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Aulicky R, Stejskal V, Frydova B, Athanassiou C. Evaluation of Phosphine Resistance in Populations of Sitophilus oryzae, Oryzaephilus surinamensis and Rhyzopertha dominica in the Czech Republic. INSECTS 2022; 13:1162. [PMID: 36555073 PMCID: PMC9787142 DOI: 10.3390/insects13121162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 12/08/2022] [Accepted: 12/14/2022] [Indexed: 06/17/2023]
Abstract
Phosphine is globally the most widely adopted fumigant for the control of storage pests. Recently, an increase in the frequency of stored-product pest resistance has been observed with significant geographical and interspecific variations. In this context, there are available data for the occurrence of resistant populations from America, Asia, Africa, and Australia, but there are few data in the case of Europe. Therefore, the aim of this work was to evaluate phosphine efficacy in important beetle pests of stored products, i.e., Sitophilus oryzae (L.), Oryzaephilus surinamensis (L.), and Rhyzopertha dominica (F.) sampled from the Czech Republic, using a rapid diagnostic test that is based on the speed to knockdown after exposure. Apart from the standard laboratory populations, which were used as the controls, we tested 56 field populations of these three species, collected in Czech farm grain stores. The survey revealed that 57.1% of the tested field populations were classified as phosphine-susceptible, based on the knockdown method used. However, profound variations among species and populations were recorded. The species with the highest percentage of resistant populations was R. dominica (71.4% of the populations; resistance coefficient 0.5-4.1), followed by S. oryzae (57.1% of the populations; resistance coefficient 0.8-6.9), and O. surinamensis (9.5% of the populations; resistance coefficient 0.5-2.9). Regarding the intra-population variability in response to phosphine (slope of the knockdown time regression), the laboratory and slightly resistant populations of all species were homogenous, whereas the most resistant populations were strongly heterogeneous. Our data show that the occurrence of resistance in the Czech Republic is relatively widespread and covers a wide range of species, necessitating the need for the adoption of an action plan for resistance mitigation.
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Affiliation(s)
- Radek Aulicky
- Crop Research Institute, Drnovska 507, 161 00 Prague, Czech Republic
| | - Vaclav Stejskal
- Crop Research Institute, Drnovska 507, 161 00 Prague, Czech Republic
| | - Barbora Frydova
- Crop Research Institute, Drnovska 507, 161 00 Prague, Czech Republic
| | - Christos Athanassiou
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Tessaly, Phytokou Str., 38446 Nea Ionia, Magnesia, Greece
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The Correlation between Volatile Compounds Emitted from Sitophilus granarius (L.) and Its Electrophysiological and Behavioral Responses. INSECTS 2022; 13:insects13050478. [PMID: 35621812 PMCID: PMC9147048 DOI: 10.3390/insects13050478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/06/2022] [Accepted: 05/17/2022] [Indexed: 12/10/2022]
Abstract
Simple Summary Postharvest loss has become a crucial issue for the grain supply chain. Storage of grain without losses in quality is a critically important aspect of global food security. The monitoring and detection of insect infestations in stored grain is essential to inform pest management decisions. Insect olfaction is a principal sensory modality for sensing semiochemicals from their external environment and regulates their behaviors. Some semiochemicals function as attractants or repellents, which could be used for insect surveillance and pest control. In this study, the granary weevil Sitophilus granarius (L.), was used as an example to evaluate volatile compounds released from the weevils’ and their initiated electrophysiological and behavioral responses. An improved understanding of S.granarius chemical ecology will lead to developing more efficient and environmentally friendly pest control strategies and technologies. Abstract The granary weevil Sitophilus granarius (L.) is one of the most serious primary insect pests of stored products. When S. granarius present in grains, various volatile organic compounds are released as chemical signals which can be used to detect the insects. In this study, volatile chemical compounds released from S. granarius were analyzed using the headspace solid phase micro-extraction (HS-SPME) coupled with gas chromatography (GC)–mass spectrometry (MS) techniques. Two key compounds, 3-hydroxy-2-butanone and 1-pentadecene, were identified from mixed gender of S. granarius adults at high density. Moreover, both male and female adults showed dose-dependent electroantennography (EAG) responses to 3-hydroxy-2-butanone. In behavioral assays, S. granarius was attracted to 3-hydroxy-2-butanone at 0.001 µg/10 µL but repelled at 10 µg/10 µL or higher. S. granarius was consistently repelled by 1-pentadecene at concentrations at 0.001 and 1000 µg/10 µL. 3-hydroxy-2-butanone and 1-pentadecene have considerable potential to offer in the development of new approaches for the monitoring and management of this destructive stored grain insect pest.
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Mbata GN, Toews MD. Recent Advances in Postharvest Pest Biology and Management. INSECTS 2021; 12:543. [PMID: 34207995 PMCID: PMC8230592 DOI: 10.3390/insects12060543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 06/08/2021] [Indexed: 11/25/2022]
Abstract
A sizable proportion (about 8%) of the world population is facing food insecurity [...].
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Affiliation(s)
- George N. Mbata
- Agriculture Research Station, Fort Valley State University, Fort Valley, GA 31030, USA
| | - Michael D. Toews
- Department of Entomology, University of Georgia, Athens, GA 30601, USA;
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Agrafioti P, Brabec DL, Morrison WR, Campbell JF, Athanassiou CG. Scaling recovery of susceptible and resistant stored product insects after short exposures to phosphine by using automated video-tracking software. PEST MANAGEMENT SCIENCE 2021; 77:1245-1255. [PMID: 33051965 DOI: 10.1002/ps.6135] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 10/06/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Phosphine-susceptible or resistant populations of Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) and Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae) adults were exposed to 0 (control), 1000 and 3000 ppm of phosphine for 15 or 90 min, to estimate behavioral and mobility responses after exposure to phosphine. Knockdown of the exposed individuals after exposure was recorded visually. The total distance moved and velocity of movement were assessed immediately after exposure to phosphine, 2 or 24 h later using a camera coupled with automated video tracking software (i.e. Ethovision®). RESULTS For both species tested, the highest percentage of dead adults was noted at the highest concentration (3000 ppm) for both exposure times. For T. castaneum, total distance moved and velocity decreased as the concentration increased for the susceptible population, whereas there was significant variation among individuals in the resistant population. For R. dominica, the distance moved was reduced at the highest concentrations. Individuals of R. dominica moved less than those of T. castaneum and there were significant differences in mobility between susceptible and resistant populations for both species tested. Recovery was much faster in the case of the resistant populations. CONCLUSIONS Changes in movement parameters can be further exploited in assessing the efficacy of different management tactics, such as trapping and sampling. Automated video tracking systems such as Ethovision® can be used to track and record insect behavioral response, providing a more objective measure of insecticide efficacy than visual categorizations. These data shed light on insect mobility and behavioral responses to fumigation treatments in relation to resistance. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Paraskevi Agrafioti
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Volos, Greece
| | - Daniel L Brabec
- Center for Grain and Animal Health Research, USDA, Agricultural Research Service, Manhattan, KS, USA
| | - William R Morrison
- Center for Grain and Animal Health Research, USDA, Agricultural Research Service, Manhattan, KS, USA
| | - James F Campbell
- Center for Grain and Animal Health Research, USDA, Agricultural Research Service, Manhattan, KS, USA
| | - Christos G Athanassiou
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Volos, Greece
- Center for Grain and Animal Health Research, USDA, Agricultural Research Service, Manhattan, KS, USA
- Institute of Bio-Economy and Agri-Technology (iBO), Center for Research and Technology, Volos, Greece
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Delayed mortality, resistance and the sweet spot, as the good, the bad and the ugly in phosphine use. Sci Rep 2021; 11:3933. [PMID: 33594183 PMCID: PMC7887275 DOI: 10.1038/s41598-021-83463-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 01/15/2021] [Indexed: 11/26/2022] Open
Abstract
Phosphine is the most commonly used gas for fumigation for durable commodities globally, but there is still inadequate information regarding its efficacy in conjunction with proper concentration monitoring. In a series of bioassays, insect mortality after specific exposure intervals to phosphine in selected species was examined, as well as the appearance of the so called "sweet spot". The species that were tested were: Oryzaephilus surinamensis (L.), Tribolium castaneum (Herbst), Sitophilus oryzae (L.) and Rhyzopertha dominica (F.) with populations that had different levels of phosphine resistance. Evaluation was conducted by using the Phosphine Tolerance Test (PTT), with exposure of the adult stage for 15, 30, 60, 90, 150 and 300 min at 3000 ppm. At the end of these intervals (separate bioassays for each time interval), the insects were transferred to Petri dishes, in which recovery was recorded at different time intervals (2 h, 1, 2 and 7 days). The majority of susceptible populations of all species were instantly immobilized even in the shortest exposure period (15 min), in contrast with resistant populations that were active even after 300 min. After exposure to phosphine, populations and exposure time affected mortality of susceptible populations, whereas resistant populations recovered regardless of species and exposure time. Additional bioassays at the concentrations of 500, 1000, 2000 and 3000 ppm for 1, 3, 5, 20, 30 and 40 h showed the presence of the "sweet spot", i.e., decrease of mortality with the increase of concentration. In fact, for most of the tested species, the "sweet spot" appeared in 1000 and 2000 ppm at a 5-h exposure time, regardless of the level of resistance to phosphine. This observation is particularly important both in terms of the assessment of resistance and in the context of non-linear recovery at elevated concentrations, indicating the occurrence of strong hormetic reversals in phosphine efficacy.
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Lee HK, Jeong G, Kim HK, Kim BS, Yang JO, Koo HN, Kim GH. Fumigation Activity against Phosphine-Resistant Tribolium castaneum (Coleoptera: Tenebrionidae) Using Carbonyl Sulfide. INSECTS 2020; 11:E750. [PMID: 33142868 PMCID: PMC7692873 DOI: 10.3390/insects11110750] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 10/26/2020] [Accepted: 10/29/2020] [Indexed: 12/05/2022]
Abstract
Phosphine resistance is occurring among stored-grain pests worldwide. This study investigated the fumigation activity of phosphine (PH3) and carbonyl sulfide (COS) against domestic strain (d-strain) Tribolium castaneum, resistance strain (r-strain) T. castaneum and Oryzaephilus surinamensis. All developmental stages of the pests were exposed to two fumigants (PH3 and COS), and the fumigation activity according to the dose and exposure time was evaluated in a 12-L desiccator and 0.5 m3 fumigation chamber. The rice sorption rate and quality following exposure to thetwofumigants were evaluated. The mortality was 2.9% in r-strain T. castaneum, 49.5% in d-strain T. castaneum and 99.2% in O. surinamensis when 2 mg/L PH3 was used in a 12-L desiccator for 4 h. However, all pest developmental stages showed 100% mortality after 24 h of exposure in the 0.5 m3 fumigation chamber, except for the r-strain T. castaneum. A mortalityof 100% was observed in all of the r-strain T. castaneum developmental stages at an exposure time of 192 h. For COS applied at 40.23 mg/L and 50 g/m3 in the 12-L desiccator and the 0.5 m3 fumigation chamber, respectively, 100% mortality was observed across all developmental stages regardless of species and strain. The sorption of COS was 10% higher than that of PH3, but there was no significant difference in rice quality compared to that in the control. Therefore, this study suggests that COS can be used for controlling T. castaneum resistant to PH3.
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Affiliation(s)
- Han Kyung Lee
- Department of Plant Medicine, College of Agriculture, Life and Environment Science, Chungbuk National University, Cheongju 28644, Korea; (H.K.L.); (G.J.); (H.K.K.); (H.-N.K.)
| | - Geunho Jeong
- Department of Plant Medicine, College of Agriculture, Life and Environment Science, Chungbuk National University, Cheongju 28644, Korea; (H.K.L.); (G.J.); (H.K.K.); (H.-N.K.)
| | - Hyun Kyung Kim
- Department of Plant Medicine, College of Agriculture, Life and Environment Science, Chungbuk National University, Cheongju 28644, Korea; (H.K.L.); (G.J.); (H.K.K.); (H.-N.K.)
| | - Bong-Su Kim
- Plant Quarantine Technology Center, Animal and Plant Quarantine Agency, Gyeongsangbuk-do 39660, Korea; (B.-S.K.); (J.-O.Y.)
| | - Jeong-Oh Yang
- Plant Quarantine Technology Center, Animal and Plant Quarantine Agency, Gyeongsangbuk-do 39660, Korea; (B.-S.K.); (J.-O.Y.)
| | - Hyun-Na Koo
- Department of Plant Medicine, College of Agriculture, Life and Environment Science, Chungbuk National University, Cheongju 28644, Korea; (H.K.L.); (G.J.); (H.K.K.); (H.-N.K.)
| | - Gil-Hah Kim
- Department of Plant Medicine, College of Agriculture, Life and Environment Science, Chungbuk National University, Cheongju 28644, Korea; (H.K.L.); (G.J.); (H.K.K.); (H.-N.K.)
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Nayak MK, Daglish GJ, Phillips TW, Ebert PR. Resistance to the Fumigant Phosphine and Its Management in Insect Pests of Stored Products: A Global Perspective. ANNUAL REVIEW OF ENTOMOLOGY 2020; 65:333-350. [PMID: 31610132 DOI: 10.1146/annurev-ento-011019-025047] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Development of resistance in major grain insect pest species to the key fumigant phosphine (hydrogen phosphide) across the globe has put the viability and sustainability of phosphine in jeopardy. The resistance problem has been aggravated over the past two decades, due mostly to the lack of suitable alternatives matching the major attributes of phosphine, including its low price, ease of application, proven effectiveness against a broad pest spectrum, compatibility with most storage conditions, and international acceptance as a residue-free treatment. In this review, we critically analyze the published literature in the area of phosphine resistance with special emphasis on the methods available for detection of resistance, the genetic basis of resistance development, key management strategies, and research gaps that need to be addressed.
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Affiliation(s)
- Manoj K Nayak
- Department of Agriculture and Fisheries, Ecosciences Precinct, Dutton Park, Brisbane, Queensland 4102, Australia; ,
| | - Gregory J Daglish
- Department of Agriculture and Fisheries, Ecosciences Precinct, Dutton Park, Brisbane, Queensland 4102, Australia; ,
| | - Thomas W Phillips
- Department of Entomology, Kansas State University, Manhattan, Kansas 66506, USA;
| | - Paul R Ebert
- School of Biological Sciences, University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia;
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Mangoba MAA, Alvindia DDG. Response of Suidasia pontifica (Acaridida: Suidasiidae) to phosphine fumigation. EXPERIMENTAL & APPLIED ACAROLOGY 2019; 79:377-386. [PMID: 31677025 DOI: 10.1007/s10493-019-00433-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 10/25/2019] [Indexed: 06/10/2023]
Abstract
The present study evaluated the level of phosphine toxicity of various strains of Suidasia pontifica, infesting stored agricultural products in the Philippines. The bioassays for the efficacy of phosphine fumigation followed the FAO standard method. A full assay comprised eight concentrations ranging from 0.005 to 1.00 mg/L with 20, 72 and 144-h exposure periods. A total of 15 strains were collected, representing 15 provinces in the country. Results revealed that the most susceptible strain (MR12gsn) was recorded from a private owned warehouse in General Santos City-LC50 and LC99 were 0.009 and 0.025 mg/L, respectively. On the other hand, the most resistant strain (LR3tar) was collected from a private owned warehouse in Tarlac City-LC50 and LC99 were 1.501 and 2.407 mg/L, based on discrimination dose tests. Eggs were more tolerant than the adults; complete mortality of eggs was achieved at 0.50 mg/L for 72 h and 0.35 mg/L for 144 h, whereas complete mortality of adults was obtained with 0.10 and 0.20 mg/L for 144 and 72 h exposure, respectively. The estimated minimum effective concentration (MEC) of phosphine to give complete kill of S. pontifica at various exposure periods must exceed 0.50 mg/L for 72 and 144 h. These results simply illustrate the increased efficiency (i.e., increased mortality) of phosphine fumigation of longer exposure of S. pontifica to lower concentrations.
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Affiliation(s)
- Mark Anthony Angeles Mangoba
- Food Protection Division, Philippine Center for Postharvest Development and Mechanization (PHilMech), Science City of Muñoz, Nueva Ecija, Philippines.
| | - Dionisio de Guzman Alvindia
- Food Protection Division, Philippine Center for Postharvest Development and Mechanization (PHilMech), Science City of Muñoz, Nueva Ecija, Philippines
- Center for Natural Sciences and Environmental Research (CENSER), De La Salle University, Taft Ave., Manila, Philippines
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Vassilakos TN, Riudavets J, Castañé C, Iturralde-Garcia RD, Athanassiou CG. Efficacy of Modified Atmospheres on Trogoderma granarium (Coleoptera: Dermestidae) and Sitophilus zeamais (Coleoptera: Curculionidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2019; 112:2450-2457. [PMID: 31287864 DOI: 10.1093/jee/toz139] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Indexed: 06/09/2023]
Abstract
We investigated the efficacy of two types of modified atmospheres (MA) against adults of the khapra beetle, Trogoderma granarium Everts, and the maize weevil, Sitophilus zeamais Motschulsky, under laboratory conditions. Adults of the above species on wheat were exposed to a carbon dioxide (CO2) concentration of 70% or a low oxygen (O2) concentration of 0.1% for durations of 0.67 (16 h), 1, 2, 4, and 6 d and stored in an environmental chamber set at 28 ± 2°C, 70 ± 5% RH, and a photoperiod of 16:8 (L:D) h. After each exposure interval, immediate mortality and knockdown were recorded, and the surviving or knocked down individuals were transferred to normal atmospheres and returned to the environmental chamber, where survival was recorded 7 d later. In addition, after the immediate and delayed mortality counts, all adults were removed from the substrate, and the number of progeny produced was recorded 60 d later. Both MA conditions totally controlled (100% mortality) the adults of T. granarium and S. zeamais immediately after a 6-d exposure or after a 4-d exposure when delayed mortality was taken into account, showing the postexposure effect of the MA. Moreover, high CO2 was more effective than low O2 for S. zeamais, whereas the reverse was true for T. granarium. The 4-d exposure period was crucial for the production of progeny of both species because after that period surviving insects did not produce offspring. Our results show that both MA conditions can be used with success to control these species.
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Affiliation(s)
- Thomas N Vassilakos
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Nea Ionia, Magnesia, Greece
- IRTA, Ctra. Cabrils, Cabrils, Barcelona, Spain
| | | | | | | | - Christos G Athanassiou
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Environment, University of Thessaly, Nea Ionia, Magnesia, Greece
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Elamir EE, Almadiy AA, Nenaah GE, Alabas AA, Alsaqri HS. Comparing six mathematical link function models of the antifeedant activity of lesser grain borer exposed to sub-lethal concentrations of some extracts from calotropis procera. Bioengineered 2019; 10:292-305. [PMID: 31284815 PMCID: PMC6650199 DOI: 10.1080/21655979.2019.1641399] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Abstract
In the present study, Probit, Cauchy Fractional and three types of Log methods, i.e., Logit, Log-log, and Complementary log-log were employed to model the feeding deterrence of the lesser grain borer, Rhyzopertha dominica (F) (Coleoptera: Bostrichidae), when fed latex protein, crude flavonoid fraction, 3-O-rutinosides of quercetin, kaempferol and isorhamnetin, isolated from Calotropis procera (Ait.) (Gentianales: Asclepiadaceae). A nutritional study with treated flour discs at sub-lethal concentrations indicated that the tested natural products negatively affected the feeding behavior of the lesser grain borer, causing high feeding deterrent indices. Our results assure that Probit, Logit and Clog-log model the feeding deterrent indices with high goodness of fit. The models aim to support the management of the test insect when fed grains treated with sub-lethal doses of the tested phytochemicals in order to develop a viable, precise and long-term strategy to minimize the excessive reliance on the chemical pesticides currently in use.
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Affiliation(s)
- Elhadi E Elamir
- a Department of Mathematics , Najran University , Najran , Kingdom of Saudi Arabia
| | | | - Gomah E Nenaah
- b Department of Biology , Najran University , Najran , Kingdom of Saudi Arabia
| | - Abdullah A Alabas
- a Department of Mathematics , Najran University , Najran , Kingdom of Saudi Arabia
| | - Hajer S Alsaqri
- a Department of Mathematics , Najran University , Najran , Kingdom of Saudi Arabia
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Corrêa AS, Vinson CC, Braga LS, Guedes RNC, de Oliveira LO. Ancient origin and recent range expansion of the maize weevil Sitophilus zeamais, and its genealogical relationship to the rice weevil S. oryzae. BULLETIN OF ENTOMOLOGICAL RESEARCH 2017; 107:9-20. [PMID: 27806733 DOI: 10.1017/s0007485316000687] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Archeological records attest the early association of Sitophilus with stored cereals from the beginning of agriculture on Asia. The maize weevil (Sitophilus zeamais) became particularly damaging to maize, a cereal crop domesticated on Mesoamerica. We investigated the late evolutionary history of the maize weevil to gain insights on its origin, timing of association with maize, and genealogical relationship to the almost morphologically indistinguishable rice weevil (Sitophilus oryzae). Two mitochondrial genes (cytochrome oxidase subunit I and cytochrome oxidase subunit II) and the nuclear ribosomal gene region were partially sequenced. Analyses showed that the maize weevil shared no haplotypes with the rice weevil; instead, each species exhibited distinct mitogroups and ribogroups. The two weevil species likely split about 8.7 million years ago (95% highest posterior density: 4.0-15.0). Microsatellite data analyses sorted the 309 specimens from 15 populations of the maize weevil into three genotypic groups, which displayed low genetic differentiation and widespread occurrence worldwide. The maize weevil and the rice weevil are each a distinct species; both of which emerged prior to the onset of agriculture. The maize-maize weevil association took place after maize became widespread as a global crop. The maize weevil populations lack spatial genetic structure at the regional, continental, and intercontinental scales.
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Affiliation(s)
- A S Corrêa
- Departamento de Entomologia,Universidade Federal de Viçosa,Viçosa, MG 36570-900,Brazil
| | - C C Vinson
- Departamento de Bioquímica e Biologia Molecular,Universidade Federal de Viçosa,Viçosa, MG 36570-900,Brazil
| | - L S Braga
- Departamento de Entomologia,Universidade Federal de Viçosa,Viçosa, MG 36570-900,Brazil
| | - R N C Guedes
- Departamento de Entomologia,Universidade Federal de Viçosa,Viçosa, MG 36570-900,Brazil
| | - L O de Oliveira
- Departamento de Bioquímica e Biologia Molecular,Universidade Federal de Viçosa,Viçosa, MG 36570-900,Brazil
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Tay WT, Beckett SJ, De Barro PJ. Phosphine resistance in Australian Cryptolestes species (Coleoptera: Laemophloeidae): perspectives from mitochondrial DNA cytochrome oxidase I analysis. PEST MANAGEMENT SCIENCE 2016; 72:1250-1259. [PMID: 24753308 DOI: 10.1002/ps.3805] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Revised: 04/14/2014] [Accepted: 04/14/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND The flat grain beetle (FGB) species Cryptolestes ferrugineus, C. pusillus, C. pusilloides and C. turcicus are major stored-product pests worldwide, of which the first three are present in Australia. C. ferrugineus is also a species with high phosphine resistance status in various countries. Morphological identification of Cryptolestes species is difficult and represents an additional barrier to effective management of phosphine resistance in FGBs. RESULT Mitochondrial DNA cytochrome oxidase I (mtDNA COI) gene characterisation enabled differentiation of the four major FGB pest species through direct sequence comparison, and enabled the development of a PCR-RFLP method for rapid species differentiation. We detected two mtDNA haplotypes (Cunk-01, 02) present at low frequencies with an average nucleotide divergence rate of 0.079 ± 0.011 (SE) from C. pusillus. This nucleotide divergence rate is similar to that between C. ferrugineus and C. pusilloides (0.088 ± 0.012). Male and female genitalia morphologies of the Cunk-02 individuals indicated they were consistent with C. pusillus, yet DNA sequence analyses suggested species-level divergence. The mtDNA COI gene of phosphine-bioassayed, lab-reared F1 generation survivors supported the presence of strong phosphine resistance in C. ferrugineus, but unexpectedly also in C. pusilloides and C. pusillus F1 survivors. CONCLUSION We demonstrated the utility of molecular DNA techniques for differentiating closely related insect species, and its usefulness in assisting the management of pest insect species. The likely presence of a cryptic C. pusillus species in Australia and the possible development of strong phosphine resistance in Australian FGB pest species require further investigation. © 2014 Society of Chemical Industry.
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Affiliation(s)
- Wee Tek Tay
- Biosecurity Flagship, CSIRO Ecosystem Sciences, Black Mountain Laboratories, ACT, Australia
- Plant Biosecurity Cooperative Research Centre, Bruce, ACT, Australia
| | - Stephen J Beckett
- Biosecurity Flagship, CSIRO Ecosystem Sciences, Black Mountain Laboratories, ACT, Australia
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Jagadeesan R, Collins PJ, Nayak MK, Schlipalius DI, Ebert PR. Genetic characterization of field-evolved resistance to phosphine in the rusty grain beetle, Cryptolestes ferrugineus (Laemophloeidae: Coleoptera). PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2016; 127:67-75. [PMID: 26821660 DOI: 10.1016/j.pestbp.2015.09.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 09/18/2015] [Accepted: 09/21/2015] [Indexed: 06/05/2023]
Abstract
Inheritance of resistance to phosphine fumigant was investigated in three field-collected strains of rusty grain beetle, Cryptolestes ferrugineus, Susceptible (S-strain), Weakly Resistant (Weak-R) and Strongly Resistant (Strong-R). The strains were purified for susceptibility, weak resistance and strong resistance to phosphine, respectively, to ensure homozygosity of resistance genotype. Crosses were established between S-strain×Weak-R, S-strain×Strong-R and Weak-R×Strong-R, and the dose mortality responses to phosphine of these strains and their F1, F2 and F1-backcross progeny were obtained. The fumigations were undertaken at 25°C and 55% RH for 72h. Weak-R and Strong-R showed resistance factors of 6.3× and 505× compared with S-strain at the LC50. Both weak and strong resistances were expressed as incompletely recessive with degrees of dominance of -0.48 and -0.43 at the LC50, respectively. Responses of F2 and F1-backcross progeny indicated the existence of one major gene in Weak-R, and at least two major genes in Strong-R, one of which was allelic with the major factor in Weak-R. Phenotypic variance analyses also estimated that the number of independently segregating genes conferring weak resistance was 1 (nE=0.89) whereas there were two genes controlling strong resistance (nE=1.2). The second gene, unique to Strong-R, interacted synergistically with the first gene to confer a very high level of resistance (~80×). Neither of the two major resistance genes was sex linked. Despite the similarity of the genetics of resistance to that previously observed in other pest species, a significant proportion (~15 to 30%) of F1 individuals survived at phosphine concentrations higher than predicted. Thus it is likely that additional dominant heritable factors, present in some individuals in the population, also influenced the resistance phenotype. Our results will help in understanding the process of selection for phosphine resistance in the field which will inform resistance management strategies. In addition, this information will provide a basis for the identification of the resistance genes.
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Affiliation(s)
- Rajeswaran Jagadeesan
- Department of Agriculture and Fisheries, Ecosciences Precinct, Level 3C West, GPO Box 267, Brisbane, Queensland 4001, Australia.
| | - Patrick J Collins
- Department of Agriculture and Fisheries, Ecosciences Precinct, Level 3C West, GPO Box 267, Brisbane, Queensland 4001, Australia
| | - Manoj K Nayak
- Department of Agriculture and Fisheries, Ecosciences Precinct, Level 3C West, GPO Box 267, Brisbane, Queensland 4001, Australia
| | - David I Schlipalius
- Department of Agriculture and Fisheries, Ecosciences Precinct, Level 3C West, GPO Box 267, Brisbane, Queensland 4001, Australia
| | - Paul R Ebert
- School of Biological Sciences, The University of Queensland, St. Lucia, Queensland 4072, Australia
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Manivannan S, Swati AP, Hemalatha P, Gisha EK, Roopa RS. Phosphine gas generated from an aluminium phosphide tablet exhibits early knock down effects on tamarind pod borer. RSC Adv 2016. [DOI: 10.1039/c6ra05670a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The tamarind pod borer, Sitophilus linearis (Herbst), is highly susceptible to phosphine fumigation compared to its congener, Sitophilus oryzae.
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Affiliation(s)
- S. Manivannan
- Food Protectants and Infestation Control Department
- CSIR-Central Food Technological Research Institute
- Mysore
- India
| | - A. P. Swati
- Food Protectants and Infestation Control Department
- CSIR-Central Food Technological Research Institute
- Mysore
- India
| | - P. Hemalatha
- Food Protectants and Infestation Control Department
- CSIR-Central Food Technological Research Institute
- Mysore
- India
| | - E. K. Gisha
- Food Protectants and Infestation Control Department
- CSIR-Central Food Technological Research Institute
- Mysore
- India
| | - R. S. Roopa
- Food Protectants and Infestation Control Department
- CSIR-Central Food Technological Research Institute
- Mysore
- India
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15
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Hernandez Nopsa JF, Daglish GJ, Hagstrum DW, Leslie JF, Phillips TW, Scoglio C, Thomas-Sharma S, Walter GH, Garrett KA. Ecological Networks in Stored Grain: Key Postharvest Nodes for Emerging Pests, Pathogens, and Mycotoxins. Bioscience 2015; 65:985-1002. [PMID: 26955074 PMCID: PMC4718207 DOI: 10.1093/biosci/biv122] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Wheat is at peak quality soon after harvest. Subsequently, diverse biota use wheat as a resource in storage, including insects and mycotoxin-producing fungi. Transportation networks for stored grain are crucial to food security and provide a model system for an analysis of the population structure, evolution, and dispersal of biota in networks. We evaluated the structure of rail networks for grain transport in the United States and Eastern Australia to identify the shortest paths for the anthropogenic dispersal of pests and mycotoxins, as well as the major sources, sinks, and bridges for movement. We found important differences in the risk profile in these two countries and identified priority control points for sampling, detection, and management. An understanding of these key locations and roles within the network is a new type of basic research result in postharvest science and will provide insights for the integrated pest management of high-risk subpopulations, such as pesticide-resistant insect pests.
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Affiliation(s)
- John F Hernandez Nopsa
- John F. Hernandez Nopsa ( ) is a postdoctoral research associate in the Institute for Sustainable Food Systems and the Plant Pathology Department at the University of Florida (UF), in Gainesville, and was formerly a postdoctoral research associate in the Department of Plant Pathology at Kansas State University (KSU), in Manhattan, and affiliated with the Plant Biosecurity Cooperative Research Centre (CRC), in Canberra, Australia. Gregory J. Daglish is a principal research scientist at the Department of Agriculture and Fisheries, in Queensland, and is affiliated with the CRC. David W. Hagstrum is a professor in the Department of Entomology at KSU. John F. Leslie is a university distinguished professor in the Department of Plant Pathology at KSU and is affiliated with the CRC. Thomas W. Phillips is Professor Donald A. Wilbur, Sr. Endowed Professor in Stored-Product Protection in the Department of Entomology at KSU and is affiliated with the CRC. Caterina Scoglio is a professor in the Department of Electrical and Computer Engineering at KSU and is affiliated with the CRC. Sara Thomas-Sharma was a postdoctoral research associate in the Department of Plant Pathology at KSU and is currently in the Department of Plant Pathology at the University of Wisconsin-Madison. Gimme H. Walter is a professor in the School of Biological Sciences at the University of Queensland and is affiliated with the CRC. Karen A. Garrett ( ) is a preeminent professor in the Institute for Sustainable Food Systems and Plant Pathology Department at UF, is affiliated with the CRC, and was formerly a professor in the Department of Plant Pathology at KSU
| | - Gregory J Daglish
- John F. Hernandez Nopsa ( ) is a postdoctoral research associate in the Institute for Sustainable Food Systems and the Plant Pathology Department at the University of Florida (UF), in Gainesville, and was formerly a postdoctoral research associate in the Department of Plant Pathology at Kansas State University (KSU), in Manhattan, and affiliated with the Plant Biosecurity Cooperative Research Centre (CRC), in Canberra, Australia. Gregory J. Daglish is a principal research scientist at the Department of Agriculture and Fisheries, in Queensland, and is affiliated with the CRC. David W. Hagstrum is a professor in the Department of Entomology at KSU. John F. Leslie is a university distinguished professor in the Department of Plant Pathology at KSU and is affiliated with the CRC. Thomas W. Phillips is Professor Donald A. Wilbur, Sr. Endowed Professor in Stored-Product Protection in the Department of Entomology at KSU and is affiliated with the CRC. Caterina Scoglio is a professor in the Department of Electrical and Computer Engineering at KSU and is affiliated with the CRC. Sara Thomas-Sharma was a postdoctoral research associate in the Department of Plant Pathology at KSU and is currently in the Department of Plant Pathology at the University of Wisconsin-Madison. Gimme H. Walter is a professor in the School of Biological Sciences at the University of Queensland and is affiliated with the CRC. Karen A. Garrett ( ) is a preeminent professor in the Institute for Sustainable Food Systems and Plant Pathology Department at UF, is affiliated with the CRC, and was formerly a professor in the Department of Plant Pathology at KSU
| | - David W Hagstrum
- John F. Hernandez Nopsa ( ) is a postdoctoral research associate in the Institute for Sustainable Food Systems and the Plant Pathology Department at the University of Florida (UF), in Gainesville, and was formerly a postdoctoral research associate in the Department of Plant Pathology at Kansas State University (KSU), in Manhattan, and affiliated with the Plant Biosecurity Cooperative Research Centre (CRC), in Canberra, Australia. Gregory J. Daglish is a principal research scientist at the Department of Agriculture and Fisheries, in Queensland, and is affiliated with the CRC. David W. Hagstrum is a professor in the Department of Entomology at KSU. John F. Leslie is a university distinguished professor in the Department of Plant Pathology at KSU and is affiliated with the CRC. Thomas W. Phillips is Professor Donald A. Wilbur, Sr. Endowed Professor in Stored-Product Protection in the Department of Entomology at KSU and is affiliated with the CRC. Caterina Scoglio is a professor in the Department of Electrical and Computer Engineering at KSU and is affiliated with the CRC. Sara Thomas-Sharma was a postdoctoral research associate in the Department of Plant Pathology at KSU and is currently in the Department of Plant Pathology at the University of Wisconsin-Madison. Gimme H. Walter is a professor in the School of Biological Sciences at the University of Queensland and is affiliated with the CRC. Karen A. Garrett ( ) is a preeminent professor in the Institute for Sustainable Food Systems and Plant Pathology Department at UF, is affiliated with the CRC, and was formerly a professor in the Department of Plant Pathology at KSU
| | - John F Leslie
- John F. Hernandez Nopsa ( ) is a postdoctoral research associate in the Institute for Sustainable Food Systems and the Plant Pathology Department at the University of Florida (UF), in Gainesville, and was formerly a postdoctoral research associate in the Department of Plant Pathology at Kansas State University (KSU), in Manhattan, and affiliated with the Plant Biosecurity Cooperative Research Centre (CRC), in Canberra, Australia. Gregory J. Daglish is a principal research scientist at the Department of Agriculture and Fisheries, in Queensland, and is affiliated with the CRC. David W. Hagstrum is a professor in the Department of Entomology at KSU. John F. Leslie is a university distinguished professor in the Department of Plant Pathology at KSU and is affiliated with the CRC. Thomas W. Phillips is Professor Donald A. Wilbur, Sr. Endowed Professor in Stored-Product Protection in the Department of Entomology at KSU and is affiliated with the CRC. Caterina Scoglio is a professor in the Department of Electrical and Computer Engineering at KSU and is affiliated with the CRC. Sara Thomas-Sharma was a postdoctoral research associate in the Department of Plant Pathology at KSU and is currently in the Department of Plant Pathology at the University of Wisconsin-Madison. Gimme H. Walter is a professor in the School of Biological Sciences at the University of Queensland and is affiliated with the CRC. Karen A. Garrett ( ) is a preeminent professor in the Institute for Sustainable Food Systems and Plant Pathology Department at UF, is affiliated with the CRC, and was formerly a professor in the Department of Plant Pathology at KSU
| | - Thomas W Phillips
- John F. Hernandez Nopsa ( ) is a postdoctoral research associate in the Institute for Sustainable Food Systems and the Plant Pathology Department at the University of Florida (UF), in Gainesville, and was formerly a postdoctoral research associate in the Department of Plant Pathology at Kansas State University (KSU), in Manhattan, and affiliated with the Plant Biosecurity Cooperative Research Centre (CRC), in Canberra, Australia. Gregory J. Daglish is a principal research scientist at the Department of Agriculture and Fisheries, in Queensland, and is affiliated with the CRC. David W. Hagstrum is a professor in the Department of Entomology at KSU. John F. Leslie is a university distinguished professor in the Department of Plant Pathology at KSU and is affiliated with the CRC. Thomas W. Phillips is Professor Donald A. Wilbur, Sr. Endowed Professor in Stored-Product Protection in the Department of Entomology at KSU and is affiliated with the CRC. Caterina Scoglio is a professor in the Department of Electrical and Computer Engineering at KSU and is affiliated with the CRC. Sara Thomas-Sharma was a postdoctoral research associate in the Department of Plant Pathology at KSU and is currently in the Department of Plant Pathology at the University of Wisconsin-Madison. Gimme H. Walter is a professor in the School of Biological Sciences at the University of Queensland and is affiliated with the CRC. Karen A. Garrett ( ) is a preeminent professor in the Institute for Sustainable Food Systems and Plant Pathology Department at UF, is affiliated with the CRC, and was formerly a professor in the Department of Plant Pathology at KSU
| | - Caterina Scoglio
- John F. Hernandez Nopsa ( ) is a postdoctoral research associate in the Institute for Sustainable Food Systems and the Plant Pathology Department at the University of Florida (UF), in Gainesville, and was formerly a postdoctoral research associate in the Department of Plant Pathology at Kansas State University (KSU), in Manhattan, and affiliated with the Plant Biosecurity Cooperative Research Centre (CRC), in Canberra, Australia. Gregory J. Daglish is a principal research scientist at the Department of Agriculture and Fisheries, in Queensland, and is affiliated with the CRC. David W. Hagstrum is a professor in the Department of Entomology at KSU. John F. Leslie is a university distinguished professor in the Department of Plant Pathology at KSU and is affiliated with the CRC. Thomas W. Phillips is Professor Donald A. Wilbur, Sr. Endowed Professor in Stored-Product Protection in the Department of Entomology at KSU and is affiliated with the CRC. Caterina Scoglio is a professor in the Department of Electrical and Computer Engineering at KSU and is affiliated with the CRC. Sara Thomas-Sharma was a postdoctoral research associate in the Department of Plant Pathology at KSU and is currently in the Department of Plant Pathology at the University of Wisconsin-Madison. Gimme H. Walter is a professor in the School of Biological Sciences at the University of Queensland and is affiliated with the CRC. Karen A. Garrett ( ) is a preeminent professor in the Institute for Sustainable Food Systems and Plant Pathology Department at UF, is affiliated with the CRC, and was formerly a professor in the Department of Plant Pathology at KSU
| | - Sara Thomas-Sharma
- John F. Hernandez Nopsa ( ) is a postdoctoral research associate in the Institute for Sustainable Food Systems and the Plant Pathology Department at the University of Florida (UF), in Gainesville, and was formerly a postdoctoral research associate in the Department of Plant Pathology at Kansas State University (KSU), in Manhattan, and affiliated with the Plant Biosecurity Cooperative Research Centre (CRC), in Canberra, Australia. Gregory J. Daglish is a principal research scientist at the Department of Agriculture and Fisheries, in Queensland, and is affiliated with the CRC. David W. Hagstrum is a professor in the Department of Entomology at KSU. John F. Leslie is a university distinguished professor in the Department of Plant Pathology at KSU and is affiliated with the CRC. Thomas W. Phillips is Professor Donald A. Wilbur, Sr. Endowed Professor in Stored-Product Protection in the Department of Entomology at KSU and is affiliated with the CRC. Caterina Scoglio is a professor in the Department of Electrical and Computer Engineering at KSU and is affiliated with the CRC. Sara Thomas-Sharma was a postdoctoral research associate in the Department of Plant Pathology at KSU and is currently in the Department of Plant Pathology at the University of Wisconsin-Madison. Gimme H. Walter is a professor in the School of Biological Sciences at the University of Queensland and is affiliated with the CRC. Karen A. Garrett ( ) is a preeminent professor in the Institute for Sustainable Food Systems and Plant Pathology Department at UF, is affiliated with the CRC, and was formerly a professor in the Department of Plant Pathology at KSU
| | - Gimme H Walter
- John F. Hernandez Nopsa ( ) is a postdoctoral research associate in the Institute for Sustainable Food Systems and the Plant Pathology Department at the University of Florida (UF), in Gainesville, and was formerly a postdoctoral research associate in the Department of Plant Pathology at Kansas State University (KSU), in Manhattan, and affiliated with the Plant Biosecurity Cooperative Research Centre (CRC), in Canberra, Australia. Gregory J. Daglish is a principal research scientist at the Department of Agriculture and Fisheries, in Queensland, and is affiliated with the CRC. David W. Hagstrum is a professor in the Department of Entomology at KSU. John F. Leslie is a university distinguished professor in the Department of Plant Pathology at KSU and is affiliated with the CRC. Thomas W. Phillips is Professor Donald A. Wilbur, Sr. Endowed Professor in Stored-Product Protection in the Department of Entomology at KSU and is affiliated with the CRC. Caterina Scoglio is a professor in the Department of Electrical and Computer Engineering at KSU and is affiliated with the CRC. Sara Thomas-Sharma was a postdoctoral research associate in the Department of Plant Pathology at KSU and is currently in the Department of Plant Pathology at the University of Wisconsin-Madison. Gimme H. Walter is a professor in the School of Biological Sciences at the University of Queensland and is affiliated with the CRC. Karen A. Garrett ( ) is a preeminent professor in the Institute for Sustainable Food Systems and Plant Pathology Department at UF, is affiliated with the CRC, and was formerly a professor in the Department of Plant Pathology at KSU
| | - Karen A Garrett
- John F. Hernandez Nopsa ( ) is a postdoctoral research associate in the Institute for Sustainable Food Systems and the Plant Pathology Department at the University of Florida (UF), in Gainesville, and was formerly a postdoctoral research associate in the Department of Plant Pathology at Kansas State University (KSU), in Manhattan, and affiliated with the Plant Biosecurity Cooperative Research Centre (CRC), in Canberra, Australia. Gregory J. Daglish is a principal research scientist at the Department of Agriculture and Fisheries, in Queensland, and is affiliated with the CRC. David W. Hagstrum is a professor in the Department of Entomology at KSU. John F. Leslie is a university distinguished professor in the Department of Plant Pathology at KSU and is affiliated with the CRC. Thomas W. Phillips is Professor Donald A. Wilbur, Sr. Endowed Professor in Stored-Product Protection in the Department of Entomology at KSU and is affiliated with the CRC. Caterina Scoglio is a professor in the Department of Electrical and Computer Engineering at KSU and is affiliated with the CRC. Sara Thomas-Sharma was a postdoctoral research associate in the Department of Plant Pathology at KSU and is currently in the Department of Plant Pathology at the University of Wisconsin-Madison. Gimme H. Walter is a professor in the School of Biological Sciences at the University of Queensland and is affiliated with the CRC. Karen A. Garrett ( ) is a preeminent professor in the Institute for Sustainable Food Systems and Plant Pathology Department at UF, is affiliated with the CRC, and was formerly a professor in the Department of Plant Pathology at KSU
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16
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Germinara G, Conte A, Lecce L, Di Palma A, Contò F, Del Nobile M. Controlled Release of Propionic Acid and (E
)-2-Hexenal Against S
itophilus Granarius
(L.) (Coleoptera: Curculionidae). J FOOD PROCESS PRES 2014. [DOI: 10.1111/jfpp.12212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- G.S. Germinara
- Department of Agricultural Sciences; Food and Environment; University of Foggia; Foggia Italy
| | - A. Conte
- Department of Agricultural Sciences; Food and Environment; University of Foggia; Foggia Italy
| | - L. Lecce
- Department of Agricultural Sciences; Food and Environment; University of Foggia; Foggia Italy
| | - A. Di Palma
- Department of Agricultural Sciences; Food and Environment; University of Foggia; Foggia Italy
| | - F. Contò
- Department of Economics; University of Foggia; Foggia Italy
| | - M.A. Del Nobile
- Department of Agricultural Sciences; Food and Environment; University of Foggia; Foggia Italy
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17
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Shi M, Collins PJ, Ridsdill-Smith TJ, Emery RN, Renton M. Dosage consistency is the key factor in avoiding evolution of resistance to phosphine and population increase in stored-grain pests. PEST MANAGEMENT SCIENCE 2013; 69:1049-1060. [PMID: 23292953 DOI: 10.1002/ps.3457] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2012] [Revised: 09/14/2012] [Accepted: 11/01/2012] [Indexed: 06/01/2023]
Abstract
BACKGROUND Control of pests in stored grain and the evolution of resistance to pesticides are serious problems worldwide. A stochastic individual-based two-locus model was used to investigate the impact of two important issues, the consistency of pesticide dosage through the storage facility and the immigration rate of the adult pest, on overall population control and avoidance of evolution of resistance to the fumigant phosphine in an important pest of stored grain, the lesser grain borer. RESULTS A very consistent dosage maintained good control for all immigration rates, while an inconsistent dosage failed to maintain control in all cases. At intermediate dosage consistency, immigration rate became a critical factor in whether control was maintained or resistance emerged. CONCLUSION Achieving a consistent fumigant dosage is a key factor in avoiding evolution of resistance to phosphine and maintaining control of populations of stored-grain pests; when the dosage achieved is very inconsistent, there is likely to be a problem regardless of immigration rate.
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Affiliation(s)
- Mingren Shi
- School of Plant Biology, FNAS, The University of Western Australia, Crawley, WA, Australia.
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18
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Modelling mortality of a stored grain insect pest with fumigation: Probit, logistic or Cauchy model? Math Biosci 2013; 243:137-46. [DOI: 10.1016/j.mbs.2013.02.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2012] [Revised: 01/27/2013] [Accepted: 02/06/2013] [Indexed: 11/17/2022]
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19
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Germinara GS, De Cristofaro A, Rotundo G. Bioactivity of short-chain aliphatic ketones against adults of the granary weevil, Sitophilus granarius (L.). PEST MANAGEMENT SCIENCE 2012; 68:371-377. [PMID: 22081494 DOI: 10.1002/ps.2272] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 06/07/2011] [Accepted: 06/27/2011] [Indexed: 05/31/2023]
Abstract
BACKGROUND The granary weevil, Sitophilus granarius (L.), is one of the most damaging pests of stored grains, causing severe quantitative and qualitative losses. Sustainable control means, alternative to the commonly used fumigants and broad-spectrum contact insecticides, are urgently needed owing to legislative limits, the development of resistant insect strains and increasing consumer demand for safe food. Short-chain aliphatic ketones, known to be emitted by cereal grains and previously identified as repellents to adult granary weevils, were evaluated for their ability to disrupt insect orientation towards wheat grains and as possible natural fumigants. RESULTS In behavioural bioassays, 2-pentanone, 2-hexanone, 2-heptanone and 2,3-butanedione significantly reduced insect orientation towards odours of wheat grains, with 2-hexanone and 2-heptanone being the most active. In fumigation tests, all compounds were effective in killing weevil adults, but they performed differently according to chemical structure, speed of action and presence of wheat grains. In the presence of grains, the highest fumigant toxicity was shown by 2-pentanone (LC(50) = 8.4 ± 1.0 mg L(-1)) after 24 h exposure, and by 2-pentanone (LC(50) = 4.5 ± 0.3 mg L(-1)), 2-heptanone (LC(50) = 7.1 ± 0.3 mg L(-1) ) and 2-hexanone (LC(50) = 8.1 ± 0.6 mg L(-1)) 1 week after the treatment end. CONCLUSION Short-chain aliphatic ketones have potential for applications in IPM programmes for the granary weevil because of their behaviour-altering activity and fumigant toxicity.
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Affiliation(s)
- Giacinto S Germinara
- Department of Agroenvironmental Sciences, Chemistry and Plant Protection, University of Foggia, Foggia, Italy.
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20
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Formato A, Naviglio D, Pucillo GP, Nota G. Improved fumigation process for stored foodstuffs by using phosphine in sealed chambers. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:331-338. [PMID: 22133005 DOI: 10.1021/jf204323s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this paper we present an innovative device designed and constructed to improve the fumigation process for stored foodstuffs with the use of phosphine gas in sealed chambers. The device allowed a considerable reduction in phosphine production time (from about 5 to 7 days for traditional systems to 2 days for the equipment considered), maintaining the system below the inflammability threshold, and at the same time achieving the total exhaustion of aluminum (or magnesium) phosphide so as to avoid toxic residues at the end of the process. With the standard device currently available on the market, after the normal 5-7 day fumigating period, the powder residue contains as much as 1-2% (w/w) of phosphide. Thus the residues, according to current legislation, have to be considered toxic and harmful. To overcome this disadvantage, appropriate modifications were made to the cylindrical tray used for the fumigation process: a nebulizer was installed, which has the function of increasing the moisture of the air spreading around the phosphide pellets and allowing a more rapid reaction with phosphide. Moreover, the cylindrical tray was also heated by means of an electrical resistance, and temperature was checked by a thermostat, so as to always obtain the same efficiency, independently of outside temperature, for both hot and cold periods, since reaction speed depends on the system temperature considered. In addition, a control device for air saturation allows condensation processes to be avoided. Using the modified cylindrical tray we performed tests to determine the best values of humidity and temperature for the process concerned, avoiding phosphine concentrations that might result in a fire hazard, and the remixing of phosphide pellets inside the cylindrical tray. Our experimental data allowed us to obtain a mathematical model used to gain an insight into the process in question.
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Affiliation(s)
- Andrea Formato
- Department of Agricultural Engineering, University of Naples Federico II, via Università 100, 80055 Portici, Naples, Italy
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21
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Numerical algorithms for estimation and calculation of parameters in modeling pest population dynamics and evolution of resistance. Math Biosci 2011; 233:77-89. [DOI: 10.1016/j.mbs.2011.06.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2011] [Revised: 05/19/2011] [Accepted: 06/20/2011] [Indexed: 11/21/2022]
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22
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Athanassiou CG, Arthur FH, Throne JE. Efficacy of layer treatment with methoprene for control of Rhyzopertha dominica (Coleoptera: Bostrychidae) on wheat, rice and maize. PEST MANAGEMENT SCIENCE 2011; 67:380-384. [PMID: 21360643 DOI: 10.1002/ps.2064] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2010] [Revised: 08/26/2010] [Accepted: 09/14/2010] [Indexed: 05/30/2023]
Abstract
BACKGROUND Insect growth regulators are promising alternatives to traditional pesticides in stored grain. The efficacy of the juvenile hormone analogue methoprene was evaluated as a layer treatment in a laboratory experiment for control of Rhyzopertha dominica (F.) (Coleoptera: Bostrychidae) in wheat, rice and maize. RESULTS Adults of R. dominica were placed in vials containing 33, 26 and 29 g (to a depth of 6.5 cm) of wheat, rice and maize, respectively, that was entirely or partially treated with 1, 5 or 10 mg kg(-1) methoprene. In wheat and rice, the layer treatments were not as effective as the whole-grain treatment, but there was decreased progeny production as the application rate increased. However, on maize the partial treatments were as effective as the whole-grain treatment at 5 and 10 mg kg(-1) . CONCLUSIONS The results suggest that partial layer treatments with methoprene can be used to control R. dominica on maize but may not be effective for control of this species on wheat and rice.
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Affiliation(s)
- Christos G Athanassiou
- Laboratory of Entomology and Agricultural Zoology, Department of Agriculture, Crop Production and Rural Development, University of Thessaly, N. Ionia, Magnesia, Greece.
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