摘要
落叶松叶蜂是危害华北落叶松的重要害虫,在内蒙古乌兰察布盟地区一年发生一代,以预蛹在茧内越冬。林分郁闭度在0.6以上时,用烟雾剂0.75kg/mu防治2—3龄幼虫,效果达70.1—83.2％;25％灭幼脲Ⅲ号20—30g/mu低容量喷雾防治2—3龄幼虫,效果81.1—95.5％;人工搂树盘暴露越冬预蛹,效果95.9％。
The larch sawfly Pristiphora erichsonii(Htg) is an impartant pest in North China larch(Larix principis rupprechtii Mayr). It has one generation a year in Ulanqab League, Inner Mongolia Autonomous Region and overwinters as prepupa in the soil or under the litter. When the canopy density of the larch stand is above 0.6, the use of aerosol at the rate of 0. 75kg/mu to control the larvae of 2—3 instars reached 70.1—83.2％ mortality. The use of 25％ Diflubenzuron Ⅲ at 20—30 g/mu by low volume spray in controlling 2—3 instars larvae reached 81.1—95.5％ mortality. Digging the soil around the base of the tree in order to expose the overwintering prepupae reached 95.9％ mortality.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1992年第4期317-322,共6页
Scientia Silvae Sinicae
关键词
叶蜂科
叶蜂
落叶松
害虫
防治
Symphyta
Tenthredinidae
Nematinae
Sawfly
The larch sawfly Pristiphora erichsonii
