Resistance of Egyptian Field Populations of Spodoptera littoralis (Lepidoptera: Noctuidae) to Emamectin Benzoate and Role of Detoxification Enzymes
Publish place: International journal of Advanced Biological and Biomedical Research، Vol: 10، Issue: 4
Publish Year: 1401
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJABBR-10-4_005
تاریخ نمایه سازی: 17 آبان 1401
Abstract:
Background: One of the most significant pests that harm numerous agricultural crops is the cotton leafworm Spodoptera littoralis (Boisduval) and it has evolved resistance to various insecticides across most chemical classes, including the novel insecticide emamectin benzoate. Methods: The sensitivity of emamectin benzoate was evaluated in Egyptian cotton leafworm field populations. Results: According to bioassays performed using the leaf-dipping method, emamectin benzoate sensitivity varied among ۵ field populations, with LC۵۰ values ranging from ۲.۷۸ to ۶.۸۶ ppm. Two S. littoralis populations demonstrated the low levels of resistance at resistance ratios (RR) between ۱۷.۹- and ۲۲.۳-fold and three populations showed moderate resistance at ۳۳.۵ to ۴۲.۸-fold compared with a susceptible population. The findings demonstrated that diethyl maleate (DEM) and piperonyl butoxide (PBO) have considerable synergistic effects on the toxicity of emamectin benzoate. Conclusion: The results suggest that emamectin benzoate resistance in the S. littoralis populations studied may be caused by the enzyme systems monooxygenase (MO) and glutathione S-transferase (GST).HighlightsEmamectin benzoate efficacy is decreasing in populations of Spodoptera littoralis.Emamectin benzoate resistance in littoralis field populations ranges from low to moderate. The field populations' monooxygenase and glutathione S-transferase activity were higher than those of the susceptible population.
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Authors
Seham Mansour Ismail
Insect Population Toxicology Department, Central Agricultural Pesticides Laboratory, Agriculture Research Center, ۱۲۶۱۸, Giza, Egypt
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