福州地区黄曲条跳甲的抗性监测

采用浸叶法对福建福州建新和洪塘、闽候荆溪菜区黄曲条跳甲(Phyllotretastriolata)抗药性的时空动态变化进行了监测.与网室内相对敏感品系相比,3个菜区的黄曲条跳甲对敌敌畏、毒死蜱、辛硫磷、乙酰甲胺磷、丁硫克百威、氰戊菊酯、氯氰菊酯、高效氯氰菊酯、溴氰菊酯、三氟氯氰菊酯和锐劲特均产生不同程度的抗性,且不同菜区黄曲条跳甲抗药性水平差异较大.2001年11月至2003年1月的监测结果显示,建新菜区黄曲条跳甲对敌敌畏、氰戊菊酯和氯氰菊酯的抗性水平在1年内不同时期变化较大.根据抗性监测结果,对抗性治理对策进行了讨论.

Temporal and spatial dynamics of resistance to some commercial insecticides in Phyllotreta striolata(Fabricius)(Coleoptera:Chrysomelidae) in Fuzhou, China

Temporal and spatial dynamics of resistance to some commercial insecticides were detected by leaf-dipping technique in the field populations of the striped flea beetle Phyllotreta striolata(Fabricius). Compared with the relatively susceptible population which was reared in the field insectarium for six generations under insecticide-free condition, different resistance levels to conventional insecticides, including dichlorvos, chlorpyrifos, phoxim, acephate, carbosulfan, fenvalerate, cypermethrin, beta-cypermethrin, delamethrin, lambdacyhalathrin and fipronil, were found in the field populations of P.striolata collected from Jianxin and Hongtang of Fuzhou, and Jingxi of Minhou, Fujian, China, respectively. The levels of resistance to the insecticides among the field populations of P.striolata from the three vegetable districts were significantly different. Meanwhile, great variations of resistance to dichlorvos, fenvalerate and cypermethrin were found in different seasons by field monitoring from Nov. 2001 to Jan. 2003 in Jianxin population of P.striolata. In addition, the strategy of resistance management was discussed based on the results of resistance monitoring.