Characterisation of Neonicotinoid and Pymetrozine Resistance in Strains of Bemisia tabaci (Hemiptera: Aleyrodidae) from China
Four strains of the Q biotype and one of the B biotype of the whitefly Bemisia tabaci collected from China were characterised for resistance to four neonicotinoid insecticides and pymetrozine. Q biotype strains showed moderate to strong resistance to imidacloprid, thiamethoxam and acetamiprid, but little or no cross-resistance to dinotefuron. Resistance to neonicotinoids was consistently associated with resistance to pymetrozine, despite the latter having a distinct (though unresolved) mode of action. The single B biotype strain proved largely susceptible to all the insecticides investigated. Resistance in the Q biotype strains was associated with over-expression of a cytochrome P450 monooxygenase gene, CYP6CM1, whose substrate specificity presumably accounts for the observed cross-resistance profiles.
Item Type | Article |
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Uncontrolled Keywords | MANAGEMENT; imidacloprid; POPULATIONS; thiamethoxam; ISRAEL; neonicotinoids; BIOTYPE-Q; WHITEFLIES; CROSS-RESISTANCE; cross-resistance; pymetrozine; MARKERS; P450; INSECTICIDE-RESISTANCE; EXPRESSION; dinotefuran; acetamiprid; B-BIOTYPE |
Date Deposited | 26 Jul 2024 18:24 |
Last Modified | 26 Jul 2024 18:24 |
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- Rao, Qiong
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- Denholm, Ian
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