棉花苗期病害的发生与防治棉花苗期病害包括播种以后至现蕾前发生的病害。在河南省主要有根病类的红腐病、炭疽病、立枯病及叶病类的黑斑病等多种。河南农业大学８０年代在９个地市棉区调查结果表明，病苗率平均７２％，严重的超过９０％，死苗率７％～１０％。覆盖地膜的... Occurrence and control of cotton seedling diseases Cotton seedling diseases include sowing after the disease occurred before budding. In Henan Province, there are mainly root rot of red rot, anthracnose, blight and leaf blight black spots and other species. Henan Agricultural University in the 1980s in 9 cities in the cotton area survey results showed that the average rate of 72% of the disease vaccine, severe more than 90%, dead seedlings rate of 7% to 10%. Cover the film ...