, Université de Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR Bioagresseurs, 30501 Turrialba, Costa Rica
| | - Jimmy Pico
- INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador
- CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica
| | - Eduardo Granados
- Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica
| | - Audrey Boudrot
- Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes, France
| | - Philippe Tixier
- CIRAD, UPR GECO, F-34398 Montpellier, France, and GECO, Université de Montpellier, CIRAD, Montpellier, France
| | | | - Christian Cilas
- Bioagresseurs, Université de Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR Bioagresseurs, F-34398 Montpellier, France
| | - Jacques Avelino
- Bioagresseurs, Université de Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR Bioagresseurs, 30501 Turrialba, Costa Rica
- CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica
- IICA AP. 55, 2200 Coronado, San Jose, Costa Rica
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11
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Dassou AG, Vodouhè SD, Bokonon-Ganta A, Goergen G, Chailleux A, Dansi A, Carval D, Tixier P. Associated cultivated plants in tomato cropping systems structure arthropod communities and increase the Helicoverpa armigera regulation. Bull Entomol Res 2019; 109:733-740. [PMID: 30968787 DOI: 10.1017/s0007485319000117] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Cultivating plant mixtures is expected to provide a higher productivity and a better control of pests and diseases. The structure of the arthropod community is a major driver of the magnitude of natural pest regulations.With the aim of optimizing pest management, a study was carried out to determine the effect of the cropping system type (tomato mono-cropping vs. mixed-cropping) on the diversity and abundance of arthropods from three trophic groups (herbivores, omnivores, predators) and the abundance of Helicoverpa armigera. Therefore, the diversity of cultivated plants and arthropod communities was assessed within tomato fields from 30 farmer's fields randomly selected in South of Benin. Results showed that the arthropod abundance was significantly higher in mixed-cropping systems compared with mono-cropping systems, although the crop type did not alter significantly the arthropod diversity, evenness, and richness. At the level of taxa, the abundances of generalist predators including ants (Pheidole spp., and Paltothyreus tarsatus) and spiders (Araneus spp. and Erigone sp.) were significantly higher in mixed fields than in mono-crop fields. Then, the abundances of omnivore-predator trophic groups have a negative significant effect on the H. armigera abundance. This study allowed better understanding of how plant diversity associated to tomato fields structures arthropod's food webs to finally enhance the ecological management of H. armigera.
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Affiliation(s)
- A G Dassou
- Laboratory of Biotechnology, Genetic Resources and Plant and Animal Breeding (BIORAVE); Faculty of Sciences and Technology; BP 14 Dassa; UNSTIM, Benin
| | - S D Vodouhè
- Department of Economics, Socio-Anthropology and Communication for Rural Development (DESAC), Faculty of Agronomic Sciences (FSA), UAC, Cotonou, Benin
| | - A Bokonon-Ganta
- Department of Plant Production (DPV), Faculty of Agronomic Sciences (FSA), University of Abomey-Calavi (UAC), 01 BP 526 RC, Cotonou, Benin
| | - G Goergen
- International Institute of Tropical Agriculture (Benin Station), 08 BP 0932 Tri Postal, Cotonou, Benin
| | - A Chailleux
- Biopass, Cirad-ISRA-UCAD-IRD, Dakar, Senegal
- CIRAD, UPR Hortsys, 18524 Dakar, Sénégal
- GECO, Univ Montpellier, CIRAD, Montpellier, France
| | - A Dansi
- Laboratory of Biotechnology, Genetic Resources and Plant and Animal Breeding (BIORAVE); Faculty of Sciences and Technology; BP 14 Dassa; UNSTIM, Benin
| | - D Carval
- GECO, Univ Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR GECO, F-34398 Montpellier, France
| | - P Tixier
- GECO, Univ Montpellier, CIRAD, Montpellier, France
- CIRAD, UPR GECO, F-34398 Montpellier, France
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12
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Tresson P, Tixier P, Puech W, Bagny Beilhe L, Roudine S, Pagès C, Carval D. CORIGAN: Assessing multiple species and interactions within images. Methods Ecol Evol 2019. [DOI: 10.1111/2041-210x.13281] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Paul Tresson
- CIRAD, UR GECO Montpellier France
- GECO, Univ Montpellier, CIRAD Montpellier France
- LIRMM, Univ Montpellier, CNRS Montpellier France
| | - Philippe Tixier
- CIRAD, UR GECO Montpellier France
- GECO, Univ Montpellier, CIRAD Montpellier France
| | | | - Leïla Bagny Beilhe
- CIRAD, UR Bioagresseurs Montpellier France
- Bioagresseurs, Univ Montpellier, CIRAD Montpellier France
| | - Sacha Roudine
- CIRAD, UR Bioagresseurs Montpellier France
- Bioagresseurs, Univ Montpellier, CIRAD Montpellier France
| | - Christine Pagès
- CIRAD, UR Bioagresseurs Montpellier France
- Bioagresseurs, Univ Montpellier, CIRAD Montpellier France
| | - Dominique Carval
- CIRAD, UR GECO Montpellier France
- GECO, Univ Montpellier, CIRAD Montpellier France
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13
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Sauvadet M, den Meersche KV, Allinne C, Gay F, de Melo Virginio Filho E, Chauvat M, Becquer T, Tixier P, Harmand JM. Shade trees have higher impact on soil nutrient availability and food web in organic than conventional coffee agroforestry. Sci Total Environ 2019; 649:1065-1074. [PMID: 30308878 DOI: 10.1016/j.scitotenv.2018.08.291] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 08/21/2018] [Accepted: 08/21/2018] [Indexed: 06/08/2023]
Abstract
Conventional, intensively managed coffee plantations are currently facing environmental challenges. The use of shade trees and the organic management of coffee crops are welcome alternatives, aiming to reduce synthetic inputs and restore soil biological balance. However, little is known about the impacts of the different types of shade tree species on soil functioning and fauna. In this paper, we assess soil nutrient availability and food web structure on a 17-year old experimental coffee plantation in Turrialba in Costa Rica. Three shade types (unshaded coffee, shaded with Terminalia amazonia, and shaded with Erythrina poepiggiana) combined with two management practices (organic and conventional) were evaluated. Total C and N, inorganic N and Olsen P content, soil pH, global soil fertility, and nematode and microarthropod communities were measured in the top 10 cm soil layer, with the objective of determining how shade tree species impact the soil food web and soil C, N and P cycling under different types of management. We noted a decrease in soil inorganic N content and nematode density under conventional management (respectively -47% and -91% compared to organic management), which suggested an important biological imbalance, possibly caused by the lack of organic amendment. Under conventional management, soil nutrient availability and fauna densities were higher under shade, regardless of the shade tree species. Under organic management, only soils under E. poeppigiana, a heavily pruned, N2-fixing species, had increased nutrient availability and fauna density, while T. amazonia shade had a null or negative impact. The effects of coffee management and shade type on soil nutrient availability were mirrored by changes in soil food web structure. Higher fertility was recorded in soil with balanced food webs. These results emphasize the importance of the choice of shade tree species for soil functions in low input systems, more so than in fertilized systems.
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Affiliation(s)
- Marie Sauvadet
- Eco&Sols, Univ Montpellier, IRD, INRA, CIRAD, Montpellier SupAgro, 34000 Montpellier, France; UniLaSalle - AGHYLE research unit UP 2018.C101, Rouen, F-76134 Mont-Saint-Aignan, France
| | - Karel Van den Meersche
- Eco&Sols, Univ Montpellier, IRD, INRA, CIRAD, Montpellier SupAgro, 34000 Montpellier, France; Centro Agronómico Tropical de Investigación y Enseñanza (CATIE), Sede Central, no. 7.170, Cartago 30501, Turrialba, Costa Rica; CIRAD, UMR Eco&Sols, Turrialba, Costa Rica
| | - Clémentine Allinne
- Centro Agronómico Tropical de Investigación y Enseñanza (CATIE), Sede Central, no. 7.170, Cartago 30501, Turrialba, Costa Rica; System, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, 34000 Montpellier, France; CIRAD, UMR System, Turrialba, Costa Rica
| | - Fréderic Gay
- Eco&Sols, Univ Montpellier, IRD, INRA, CIRAD, Montpellier SupAgro, 34000 Montpellier, France; Centro Agronómico Tropical de Investigación y Enseñanza (CATIE), Sede Central, no. 7.170, Cartago 30501, Turrialba, Costa Rica; CIRAD, UMR Eco&Sols, Turrialba, Costa Rica
| | - Elias de Melo Virginio Filho
- Centro Agronómico Tropical de Investigación y Enseñanza (CATIE), Sede Central, no. 7.170, Cartago 30501, Turrialba, Costa Rica
| | - Matthieu Chauvat
- Normandie Université, UNIROUEN, IRSTEA, ECODIV, FED SCALE CNRS 3730, France
| | - Thierry Becquer
- Eco&Sols, Univ Montpellier, IRD, INRA, CIRAD, Montpellier SupAgro, 34000 Montpellier, France
| | - Philippe Tixier
- CIRAD, UPR GECO, F-34398 Montpellier, France; GECO, Univ Montpellier, CIRAD, Montpellier, France
| | - Jean-Michel Harmand
- Eco&Sols, Univ Montpellier, IRD, INRA, CIRAD, Montpellier SupAgro, 34000 Montpellier, France; CIRAD, UMR Eco&Sols, Yaounde, Cameroon; World Agroforestry Centre (ICRAF), West and Central Africa Regional Programme, Yaounde, Cameroon.
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14
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Poeydebat C, Carval D, Tixier P, Daribo MO, De Bellaire LDL. Ecological Regulation of Black Leaf Streak Disease Driven by Plant Richness in Banana Agroecosystems. Phytopathology 2018; 108:1184-1195. [PMID: 29726762 DOI: 10.1094/phyto-12-17-0402-r] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Black leaf streak disease (BLSD), caused by the fungus Mycosphaerella fijiensis, is an important threat to banana production. Although its control relies on costly and unsustainable use of fungicides, ecological regulation of BLSD linked to field-scale plant diversity has received little attention. We monitored banana phytometers in plots in banana-based fields where no fungicides were applied. Within each plot, we measured plant richness in three strata, canopy openness, necrotic leaf removal, Musa abundance and richness. We quantified ecological regulation of five BLSD parameters (inoculum sources, spore abundance, lesion density, incubation time, and the area under the disease progression curve) and identified, using structural equation modeling, the characteristics of the plant community and the mechanisms likely responsible for the regulation. Regulation occurred, but most effectively before lesion formation, and was mainly related to plant richness between 1.5 and 5m high. A barrier effect, rather than a dilution effect, more likely limited spore abundance. Our results support the hypothesis that the potential effects of plant richness on leaf-scale microclimate variability and on the diversity of epiphyllic microorganisms are involved in the regulation of incubation time and lesion density. Field-scale management of plant diversity may be a promising lever to foster ecological regulation of BLSD.
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Affiliation(s)
- Charlotte Poeydebat
- First, second, and fourth authors: CIRAD, UPR GECO, F-97285 Le Lamentin, Martinique, France; first, second, third, and fifth authors: CIRAD, UPR GECO, F-34398 Montpellier, France; first, second, third, and fifth authors: GECO, University of Montpellier, CIRAD, Montpellier, France; and third author: Departamento de Agricultura y Agroforesteria, CATIE, Turrialba, Cartago, Costa Rica
| | - Dominique Carval
- First, second, and fourth authors: CIRAD, UPR GECO, F-97285 Le Lamentin, Martinique, France; first, second, third, and fifth authors: CIRAD, UPR GECO, F-34398 Montpellier, France; first, second, third, and fifth authors: GECO, University of Montpellier, CIRAD, Montpellier, France; and third author: Departamento de Agricultura y Agroforesteria, CATIE, Turrialba, Cartago, Costa Rica
| | - Philippe Tixier
- First, second, and fourth authors: CIRAD, UPR GECO, F-97285 Le Lamentin, Martinique, France; first, second, third, and fifth authors: CIRAD, UPR GECO, F-34398 Montpellier, France; first, second, third, and fifth authors: GECO, University of Montpellier, CIRAD, Montpellier, France; and third author: Departamento de Agricultura y Agroforesteria, CATIE, Turrialba, Cartago, Costa Rica
| | - Marie-Odette Daribo
- First, second, and fourth authors: CIRAD, UPR GECO, F-97285 Le Lamentin, Martinique, France; first, second, third, and fifth authors: CIRAD, UPR GECO, F-34398 Montpellier, France; first, second, third, and fifth authors: GECO, University of Montpellier, CIRAD, Montpellier, France; and third author: Departamento de Agricultura y Agroforesteria, CATIE, Turrialba, Cartago, Costa Rica
| | - Luc De Lapeyre De Bellaire
- First, second, and fourth authors: CIRAD, UPR GECO, F-97285 Le Lamentin, Martinique, France; first, second, third, and fifth authors: CIRAD, UPR GECO, F-34398 Montpellier, France; first, second, third, and fifth authors: GECO, University of Montpellier, CIRAD, Montpellier, France; and third author: Departamento de Agricultura y Agroforesteria, CATIE, Turrialba, Cartago, Costa Rica
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15
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Poeydebat C, Tixier P, De Bellaire LDL, Carval D. Dataset on the regulation of banana weevil abundance and corm damage associated with plant richness and the ground-dwelling arthropods' food web. Data Brief 2017; 15:208-212. [PMID: 29214190 PMCID: PMC5712055 DOI: 10.1016/j.dib.2017.09.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Accepted: 09/07/2017] [Indexed: 12/02/2022] Open
Abstract
The data presented in this article are related to the research article entitled "Plant richness enhances banana weevil regulation in a tropical agroecosystem by affecting a multitrophic food web " [1]. It provides information about plant species richness, weevil corm damage and the abundance of different arthropod groups, including the banana weevil and its potential natural enemies and alternative preys.
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Affiliation(s)
- Charlotte Poeydebat
- CIRAD, UPR GECO, F-97285 Le Lamentin, Martinique, France.,CIRAD, UPR GECO, F-34398 Montpellier, France
| | - Philippe Tixier
- CIRAD, UPR GECO, F-34398 Montpellier, France.,Departamento de Agricultura y Agroforesteria, CATIE, CR-30501 Turrialba, Costa Rica
| | | | - Dominique Carval
- CIRAD, UPR GECO, F-97285 Le Lamentin, Martinique, France.,CIRAD, UPR GECO, F-34398 Montpellier, France
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16
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Dassou AG, Tixier P, Dépigny S, Carval D. Vegetation structure of plantain-based agrosystems determines numerical dominance in community of ground-dwelling ants. PeerJ 2017; 5:e3917. [PMID: 29152414 PMCID: PMC5689021 DOI: 10.7717/peerj.3917] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 09/22/2017] [Indexed: 11/20/2022] Open
Abstract
In tropics, ants can represent an important part of animal biomass and are known to be involved in ecosystem services, such as pest regulation. Understanding the mechanisms underlying the structuring of local ant communities is therefore important in agroecology. In the humid tropics of Africa, plantains are cropped in association with many other annual and perennial crops. Such agrosystems differ greatly in vegetation diversity and structure and are well-suited for studying how habitat-related factors affect the ant community. We analysed abundance data for the six numerically dominant ant taxa in 500 subplots located in 20 diversified, plantain-based fields. We found that the density of crops with foliage at intermediate and high canopy strata determined the numerical dominance of species. We found no relationship between the numerical dominance of each ant taxon with the crop diversity. Our results indicate that the manipulation of the densities of crops with leaves in the intermediate and high strata may help maintain the coexistence of ant species by providing different habitat patches. Further research in such agrosystems should be performed to assess if the effect of vegetation structure on ant abundance could result in efficient pest regulation.
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Affiliation(s)
- Anicet Gbéblonoudo Dassou
- BIORAVE, Faculty of Sciences and Technologies, Dassa, UNSTIM, Benin.,CARBAP, Douala, Cameroon.,UPR GECO, CIRAD, Montpellier, France
| | - Philippe Tixier
- UPR GECO, CIRAD, Montpellier, France.,Departemento de Agricultura y Agroforestria, CATIE, Turrialba, Costa Rica
| | - Sylvain Dépigny
- CARBAP, Douala, Cameroon.,UPR GECO, CIRAD, Montpellier, France
| | - Dominique Carval
- UPR GECO, CIRAD, Montpellier, France.,UPR GECO, CIRAD, Le Lamentin, France
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17
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Ngo Bieng MA, Alem L, Curtet C, Tixier P. Tree spacing impacts the individual incidence of Moniliophthora roreri disease in cacao agroforests. Pest Manag Sci 2017; 73:2386-2392. [PMID: 28581254 DOI: 10.1002/ps.4635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 05/25/2017] [Accepted: 05/28/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Using conventional pesticides in crop protection has raised serious environmental concerns and there is therefore a need for integrated pest management (IPM) methods. In this paper, we found that the spacing of trees can impact disease, which could result in a reduction in pesticide applications and may act as a potential IPM method. We studied Frosty Pod Rot (FPR) in 20 cacao agroforests in Costa Rica (Upala region). RESULTS Using a generalized linear mixed model, we analyzed the impact of the neighborhood composition and distance from a studied cacao individual on its individual FPR incidence. We found that the number of cacao tree neighbors in a radius of 3.7 m and the number of fruit trees in a radius of 4.3 m had a significant negative influence on the incidence of FPR on individual cacao trees. Moreover, cacao tree neighbors had the most significant local influence compared to the neighborhood of other taller categories such as fruit or forest trees. CONCLUSION The mechanisms involved are related to the barrier effect, due to the effectiveness of the cacao tree's architecture as an efficient barrier against FPR spore dispersal. This paper provides new insights into optimization of the spatial environment around each host as an original IPM method. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Marie Ange Ngo Bieng
- CIRAD, UMR SYSTEM, 30501 Turrialba, Costa Rica
- CIRAD, UMR SYSTEM, F-34398 Montpellier, France
- CATIE, 30501 Turrialba, Costa Rica
| | - Laudine Alem
- CIRAD, UMR SYSTEM, 30501 Turrialba, Costa Rica
- CIRAD, UMR SYSTEM, F-34398 Montpellier, France
- CATIE, 30501 Turrialba, Costa Rica
| | - Chloé Curtet
- CIRAD, UMR SYSTEM, 30501 Turrialba, Costa Rica
- CIRAD, UMR SYSTEM, F-34398 Montpellier, France
- CATIE, 30501 Turrialba, Costa Rica
| | - Philippe Tixier
- CATIE, 30501 Turrialba, Costa Rica
- CIRAD, UPR GECO, F-34398 Montpellier, France
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Leandro-Muñoz ME, Tixier P, Germon A, Rakotobe V, Phillips-Mora W, Maximova S, Avelino J. Effects of microclimatic variables on the symptoms and signs onset of Moniliophthora roreri, causal agent of Moniliophthora pod rot in cacao. PLoS One 2017; 12:e0184638. [PMID: 28972981 PMCID: PMC5626025 DOI: 10.1371/journal.pone.0184638] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 08/28/2017] [Indexed: 11/18/2022] Open
Abstract
Moniliophthora Pod Rot (MPR) caused by the fungus Moniliophthora roreri (Cif.) Evans et al., is one of the main limiting factors of cocoa production in Latin America. Currently insufficient information on the biology and epidemiology of the pathogen limits the development of efficient management options to control MPR. This research aims to elucidate MPR development through the following daily microclimatic variables: minimum and maximum temperatures, wetness frequency, average temperature and relative humidity in the highly susceptible cacao clone Pound-7 (incidence = 86% 2008-2013 average). A total of 55 cohorts totaling 2,268 pods of 3-10 cm length, one to two months of age, were tagged weekly. Pods were assessed throughout their lifetime, every one or two weeks, and classified in 3 different categories: healthy, diseased with no sporulation, diseased with sporulating lesions. As a first step, we used Generalized Linear Mixed Models (GLMM) to determine with no a priori the period (when and for how long) each climatic variable was better related with the appearance of symptoms and sporulation. Then the significance of the candidate variables was tested in a complete GLMM. Daily average wetness frequency from day 14 to day 1, before tagging, and daily average maximum temperature from day 4 to day 21, after tagging, were the most explanatory variables of the symptoms appearance. The former was positively linked with the symptoms appearance when the latter exhibited a maximum at 30°C. The most important variables influencing sporulation were daily average minimum temperature from day 35 to day 58 and daily average maximum temperature from day 37 to day 48, both after tagging. Minimum temperature was negatively linked with the sporulation while maximum temperature was positively linked. Results indicated that the fungal microclimatic requirements vary from the early to the late cycle stages, possibly due to the pathogen's long latent period. This information is valuable for development of new conceptual models for MPR and improvement of control methods.
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Affiliation(s)
- Mariela E. Leandro-Muñoz
- Agroforestry and Sustainable Agriculture Department, Division of Research and Development, Tropical Agricultural Research and Higher Education Center, Turrialba, Cartago, Costa Rica
| | - Philippe Tixier
- Agroforestry and Sustainable Agriculture Department, Division of Research and Development, Tropical Agricultural Research and Higher Education Center, Turrialba, Cartago, Costa Rica
- CIRAD, UPR GECO, Montpellier, France
| | - Amandine Germon
- ENSAIA, Vandoeuvre, France
- CIRAD, UPR Bioagresseurs, Montpellier, France
| | | | - Wilbert Phillips-Mora
- Agroforestry and Sustainable Agriculture Department, Division of Research and Development, Tropical Agricultural Research and Higher Education Center, Turrialba, Cartago, Costa Rica
| | - Siela Maximova
- The Department of Plant Science, The Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Jacques Avelino
- Agroforestry and Sustainable Agriculture Department, Division of Research and Development, Tropical Agricultural Research and Higher Education Center, Turrialba, Cartago, Costa Rica
- CIRAD, UPR Bioagresseurs, Montpellier, France
- IICA-PROMECAFE, Guatemala, Guatemala
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Jacquot M, Tixier P, Flores O, Muru D, Massol F, Derepas B, Chiroleu F, Deguine JP. Contrasting predation services of predator and omnivore diversity mediated by invasive ants in a tropical agroecosystem. Basic Appl Ecol 2017. [DOI: 10.1016/j.baae.2016.09.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Cerda R, Avelino J, Gary C, Tixier P, Lechevallier E, Allinne C. Primary and Secondary Yield Losses Caused by Pests and Diseases: Assessment and Modeling in Coffee. PLoS One 2017; 12:e0169133. [PMID: 28046054 PMCID: PMC5207401 DOI: 10.1371/journal.pone.0169133] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Accepted: 12/12/2016] [Indexed: 11/19/2022] Open
Abstract
The assessment of crop yield losses is needed for the improvement of production systems that contribute to the incomes of rural families and food security worldwide. However, efforts to quantify yield losses and identify their causes are still limited, especially for perennial crops. Our objectives were to quantify primary yield losses (incurred in the current year of production) and secondary yield losses (resulting from negative impacts of the previous year) of coffee due to pests and diseases, and to identify the most important predictors of coffee yields and yield losses. We established an experimental coffee parcel with full-sun exposure that consisted of six treatments, which were defined as different sequences of pesticide applications. The trial lasted three years (2013-2015) and yield components, dead productive branches, and foliar pests and diseases were assessed as predictors of yield. First, we calculated yield losses by comparing actual yields of specific treatments with the estimated attainable yield obtained in plots which always had chemical protection. Second, we used structural equation modeling to identify the most important predictors. Results showed that pests and diseases led to high primary yield losses (26%) and even higher secondary yield losses (38%). We identified the fruiting nodes and the dead productive branches as the most important and useful predictors of yields and yield losses. These predictors could be added in existing mechanistic models of coffee, or can be used to develop new linear mixed models to estimate yield losses. Estimated yield losses can then be related to production factors to identify corrective actions that farmers can implement to reduce losses. The experimental and modeling approaches of this study could also be applied in other perennial crops to assess yield losses.
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Affiliation(s)
- Rolando Cerda
- CIRAD, UMR System, 2 place Pierre Viala, Montpellier, France
- CATIE, Program of Sustainable Agriculture and Agroforestry, Turrialba, Costa Rica
| | - Jacques Avelino
- CIRAD, UMR System, 2 place Pierre Viala, Montpellier, France
- CIRAD, UR Bioagresseurs, TA A-106—Avenue Agropolis, Montpellier, France
- IICA, AP 55, Coronado, San José, Costa Rica
| | - Christian Gary
- INRA, UMR System, 2 place Pierre Viala, Montpellier, France
| | - Philippe Tixier
- CIRAD, UMR System, 2 place Pierre Viala, Montpellier, France
- CIRAD, UPR GECO, TA B-26 / PS4—Boulevard de la Lironde—Montpellier, France
| | - Esther Lechevallier
- CIRAD, UMR System, 2 place Pierre Viala, Montpellier, France
- ENSAT, Avenue de l'Agrobiopole, Auzeville-Tolosane, France
| | - Clémentine Allinne
- CIRAD, UMR System, 2 place Pierre Viala, Montpellier, France
- CATIE, Program of Sustainable Agriculture and Agroforestry, Turrialba, Costa Rica
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Poeydebat C, Carval D, de Lapeyre de Bellaire L, Tixier P. Balancing competition for resources with multiple pest regulation in diversified agroecosystems: a process-based approach to reconcile diversification and productivity. Ecol Evol 2016; 6:8607-8616. [PMID: 28031811 PMCID: PMC5167016 DOI: 10.1002/ece3.2453] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 08/11/2016] [Accepted: 08/15/2016] [Indexed: 11/08/2022] Open
Abstract
Agroecosystem plant diversification can enhance pest biological regulation and is a promising alternative to pesticide application. However, the costs of competition for resources between plants may exceed the benefits gained by pest regulation. To disentangle the interactions between pest regulation and competition, we developed a generic process‐based approach that accounts for the effects of an associated plant and leaf and root pests on biomass production. We considered three crop–plant associations that differ in competition profiles, and we simulated biomass production under wide ranges of both pest regulation rates and resources’ availability. We analyzed outputs to quantify the pest regulation service level that would be required to attain monoculture yield and other production goals. Results showed that pest regulation requirements were highly dependent on the profile of resource interception of the associated plant and on resources’ availability. Pest regulation and the magnitude of competition between plants interacted in determining the balance between nitrogen and radiation uptake by the crop. Our findings suggest that productivity of diversified agroecosystems relative to monoculture should be optimized by assembling plants whose characteristics balance crops’ resource acquisition. The theoretical insights from our study draw generic rules for vegetation assemblage to optimize trade‐offs between pest regulation and production. Our findings and approach may have implications in understanding, theorizing and implementing agroecosystem diversification. By its generic and adaptable structure, our approach should be useful for studying the effects of diversification in many agroecosystems.
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Affiliation(s)
| | | | | | - Philippe Tixier
- UPR 26 GECO CIRAD Montpellier Cedex 5 France; Departamento de Agricultura y Agroforesteria CATIE Cartago Turrialba Costa Rica
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22
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Carval D, Cotté V, Resmond R, Perrin B, Tixier P. Dominance in a ground-dwelling ant community of banana agroecosystem. Ecol Evol 2016; 6:8617-8631. [PMID: 28031812 PMCID: PMC5167050 DOI: 10.1002/ece3.2570] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 09/24/2016] [Accepted: 09/30/2016] [Indexed: 11/10/2022] Open
Abstract
In tropical ecosystems, ants represent a substantial portion of the animal biomass and contribute to various ecosystem services, including pest regulation and pollination. Dominant ant species are known to determine the structure of ant communities by interfering in the foraging of other ant species. Using bait and pitfall trapping experiments, we performed a pattern analysis at a fine spatial scale of an ant community in a very simplified and homogeneous agroecosystem, that is, a single-crop banana field in Martinique (French West Indies). We found that the community structure was driven by three dominant species (Solenopsis geminata, Nylanderia guatemalensis, and Monomorium ebeninum) and two subdominant species (Pheidole fallax and Brachymyrmex patagonicus). Our results showed that dominant and subdominant species generally maintained numerical dominance at baits across time, although S. geminata, M. ebeninum, and B. patagonicus displayed better abilities to maintain dominance than P. fallax and N. guatemalensis. Almost all interspecific correlations between species abundances, except those between B. patagonicus and N. guatemalensis, were symmetrically negative, suggesting that interference competition prevails in this ground-dwelling ant community. However, we observed variations in the diurnal and nocturnal foraging activity and in the daily occurrence at baits, which may mitigate the effect of interference competition through the induction of spatial and temporal niche partitioning. This may explain the coexistence of dominant, subdominant, and subordinate species in this very simplified agroecosystem, limited in habitat structure and diversity.
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Affiliation(s)
| | | | | | | | - Philippe Tixier
- CIRADUPR GECO Montpellier France; Departamento de Agricultura y Agroforesteria CATIE Turrialba Costa Rica
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23
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Dassou AG, Carval D, Dépigny S, Fansi G, Tixier P. Dataset on the abundance of ants and Cosmopolites sordidus damage in plantain fields with intercropped plants. Data Brief 2016; 9:17-23. [PMID: 27622207 PMCID: PMC5008051 DOI: 10.1016/j.dib.2016.08.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Revised: 08/04/2016] [Accepted: 08/13/2016] [Indexed: 10/27/2022] Open
Abstract
The data presented in this article are related to the research article entitled "Ant abundance and Cosmopolites sordidus damage in plantain fields as affected by intercropping" (A.G. Dassou, D. Carval, S. Dépigny, G.H Fansi, P. Tixier, 2015) [1]. This article describes how associated crops maize (Zea mays), cocoyam (Xanthosoma sagittifolium) and bottle gourd (Lagenaria siceraria) intercropped in the plantain fields in Cameroun modify ant community structure and damages of banana weevil Cosmopolites sordidus. The field data set is made publicly available to enable critical or extended analyzes.
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Affiliation(s)
- Anicet Gbèblonoudo Dassou
- CIRAD, Persyst, UPR GECO, TA B-26/PS4, Boulevard de la Lironde, 34398 Montpellier Cedex 5, France; CARBAP, African Research Centre on Bananas and Plantains, BP 832 Douala, Cameroon; Laboratory of Biotechnology, Genetic Resources and Plant and Animal Breeding (BIORAVE), Faculty of Sciences and Technology of Dassa, Polytechnic University of Abomey, 01 BP 14 Dassa-Zoumè, Benin
| | - Dominique Carval
- CIRAD, Persyst, UPR GECO, TA B-26/PS4, Boulevard de la Lironde, 34398 Montpellier Cedex 5, France; CIRAD, UPR GECO, F-97285 Le Lamentin, Martinique, France
| | - Sylvain Dépigny
- CIRAD, Persyst, UPR GECO, TA B-26/PS4, Boulevard de la Lironde, 34398 Montpellier Cedex 5, France; CARBAP, African Research Centre on Bananas and Plantains, BP 832 Douala, Cameroon
| | - Gabriel Fansi
- CARBAP, African Research Centre on Bananas and Plantains, BP 832 Douala, Cameroon
| | - Philippe Tixier
- CIRAD, Persyst, UPR GECO, TA B-26/PS4, Boulevard de la Lironde, 34398 Montpellier Cedex 5, France; Departamento de Agricultura y Agroforesteria, CATIE, 7170, Cartago, Turrialba 30501, Costa Rica
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24
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Boudrot A, Pico J, Merle I, Granados E, Vílchez S, Tixier P, Filho EDMV, Casanoves F, Tapia A, Allinne C, Rice RA, Avelino J. Shade Effects on the Dispersal of Airborne Hemileia vastatrix Uredospores. Phytopathology 2016; 106:572-580. [PMID: 26828230 DOI: 10.1094/phyto-02-15-0058-r] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Hemileia vastatrix caused a severe epidemic in Central America in 2012-13. The gradual development of that epidemic on nearly a continental scale suggests that dispersal at different scales played a significant role. Shade has been proposed as a way of reducing uredospore dispersal. The effect of shade (two strata: Erythrina poeppigiana below and Chloroleucon eurycyclum above) and full sun on H. vastatrix dispersal was studied with Burkard traps in relation to meteorological records. Annual and daily patterns of dispersal were observed, with peaks of uredospore capture obtained during wet seasons and in the early afternoon. A maximum of 464 uredospores in 1 day (in 14.4 m(3) of air) was recorded in October 2014. Interactions between shade/full sun and meteorological conditions were found. Rainfall, possibly intercepted by tree cover and redistributed by raindrops of higher kinetic energy, was the main driver of uredospore dispersal under shade. Wind gusts reversed this effect, probably by inhibiting water accumulation on leaves. Wind gusts also promoted dispersal under dry conditions in full sun, whereas they had no effect under shaded conditions, probably because the canopy blocked the wind. Our results indicate the importance of managing shade cover differentially in rainy versus dry periods to control the dispersal of airborne H. vastatrix uredospores.
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Affiliation(s)
- Audrey Boudrot
- First author: Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes; first, third, and twelfth authors: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France; second author: INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador; second, fifth, sixth, seventh, eighth, tenth, and twelfth authors: CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica; third author: ENSAIA, Protection des cultures, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandæuvre-lès-Nancy, France; fourth and ninth authors: Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica; sixth author: CIRAD, Persyst, UPR 26, TA B-26/PS4, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France; tenth author: CIRAD, UMR System, SupAgro Montpellier, 2 place P. Viala, 34060 Montpellier, France; eleventh author: Migratory Bird Center, Smithsonian Conservation Biology Institute MRC 5503, Washington, DC, 20013-7012; and twelfth author: IICA-PROMECAFE, AP. 55, 2200 Coronado, San José, Costa Rica
| | - Jimmy Pico
- First author: Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes; first, third, and twelfth authors: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France; second author: INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador; second, fifth, sixth, seventh, eighth, tenth, and twelfth authors: CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica; third author: ENSAIA, Protection des cultures, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandæuvre-lès-Nancy, France; fourth and ninth authors: Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica; sixth author: CIRAD, Persyst, UPR 26, TA B-26/PS4, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France; tenth author: CIRAD, UMR System, SupAgro Montpellier, 2 place P. Viala, 34060 Montpellier, France; eleventh author: Migratory Bird Center, Smithsonian Conservation Biology Institute MRC 5503, Washington, DC, 20013-7012; and twelfth author: IICA-PROMECAFE, AP. 55, 2200 Coronado, San José, Costa Rica
| | - Isabelle Merle
- First author: Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes; first, third, and twelfth authors: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France; second author: INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador; second, fifth, sixth, seventh, eighth, tenth, and twelfth authors: CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica; third author: ENSAIA, Protection des cultures, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandæuvre-lès-Nancy, France; fourth and ninth authors: Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica; sixth author: CIRAD, Persyst, UPR 26, TA B-26/PS4, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France; tenth author: CIRAD, UMR System, SupAgro Montpellier, 2 place P. Viala, 34060 Montpellier, France; eleventh author: Migratory Bird Center, Smithsonian Conservation Biology Institute MRC 5503, Washington, DC, 20013-7012; and twelfth author: IICA-PROMECAFE, AP. 55, 2200 Coronado, San José, Costa Rica
| | - Eduardo Granados
- First author: Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes; first, third, and twelfth authors: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France; second author: INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador; second, fifth, sixth, seventh, eighth, tenth, and twelfth authors: CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica; third author: ENSAIA, Protection des cultures, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandæuvre-lès-Nancy, France; fourth and ninth authors: Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica; sixth author: CIRAD, Persyst, UPR 26, TA B-26/PS4, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France; tenth author: CIRAD, UMR System, SupAgro Montpellier, 2 place P. Viala, 34060 Montpellier, France; eleventh author: Migratory Bird Center, Smithsonian Conservation Biology Institute MRC 5503, Washington, DC, 20013-7012; and twelfth author: IICA-PROMECAFE, AP. 55, 2200 Coronado, San José, Costa Rica
| | - Sergio Vílchez
- First author: Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes; first, third, and twelfth authors: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France; second author: INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador; second, fifth, sixth, seventh, eighth, tenth, and twelfth authors: CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica; third author: ENSAIA, Protection des cultures, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandæuvre-lès-Nancy, France; fourth and ninth authors: Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica; sixth author: CIRAD, Persyst, UPR 26, TA B-26/PS4, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France; tenth author: CIRAD, UMR System, SupAgro Montpellier, 2 place P. Viala, 34060 Montpellier, France; eleventh author: Migratory Bird Center, Smithsonian Conservation Biology Institute MRC 5503, Washington, DC, 20013-7012; and twelfth author: IICA-PROMECAFE, AP. 55, 2200 Coronado, San José, Costa Rica
| | - Philippe Tixier
- First author: Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes; first, third, and twelfth authors: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France; second author: INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador; second, fifth, sixth, seventh, eighth, tenth, and twelfth authors: CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica; third author: ENSAIA, Protection des cultures, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandæuvre-lès-Nancy, France; fourth and ninth authors: Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica; sixth author: CIRAD, Persyst, UPR 26, TA B-26/PS4, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France; tenth author: CIRAD, UMR System, SupAgro Montpellier, 2 place P. Viala, 34060 Montpellier, France; eleventh author: Migratory Bird Center, Smithsonian Conservation Biology Institute MRC 5503, Washington, DC, 20013-7012; and twelfth author: IICA-PROMECAFE, AP. 55, 2200 Coronado, San José, Costa Rica
| | - Elías de Melo Virginio Filho
- First author: Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes; first, third, and twelfth authors: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France; second author: INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador; second, fifth, sixth, seventh, eighth, tenth, and twelfth authors: CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica; third author: ENSAIA, Protection des cultures, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandæuvre-lès-Nancy, France; fourth and ninth authors: Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica; sixth author: CIRAD, Persyst, UPR 26, TA B-26/PS4, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France; tenth author: CIRAD, UMR System, SupAgro Montpellier, 2 place P. Viala, 34060 Montpellier, France; eleventh author: Migratory Bird Center, Smithsonian Conservation Biology Institute MRC 5503, Washington, DC, 20013-7012; and twelfth author: IICA-PROMECAFE, AP. 55, 2200 Coronado, San José, Costa Rica
| | - Fernando Casanoves
- First author: Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes; first, third, and twelfth authors: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France; second author: INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador; second, fifth, sixth, seventh, eighth, tenth, and twelfth authors: CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica; third author: ENSAIA, Protection des cultures, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandæuvre-lès-Nancy, France; fourth and ninth authors: Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica; sixth author: CIRAD, Persyst, UPR 26, TA B-26/PS4, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France; tenth author: CIRAD, UMR System, SupAgro Montpellier, 2 place P. Viala, 34060 Montpellier, France; eleventh author: Migratory Bird Center, Smithsonian Conservation Biology Institute MRC 5503, Washington, DC, 20013-7012; and twelfth author: IICA-PROMECAFE, AP. 55, 2200 Coronado, San José, Costa Rica
| | - Ana Tapia
- First author: Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes; first, third, and twelfth authors: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France; second author: INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador; second, fifth, sixth, seventh, eighth, tenth, and twelfth authors: CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica; third author: ENSAIA, Protection des cultures, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandæuvre-lès-Nancy, France; fourth and ninth authors: Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica; sixth author: CIRAD, Persyst, UPR 26, TA B-26/PS4, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France; tenth author: CIRAD, UMR System, SupAgro Montpellier, 2 place P. Viala, 34060 Montpellier, France; eleventh author: Migratory Bird Center, Smithsonian Conservation Biology Institute MRC 5503, Washington, DC, 20013-7012; and twelfth author: IICA-PROMECAFE, AP. 55, 2200 Coronado, San José, Costa Rica
| | - Clémentine Allinne
- First author: Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes; first, third, and twelfth authors: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France; second author: INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador; second, fifth, sixth, seventh, eighth, tenth, and twelfth authors: CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica; third author: ENSAIA, Protection des cultures, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandæuvre-lès-Nancy, France; fourth and ninth authors: Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica; sixth author: CIRAD, Persyst, UPR 26, TA B-26/PS4, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France; tenth author: CIRAD, UMR System, SupAgro Montpellier, 2 place P. Viala, 34060 Montpellier, France; eleventh author: Migratory Bird Center, Smithsonian Conservation Biology Institute MRC 5503, Washington, DC, 20013-7012; and twelfth author: IICA-PROMECAFE, AP. 55, 2200 Coronado, San José, Costa Rica
| | - Robert A Rice
- First author: Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes; first, third, and twelfth authors: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France; second author: INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador; second, fifth, sixth, seventh, eighth, tenth, and twelfth authors: CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica; third author: ENSAIA, Protection des cultures, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandæuvre-lès-Nancy, France; fourth and ninth authors: Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica; sixth author: CIRAD, Persyst, UPR 26, TA B-26/PS4, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France; tenth author: CIRAD, UMR System, SupAgro Montpellier, 2 place P. Viala, 34060 Montpellier, France; eleventh author: Migratory Bird Center, Smithsonian Conservation Biology Institute MRC 5503, Washington, DC, 20013-7012; and twelfth author: IICA-PROMECAFE, AP. 55, 2200 Coronado, San José, Costa Rica
| | - Jacques Avelino
- First author: Agrocampus Ouest, 65, rue de Saint Brieuc 35000 Rennes; first, third, and twelfth authors: CIRAD, UPR Bioagresseurs, F-34398, Montpellier, France; second author: INIAP, Estación experimental Joya de los Sachas 220350, Orellana, Ecuador; second, fifth, sixth, seventh, eighth, tenth, and twelfth authors: CATIE, 7170, Cartago, Turrialba, 30501, Costa Rica; third author: ENSAIA, Protection des cultures, 2 Avenue de la Forêt de Haye, TSA 40602, 54518 Vandæuvre-lès-Nancy, France; fourth and ninth authors: Universidad de Costa Rica, sede del Atlántico, Turrialba, Costa Rica; sixth author: CIRAD, Persyst, UPR 26, TA B-26/PS4, Boulevard de la Lironde, 34398, Montpellier Cedex 5, France; tenth author: CIRAD, UMR System, SupAgro Montpellier, 2 place P. Viala, 34060 Montpellier, France; eleventh author: Migratory Bird Center, Smithsonian Conservation Biology Institute MRC 5503, Washington, DC, 20013-7012; and twelfth author: IICA-PROMECAFE, AP. 55, 2200 Coronado, San José, Costa Rica
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25
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Carval D, Resmond R, Achard R, Tixier P. Data on the abundance of the banana weevil Cosmopolites sordidus and of the earwig Euborellia caraibea in bare soil and cover crop plots. Data Brief 2016; 7:1565-9. [PMID: 27222854 PMCID: PMC4865667 DOI: 10.1016/j.dib.2016.04.056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 04/15/2016] [Accepted: 04/21/2016] [Indexed: 11/04/2022] Open
Abstract
The data presented in this article are related to the research article entitled “Cover cropping reduces the abundance of the banana weevil Cosmopolites sordidus but does not reduce its damage to the banana plants” (Carval et al., in press) [1]. This article describes how the abundance of the banana weevil, Cosmopolites sordidus, and the abundance of the earwig Euborellia caraibea were affected by the addition of a cover crop. The field data set is made publicly available to enable critical or extended analyzes.
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Affiliation(s)
- Dominique Carval
- Campus Agroenvironnemental Caraibes, CIRAD, UPR GECO, Petit Morne, F-97285 Le Lamentin, Martinique, France
| | - Rémi Resmond
- Campus Agroenvironnemental Caraibes, CIRAD, UPR GECO, Petit Morne, F-97285 Le Lamentin, Martinique, France
| | - Raphaël Achard
- Campus Agroenvironnemental Caraibes, CIRAD, UPR GECO, Petit Morne, F-97285 Le Lamentin, Martinique, France
| | - Philippe Tixier
- CIRAD, UPR GECO, F-34398 Montpellier, France; Departamento de Agricultura y Agroforesteria, CATIE, CR-30501 Turrialba, Costa Rica
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26
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Carval D, Perrin B, Duyck PF, Tixier P. Local and neighboring patch conditions alter sex-specific movement in banana weevils. Ecol Evol 2016; 5:5735-43. [PMID: 27069621 PMCID: PMC4813121 DOI: 10.1002/ece3.1818] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Revised: 10/12/2015] [Accepted: 10/14/2015] [Indexed: 11/06/2022] Open
Abstract
Understanding the mechanisms underlying the movements and spread of a species over time and space is a major concern of ecology. Here, we assessed the effects of an individual's sex and the density and sex ratio of conspecifics in the local and neighboring environment on the movement probability of the banana weevil, Cosmopolites sordidus. In a "two patches" experiment, we used radiofrequency identification tags to study the C. sordidus movement response to patch conditions. We showed that local and neighboring densities of conspecifics affect the movement rates of individuals but that the density-dependent effect can be either positive or negative depending on the relative densities of conspecifics in local and neighboring patches. We demonstrated that sex ratio also influences the movement of C. sordidus, that is, the weevil exhibits nonfixed sex-biased movement strategies. Sex-biased movement may be the consequence of intrasexual competition for resources (i.e., oviposition sites) in females and for mates in males. We also detected a high individual variability in the propensity to move. Finally, we discuss the role of demographic stochasticity, sex-biased movement, and individual heterogeneity in movement on the colonization process.
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Affiliation(s)
| | | | | | - Philippe Tixier
- Departamento de Agricultura y Agroforesteria CATIE CR-30501 Turrialba Costa Rica
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Dassou AG, Tixier P. Response of pest control by generalist predators to local-scale plant diversity: a meta-analysis. Ecol Evol 2016; 6:1143-53. [PMID: 26839684 PMCID: PMC4725331 DOI: 10.1002/ece3.1917] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 12/02/2015] [Accepted: 12/08/2015] [Indexed: 11/24/2022] Open
Abstract
Disentangling the effects of plant diversity on the control of herbivores is important for understanding agricultural sustainability. Recent studies have investigated the relationships between plant diversity and arthropod communities at the landscape scale, but few have done so at the local scale. We conducted a meta-analysis of 32 papers containing 175 independent measures of the relationship between plant diversity and arthropod communities. We found that generalist predators had a strong positive response to plant diversity, that is, their abundance increased as plant diversity increased. Herbivores, in contrast, had an overall weak and negative response to plant diversity. However, specialist and generalist herbivores differed in their response to plant diversity, that is, the response was negative for specialists and not significant for generalists. While the effects of scale remain unclear, the response to plant diversity tended to increase for specialist herbivores, but decrease for generalist herbivores as the scale increased. There was no clear effect of scale on the response of generalist predators to plant diversity. Our results suggest that the response of herbivores to plant diversity at the local scale is a balance between habitat and trophic effects that vary according to arthropod specialization and habitat type. Synthesis and applications. Positive effects of plant diversity on generalist predators confirm that, at the local scale, plant diversification of agroecosystems is a credible and promising option for increasing pest regulation. Results from our meta-analysis suggest that natural control in plant-diversified systems is more likely to occur for specialist than for generalist herbivores. In terms of pest management, our results indicate that small-scale plant diversification (via the planting of cover crops or intercrops and reduced weed management) is likely to increase the control of specialist herbivores by generalist predators.
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Affiliation(s)
- Anicet Gbèblonoudo Dassou
- CIRADPersystUPR 26TA B‐26/PS4, Boulevard de la Lironde34398Montpellier Cedex 5France
- CARBAPAfrican Research Centre on Bananas and PlantainsBP 832DoualaCameroon
- Laboratory of Biotechnology, Genetic Resources and Plant and Animal Breeding (BIORAVE)Faculty of Sciences and Technology of DassaPolytechnic University of Abomey01 BP 14Dassa‐ZoumèBenin
| | - Philippe Tixier
- CIRADPersystUPR 26TA B‐26/PS4, Boulevard de la Lironde34398Montpellier Cedex 5France
- Departamento de Agricultura y AgroforesteriaCATIE7170 CartagoTurrialba30501Costa Rica
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Dassou AG, Dépigny S, Canard E, Vinatier F, Carval D, Tixier P. Contrasting effects of plant diversity across arthropod trophic groups in plantain-based agroecosystems. Basic Appl Ecol 2016. [DOI: 10.1016/j.baae.2015.09.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Affiliation(s)
- P. Tixier
- Centre d'Etudes Biologiques de Chizé (CEBC); UMR 7372; CNRS-Université de la Rochelle; Villiers en Bois France
| | - M. Authier
- Observatoire PELAGIS, UMS 3462 du CNRS; Université de La Rochelle; La Rochelle France
| | - N. Gasco
- Département des Milieux et Peuplements Aquatiques; Muséum National d'Histoire Naturelle; Paris France
| | - C. Guinet
- Centre d'Etudes Biologiques de Chizé (CEBC); UMR 7372; CNRS-Université de la Rochelle; Villiers en Bois France
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Mollot G, Duyck PF, Lefeuvre P, Lescourret F, Martin JF, Piry S, Canard E, Tixier P. Cover cropping alters the diet of arthropods in a banana plantation: a metabarcoding approach. PLoS One 2014; 9:e93740. [PMID: 24695585 PMCID: PMC3973587 DOI: 10.1371/journal.pone.0093740] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Accepted: 03/06/2014] [Indexed: 11/27/2022] Open
Abstract
Plant diversification using cover crops may promote natural regulation of agricultural pests by supporting alternative prey that enable the increase of arthropod predator densities. However, the changes in the specific composition of predator diet induced by cover cropping are poorly understood. Here, we hypothesized that the cover crop can significantly alter the diet of predators in agroecosystems. The cover crop Brachiaria decumbens is increasingly used in banana plantations to control weeds and improve physical soil properties. In this paper, we used a DNA metabarcoding approach for the molecular analysis of the gut contents of predators (based on mini-COI) to identify 1) the DNA sequences of their prey, 2) the predators of Cosmopolites sordidus (a major pest of banana crops), and 3) the difference in the specific composition of predator diets between a bare soil plot (BSP) and a cover cropped plot (CCP) in a banana plantation. The earwig Euborellia caraibea, the carpenter ant Camponotus sexguttatus, and the fire ant Solenopsis geminata were found to contain C. sordidus DNA at frequencies ranging from 1 to 7%. While the frequencies of predators positive for C. sordidus DNA did not significantly differ between BSP and CCP, the frequency at which E. caraibea was positive for Diptera was 26% in BSP and 80% in CCP; the frequency at which C. sexguttatus was positive for Jalysus spinosus was 14% in BSP and 0% in CCP; and the frequency at which S. geminata was positive for Polytus mellerborgi was 21% in BSP and 3% in CCP. E. caraibea, C. sexguttatus and S. geminata were identified as possible biological agents for the regulation of C. sordidus. The detection of the diet changes of these predators when a cover crop is planted indicates the possible negative effects on pest regulation if predators switch to forage on alternative prey.
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Affiliation(s)
- Gregory Mollot
- CIRAD, UR 26 Systèmes de culture à base de bananiers, plantains et ananas, PRAM, Le Lamentin, Martinique, France
- INRA, UR-1115 Plantes et Systèmes de culture Horticoles, Avignon, France
| | - Pierre-François Duyck
- CIRAD, UR 26 Systèmes de culture à base de bananiers, plantains et ananas, PRAM, Le Lamentin, Martinique, France
- CIRAD, UMR PVBMT, CIRAD/Université de La Réunion, Pôle de Protection des Plantes, Saint-Pierre, La Réunion, France
- * E-mail:
| | - Pierre Lefeuvre
- CIRAD, UMR PVBMT, CIRAD/Université de La Réunion, Pôle de Protection des Plantes, Saint-Pierre, La Réunion, France
| | | | | | | | - Elsa Canard
- CIRAD, UR 26 Systèmes de culture à base de bananiers, plantains et ananas, PRAM, Le Lamentin, Martinique, France
- CNRS-IRD, UMR 2724 MIVEGEC, Montpellier, France
| | - Philippe Tixier
- CIRAD, UR 26 Systèmes de culture à base de bananiers, plantains et ananas, PRAM, Le Lamentin, Martinique, France
- CIRAD – CATIE, Departamento de Agricultura y Agroforesteria, CATIE, Turrialba, Costa Rica
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Duyck PF, Dortel E, Vinatier F, Gaujoux E, Carval D, Tixier P. Effect of environment and fallow period on Cosmopolites sordidus population dynamics at the landscape scale. Bull Entomol Res 2012; 102:583-588. [PMID: 22405143 DOI: 10.1017/s0007485312000089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Understanding how the population dynamics of insect pests are affected by environmental factors and agricultural practices is important for pest management. To investigate how the abundance of the banana weevil, Cosmopolites sordidus (Coleoptera: Curculionidae), is related to environmental factors and the length of the fallow period in Martinique, we developed an extensive data set (18,130 observations of weevil abundance obtained with pheromone traps plus associated environmental data) and analysed it with generalized mixed-effects models. At the island scale, C. sordidus abundance was positively related to mean temperature and negatively related to mean rainfall but was not related to soil type. The number of insects trapped was highest during the driest months of the year. Abundance of C. sordidus decreased as the duration of the preceding fallow period increased. The latter finding is inconsistent with the view that fallow-generated decomposing banana tissue is an important resource for larvae that leads to an increase in the pest population. The results are consistent with the view that fallows, in association with pheromone traps, are effective for the control of the banana weevil.
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Affiliation(s)
- P-F Duyck
- CIRAD, UPR Systèmes Bananes et Ananas, Pôle de Recherche Agro-environnementale de la Martinique, BP 214, 97285 Le Lamentin Cedex 2, Martinique, French West Indies
| | - E Dortel
- CIRAD, UPR Systèmes Bananes et Ananas, Pôle de Recherche Agro-environnementale de la Martinique, BP 214, 97285 Le Lamentin Cedex 2, Martinique, French West Indies
| | - F Vinatier
- CIRAD, UPR Systèmes Bananes et Ananas, Pôle de Recherche Agro-environnementale de la Martinique, BP 214, 97285 Le Lamentin Cedex 2, Martinique, French West Indies
| | - E Gaujoux
- APEX, Batiment 4, Zone de belle Étoile, 97230 Sainte Marie, Martinique, French West Indies
| | - D Carval
- CIRAD, UPR Systèmes Bananes et Ananas, Pôle de Recherche Agro-environnementale de la Martinique, BP 214, 97285 Le Lamentin Cedex 2, Martinique, French West Indies
| | - P Tixier
- CIRAD, UPR Systèmes Bananes et Ananas, Pôle de Recherche Agro-environnementale de la Martinique, BP 214, 97285 Le Lamentin Cedex 2, Martinique, French West Indies
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Lavigne C, Achard R, Tixier P, Lesueur Jannoyer M. HOW TO INTEGRATE COVER CROPS TO ENHANCE SUSTAINABILITY IN BANANA AND CITRUS CROPPING SYSTEMS. ACTA ACUST UNITED AC 2012. [DOI: 10.17660/actahortic.2012.928.47] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Vinatier F, Lescourret F, Duyck PF, Martin O, Senoussi R, Tixier P. Should I stay or should I go? A habitat-dependent dispersal kernel improves prediction of movement. PLoS One 2011; 6:e21115. [PMID: 21765890 PMCID: PMC3134457 DOI: 10.1371/journal.pone.0021115] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2011] [Accepted: 05/19/2011] [Indexed: 11/26/2022] Open
Abstract
The analysis of animal movement within different landscapes may increase our understanding of how landscape features affect the perceptual range of animals. Perceptual range is linked to movement probability of an animal via a dispersal kernel, the latter being generally considered as spatially invariant but could be spatially affected. We hypothesize that spatial plasticity of an animal's dispersal kernel could greatly modify its distribution in time and space. After radio tracking the movements of walking insects (Cosmopolites sordidus) in banana plantations, we considered the movements of individuals as states of a Markov chain whose transition probabilities depended on the habitat characteristics of current and target locations. Combining a likelihood procedure and pattern-oriented modelling, we tested the hypothesis that dispersal kernel depended on habitat features. Our results were consistent with the concept that animal dispersal kernel depends on habitat features. Recognizing the plasticity of animal movement probabilities will provide insight into landscape-level ecological processes.
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Vinatier F, Tixier P, Duyck PF, Lescourret F. Factors and mechanisms explaining spatial heterogeneity: a review of methods for insect populations. Methods Ecol Evol 2010. [DOI: 10.1111/j.2041-210x.2010.00059.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Vinatier F, Chailleux A, Duyck PF, Salmon F, Lescourret F, Tixier P. Radiotelemetry unravels movements of a walking insect species in heterogeneous environments. Anim Behav 2010. [DOI: 10.1016/j.anbehav.2010.04.022] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Vinatier F, Tixier P, Le Page C, Duyck PF, Lescourret F. COSMOS, a spatially explicit model to simulate the epidemiology of Cosmopolites sordidus in banana fields. Ecol Modell 2009. [DOI: 10.1016/j.ecolmodel.2009.06.023] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Tixier P, Chabrier C, Malézieux E. Pesticide residues in heterogeneous plant populations, a model-based approach applied to nematicides in banana (Musa spp.). J Agric Food Chem 2007; 55:2504-8. [PMID: 17305357 DOI: 10.1021/jf062710f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Nematicides are widely used to control plant-parasitic nematodes in intensive export banana (Musa spp.) cropping systems. Data show that the concentration of fosthiazate in banana fruits varies from zero to 0.035 g kg-1, under the maximal residue limit (MRL=0.05 mg kg-1). The fosthiazate concentration in fruit is described by a Gaussian envelope curve function of the interval between pesticide application and fruit harvest (preharvest interval). The heterogeneity of phenological stages in a banana population increases over time, and thus the preharvest interval of fruits harvested after a pesticide application varies over time. A phenological model was used to simulate the long-term harvest dynamics of banana at field scale. Simulations show that the mean fosthiazate concentration in fruits varies according to nematicide application program, climate (temperature), and planting date of the banana field. This method is used to assess the percentage of harvested bunches that exceed a residue threshold and to help farmers minimize fosthiazate residues in bananas.
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Affiliation(s)
- Philippe Tixier
- CIRAD, UPR 26, PRAM - BP 214 - 97285 Lamentin Cedex 2 - Martinique, French West Indies, France.
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Tixier P, Verger JB, Rabia M, Bardeche P, Brodi L. [Crohn's disease of the colon treated with high doses of levamisole]. Nouv Presse Med 1978; 7:3942. [PMID: 733561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Diebold J, Tixier P, Baufine-Ducrocq H, Tricot G, Verger JP, Wierzbicki N. [Lymphadenopathy caused by hemophagocytic sinus histiocytosis (Destombes-Rosai-Dorfman syndrome). Immunologic and histopathologic study of a new case]. Ann Anat Pathol (Paris) 1976; 21:347-56. [PMID: 188359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The case reported is one of lymphadenopathy due to haemophagocytic sinusal histiocytosis which had progressed for more than 10 years before resulting in death at the age of 58 years. In this advanced form, all superficial and deep nodes were involved. In addition to histiocytic hyperplasia, with haemophagocytosis and lipid overload, there was plasmocytic hyperplasia, i.e. B-lymphocytes, with polyclonal hypergamma-globulinaemia and an increase in the levels of many antibodies, in particular against rubella and the Epstein-Barr virus. The aetiopathological significance is discussed, in particular the role of an infection due to the EB virus.
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Dieabold J, Tricot G, Tixier P, Verger JB, Baufine-Ducrocq H, Wierzbicki N. [Letter: Diffuse lymphadenopathy due to hemophagocytic sinusal histiocytosis]. Nouv Presse Med 1976; 5:1644. [PMID: 1084990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Legrain M, Baguet JC, Laplane D, Tixier P, Guy-Grand B. [Recurrent coma with hyperammoniemia and gaseous alkalosis in a patient with a uretero-colonic anastomosis]. J Urol Nephrol (Paris) 1967; 73:461-74. [PMID: 5634165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Legrain M, Baguet JC, Laplane D, Tixier P, Guy-Grand B. [Fetal hepatic coma after ureterocolonic anastomosis]. Presse Med (1893) 1967; 75:749-750. [PMID: 6022942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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