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为了科学用药和抗性治理提供理论基础,采用稻茎浸渍法测定了2008年7月采自浙江省杭州市和宁波市褐飞虱Nilaparvata lugens(Sta°l)种群对7种杀虫剂的抗药性及褐飞虱和白背飞虱Sogatella furcifera(Horv偄th)种群对16种杀虫剂的敏感性。褐飞虱抗药性测定结果表明,与相对敏感品系相比,杭州种群和宁波种群对吡虫啉的抗性倍数分别为479.0倍和366.1倍;对氯噻啉的抗性倍数分别为81.1倍和50.9倍;对噻虫嗪的抗性倍数分别为10.3倍和9.4倍;对噻嗪酮和氟虫腈分别产生了5.0～8.6倍和15.8～17.0倍的抗药性;对烯啶虫胺和啶虫脒的抗性倍数在3倍以下。两种稻飞虱对杀虫剂的敏感性测定结果表明:噻虫嗪、噻嗪酮、烯啶虫胺和毒死蜱对褐飞虱和白背飞虱种群都具有较高的室内毒力。当田间褐飞虱和白背飞虱混合发生时,可选用噻虫嗪、噻嗪酮、烯啶虫胺和毒死蜱进行防治,不宜使用吡虫啉、氯噻啉和氟虫腈防治。
In order to provide a theoretical basis for scientific drug use and resistance management, the resistance to 7 insecticides of Nilaparvata lugens (Sta ° l) populations collected from Hangzhou, Zhejiang Province and Ningbo City in July 2008 was determined by rice stem dipping method. Sensitivities of 16 populations of BPH and Sogatella furcifera (Horvix 偄 th) populations to 16 insecticides. The results of resistance determination of BPH showed that the resistance multiple of Hangzhou population and Ningbo population to imidacloprid were 479.0 times and 366.1 times respectively compared with that of relative susceptible strain, and 81.1 times and 50.9 times to chlorothiazide respectively. Thiamethoxam resistance was 10.3 times and 9.4 times respectively; for buprofezin and fipronil 5.0 to 8.6 times and 15.8 to 17.0 times, respectively; resistance to nitenpyram and acetamiprid Sex multiples of less than 3 times. The results of the sensitivity test of two planthoppers to insecticides showed that thiamethoxam, buprofezin, nitenpyram and chlorpyrifos had higher indoor toxicity to the BPH and white-backed planthopper populations. Thiamethoxam, buprofezin, nitenpyram and chlorpyrifos may be selected for control when brown planthopper and white-backed planthopper are mixed in the field, and imidacloprid, chlorophenazone and fipronil should not be used for prevention and treatment.