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我校实习农场的苹果树,1954年由于桃小食心虫的为害,损失很大,为害率高达81%。1955和1956两年,加强和改变了防治措施,被害率由1955年的43%降低到1956年的0.78%。通过1956年的防治,做了初步的分析和总结,兹介绍如下:一防治经验桃小食心虫的生活习性很复杂,但也有一定的规律。所以在防治措施上必须弄清楚它的生活规律,找其薄弱的环节(出土幼虫,蛹化茧,卵,扎果前的幼虫)进行防治,才能收到显著的效果。1.树干周围地面撒6%可湿性666粉,对消灭出土幼虫的效果,
Apple tree in our school internship farm, in 1954 due to the peach moth damage, a great loss, the damage rate as high as 81%. In 1955 and 1956, prevention and control measures were strengthened and changed. The rate of victimization dropped from 43% in 1955 to 0.78% in 1956. Through 1956 prevention and treatment, made a preliminary analysis and summary, it is introduced as follows: A pest control experience Peach insects habits are complex, but there are certain rules. So in the prevention and control measures must be clear about its laws of life, to find its weak links (unearthed larvae, pupal cocoon, eggs, pre-fruiting larvae) for prevention and treatment in order to receive significant results. 1. Spread around the trunk 6% wettable 666 powder, to eliminate the effect of unearthed larvae,