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六十年代初期我省就开展过利用赤眼蜂防治玉米螟的研究,但未用于生产实践。1974年关中棉区各地(市)在先一年省棉研所试验的基础上同时开展了利用赤眼蜂防治棉铃虫的试验示范工作。尽管利用赤眼蜂治虫和利用瓢虫、细菌农药相比,存在着养蚕繁蜂比较麻烦、成蜂不耐贮存不耐干旱等缺点,但利用面积逐年大幅度增加。1974—78年年放蜂治虫面积为1,575亩,16,517亩,40,984亩,85,600亩,154,500亩,78年比74年增加近百倍。养蚕繁蜂放蜂技术逐步提高,防治效果稳定在
Early 1960s, our province has carried out the use of Trichogramma ostriniae control studies, but not for production practice. In 1974, all provinces (cities) in Guanzhong area carried out experiment and demonstration work on the control of cotton bollworm (T. Although the use of Trichogramma worm and the use of ladybugs, bacterial pesticides, compared with the existence of silkworm bumble bee cumbersome, intolerant intolerance storage drought drought and other shortcomings, but the use of a substantial increase year by year. In 1974-78, the beekeeping area was 1,575 mu, 16,517 mu, 40,984 mu, 85,600 mu and 154,500 mu, respectively, an increase of nearly 100 times over the previous 78 years. Sericulture bee bumblebee bee technology gradually increased, prevention and control effect is stable at