两种昆虫生长调节剂对嗜虫书虱的致死作用

系统测定了灭幼宝（Pyriproxyfen)和烯虫酯（Methoprene) 2种昆虫生长调节剂对储藏物主要害虫嗜虫书虱（Liposcelis entomophila)的生物活性。采用饲料混药法，针对不同浓度的灭幼宝和烯虫酯分别对嗜虫书虱若虫的致死作用，对若虫发育历期，成虫繁殖力和卵孵化率的影响设置不同处理和重复。结果表明，灭幼宝对嗜虫书虱若虫的致死作用非常明显，其效果比烯虫酯好；不同浓度的灭幼宝使若虫的发育历期明显延长; 灭幼宝和烯虫酯对嗜虫书虱的成虫无杀伤作用，但对成虫的产卵量有明显的抑制作用，两者的作用浓度却相差5倍。灭幼宝对卵的孵化率影响更大，因而具有更显著的杀卵效果。

Acute Lethal Effect of Two Insect Growth Regulators on Liposcelis entomophila (Psocoptera:Liposcelididae)

The biological activities of two IGRs,Methoprene and Pyriproxyfen,on Liposcelis entomophila (Enderlein),a main insect pest occurring in the preserver,were investigated systematically.By infiltrating two IGRs into the fodder,the different treatments and replication were set up based on the lethal effect of these two IGRs at different concentrations as well as the influence on development time and survivorship of L entomophila nymphs.The results showed that two IGRs had obvious lethal effect on nymph,and the lethal effect of Pyriproxyfen on nymph was better than that of Methoprene.The development of L entomophila nymph was delayed when insects fed on the food treated with Pyriproxyfen.These two IGRs had no acute lethal effect on adult;however,the adult fecundity was in hibited significantly.The inhibition of Methoprene on adult fecundity was 5 times greater than Pyriproxyfen.In addition,these two IGRs had obvious lethal effects on egg hatching, whereas the effect of Pyriproxyfen on egg hatching was greater than Methoprene.