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利用害虫天敌来防治害虫是植物保护的一个组成部分,我所从1972年开始,应用赤眼蜂防治稻纵卷叶螟的研究。1973年放蜂115亩防治稻纵卷叶螟平均卵寄生率为54%;1974年放蜂155亩,平均卵寄生率上升到81.17%;1975年放蜂1252亩,有765亩(占放蜂面积的60.38%)在防治标准之下;1976年放蜂1026亩,有64.62%面积在防治标准之下。用赤眼蜂防治稻田虫害若能抓住环节,一般寄生率可达70～80%。现阶段由于纵卷叶螟
The use of natural enemies of pests to control pests is an integral part of plant protection, I started from 1972, the application of Trichogramma control of rice leaf roller research. In 1973, 115 mu of bee pollen had been used to control the average egg parasitism rate of rice leafroller with 54%. In 1974, 155 mu of bee was put and the average egg parasitism rate rose to 81.17%. In 1975, 1252 mu of bee was put and 765 mu Area of 60.38%) under the prevention and control standards; in 1976, 1026 acres of bees, 64.62% of the area under the prevention and control standards. Trichogramma control of rice fields with pests if they can seize the link, the general parasitic rate of up to 70 ~ 80%. At this stage due to leafroller