摘要
为了探索有效的油松毛虫生物防治方法,笔者在山西省阳泉市狮垴山林场开展了林间释放松毛虫赤眼蜂防治油松毛虫试验。结果表明,3种放蜂密度的虫口减退率均在85%以上,显著高于对照。其中,以8×104头/hm2放蜂密度的控制效果最好;3种放蜂密度的防治效果均在80%以上,防治效果为:虫口密度8×104头/hm2>3×104头/hm2>5×104头/hm2,说明松毛虫赤眼蜂对油松毛虫具有很好的控制作用。
Controlling D.tabulaeformis by releasing Trichogramma dendrolimi in forest was studied in Shinaoshan forest farm in Yangquan City of Shanxi Province to explore effective method to control D.tabulaeformis.The results showed that, decline rates of three kinds density population were above 85%, significantly higher than the control area , among them, the best control effect was 8 ×104 head/hm2 density; control effects of three densities were above 80%, 8 ×104 head/hm2 ＆gt;3 ×104 head/hm2 ＆gt;5 ×104 head/hm2 , which showed Trichogramma dendrolimi had a good control effect on D.tabulaeformis.
出处
《山西林业科技》
2015年第2期5-6,共2页
Shanxi Forestry Science and Technology
关键词
油松毛虫
松毛虫赤眼蜂
虫口密度
虫口减退率
防治效果
D. tabulaeformis
Trichogramma dendrolimi
Population density
Decline rate
Control effect
