1984年,有些棉区出现因苗病而补种的现象,严重地块补种达三次之多。还有些地区的出苗率仅在25％左右,值得注意。常见棉苗病害有立枯病、炭疽病、红腐病、黑斑病、茎枯病,褐斑病和枯萎病等。局部发生的有猝倒病、白娟病、枯腐病、印度炭疽病、疫病和黑根腐病等。苗病的发生与发展正在引起关注,现根据各地经验提出以种子处理为主的苗病综合防治措施供参考。 一、农业防治 棉田冬前深翻土地8寸至1尺,以利减少越冬菌源;播前及时耙磨,使土壤疏松,不利病菌繁殖。北方棉区宜冬灌,以避免苗 In 1984, there were cotton replanting practices in some cotton areas, and grafting was severely blocked up to three times. In some areas, the rate of emergence is only about 25%, which is worth noting. Common cotton seedling disease blight, anthracnose, red rot, black spot, stem blight, brown spot and wilt disease. Dust catches local diseases, Baijuan disease, withered rot, Indian anthracnose, blight and black root rot. The occurrence and development of seedling disease are arousing more concern. Now we put forward the comprehensive prevention and cure measures of seedling disease based on the experience of different places. First, the agricultural prevention and control of cotton fields before the winter deep turning 8-inch to 1 foot, in order to reduce the source of overwintering; sowing before grinding in time to make the soil loose, unfavorable bacteria breeding. Northern cotton should be irrigated in order to avoid seedlings