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一、赤眼蜂的治虫效果 1975年,我们在100亩棉田上释放松毛虫赤眼蜂Trichogramma dendrolimi Matsumura防治第三代棉铃虫的试验,取得可喜的效果。当时百株棉铃虫卵量为117粒,每亩放蜂40000头后,百株残留虫量平均为9.3头,蕾铃被害率为1.5％;而药剂防治的田块百株残留虫量为15.6头,蕾铃被害率为3.3％。此后,放蜂面积从1976年的900亩,发展到1980年的14045亩,后由于冷藏设备问题,使放蜂面积有所减少,1981年为6880亩,1982年为1100亩。几年来利用赤跟蜂防治的对象从棉铃虫扩大到玉米螟、黄地老虎、桃蛀螟、稻纵卷叶螟。1975～1982年的试验表明,育蜂洽虫具有比较理想的效果。
Trichogramma worm effect In 1975, we released Trichogramma dendrolimi Matsumura Trichogramma Trichogramma on the 100 acres of cotton fields to control the third generation of cotton bollworm trials, and achieved gratifying results. At that time, the number of eggs per boll bollworm was 117, with 40000 heads per acre, the average number of parasites per hundred was 9.3, and the damage rate of buds was 1.5%. However, the number of residual parasites per hundred was 15.6 Head, Lei Ling victimization rate was 3.3%. Since then, the area of bee-eaters has grown from 900 mu in 1976 to 14045 mu in 1980, and the number of bee-eaters decreased afterwards due to problems of refrigerating equipment. In 1981, it was 6880 mu and in 1982, it was 1,100 mu. Over the past few years the object of the use of red heel bee to control from the bollworm to corn borer, yellow tiger, moth borer, rice leaf roller. From 1975 to 1982, the test showed that bugs and worms had the ideal effect.