- 期刊
Study on Cross-resistance between BPU-type IGRs and Other Insecticides Including Bacillus thuringiensis and Abamectin in the Diamondback Moth, Plutella xylostella L.
小菜蛾對BPU類生長調節劑及其他殺蟲劑交互抗性之研究
摘要
本研究測試抗benzoylphenylurea (BPU)類生長調節劑之小菜蛾對有機磷劑、氨基甲酸鹽劑、合成除蟲菊精、BPU類生長調節劑、蘇力菌及阿巴汀是否具有交互抗性。結果顯示，以BPU類生長調節劑篩選之品系對加保扶有交互抗性。抗BPU類生長調節劑之小菜蛾品系對其他受測藥劑均不具交互抗性，且對蘇力菌及阿巴汀之感度仍極高。BPU類中不同的生長調節劑問則具交互抗性，惟程度不一，其中，hexaflumuron受交互抗性之影響最小，其次為chlorfluazuron，而flufenoxuron與teflubenzuron則有極嚴重之交互抗性。此一現象在田間抗BPU類生長調節劑之品系，及以單劑汰選出之抗性品系均相同。而於田間篩選抗性時，則以已在本省登記之chlorfluazuron及teflubenzuron較flufenoxuron及hexaflumuron快速，可能與前兩項藥劑已在台灣使用有關。再由BPU類生長調節劑之化學結構，以及感、抗性品系之測試結果分析推測，BPU類生長調節劑Phenyl-環上之3,5-dichloro-結構與位置4上之大型鍵結側基(moiety)，可降低小菜蛾對BPU類生長調節劑之抗性程度。
並列摘要
Investigation of cross-resistance of diamondback moth(DBM), Plutella xylostella L., which resisted to benzoylphenyl urea(BPU)-type insect growth regulator (IGR), among four organophosphorus insecticides, two carbamates, two synthetic pyrethroids, four IGRs, Thuricide and Abamectin was conducted us this study. The IGR-selected strains did not show strong cross-resistance to test insecticides except carbofuran. A relatively high resistance to synthetic pyrethroids was recorded as synthetic pyrethroid resistance of the DBM is an existing phenomenon in Taiwan. All IGR-resistant strains were still highly sensitive to Thuricide and Abamectin. Cross-resistance among different IGRs is significant in different amplitudes. Hexaflumuron was the least affected by IGR cross-resistance and followed by chlorfluazuron, while flufenoxuron and teflubenzuron confronted with the most serious cross-resistance problem. The IGR-resistance in DBM is chemical structure-related. Analyses of structure-activity relationship in both susceptible and resistant strains indicated both 3,5-dichloro-and a large side moiety at position-4 on the phenyl ring of BPU are beneficial to reduce the IGR-resistance in DBM.
延伸閱讀
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