澳大利亚的研究表明，造成棉花苗病、黑根腐病、黄萎病、枯萎病、黑斑病、角斑病和棉铃疫病的病原体在被侵染的作物残体中从上季到下季能全部存活下来。（１）苗病。苗病是由丝核菌属和腐霉属造成的，在任何地区都能发生，而且棉田间、季节间的严重程度差异较大。作物残体... Studies in Australia have shown that pathogens causing cottonseed disease, black root rot, Verticillium wilt, Fusarium wilt, black spot disease, angular leaf spot and bollworm blight can infect infected crop residues from the previous season to the next season All survived. (1) Miao disease. Miao disease is caused by Rhizoctonia and Pythium, can occur in any area, but also between the cotton fields, seasons vary greatly in severity. Crop residues ...