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Hayasaka D, Kato K, Hiraiwa MK, Kasai H, Osaki K, Aoki R, Sawahata T. Undesirable dispersal via a river pathway of a single Argentine ant supercolony newly invading an inland urban area of Japan. Sci Rep 2023; 13:21119. [PMID: 38036575 PMCID: PMC10689755 DOI: 10.1038/s41598-023-47734-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 11/17/2023] [Indexed: 12/02/2023] Open
Abstract
Invasive ants pose a risk to human well-being and social/ecosystem stability. Linepithema humile Mayr is among the most damaging invasive ants worldwide. Most L. humile populations invade ports/wharfs isolated from surrounding landscapes, but unfortunately, a new population was discovered in an inland urban area (Nara Prefecture) of Japan in 2021. In this study, first, the supercolony type of the Nara L. humile population was identified via a hostility test, and then its distribution pattern was characterized. In aggression tests between L. humile from Nara and four supercolonies (haplotypes LH1, LH2, LH3, LH4), this ant showed extremely strong hostility against all supercolonies exept LH2, which was detected only in Japan in its introduced range. In Nara, L. humile was abundant in and around the urban river. Simulations revealed that using this environment for movement/dispersal increased the annual dispersal ability by 14 times compared with that achieved via ground (125 m), as mentioned in the literature. Therefore, river channels can serve as major pathways of long-distance dispersal for L. humile invading inland urban areas. Since applying chemical strategies around rivers is problematic, preventing L. humile from moving to rivers from initial invasion sites is crucial.
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Affiliation(s)
- Daisuke Hayasaka
- Faculty of Agriculture, Kindai University, Nakamachi 3327-204, Nara, 631-8505, Japan.
| | - Kenshin Kato
- Faculty of Agriculture, Kindai University, Nakamachi 3327-204, Nara, 631-8505, Japan
- Fukui River and National Highway Office, Ministry of Land, Infrastructure, Transport and Tourism, Hanando-minami 2-14-7, Fukui, 918-8015, Japan
| | - Masayoshi K Hiraiwa
- Faculty of Agriculture, Kindai University, Nakamachi 3327-204, Nara, 631-8505, Japan.
| | - Hiro Kasai
- Graduate School of Agriculture, Kindai University, Nakamachi 3327-204, Nara, 631-8505, Japan
| | - Kazutaka Osaki
- Graduate School of Agriculture, Kindai University, Nakamachi 3327-204, Nara, 631-8505, Japan
| | - Retsushi Aoki
- Graduate School of Agriculture, Kindai University, Nakamachi 3327-204, Nara, 631-8505, Japan
| | - Takuo Sawahata
- Faculty of Agriculture, Kindai University, Nakamachi 3327-204, Nara, 631-8505, Japan
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Nkontcheu Kenko DB, Ngameni NT, Kamta PN. Environmental assessment of the influence of pesticides on non-target arthropods using PRIMET, a pesticide hazard model, in the Tiko municipality, Southwest Cameroon. CHEMOSPHERE 2022; 308:136578. [PMID: 36162518 DOI: 10.1016/j.chemosphere.2022.136578] [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: 07/02/2022] [Revised: 09/04/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Pesticide use in farming is unescapable to enhance the harvest and prevent deleterious organisms. Unfortunately, certain pesticide users most often unveil poor practices, remarkably in developing countries. This study aimed at estimating pesticide risk to non-target arthropods (NTAs) using PRIMET (Pesticide Risks in the Tropics to Man, Environment and Trade), a pesticide risk model, in the Tiko municipality, Southwest Cameroon. To achieve this, data was assembled on the pesticide treatment plan (active ingredient, crops, dosage, number of applications, application interval) and ecotoxicological properties (LR50), and typeset one at the time in PRIMET 2.0 for risk appraisal. The model estimated the Acceptable Effect Concentration (AECNTA), the In-Field and Off-Field Exposure (PEC) and Exposure Toxicity Ratio (ETR = PEC/AECNTA). If ETR < 1, there is "No Risk", if 1 ≤ ETR≤ 100, there is a "Possible Risk", and if ETR > 100, there is a "Definite Risk". Amongst the thirty-nine (39) pesticides evaluated, the most dangerous compound was imidacloprid (ETRIF = 255 000 000), followed by cypermethrin (ETRIF = 299 800) and oxamyl (ETRIF = 57 917). Epoxiconazole was the only fungicide, out of fourteen predicted to pose a definite in-field risk to NTAs with ETRIF = 1491. Half of the fungicides (50%) posed a possible in-field risk. One third of herbicides evaluated posed a possible in-field risk to NTAs. In this classification, paraquat (ETRIF = 51) exhibited the highest risk. All the herbicides were predicted for no off-field risk to NTAs. NTAs seemed to be more tolerant to most fungicides and herbicides than insecticides. The strengthening of the directive on pesticide purchasing and operation is inevitability in order to protect anthropoid and environmental health.
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Affiliation(s)
| | | | - Parfait Nkontcheu Kamta
- Department of Forestry, Faculty of Agronomy and Agricultural Sciences, University of Dschang, Cameroon
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3
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Hayasaka D, Hiraiwa MK, Maebara Y, Seko Y. Acute toxicity of fipronil to an invasive ant, Lepisiota frauenfeldi. JOURNAL OF PESTICIDE SCIENCE 2022; 47:208-212. [PMID: 36514688 PMCID: PMC9716042 DOI: 10.1584/jpestics.d22-049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 10/10/2022] [Indexed: 06/17/2023]
Abstract
Slow-acting fipronil is one of the best components for controlling invasive ants. However, its efficacy against invasive Lepisiota frauenfeldi, which recently invaded Japan, remains unclear. Here, its acute toxicity to Le. frauenfeldi was assessed, and its lethal concentrations were compared with those against other invasive ants (Linepithema humile and Solenopsis invicta). The LC10 and LC50 values of fipronil for Le. frauenfeldi were significantly lower than the previously reported values for Li. humile and/or S. invicta, and its LC90 value against Le. frauenfeldi was in the same range as that required for Li. humile extermination. Additionally, Le. frauenfeldi can be more sensitive to fipronil than non-target arthropods. Therefore, recent fipronil-based Li. humile and S. invicta eradication/control programs may be effective against Le. frauenfeldi as well. Moreover, applying fipronil at dosages appropriate for Le. frauenfeldi would lead to effective Le. frauenfeldi extermination/control with low damage to other native species/ants.
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Affiliation(s)
| | | | - Yu Maebara
- Graduate School of Agriculture, Kindai University
| | - Yugo Seko
- Graduate School of Agriculture, Kindai University
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Yasudai R, Matsubara A, Hsu PW, Lee CC, Lin CC, Scotty Yang CC. Laboratory and Field Evaluations of Two Bait Formulations Against the Invasive Fire Ant, Solenopsis invicta (Hymenoptera: Formicidae). JOURNAL OF ECONOMIC ENTOMOLOGY 2022; 115:624-630. [PMID: 35022766 DOI: 10.1093/jee/toab255] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Indexed: 06/14/2023]
Abstract
The red imported fire ant, Solenopsis invicta Buren, was first discovered in Japan in 2017. As this ant remains at the early invasion stage, efforts in establishing a rapid-response framework, such as evaluating available control methods, are urgently needed. Despite the presence of numerous household insecticides against invasive/household pest ants in Japan, the effects of these products on fire ants remain poorly understood. This study assessed the efficacy of two bait products designed to target common household ant pests in Japan on S. invicta through under laboratory and field conditions in Taiwan. The two baits are Arino-su-korori (AK), a granule-formulated bait product with hydramethylnon as an active ingredient (A.I.), and Hyper Arino-su-korori (HAK), a paste-formulated bait with fipronil as A.I., respectively. We showed that both AK and HAK resulted in more than 99% mortalities of fire ant within 8 wk under laboratory conditions and significantly reduce fire ants' foraging activities in the field. AK generally performed slightly better than HAK in terms of the time required to achieve total laboratory colony elimination and also long-term suppression of field fire ants. Such differences most likely are attributable to the active ingredient's mode of action and/or formulation and their interactions with fire ant biology. This study demonstrates the feasibility of the two bait products in effectively controlling laboratory and field fire ants, thus representing a promising candidate pest management tool to cope with ongoing/future fire ant invasions in Japan.
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Affiliation(s)
- Rino Yasudai
- Research Laboratories, Earth Corporation, 3218-12, Sakoshi, Ako, Hyogo 678-0192, Japan
| | - Akira Matsubara
- Research Laboratories, Earth Corporation, 3218-12, Sakoshi, Ako, Hyogo 678-0192, Japan
| | - Po-Wei Hsu
- Department of Biology, National Changhua University of Education, Changhua 50007, Taiwan
| | - Ching-Chen Lee
- Department of Biology, National Changhua University of Education, Changhua 50007, Taiwan
| | - Chung-Chi Lin
- Department of Biology, National Changhua University of Education, Changhua 50007, Taiwan
| | - Chin-Cheng Scotty Yang
- Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto 611-0011, Japan
- Department of Entomology, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
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Hayasaka D, Nakamori T, Tamaue K, Seko Y, Hashimoto K, Sawahata T. Dry-Heat Tolerance of Egg Sacs of Invasive Latrodectus Spiders (Araneae: Theridiidae) in Japan: Implications for Efficient Control/Extermination. JOURNAL OF ECONOMIC ENTOMOLOGY 2021; 114:2460-2465. [PMID: 34622929 DOI: 10.1093/jee/toab189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Indexed: 06/13/2023]
Abstract
Strategic responses to invasive Latrodectus widow spiders are a global challenge due to the risks they pose to health and ecosystems. Chemical strategies involving the use of pyrethroids are effective against adult spiders, but as their populations rebound, chemical control becomes costly and unsustainable for eradication. A major obstacle is the inefficacy of insecticides against eggs, which are covered by a protective silk egg sac. Eradication of invasive spiders must focus on destroying progeny. Here, the responses of eggs in egg sacs of two invasive Latrodectus spiders in Japan (Latrodectus hasseltii (Thorell) and Latrodectus geometricus (C.L. Koch)) to short-term dry-heat exposure were examined. To test whether the dry-heat tolerance of the egg sacs of both spider species differed, lethal temperature (LT) was determined based on the hatching rate of eggs from egg sacs subjected to a range of temperatures. Hatching in both species failed completely when the egg sacs were exposed to temperatures of 55°C and above for 10 min, but the LT to reduce hatching by 90% (LT90) differed significantly between L. hasseltii (50. 9°C) and L. geometricus (52. 8°C). Our study highlights the efficacy of dry heat in suppressing hatching and thus shows the possibility for effective extermination of these noxious invasive pests. Further exploration and investigation of the effects of humidity and heat exposure time on egg sacs under field conditions are needed to guide Latrodectus spider control strategies.
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Affiliation(s)
- Daisuke Hayasaka
- Graduate School of Agriculture, Kindai University, Nakamachi 3327-204, Nara 631-8505, Japan
| | - Takuya Nakamori
- Graduate School of Agriculture, Kindai University, Nakamachi 3327-204, Nara 631-8505, Japan
| | - Kazunori Tamaue
- Research & Development Center, Toa Corporation , Anzencho 1-3, Tsurumi-ku, Yokohama, Kanagawa 230-0035, Japan
| | - Yugo Seko
- Graduate School of Agriculture, Kindai University, Nakamachi 3327-204, Nara 631-8505, Japan
| | - Koya Hashimoto
- Biodiversity Division, National Institute for Environmental Studies (NIES), Onogawa 16-2, Tsukuba, Ibaraki 305-8506, Japan
| | - Takuo Sawahata
- Graduate School of Agriculture, Kindai University, Nakamachi 3327-204, Nara 631-8505, Japan
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Pisa L, Goulson D, Yang EC, Gibbons D, Sánchez-Bayo F, Mitchell E, Aebi A, van der Sluijs J, MacQuarrie CJK, Giorio C, Long EY, McField M, Bijleveld van Lexmond M, Bonmatin JM. An update of the Worldwide Integrated Assessment (WIA) on systemic insecticides. Part 2: impacts on organisms and ecosystems. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:11749-11797. [PMID: 29124633 PMCID: PMC7921077 DOI: 10.1007/s11356-017-0341-3] [Citation(s) in RCA: 110] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 09/25/2017] [Indexed: 05/15/2023]
Abstract
New information on the lethal and sublethal effects of neonicotinoids and fipronil on organisms is presented in this review, complementing the previous Worldwide Integrated Assessment (WIA) in 2015. The high toxicity of these systemic insecticides to invertebrates has been confirmed and expanded to include more species and compounds. Most of the recent research has focused on bees and the sublethal and ecological impacts these insecticides have on pollinators. Toxic effects on other invertebrate taxa also covered predatory and parasitoid natural enemies and aquatic arthropods. Little new information has been gathered on soil organisms. The impact on marine and coastal ecosystems is still largely uncharted. The chronic lethality of neonicotinoids to insects and crustaceans, and the strengthened evidence that these chemicals also impair the immune system and reproduction, highlights the dangers of this particular insecticidal class (neonicotinoids and fipronil), with the potential to greatly decrease populations of arthropods in both terrestrial and aquatic environments. Sublethal effects on fish, reptiles, frogs, birds, and mammals are also reported, showing a better understanding of the mechanisms of toxicity of these insecticides in vertebrates and their deleterious impacts on growth, reproduction, and neurobehaviour of most of the species tested. This review concludes with a summary of impacts on the ecosystem services and functioning, particularly on pollination, soil biota, and aquatic invertebrate communities, thus reinforcing the previous WIA conclusions (van der Sluijs et al. 2015).
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Affiliation(s)
| | - Dave Goulson
- School of Life Sciences, University of Sussex, Brighton, BN1 9QG, UK
| | - En-Cheng Yang
- Department of Entomology, National Taiwan University, Taipei, Taiwan
| | - David Gibbons
- RSPB Centre for Conservation of Science, The Lodge, Sandy, Bedfordshire, SG19 2DL, UK
| | - Francisco Sánchez-Bayo
- School of Life and Environmental Sciences, The University of Sydney, 1 Central Avenue, Eveleigh, NSW, 2015, Australia
| | - Edward Mitchell
- Laboratory of Soil Biodiversity, University of Neuchâtel, Rue Emile-Argand 11, 2000, Neuchâtel, Switzerland
| | - Alexandre Aebi
- Laboratory of Soil Biodiversity, University of Neuchâtel, Rue Emile-Argand 11, 2000, Neuchâtel, Switzerland
- Anthropology Institute, University of Neuchâtel, Rue Saint-Nicolas 4, 2000, Neuchâtel, Switzerland
| | - Jeroen van der Sluijs
- Centre for the Study of the Sciences and the Humanities, University of Bergen, Postboks 7805, 5020, Bergen, Norway
- Department of Chemistry, University of Bergen, Postboks 7805, 5020, Bergen, Norway
- Copernicus Institute of Sustainable Development, Environmental Sciences, Utrecht University, Heidelberglaan 2, 3584 CS, Utrecht, The Netherlands
| | - Chris J K MacQuarrie
- Natural Resources Canada, Canadian Forest Service, 1219 Queen St. East, Sault Ste. Marie, ON, P6A 2E5, Canada
| | | | - Elizabeth Yim Long
- Department of Entomology, The Ohio State University, 1680 Madison Ave, Wooster, OH, 44691, USA
| | - Melanie McField
- Smithsonian Institution, 701 Seaway Drive Fort Pierce, Florida, 34949, USA
| | | | - Jean-Marc Bonmatin
- Centre National de la Recherche Scientifique (CNRS), Centre de Biophysique Moléculaire, Rue Charles Sadron, 45071, Orléans, France.
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Hayasaka D, Numa T, Sawahata T. Differences in Bifenthrin and Fipronil Susceptibility Among Invasive Latrodectus spp. (Araneae: Theridiidae) and Nontarget Spiders in Japan. JOURNAL OF ECONOMIC ENTOMOLOGY 2021; 114:257-264. [PMID: 33399203 DOI: 10.1093/jee/toaa293] [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: 10/15/2020] [Indexed: 06/12/2023]
Abstract
Prompt responses to invasive Latrodectus spiders introduced unintentionally are needed worldwide due to their medical and ecological importance. Latrodectus species are chemically controlled using pyrethroid insecticides despite concerns about the ecological impacts of these compounds on biodiversity/ecosystems. Here, the relative sensitivities (acute toxicity: 48-h LC50) of Latrodectus hasseltii Thorell and Latrodectus geometricus C.L. Koch from Japan to the conventional neurotoxic insecticide bifenthrin (pyrethroid) and a new candidate insecticide, fipronil (phenylpyrazole), were examined. Acute residual toxicity tests of these compounds in two nontarget spiders (Parasteatoda tepidariorum C.L. Koch (Araneae: Theridiidae), Badumna insignis L. Koch (Araneae: Desidae)) were conducted for comparison. To test whether bifenthrin and fipronil toxicities differed among the four spiders, corresponding species sensitivity distributions (SSDs) were compared, and hazardous concentrations were determined. Sensitivity (especially in the nontarget species) was two to four orders of magnitude higher for bifenthrin than for fipronil. The SSD patterns of the two insecticides differed significantly, with the spider communities being more sensitive to bifenthrin than to fipronil. The lethal bifenthrin concentration for Latrodectus may reduce spider populations by over 70-90%. If L. hasseltii (established throughout Japan) is targeted for effective population suppression rather than L. geometricus (with a limited distribution range) using the specified insecticide concentration (LC50 value) for fipronil, less than 20% of spider communities will be impacted. Chemical operations aimed at the effective population management and subsequent eradication of invasive Latrodectus spiders while supporting local biodiversity conservation would benefit from considerations of fipronil dosages and target species sensitivities.
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Affiliation(s)
- Daisuke Hayasaka
- Faculty of Agriculture, Kindai University, Nakamachi, Nara, Japan
| | - Tomoki Numa
- Faculty of Agriculture, Kindai University, Nakamachi, Nara, Japan
| | - Takuo Sawahata
- Faculty of Agriculture, Kindai University, Nakamachi, Nara, Japan
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Seko Y, Hashimoto K, Koba K, Hayasaka D, Sawahata T. Intraspecific differences in the invasion success of the Argentine ant Linepithema humile Mayr are associated with diet breadth. Sci Rep 2021; 11:2874. [PMID: 33536543 PMCID: PMC7859199 DOI: 10.1038/s41598-021-82464-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 01/20/2021] [Indexed: 01/30/2023] Open
Abstract
The Argentine ant, Linepithema humile Mayr, has spread to almost all continents. In each introduced region, L. humile often forms a single large colony (supercolony), the members of which share the haplotype "LH1", despite the presence of other supercolonies with different genetic structures. However, the mechanisms underlying the successful invasion of LH1 ants are unclear. Here, we examined whether diet breadth differs between more successful (LH1) and less successful (LH2, LH3, LH4) L. humile supercolonies in Japan to better understand the processes responsible for invasion success. The standard ellipse areas (SEAs) of δ13C and δ15N and their ranges (CR and NR) were used as diet breadth indices. The SEAs of LH1 were much larger than those of the less successful supercolonies despite no differences in the baseline SEAs of arthropods within the supercolony habitats, indicating that the invasion success of a supercolony is associated with its diet breadth. Furthermore, LH1 had a broader CR than the other supercolonies, suggesting that which might be derived from superior resource exploitation ability. Our study highlights the importance of focusing on intraspecific differences in diet breadth among supercolonies when assessing organisms that can potentially invade and become dominant in new habitats.
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Affiliation(s)
- Yugo Seko
- Graduate School of Agriculture, Kindai University, Nakamachi 3327-204, Nara, 631-8505, Japan.
| | - Koya Hashimoto
- Faculty of Agriculture, Kindai University, Nakamachi 3327-204, Nara, 631-8505, Japan
- National Institute for Environmental Studies (NIES), Onogawa 16-2, Tsukuba, Ibaraki, 305-8506, Japan
| | - Keisuke Koba
- Center for Ecological Research (CER), Kyoto University, Hirano 2-509-3, Otsu, Shiga, 520-2113, Japan
| | - Daisuke Hayasaka
- Graduate School of Agriculture, Kindai University, Nakamachi 3327-204, Nara, 631-8505, Japan.
| | - Takuo Sawahata
- Graduate School of Agriculture, Kindai University, Nakamachi 3327-204, Nara, 631-8505, Japan
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Gochnour BM, Suiter DR, Davis JW, Huang Q. Use of an Argentine Ant, Linepithema humile, Semiochemical to Deliver an Acute Toxicant. INSECTS 2018; 9:insects9040171. [PMID: 30477124 PMCID: PMC6315350 DOI: 10.3390/insects9040171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 11/15/2018] [Accepted: 11/16/2018] [Indexed: 11/29/2022]
Abstract
The Argentine ant, Linepithema humile, is an invasive nuisance, agricultural, and ecological pest from South America. In the United States, its primary distribution is in California and the Southeast. The structural pest control industry responds to property owner complaints when this ant’s populations become problematic and a persistent nuisance. Actions taken to control Argentine ants in the urban and suburban environment are typically complaint-driven, and often involve the application of insecticide sprays applied to the outdoor environment by professional pest managers. In California, and elsewhere, spray treatments of various residual insecticides by property owners and pest management professionals has resulted in significant runoff and in subsequent surface water contamination. As a result, an immediate need exists to develop alternative methods of ant control targeted at reducing environmental contamination. The purpose of this study was to investigate the potential for the development of an alternative method of toxicant delivery focused on the Argentine ant’s behavior modifying cuticular chemistry. In short, methanol and hexane washes of Argentine ant pupae applied to paper dummies were handled significantly more by worker ants than the paper dummies that did not contain the solvent extracts. Additionally, paper wicks soaked in a methylene chloride wash from Argentine ant cadavers, air dried, and then treated with fipronil, were removed by worker ants and placed on a midden pile at the same rate (≈86% to 99% removal at 1 h) as untreated and fipronil-treated ant cadavers. The paper wicks that did not contain the methylene chloride extract were ignored by the worker ants. After three days, the mortality of the ants exposed to the fipronil-treated wicks or the ant cadavers were dose-related. In conclusion, our study suggests that there is potential for the use of ant semiochemicals for the delivery of acute toxicants.
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Affiliation(s)
- Benjamin M Gochnour
- Department of Entomology, University of Georgia, 120 Cedar Street, Athens, GA 30602, USA.
| | - Daniel R Suiter
- Department of Entomology, University of Georgia Griffin Camus, 1109 Experiment Street, Griffin, GA 30223, USA.
| | - Jerry W Davis
- Experimental Statistics, College of Agricultural and Environmental Sciences, University of Georgia, 1109 Experiment Street, Griffin, GA 30223, USA.
| | - Qingguo Huang
- Department of Crop and Soil Sciences, University of Georgia Griffin Campus, 1109 Experiment Street, Griffin, GA 30223, USA.
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Seko Y, Hayasaka D, Nishino A, Uchida T, Sánchez-Bayo F, Sawahata T. Host-Tree Selection by the Invasive Argentine Ant (Hymenoptera: Formicidae) in Relation to Honeydew-Producing Insects. JOURNAL OF ECONOMIC ENTOMOLOGY 2018; 111:319-326. [PMID: 29329403 DOI: 10.1093/jee/tox351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The Argentine ant, Linepithema humile (Mayr; Hymenoptera: Formicidae), is one of the world's most hazardous invasive species, and thus its eradication from Japan is important. Physical and chemical controls can be expensive and cause strong adverse effects on local terrestrial ecosystems regardless of their high efficacy. Here, presence/absence of host-tree selection by Argentine ants was investigated to understand the ant-honeydew-producing insects interactions in order to develop new cultural controls compatible with biodiversity conservation. Abundance of Argentine ants and their tree utilization ratio was measured among dominant roadside trees (Cinnamomum camphora, Myrica rubra, Nerium indicum, Rhaphiolepis indica var. umbellata, Juniperus chinensis var. kaizuka) in two areas around Kobe, Japan. Almost all ants collected were Argentine ants suggesting that native ants would have been competitively excluded. Tree utilization of Argentine ants clearly differed among host trees. Abundance of both Argentine ants and honeydew-producing insects and tree utilization rate of the ants were significantly lower in especially C. camphora and J. chinensis. Few Argentine ants were observed trailing on C. camphora, J. Chinensis, and N. indicum, most probably due to low abundance of honeydew-producing insects on these trees with the toxic and repellent chemical components. On the other hand, high abundance of both Argentine ants and homopterans were found in M. rubra and especially R. indica. We suggest that reductions of R. indica and M. rubra would lead to a decrease in abundance of honeydew-producing insects, and thus effectively control populations of Argentine ants. At the same time, planting of C. camphora, J. Chinensis, and N. indicum may also play a role in restraint efficacy against invasion of the invasive ants.
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Affiliation(s)
- Yugo Seko
- Graduate School of Agriculture, Kindai University, Nakamachi, Nara, Japan
| | - Daisuke Hayasaka
- Graduate School of Agriculture, Kindai University, Nakamachi, Nara, Japan
| | - Atsushi Nishino
- Graduate School of Agriculture, Kindai University, Nakamachi, Nara, Japan
| | - Taizo Uchida
- Faculty of Engineering, Kyushu Sangyo University, Higashi-ku, Matsukadai, Fukuoka, Japan
| | - Francisco Sánchez-Bayo
- School of Life & Environmental Sciences, The University of Sydney, Biomedical building, Eveleigh, NSW, Australia
| | - Takuo Sawahata
- Graduate School of Agriculture, Kindai University, Nakamachi, Nara, Japan
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11
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Fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer. Sci Rep 2016; 6:23055. [PMID: 26979488 PMCID: PMC4793285 DOI: 10.1038/srep23055] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 02/25/2016] [Indexed: 12/02/2022] Open
Abstract
Several reports suggested that rice seedling nursery-box application of some systemic insecticides (neonicotinoids and fipronil) is the cause of the decline in dragonfly species noted since the 1990s in Japan. We conducted paddy mesocosm experiments to investigate the effect of the systemic insecticides clothianidin, fipronil and chlorantraniliprole on rice paddy field biological communities. Concentrations of all insecticides in the paddy water were reduced to the limit of detection within 3 months after application. However, residuals of these insecticides in the paddy soil were detected throughout the experimental period. Plankton species were affected by clothianidin and chlorantraniliprole right after the applications, but they recovered after the concentrations decreased. On the other hand, the effects of fipronil treatment, especially on Odonata, were larger than those of any other treatment. The number of adult dragonflies completing eclosion was severely decreased in the fipronil treatment. These results suggest that the accumulation of these insecticides in paddy soil reduces biodiversity by eliminating dragonfly nymphs, which occupy a high trophic level in paddy fields.
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