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利用赤眼蜂携带棉铃虫ＮＰＶ病毒防治第２、３、４代棉铃虫,以万灵、甲胺磷化学杀虫剂防治作对照。结果显示:赤眼蜂对棉铃虫卵的寄生率平均为３３．３%。最高达到３７．３%;棉铃虫幼虫病毒感染死亡率为６１．３%到７０．６%;赤眼蜂带病毒防治田天敌数量、种类明显多于化学杀虫剂防治田,瓢虫、蜘蛛、小花蝽平均百株数量比化学杀虫剂防治田分别高８３．６%、１００．８%、６９．２%,在赤眼蜂带病毒防治田存在的草蛉、猎蝽等捕食性天敌在化学杀虫剂防治田未发现:赤眼蜂带病毒防治田平均虫口减退率为６６．１９%,化学杀虫剂防治田为７０．２５%,差异不显著(ｐ＝０．０５);赤眼蜂带病毒防治田棉花的平均花蕾虫害率为３５．９７%与化学杀虫剂防治田的３４．９３%差异也不显著(ｐ＝０．０５)。
The trichogramma beehive NPV virus was used to control the 2nd, 3rd and 4th generations of cotton bollworm, and the control of all pesticide and methamidophos pesticide was used as a control. The results showed that the parasitism rate of Trichogramma on the cotton bollworm eggs was 33.3% on average. Up to 37.3%. The mortality rates of Helicoverpa armigera larvae virus infection were 61.3% to 70.6%. The numbers and types of natural enemies of Trichogramma virus were significantly more than that of chemical pesticides, ladybugs, spiders , And the average number of stinkbugs per 100 plants was 83.6%, 100.8% and 69.2% respectively higher than that of chemical pesticides. The predatory enemies such as weeds and bugs in Trichogramma virus control field In the field of chemical insecticides control, the average reduction rate of the population of Trichogramma virus was 66.19% and that of chemical pesticides was 70.25%, the difference was not significant (p = 0.05). The average flower bud rate of cotton with Trichogramma virus was 35.97% and that with chemical pesticides was 34.93%. The difference was not significant (p = 0.05).