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近十多年来, 吉林省通化市推广育蜂治螟,累计防治面积近百万亩。但由于育蜂靠国家投资,放蜂不收费,影响了这项措施的扩展,防治面积逐年减少,螟害率回升,以致玉米产量损失率达10～18％。 为了扭转这一局面,经吉林省植保站倡导,由通化市农科所、梅河口市农科站、双兴乡农科站组成科研、生产联合体,扶助赤眼蜂科技专业户繁蜂,并实现一户包一乡放蜂任务,因此,1985～1986年放蜂面积达到20万亩。放蜂地玉米螟卵块寄生率为66.6％;卵粒寄生率
In the past ten years or so, Tonghua City, Jilin Province has been promoting bee-pollinators and has accumulated nearly one million mu of control area. However, as the breeding of domestic bee by national investment, put the bees free of charge, affecting the expansion of this measure, control area decreased year by year, the rate of stem borer recovery, resulting in corn yield loss rate of 10 to 18%. In order to reverse this situation, advocated by Jilin Plant Protection Station, scientific research and production consortium will be formed by Tonghua Agricultural Science Institute, Meihekou Agricultural Science Research Station and Shuangxing Rural Science Research Station, and to assist Trichogramma science and technology professionals Achieve a task of a pack of rural areas beekeeping, therefore, 1985 ~ 1986 bee area reached 20 million mu. The parasitism rate of eggplant corn borer was 66.6%;