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调查了放蜂蔗区和对照蔗区的蔗螟卵块寄生率、卵粒寄生率、螟害株率和螟害节率。结果表明,放蜂区二点螟螟虫卵块寄生率和卵粒寄生率均为80%以上;而对照区的卵块寄生率和卵粒寄生率则均低于50%。放蜂区的螟害株率(30.80%)比对照区的螟害株率(40.00%)低9.20个百分点;螟害节率(4.19%)比对照区的螟害节率(8.48%)低4.29个百分点。螟黄赤眼蜂对二点螟有较好的控制效果。
The parasitism rate, the parasitism rate of ovum, the rate of stem borer and the rate of stem borer were investigated in the sugarcane burrow area and the control sugarcane area. The results showed that both the parasitism rate and the parasitism rate of oviposition were more than 80% in egg-laying area and less than 50% in the control area. The percentage of stem borer (30.80%) in the bee-eaters was 9.20% lower than that in the control area (40.00%). The mortality of pests (4.19%) was lower than that of the control (8.48%) 4.29 percentage points. Chilo suppressalis has a better control effect on the rice borer.