论文部分内容阅读
湖北省石首市是全国的商品棉基地之一,由于多年棉麦套种和新品种引进,棉区逐步成了棉枯黄萎病的重病区,据调查,棉枯黄萎病的发病面积由70年代零星发病的2000多亩,近几年扩展到80000多亩,占棉田面积的61.6%,1987年改种棉田8300亩损失重
Shishou City, Hubei Province, is one of the country’s commodity cotton bases. Due to the introduction of many years of cotton-wheat intercropping and new varieties, the cotton area has gradually become a serious wilt area of cotton wilt. According to the survey, the area of the disease caused by verticillium wilt increased from 70s 2000 mu of sporadic disease, in recent years expanded to 80,000 mu, accounting for 61.6% of the area of cotton fields, in 1983 8300 acres of cotton crop loss weight