【摘要】 选择禄丰县五台山林管所白泥洞哨所受纵坑切梢小蠹危害严重的2hm2林分作药效试验区,于小蠹虫转梢期但未侵入树干前,用护林神粉剂喷粉2次;选择邻近试验区长势、危害程度等相近的林分设置2hm2对照区.结果表明:施药区的松小蠹蠹害指数为1.4,被害株率为3.8%;而对照区的蠹害指数为16.2,被害株率为28.5%;防治效果达91.4%.更多还原

【Abstract】 ’Hulinlshen’ powder was applied to 2 hm~2 stand of Pinus yunnanensis heavily infected by Tomicus piniperda twice during the period of shoot transferring of Tomicus piniperda pests, but prior to their invasion into target trees to control the bugs in Lufeng County, Yunnan. A piece of adjacent Pinus yunnanensis stand with the same area of 2 hm~2 was set as control. The results showed that the damage index of the experimental area was 1.4 and the damage rate was 3.8%, while the damage index and the damage rate in the control area were 16.2 and 28.5% respectively. The control effect reached 91.4% in this trial.更多还原