利用蠋蝽防治几种林业害虫的试验

1988～1989年在吉林省双辽县实验林场调查,蠋蝽能捕食40种农林害虫。尤喜捕食榆紫叶甲幼虫,黄刺蛾幼龄幼虫,平均日捕食量分别为0.82头和0.72头。按益害比1:5释放蠋蝽防治榆紫叶甲幼虫及成虫、黄刺蛾幼龄幼虫和杨扇舟蛾幼虫,15天后调查防治效果分别为69.2％、39.9％、65.4％和41.6％。

EXPERIMENTS ON THE USE OF ARMA CUSTOS (FABRICIUS) [HEM.: PENTATOMIDAE] TO CONTROL FOREST PESTS

Results of the field studies in the Forest Experiment Station of Shuang Liao County, Jilin Province during 1988-1989 showed thatArma custos could prey on 40 species of agricultural and forest pests with preference on the larvae of Ambrostoma quadriimpressum [Col.: Chrysomelidae] and the young larvae of Cnidocampa flavescens [Lep.: Cochlidiidae]. One adult could kill an average of 0.82 and 0.72 larvae of the two pest species per day, respectively. When the predator was released into the forest at a predator:prey ratio of 1:5, the population reduction at 15 days after the release for the larvae and adults of A. quadriimpressum, young larvae of C. flavescens, and larvae of Clostera anachoreta was 69.2%, 39.9%, 65.45 and 41.6%, respectively.