棉田玉米螟发生危害及综合治理效果的调查研究

The Harm of Corn Borer Occuring in Cotton Fields and Investigation on Effect of Muti-Management

1984～1988年对河南豫北地区棉田一代玉米螟发生危害和综合治理研究结果表明:一代玉米螟在棉田的发生时期与玉米田基本吻合,5月下旬至6月初为产卵盛期,6月中旬末卵已濒于绝迹,6月上旬为幼虫危害高峰期.不同类型棉田发生危害的严重程度依次为棉麦套种>地膜覆盖>春直播>更直播棉田.此外,本文还对各类棉田采取相应防治措施的效果进行了研究.

According to the studies of 1984~1988 in the area of Northern Henan ,the results about harm of the first generation corn borer occuring in cotton field and muti-management showed that the period of the first generation corn borer occuring in cotton fields coincided with that in corn fields basiclly. Egg producing peak was from late May to the beginning of June and worm harm Peak was in early June . The harm degree of corn borer in different kinds of cotton field was interplant cotton with wheat ,covering with plastic paper,sowing in Spring ,sowing in cotton field in Summer . Besides .the effects of management measures used in kinds of cotton field were studied.