Characterization of field-evolved resistance to pyridalyl in a near-isogenic line of diamondback moth, Plutella xylostella

文献类型： 外文期刊

第一作者： Wang, Ran

作者： Wang, Ran;Luo, Chen;Zhang, Jiasong;Wang, Jinda;Fang, Yong;Feng, Honglin

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关键词： Plutella xylostella; pyridalyl; inheritance; near-isogenic line; cross-resistance; synergism; metabolic enzymes; fitness cost

期刊名称：PEST MANAGEMENT SCIENCE （ 影响因子：4.845； 五年影响因子：4.674 ）

ISSN： 1526-498X

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收录情况： SCI

摘要： BACKGROUND: Plutella xylostellahas developed resistance to a variety of pesticides in the field. Selection, inheritance, a near-isogenic line, cross-resistance and biochemical mechanisms of pyridalyl resistance were characterized in a field-collected resistant population ofP. xylostellafrom China. RESULTS: Compared with a susceptible IVF-S strain, the field-collected FZ population showed similar to 350-fold resistance to pyridalyl. The FZ-PY strain, selected from the FZ population using pyridalyl, developed similar to 640-fold resistance to pyridalyl. Inheritance tests indicated that pyridalyl resistance in the FZ-PY strain was autosomal and incompletely recessive. Through successive backcrossing to IVF-S, a near-isogenic strain (NIL-PY) was established that exhibited 191.21-fold resistance to pyridalyl and no cross-resistance to other tested popular insecticides. No significant effects of synergists and higher activities of metabolic enzymes were observed in NIL-PY compared with IVF-S. Furthermore, the survival rate of NIL-PY larvae, and female oviposition, fecundity and egg viability were markedly reduced in NIL-PY compared with IVF-S. The fitness of NIL-PY was found to be 0.56 compared with IVF-S. CONCLUSION: Considering that no relevant effects of synergists or oxidative metabolism were observed in NIL-PY, and that pyridalyl resistance results in significant fitness costs compared with IVF-S, further research will be conducted on the mechanism of target-site resistance. (c) 2020 Society of Chemical Industry

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