几种杀虫剂对茄二十八星瓢虫及其优势寄生蜂的影响  

EFFECTS OF INSECTICIDES ON HENOSEPILACHNA VIGINTIOCTOPUNCTATA AND ITS LARVAL PARASITE, PEDIOBIUS FOVEOLATUS

作　　者：王国红[1] 李火苟[1] 盛金坤[1] 

机构地区：[1]江西农业大学植保系

出　　处：《昆虫天敌》1998年第4期164-168,共5页Natural Enemies of Insects

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.

关 键 词：杀虫剂 茄二十八星瓢虫 瓢虫柄腹姬小蜂 毒力效果 

分 类 号：S476.3[农业科学—农业昆虫与害虫防治] S482.3[农业科学—植物保护]