生物药剂乙基多杀菌素对锈赤扁谷盗成虫的毒杀作用

Controlling Effect of Spinetram Against Cryptolestes Ferrugineus(Stephens) Adults

室内测定生物杀虫剂乙基多杀菌素(spinetram)对主要储粮害虫锈赤扁谷盗成虫的控制作用。结果表明,乙基多杀菌素对锈赤扁谷盗成虫具有很强的触杀作用和种群抑制作用。当处理剂量为8μg/cm2,作用时间48 h时,乙基多杀菌素对锈赤扁谷盗成虫的校正死亡率达100%,半致死浓度LC50值1.934μg/cm2;当处理剂量为2 mg/kg时,乙基多杀菌素对锈赤扁谷盗成虫当代和子代种群抑制率均达100%。乙基多杀菌素对锈赤扁谷盗成虫没有驱避作用。

An investigation was made into the repellent,contact effects and population inhibition toxicity of spinetram against cryptolestesferrugineus（stephens） adults.The results showed that the spinetram exhibited strong contact and population inhibition toxicity against stephens adults. The contact toxicity significantly increased with the treatment concentration with the corrected percentage mortality reaching 100% at a concentration of 8 Ixg/cm2 and under 48 h of exposure period. The LCs0 values of the spinetram to stephens,is 1.934 Ixg/cm2.The current population inhibition rate and F1 progeny popu- lation inhibition rate of the spinetram against stephens also remarkably increased with increasing treatment concentration, reaching 100% and 100% at the concentration of 2 mg/kg grain,respectively.The spinetram have not repellent effect against stephens.