Lethal and sublethal effects of two new insecticides spirotetramat and flupyradifurone in comparison to conventional insecticide deltamethrin on Trichogramma evanescens (Hymenoptera: Trichogrammatidae) |
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| Affiliation: | 1. Department of Plant Protection, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran;2. Department of Plant Protection, Faculty of Agriculture, Persian Gulf University, Bushehr, Iran;1. Department of Plant Protection, College of Horticulture and Landscape, Tianjin Agricultural University, 22 Jinjing Road, Tianjin 300384, China;2. Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China;3. Tianjin Institute of Plant Protection, Tianjin Academy of Agricultural Sciences, Tianjin 300384, China;4. Institute of Entomology, College of Life Sciences, Nankai University, 94 Weijin Road, Tianjin 300071, China;5. South Australian Museum, Department of Terrestrial Invertebrates, Adelaide, SA 5000, Australia;1. Medical Entomology Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, PO Box 983, Phnom Penh, Cambodia;2. Virology Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, PO Box 983, Phnom Penh, Cambodia;3. Epidemiology and Public Health Unit, Institut Pasteur du Cambodge, Institut Pasteur International Network, PO Box 983, Phnom Penh, Cambodia;4. UMR ASTRE, CIRAD, INRAE, Université de Montpellier, Montpellier, France;5. UMR EPIA, VetAgro Sup, INRAE, Marcy l''étoile, France;1. The Botanical Gardens, Graduate School of Science, The University of Tokyo, Tokyo 112–0001, Japan;2. Department of Applied Entomology, Faculty of Agriculture, Alexandria University, Alexandria, Egypt;3. Department of Entomology, National Chung Hsing University, Taichung, Taiwan;4. Laboratory of Systems Ecology, Faculty of Agriculture, Saga University, Saga 840–8502, Japan;1. Entomology Research Museum, Department of Entomology, University of California, Riverside, CA 92521, USA;2. Applied Zoology Division, Taiwan Agricultural Research Institute, Council of Agriculture, Executive Yuan, 189 Chung-Cheng Road, Wufeng, Taichung 41362, Taiwan, ROC;3. Department of Plant Protection, Chiayi Agricultural Experiment Station, Taiwan Agricultural Research Institute, 2 Minquan Road, Chiayi 60044, Taiwan, ROC;1. NSF Center for Integrated Pest Management, North Carolina State University, Raleigh, NC 27606, USA;2. Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Guangdong Institute of Applied Biological Resources, Guangzhou 510260, China;3. Fruit Research Institute, Fujian Academy of Agricultural Sciences, Fuzhou, Fujian 350013, China;1. Forewarning and Management of Agricultural and Forestry Pests, Hubei Engineering Technology Center, Institute of Insect, College of Agriculture, Yangtze University, Jingzhou, Hubei Province, China;2. Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China |
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| Abstract: | The effects of three insecticides including deltamethrin, spirotetramat and flupyradifurone on pre-imaginal stages of Trichogramma evanescens Westwood (Hymenoptera: Trichogrammatidae) were investigated using dipping method. The mean emergence rate of T. evanescens when exposed to the recommended field concentrations of deltamethrin, spirotetramat and flupyradifurone were 62.8, 84 and 86.1%, respectively while 94.3% of the wasps emerged in the control group. According to the concentration–response experiments, the LC50 values of deltamethrin, spirotetramat and flupyradifurone were 262.9, 274.8 and 334.8 ppm, respectively. The results indicated that lethal (LC50) and sublethal (LC30) concentrations of three tested insecticides significantly reduced the fecundity and longevity of T. evanescens. However, LC30 of spirotetramat and flupyradifurone didn’t influence the oviposition duration of the wasps when compared with the control group. The gross reproductive rate (GRR), intrinsic rates of increases (r), net reproductive rate (R0), and finite rate of increase (λ) were significantly lower in all the treated wasps in comparison with control. However, the mean generation time (T) was not affected by the sublethal concentrations of tested insecticides. According to our findings, all insecticidal treatments have adverse effects on the population of T. evanescens, notwithstanding sublethal concentration of flupyradifurone followed by spirotetramat were more compatible with adults T. evanescens in comparison with deltamethrin. However, further studies under the field conditions are required to confirm the results. |
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| Keywords: | Biological control Insecticide Life table Non-target effects Parasitoid |
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