Predatory Enemy of Harpalus griseus (panzer) against Pasture Pests

[ Objective] The paper aimed to study the biological property of predatory enemy of Harpalus griseus （panzer） against pasture pests. [ Method] H. griseus was collected to carry out biological feeding trial during late April to late October in 2008, predatory behavior was observed and the poisoning effect of pesticides on H. griseus was tested. [ Result] H. gdseus occurred generation in one year in Guizhou and overwintered in the soil in the form of adult. Adult was the main form to prey the quarry. One individual adult of H. griseus could mostly prey armyworm for 6.36 heads within 24 h, pesticides had obvious poison effect on H. gdseus in the former 10 d, while it mainly had repellent effect in the latter period. [ Conclusion] This study could provide theoretical foundation for protecting H. griseus and controlling pasture pests.

牧草害虫捕食性天敌毛婪步甲的研究

[目的]研究牧草害虫捕食性天敌毛婪步甲的生物学特性。[方法]2008年4月初至10月底采集毛婪步甲进行生物学饲养试验,然后进行捕食行为的观察,并测试农药对毛婪步甲的毒杀作用。[结果]毛婪步甲在贵州1年发生1代,以成虫在土壤内过冬。主要以成虫捕食猎物为主,1头成虫24h最大捕食黏虫量6.36头。农药对毛婪步甲前10d毒杀效果明显,后期主要是驱避作用。[结论]该研究可为保护毛婪步甲、防治牧草害虫提供理论依据。