Journal
PEST MANAGEMENT SCIENCE
Volume 68, Issue 2, Pages 285-289Publisher
WILEY
DOI: 10.1002/ps.2258
Keywords
Plutella xylostella; fufenozide; cross-resistance; fitness cost
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Funding
- National Basic Research Programme of China [2006CB102003]
- National Natural Science Foundation of China [30671389, 30300232, 30530530]
- National Key Research Programme of China [2006BAD08A03]
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BACKGROUND: Fufenozide is a novel non-steroidal ecdysone agonist with good efficacy against diamondback moth (DBM), Plutella xylostella (Lepidoptera: Plutellidae). At present, it is widely applied for the control of a range of lepidopterous pests in China. This study compared the activities of fufenozide and 12 other insecticides against unselected and fufenozide-selected strains of DBM to examine potential patterns of cross-resistance. The relative fitness of the fufenozide-selected strain was assessed to provide information pertinent to insecticide resistance management. RESULTS: Compared with the susceptible strain (JSS), the fufenozide-resistant strain (JSR) showed high cross-resistance to dibenzoylhydrazines andbenzoylphenylureas, lowcross-resistance to abamectin andnocross-resistance to organophosphates, carbamates and pyrethroids. JSR had a lower reproductive ability and a relative fitness of 0.5 compared with JSS. CONCLUSION: P. xylostella has the potential to develop resistance to fufenozide, albeit at the expense of fitness. Crossresistance between the same and other classes of insecticides is of concern, and should be a key consideration when implementing fufenozide-based control strategies for this species. (C) 2011 Society of Chemical Industry
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