山东省植棉面积约2160万亩,约占全国植棉面积的1/4和黄淮海地区植棉面积的1/2左右。全省棉田主要分布于西北部.1991年7月12～25日,我们到德州、聊城、济宁、惠民四个地区进行考察,发现棉花作物布局及农田生态环境系统已有了一些新的变化,进而影响到棉田害虫种群动态和棉花病害的发生变化,值得今后测报和防治工作中予以注意.一、棉田生态系统的多样化复杂化 Shandong Province, about 21.6 million mu of cotton area, accounting for about 1/4 of the national cotton area and the area of ​​cotton in the Huang-Huai-Hai area about 1/2. The cotton fields in the province are mainly distributed in the northwestern part of China. From July 12 to July 25, 1991, we went to investigate four areas of Texas, Liaocheng, Jining and Huimin and found that there have been some new changes in cotton crop layout and farmland ecological environment system , And then affect the dynamics of cotton pest population and the occurrence of cotton disease changes, it is worth to pay attention to in the future newspaper and prevention and control work.One, the diversity of cotton ecosystem complexity