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近年来,地膜覆盖植棉技术在我省正处逐步示范、推广阶段。试验证明,这是提高棉花产量的一项有效措施。随着地膜覆盖植棉技术的不断应用,使棉田生态环境得到了综合性的改善,从而在害虫方面将会发生新的变化。为了不误时机地掌握虫情,做到适时防治,笔者依据地膜覆盖后的棉田生态环境诸因子的变化状况和调查结果,举例分析了棉虫消长的原因,供参考。一、地膜覆盖后棉田生态环境的变化棉田生态环境,大体包括以棉株为主体,土壤、水分、温湿度、光照,以及害虫与天敌等因子。主要变化包括:
In recent years, plastic film mulching cotton technology in our province is being gradually demonstration, promotion stage. Test proved that this is an effective measure to increase cotton production. With the continuous application of plastic film mulching cotton technology, cotton ecological environment has been comprehensively improved, so that new changes will occur in pests. In order to grasp the insects and control the insect timely and timely, the author analyzed the reasons for the growth and decline of cotton insects based on the changing conditions and the survey results of ecological factors of cotton fields after mulching. First, the changes in cotton ecological environment after mulching Cotton fields ecological environment, including cotton as the main body, soil, moisture, temperature and humidity, light, and pests and natural enemies and other factors. The main changes include: