玉米螟发生为害部位隐蔽，防治适期短且正值植株高大的大喇叭口时期，使用一般化学防治方法的效果较差，实施难度较大，很多地方的实践说明，采用赤眼蜂防治是一个行之有效的方法。顺义区自１９７６年以来，年年从东北地区购进柞蚕茧，经羽化、产卵繁育松毛虫赤眼蜂防治玉... Corn borer damage occurs when the hidden parts of the prevention and treatment of short duration and positive plant tall trumpet period, the use of general chemical control methods less effective implementation of the more difficult, the practice in many places, the use of Trichogramma is a Effective method. Shunyi District since 1976, every year from the purchase of tussah cocoon in the northeast region, the feathering, spawning broodstock Trichogramma prevention and control jade ...