摘要
【背景】螺旋粉虱是新入侵中国海南的一种危险性害虫,化学防治是目前最主要的防治手段和应急措施。【方法】采用POTTER喷雾法监测了海南各地理种群螺旋粉虱对毒死蜱、丙溴磷、高效氯氰菊酯、高效氯氟氰菊酯、吡虫啉、啶虫脒和阿维菌素等7种药剂的抗性水平,并运用Tabashnik域性状分析法估算了螺旋粉虱对毒死蜱的抗性现实遗传力。【结果】螺旋粉虱对各药剂均处于抗性敏感阶段,抗性倍数为1.03-4.29倍。螺旋粉虱对毒死蜱的抗性现实遗传力h2=0.2405;预测结果表明,当田间使用毒死蜱对螺旋粉虱的防治效果达90%时,螺旋粉虱对毒死蜱的抗性提高10倍所需代数为7.09代。田间试验表明,螺旋粉虱对毒死蜱的抗性发展速率要比模型预测缓慢。【结论与意义】本研究可为螺旋粉虱的化学防治及抗药性治理提供参考。
[Background] The spiraling whitefly Aleurodicus dispersus Russell is a destructive invasive species first found in Hainan, China, in 2006.As a new quarantine pest, chemical control was considered the most effective measure to depress and eradicate the field population.[Method] By the method of a Potter bioassay, we monitored the insecticide resistance of field strains of A.dsi persus to seven common used insecticides （ chlorpyrifos, profenofos, beta-cypermethrin, lambda-cyhalothrin, acetamiprid, imidacloprid, abamectin） .The realized heritability of resistance and resistance risk of A.dispersus to chlorpyrifos were evaluated using threshold trait analysis.[Result] The field strains tested displayed no resistance to insecticides, with a resistance ranging between 1.03 and 4.29.The realized heritability of resistance to chlorpyrifos was 0.2405.Theoretically, it requires 7.09 generations for A.dispersus to develop 10-fold resistance to chlorpyrifos under selective pressure of 90%mortality for each successive generation.Field trials re-vealed that the risk of resistance to chlorpyrifos was below that of the threshold trait analysis.[Conclusion and significance] This study indicated that chemical control may still be effective against this invasive pest.
出处
《生物安全学报》
2015年第1期45-50,共6页
Journal of biosafety
关键词
螺旋粉虱
抗药性
毒死蜱
现实遗传力
风险评估
Aleurodicus dispersus
insecticide resistance
chlorpyrifos
realized heritability
risk assessment
