摘要
室内初步试验了敌敌畏等５种杀虫剂对茄二十八星瓢虫的毒力效果，并从中挑选出杀虫效果较好的敌敌畏、速灭杀丁、害极灭３种杀虫剂，研究其对茄二十八星瓢虫优势寄生蜂——瓢虫柄腹姬小蜂的影响。结果表明：敌敌畏、速灭杀丁、害极灭在大田常规使用浓度范围内，对瓢虫杀伤力强、死亡率达９０％以上；对寄生蜂的毒力依次为敌敌畏＞速灭杀丁＞害极灭，各浓度对寄生７ｄ后蜂蛹影响不大，但对寄生１～５ｄ的蜂幼阶段危害很大；害极灭５０００倍，速灭杀丁４０００～６０００倍，敌敌畏８０００倍时，低龄蜂幼能少量出蜂，并且羽化出的蜂繁殖力与正常蜂无显示差别。
Laboratory studies were conducted to determine the effects of 5 insecticides on Henosepilachna vigintioctopunctata and its larval parasite, Pediobius foveolatus . Laboratory tests showed that dichlorvos, fenvalerate and abamectin, at normally recommended rates, caused high larval mortality of 90% for 72 hours. These three insecticides had no significant effects on pupae 7 days after parasite oviposition, but profound interference of parasitic development does occur when insecticides were applied to host larvae, 1￣5 days after parasite oviposition. Dichlorvos was more toxic than fenvalerate and abamectin.
出处
《昆虫天敌》
CSCD
1998年第4期164-168,共5页
Natural Enemies of Insects
