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期 刊 ：植物保护学报 2009年

关键词：B型烟粉虱；药剂；毒力；驱避作用；

Keywords:Bemisia tabaci type B, insecticide, toxicity, repellent action,

摘 要 ：分别采用试管药膜法、浸渍法和喷雾法测定不同药剂对B型烟粉虱各虫态的毒力和对成虫的驱避作用。结果表明,阿维菌素、吡虫啉、氯氟氰菊酯、噻虫嗪、烯啶虫胺和灭多威对烟粉虱成虫的毒力均较高,分别是噻嗪酮的3625.3、873.4、841.4、312.8、154.3和53.4倍;蚊蝇醚对卵的毒力最高,LC₅₀为0.009mg/L,其毒力是噻嗪酮的91151.9倍;阿维菌素、噻虫嗪、吡虫啉、烯啶虫胺、虱螨脲和氯氟氰菊酯对1龄若虫的毒力较高,且显著高于对3龄若虫的毒力;3种昆虫生长调节剂类药剂对若虫致毒作用缓慢;吡虫啉和噻虫嗪对烟粉虱成虫的驱避效果好,持效期可达15天;绿颖矿物油对成虫的驱避率较高,并有较好的杀卵作用。

Abstract:Toxicity of several insecticides to different instars nymphs of Bemisia tabaci and the repellent actions to the adults were detected using the residual film, immersion and spraying methods. The results showed that avermectins, imidacloprid, cyhalothrin, thiamethoxam, nitenpyram and methomyl all had high toxicity to the adults of Bemisia tabaci, compared to buprofezin, the toxicity ratios were 3625.3, 873.4, 841.4, 312.8, 154.3 and 53.4, respectively. Pyriproxyfen had the highest toxicity to the eggs, the LC₅₀ value was 0.009mg/L, compared to buprofezin, the toxicity ratio was 91151.9. Avermectins, thiamethoxam, imidacloprid, nitenpyram, lufenuron and cyhalothrin all showed high toxicity to 1^st instar nymph, and the toxicity to 1^st instar nymph was higher than to 3^rd instar. Three IGRs effected on the nymphs slowly. Thiamethoxam and imidacloprid had higher repellent actions to the adults, and the persistent repellent actions lasted 15 days. Lvying petroleum oil showed high toxicity to the eggs and high repellent action to the adults. It had practical value.

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