四川省大邑县舞毒蛾天敌的研究*

１９９３年在大邑县共收集到舞毒蛾天敌３０种，其中寄生性昆虫１９种，捕食性昆虫９种，病毒和虫霉菌各１种。卵期平均寄生率为２７．０６％±０．５４％，大蛾卵跳小蜂是主要天敌。幼虫期天敌有病毒、斑痣悬茧蜂、毒蛾镶颚姬蜂和绒茧蜂等，平均杀死幼虫５１．５９％±６．４８％。蛹期主要天敌有寄蝇、广大腿小蜂和脊腿囊爪姬蜂等，平均寄生率达３２．９１％±２６．４０％。在舞毒蛾卵－蛹期，累计约有８７．６２％的个体被天敌致死。

Studies on the Natural Enemies of Gypsy Moth,Lymantria dispar(Lep.:Lymantriidae)in Dayi,Sichuan Province

In the field studies conducted in Dayi County,Sichuan Province in 1993,30 species of the natural enemies of gypsy moth Lymantria dispar were collected,including 19 parasitoids,9 predators,one NPV and one fungus Entomophaga maimaiga.3 of them were natural enemies in egg stage,the egg-parasitic wasps can make a parasitism of 27.06%±0.54% in average,Ooencyrtus kuwanae was the dominant one.13 of them were parasitoids in larval stage,the dominant species of Meteorus pulchricornis,Hyposoter vierecki,Glyptapan-teles liparidis and NPV can kill the larvae with a proportion of 51.59%±6.48% in average,NPV was the most important one in this stage.Tachinid maggots parasitized a lot of gypsy moth larvae,which came out from larvae with a percentage of 26.5% and from pupae 73.5%.There were 4 kinds of parasitoids in the pupal stage with a parasitism of 32.91%±26.40% in average,which are tachinids,Brachymeria lasus,Thqeronia atalantae gestator etc.About 87.62% of the gypsy moth individuals were killed by natural enemies from egg to pupal stage.The biology and habits of 7 natural enemy species were also introduced in this paper.