华北落叶松鞘蛾防治技术的研究

Study on Control Techniques of Sheath Moth of Larix principis

防治落叶松主要的鞘蛾虫害,研究华北落叶松鞘蛾防治技术,是提高林区树木健康生长的重要手段。选择华北地区的某落叶松林区作为试验地,准备实验材料。将物理、生物、化学防治技术相结合,综合防治落叶松鞘蛾,长期采集并观察鞘蛾样本及样树情况,了解了落叶松鞘蛾的生物学特性及危害症状。试验结果表明:利用研究技术防治后3d的鞘蛾平均死亡率根据不同用量分别为25.57%、34.54%、17.43%;15d的鞘蛾平均死亡率分别为89.87%、96.53%、85.97%。可见该方法有效降低了虫口密度,增加了鞘蛾死亡率,说明该方法具有有效性,可推广使用。

The prevention and control of the main sheath moth pests of Larix principis is an important means to improve the healthy growth of trees in forest areas.This research studies the prevention and control technology of sheath moth of Larix principis.A certain Larix principis was selected as the test site to prepare test materials.Physical,biological,and chemical control technologies are combined to comprehensively control the larch moth.Samples of the larch moth and the condition of the trees are collected and observed for a long time.The biological characteristics and the symptoms of the larch moth are understood.According to the test results and discussion,the average mortality rate of sheath moths after 3 days of control by the research technology was 25.57%,34.54%,and 17.43%according to different dosages;the average mortality rates of sheath moths at 15 days were 89.87%,96.53%,and 85.97%,respectively.The method in this paper effectively reduces the population density and increases the mortality of the sheath moth,which shows that the method in this paper is effective.