13种杀虫剂对小地老虎卵和幼虫的生物活性

Biological activity of 13 insecticides to eggs and larva of Agrotis ypsilon Rottemberg

为明确13种杀虫剂对小地老虎卵和3龄幼虫的生物活性,分别用浸卵法和浸叶法进行了室内毒力测定。结果表明,拟除虫菊酯类杀虫剂溴氰菊酯、高效氯氟氰菊酯、甲氰菊酯、高效氯氰菊酯、氰戊菊酯对小地老虎卵和幼虫活性较高,LC_(50)值均小于0.9 mg/L;其次为毒死蜱、甲维盐、丁烯氟虫腈、虫螨腈、茚虫威,其中灭幼脲的毒力最低。因此在小地老虎综合治理中,可选用杀卵和幼虫活性较高的拟除虫菊酯类药剂,与具有作用机制新颖的杀虫剂茚虫威、虫螨腈交替使用,防止小地老虎产生抗药性。

Biological activity were tested with dipping egg and leaf methods to determine the efficacies of 13 insecticides in controlling the eggs and larva of agrotis ypsilon rottemberg. The rusuhs showed that the pyrethroid insecticides such as decamethrin, lambda - cypermethrin, fenpropathrin, beta - cypermethrin, fenvalerate had relatively higher toxicity to the larva and eggs of agrotis ypsilon rottemberg with LC50 lower than 0. 9 mg/L; chlrpyrifos, emamectin benzoate, butane - fipronil, chlorfenapyr, indoxacarb had lower toxicity, and chlorbenzuron had the lowest toxicity. In conclusion, the pyrethroid insecticides should be preferred use and combined with the long -validity insecticides indoxacarb and chlorfenapyr to control agrotis ypsilon rottemberg. Purpose is to prevent pest resistance.