我场有8～9年生马尾松幼林5000亩。自一九七○年开始发生松毛虫为害,一九七一年开始进行利用赤眼蜂防治松毛虫的试验,去年第三代卵期放蜂20亩,寄生率达81.61%,取得了小面积育蜂治虫的初步成功。今年,我场松毛虫为害发展到猖獗高蜂期,全部松林都有虫,越冬虫口调查,普遍在20～30条/株,最高达70～80条/株以上。在这样高虫口的情况下,能不能用赤眼蜂代替农药 My field has 8 to 9 years old masson pine forest 5000 mus. The pine caterpillars have been devastating since 1970 and the prevention and treatment of pine caterpillars by trichogramma was started in 1971. In the third generation of ovums last year, 20 mu of bee-pollinators were born with a parasitic rate of 81.61% and a small area The initial success of beekeeping worms. This year, my field of pine caterpillar damage developed to rampant high bee period, all pine forests are insects, overwintering insect population survey, generally in the 20 ~ 30 / up to 70 ~ 80 / plant above. In such a high insect population, can not use trichogramme instead of pesticides