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研究表明,螟黄赤眼蜂对新疆南部棉区棉铃虫的控制作用优于松毛虫赤眼蜂;田间放蜂量6×104～8×104头/667m2、放蜂点为3～6个/667m2,螟黄赤眼蜂最高寄生率达51.49%,累计寄生率为18.67%～44.02%,平均寄生率30.36%,棉铃虫虫口减退率25.3%～64.2%,蕾铃被害减退率46.8%～76.8%,赤眼蜂对新疆棉田棉铃虫具有明显的控制作用;同时,持续放蜂田天敌数量明显高于化防田,表明持续放蜂生态效应显著。
The results showed that the control effect of Trichogramma ostriniae on Helicoverpa armigera was better than that of Trichogramma dendrolimi in cotton field in the southern part of Xinjiang. The amount of bee venom was 6 × 104 ~ 8 × 104 / 667m2 in field and 3 ~ 6 / The highest parasitism rate was 51.49%, the total parasitism rate was 18.67% ~ 44.02%, the average parasitism rate was 30.36%, the reduction rate of cotton bollworm population was 25.3% ~ 64.2%, the reduction rate of buds was 46.8% ~ 76.8 Trichogramma had obvious control effects on cotton bollworm in cotton field in Xinjiang. At the same time, the number of natural enemies in the field was significantly higher than that in the field, indicating that the ecology effect was significant.