Abstract
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.
Original language | English |
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Pages (from-to) | 321-326 |
Number of pages | 6 |
Journal | Journal of Integrative Agriculture |
Volume | 11 |
Issue number | 2 |
DOIs | |
Publication status | Published - Feb 2012 |
Keywords
- MANAGEMENT
- imidacloprid
- POPULATIONS
- thiamethoxam
- ISRAEL
- neonicotinoids
- BIOTYPE-Q
- WHITEFLIES
- CROSS-RESISTANCE
- cross-resistance
- pymetrozine
- MARKERS
- P450
- INSECTICIDE-RESISTANCE
- EXPRESSION
- dinotefuran
- acetamiprid
- B-BIOTYPE