马尾松毛虫种群动态和综合治理

Population Dynamic and Comprehensive Control of Dendrolimus punctatus

龙游县马尾松毛虫的发生分安全区、偶灾区和常灾区３种类型，安全区基本呈无虫状态，常、偶灾区１９８７年前每２～３年和６～７年大发生１次，１９８７年后每３～４年和６～７年有一个幅度小、时间短的虫口上升期。该县白僵病的流行是抑制松毛虫种群增长的主导因子，其次是赤眼蜂的寄生，因此，采用以营林措施为基础，生物预防为主、化学防治为辅的综合治理的是适合该县的防治策略的，１９８１～１９９４年共为松林挽回经济损失３３５６．２万元，获经济效益３０２４．５万元，同时取得了明显的生态和社会效益。

There are 3 types of occurrence of Dendrolimus punctatus in Longyou,Zhejiang provice.The main factor to inhibite D.punetatus population increase is muscardine and parasite of Trichogramma sp.Therefore,comprehensive control with management as essential, biological as main method with chemical one was suitable for this area.