摘要： 爱比菌素（Abamectin）是一种新的生物杀螨剂，是由除虫链霉菌（Streptomycesavermitilis）发酵产生的大环内酯化合物。它对久效磷抗性敏感的两组朱砂叶螨种群有很高的毒性，LC₅₀值各为0.0038mg/L和0.0153mg/L,LC₉₅值分别为0.0263mg/L和0.0279mg/L.用0.0288mg/L（近似LC₉₅）的浓度处理带螨的棉叶，幼若螨在72h死亡率达90%,对卵无效；该浓度处理棉苗7天后对成螨和幼若螨无残效。用近似LC₅₀浓度（0.0072mg/L）处理雌成螨，其残存雌螨单雌产卵量比对照减少84.8%;而其F₁单雌产卵量比对照增加100%以上。

关键词: 爱比菌素, 朱砂叶螨, 毒力, 生物学特性

Abstract: Abamectin is a neval macrocyclic lactone natural product produced by fermentation of Streptomyces avermitilis.The results of laboratory bioassays show that abamectin is highly toxic to monocrotophos resistant and susceptible Tetranytrus cinnabarinus(Boisduval).LC₅₀ are 0.0038 and 0.0153 mg/L respectively,and LC₉₅ are 0.0263 and 0.0279 mg/L respectivily.When the dosage of 625 thousand times of 0.15EC(18g/L)abamectin sprayed on leaves of cotton,mortality of larvae and nymphs is 52.8% in 24h and 90.0% in 72h,and no effect against eggs.One week after the dosage application which treat cotton seedlings,abamectin has no residual effect to the mite.After the female adults are treated by LC₅₀ value,the mean eggs/female decreased 84.8% in the residual individuals,but increased 100% in their F₁ generation.

Key words: Cotton, Tetranytrus cinnabarinus, Abamectin, Biological effect

中图分类号: 

• S433.7