竹螟(Algedonia cociesalis walker)是危害毛竹的主要害虫。杭州市每年受竹螟危害约15万亩。过去应用松毛虫赤眼蜂(Trichogramma dendroliml Matsumura)防治竹螟,一般放蜂4次,费工费时。今采用长效放蜂方法,平均寄生率为43.2％,放蜂为1～2次,节省劳力一半以上。放蜂区虫口明显降低,竹叶损失率明显下降。 Alder caterpillar (Algedonia cociesalis walker) is a major pest harmful to bamboo. Every year in Hangzhou, bamboo borer damage of about 15 acres. The past Trichogramma Trichogramma Trichogramma (Trichogramma dendroliml Matsumura) against Chilo suppressalis, the general release bee 4 times, time-consuming. This long-term use of beekeeping method, the average parasitic rate of 43.2%, put the bee for 1 or 2 times, saving more than half of labor. Put the bee population decreased significantly, bamboo leaf loss rate decreased significantly.