1986至1989年,我们引进松毛虫赤眼蜂,在蒙阴、临沐石门两处园艺场进行防治示范,放蜂面积1580亩,效果良好。 苹小卷叶蛾 越冬代成虫羽化盛期至第一代卵期(6月上中旬)放蜂,每隔5—6天放1次,共放4次,平均每次每亩34776头。据在蒙阴调查卵块寄生率100％,卵粒寄生率94.6％,“苹小”虫果率平均为0.7％。(对照区为10.8％),虫口残留密度由每株29.7头压低到4.2头。 From 1986 to 1989, we introduced trichogramma dendrolimus to prevent and control the two horticultural fields in Mengyin and Linhushimen, putting the area of ​​1,580 mu of bee on a good scale. The apple budworm overwintering on behalf of the adult feathering period to the first generation of oviposition (mid-June) beekeeping, every 5-6 days put a total of 4 times, an average of 34776 acres per acre. According to the investigation in Mengyin 100% egg mass, egg parasitic rate of 94.6%, “small apple” fruit rate of 0.7% on average. (Control area was 10.8%), the population density of insect population decreased from 29.7 to 4.2 per plant.