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在党的十一届三中全会和五届人大二次会议精神鼓舞下,我们在松毛虫危害严重的柘庄公社作了放蜂治虫的试验。这个公社发生松毛虫面积4900余亩,虫口密度每株松树达28.6条,最多的有81条。放蜂治虫的面积2664亩,赤眼蜂的寄生率达70-76％,在放蜂的空隙地带,采用杀螟杆菌和化学药剂等综合防治,已取得了预期的效果。目前松林枝叶繁茂,郁郁葱葱。这次使用的赤眼蜂是省林科所提供的。放蜂期根据越冬代成虫羽化率来确定,当成虫羽化50-60％时才开始放蜂。观察虫情由技术人员和该社的林业员共同进行,公社党委在放蜂前召开专门会议,
Inspired by the spirit of the Third Plenary Session of the 11th Central Committee of the Party and the Second Session of the Fifth National People’s Congress, we tested the Beeswax Commune in the Chongzhuang commune, where the dendritic caterpillar seriously jeopardized. The commune area of 4,300 mu of caterpillars, bugs density of 28.6 pine trees per plant, up to 81. The area of bee-eaters with 2664 mu and the parasitism rate of Trichogramma was 70-76%. The integrated control of the fungicides and chemical agents in the interspaces of bee-eaters has achieved the expected results. Currently pine lush foliage, lush. Trichogramma used this time is provided by Linke. The bee-keeping period is determined according to the emergence rate of overwintering adult adults, and beekeeping begins when the emergence of adults is 50-60%. Observation of insects by the technical staff and the club’s forestry workers together, the commune party held a special meeting before the release of bee,