摘要
试验于 2 0 0 1年 8～ 9月 ,在内蒙古赤峰市克什克腾旗桦木沟林场华北落叶松人工林内进行。结果表明 ,使用 2 0 %灭·阿可湿性粉剂进行地面常规喷雾和喷粉防治落叶松毛虫的效果显著 ,采用用药量 4 5 0～ 75 0g/hm2 进行常规喷雾防治 ,落叶松毛虫虫口减退率达 97%以上 ;采用药量 6 0 0～ 90 0g/hm2 进行常规喷粉 ,虫口减退率达 90 %以上 。
The experiments were conducted in Larix principis-rupprechtii plantations from Aug. to Sep. in 2001 in Keshiketeng Banner Huamugou forestry farm in Chifeng city. The results indicated that: the effects of prevention and control of Dendrolimus superans were remarkable by using 20% Mie'A wettable powder to conduct common spray and dust sprinkling on the surface of fields. The decreasing rate of Dendrolimus superans was over 97% by using the dosage of 450-750 g·hm -2 of chemicals to conduct common spray; the decreasing rate of Dendrolimus superans was over 90% by using the dosage of 600-900 g·hm -2 of chemicals to conduct common dust sprinkling; the control effect of common spray was better than common dust sprinkling.
出处
《辽宁林业科技》
2002年第4期6-7,38,共3页
Liaoning Forestry Science and Technology
关键词
20%灭·阿可湿性粉剂
防治
落叶松毛虫
试验
Mie'A wettable powder, prevention and control, Dendrolimus superans, experiments
