摘要
利用赤眼蜂防治第1代马尾松毛虫,在长兴县已有近20年历史。经调查,当越冬代马尾松毛虫虫灾级为3～4级时,在第1代卵期,放赤眼蜂360万头/hm^2,可以控制松毛虫当年的危害;年材积生长量放蜂区比对照区增加2.4m^3/hm^2,两者差异极显著。
Oophagous trichogrammae has been used to control the first generation of pine caterpillar for 20 years in Changxing county.Oophagous trichogrammae was put into pine forests at the first generation ovum period of overwintering pine caterpillar whose plague grade was Ⅲ or Ⅳ. Its population was 3.6 million per hectare. Thus the piae caterpillar could be effectively controled. The volume increment per year per hectare in the district with oophagous trichogrammae was 2.4 cubic meters more than that in the comparison one.
出处
《浙江林学院学报》
CSCD
1990年第3期289-291,共3页
Journal of Zhejiang Forestry College
关键词
马尾松毛虫
赤眼蜂
防治
oophagous trichogrammae (Trichogramma dendrolimi Matsumura)
pine caterpillar (Dendrolimus punctata Walker)
annual increment
control
