森林苗圃地下害虫金龟子幼虫危害苗木根系,成为生产优质苗木的一大障碍。过去用有机氯农药防治金龟子幼虫,因残留毒性问题被禁止使用。以后用有机磷农药代替,但有机磷农药残效期短,受害面积不断扩大。青木等研究从长野县的大条金龟子分离出 Beavueria tenella 菌(卵孢白僵菌),应用这种菌防治金龟子幼虫取得了明显效果,同 Underground nurseries of forest nurseries Chafer larvae endanger the root system of nursery stock and become a major obstacle to producing quality nursery stock. In the past, organochlorine pesticides were used to control beetle larvae, which were banned because of residual toxicity. After the replacement of organophosphate pesticides, organophosphorus pesticides, short residual period, the victim area continues to expand. Aoki et al. Studied the isolation of Beavueria tenella (Beauveria bassiana) from the chafer of Nagano Prefecture. The application of this bacterium to control the beetle larvae achieved remarkable results.