Evaluation of seed treatment insecticides for management of the rice water weevil,Lissorhoptrus oryzophilus Kuschel (Coleoptera: Curculionidae), in commercial rice fields in Louisiana |
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| Affiliation: | 1. Department of Orthopedic Surgery, Nagoya City University Graduate School of Medical Sciences, Nagoya 467-8601, Japan;2. Department of Pharmacology, Gifu University Graduate School of Medicine, Gifu 501-1194, Japan;3. Department of Clinical Laboratory, National Center for Geriatrics and Gerontology, Obu, Aichi 474-8511, Japan;1. Estación Experimental Agroindustrial Obispo Colombres (EEAOC), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Instituto de Tecnología Agroindustrial del Noroeste Argentino (ITANOA), Av. William Cross 3150, C.P. T4101XAC, 4101, Las Talitas, Tucumán, Argentina;2. Centro de Estudios Parasitológicos y de Vectores (CEPAVE), Universidad Nacional de La Plata, Calle 2 N° 584, 1900, La Plata, Argentina;3. Estación Experimental Agroindustrial Obispo Colombres (EEAOC), Argentina;1. UFZ—Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, 06120 Halle, Germany;2. iDiv, German Centre for Integrative Biodiversity Research, Halle-Jena-Leipzig, Deutscher Platz 5e, 04103 Leipzig, Germany;3. Sustainable Europe Research Institute SERI Germany e.V., Vorsterstr. 97–99, 51103 Cologne, Germany;4. IRRI—International Rice Research Institute, Los Baños, DAPO, 7777 Metro Manila, Philippines;5. Institute for Natural Resource Conservation, Kiel University, Olshausenstraße 40, 24098 Kiel, Germany;6. Leibniz Centre for Agricultural Landscape Research ZALF, Eberswalder Str. 84, 15374 Müncheberg, Germany;7. LEGATO Office, 3601 Banaue, Ifugao, Philippines;8. Ministry of Agriculture and Rural Development Vietnam, Tien Giang, Vietnam;9. Department of Development Communication, Visayas State University, Visca, Baybay 6521, Leyte, Philippines;10. OLANIS GmbH, Pittlerstraße 33, 04159 Leipzig, Germany;11. Tien Giang University, My Tho, Vietnam;12. General and Animal Ecology, Biology, Philipps-University Marburg, Karl-v.-Frisch-Str. 8, 35043 Marburg, Germany;13. Chair of Soil Science, Martin-Luther-University Halle-Wittenberg, Von-Seckendorff-Platz 3, 06120 Halle, Germany;14. Crop Protection Division, Philippine Rice Research Institute, Maligaya, Munoz, Nueva Ecija, Philippines;15. Institute for Geography and Geology, Ernst-Moritz-Arndt University Greifswald, Friedrich-Ludwig-Jahn-Str. 16, 17487 Greifswald, Germany;p. Agorecology, Georg-August University Göttingen, Grisebachstrasse 6, 37077 Göttingen, Germany;q. Zhejiang University, Hangzhou, PR China;1. School of Horticulture and Plant Protection & Institute of Applied Entomology, Yangzhou University, Yangzhou 225009, China;2. Joint International Research Laboratory of Agriculture and Agri-Product Safety, Ministry of Education, Yangzhou University, Yangzhou, China |
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| Abstract: | The rice water weevil, Lissorhoptrus oryzophilus Kuschel (Coleoptera: Curculionidae), is the most injurious insect pest in US rice production. Yield losses in excess of 25% can occur from severe infestations. Management demonstrations were conducted in the 2008, 2009, 2010, and 2011 growing seasons to evaluate the use of commercially available insecticides to control L. oryzophilus in commercial rice fields. The demonstration tests, conducted on farms throughout Louisiana, compared the efficacies of recently registered seed treatment insecticides to untreated controls and to foliar applications of pyrethroids. Efficacy was assessed by collecting root/soil core samples three to four weeks after application of permanent flood and counting numbers of larvae and pupae in core samples. Tests were replicated across locations in multiple rice-producing Louisiana parishes. Densities of larvae and pupae in core samples exceeded the larval threshold (three larvae or pupae per core sample) in over 80% of untreated plots/cuts, confirming the ubiquity and severity of this insect as a pest of rice. Use of chlorantraniliprole (Dermacor® X-100, DuPont™ Crop Protection, Wilmington, DE), thiamethoxam (CruiserMaxx® Rice, Syngenta® Crop Protection, Greensboro, NC), and clothianidin (NipsIt Inside®, Valent® USA Corporation, Walnut Creek, CA) seed treatments significantly reduced L. oryzophilus infestation compared to untreated checks. Fewer larvae and pupae were observed in rice treated with chlorantraniliprole than in rice treated with other insecticides. |
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| Keywords: | Rice water weevil Rice Integrated pest management Prophylactic seed treatments |
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