防治效果 1.卵寄生率显著提高。田间释放一定量的赤眼蜂,卵寄生率迅速提高,同时随着单位面积内放蜂量的增加,卵寄生率也随之增加。据姜灶、兴仁及县农科所等单位的调查,每亩放蜂一万头的卵寄生率为62.5％,每亩放蜂一万四千头的卵寄生率为72.7％,每亩放蜂一万七千头的卵寄生率为84.7％,而对照区 Control effect 1. The egg parasitic rate increased significantly. In the field, a certain amount of Trichogramma was released, and the parasitism rate of the eggs increased rapidly. Meanwhile, the parasitism rate of the eggs increased with the increase of the bee amount per unit area. According to surveys conducted by Jiangzao, Xingren and the county agricultural institutes, the parasitization rate of eggs with 10,000 eggs per mu was 62.5%, and the parasitization rate of eggs with 14,000 heads per mu was 72.7% Put eggs 17000 eggs parasitism rate of 84.7%, while the control area