Journal of Economic Entomology (2019) 112, 2354-2361

Xing-Xing Sun, Hong-Yang Li, Ying-Jie Jiang, Jun-Xi Zhang, Hui-Ling Gu, Bo Gao, Jing-Jing Ma, Fan Wang, Jia-Chun Zhou, Xiang-Rui Tian, Jianya Su and Kai Wang (2019)
Resistance risk evaluated by metaflumizone selection and the effects on toxicities over other insecticides in Spodoptera exigua (Lepidoptera: Noctuidae)
Journal of Economic Entomology 112 (5), 2354-2361
Abstract: Metaflumizone is a novel semicarbazone insecticide. It functions as a sodium channel blocker insecticide (SCBI) with excellent insecticidal activity on most economically important lepidopterous pests. This study assessed the resistance risk of Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae) to metaflumizone in the laboratory and the effects of metaflumizone selection on toxicities to other insecticides. Spodoptera exigua collected from a field population at Huizhou in 2012 were successively challenged by metaflumizone to evaluate the risk of resistance evolution. Twelve generations of selection increased resistance to metaflumizone by 3.4-fold and threshold trait analysis revealed that the realized heritability (h²) of this resistance was 0.086. When h² was equal to 0.086 and 90% of individuals were killed at each generation, LC₅₀ to metaflumizone increased by 10-fold after 15 generations. The selection by metaflumizone did not increase the resistance to indoxacarb, chlorantraniliprole, spinosad, methomyl, or endosulfan, suggesting a lack of cross-resistance. However, metaflumizone challenge upheld the recession of resistance to emamectin benzoate, chlorfluazuron, and tebufenozide. The block of resistance drops by metaflumizone exposure implied a possible cross-resistance between metaflumizone and these three insecticides. These results contribute to integrated resistance management of S. exigua.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Jianya Su

Research topic(s) for pests/diseases/weeds:
pesticide resistance of pest

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Spodoptera exigua