棉花枯萎病和黄萎病是棉花的两种主要病害。本地自 1 964年传入以来 ,其扩展趋势为 60～ 70年代零星点片发生 ,80年代成片发生 ,90年代普遍发生 ,目前呈快速扩展加重态势。2 0 0 4年 6月上旬 ,据当地农技人员反映 ,棉花枯、黄萎病在各地大发生 ,其发生趋势是近 1 0年来最严重的 Cotton Fusarium wilt and Verticillium wilt are two major diseases of cotton. Since the introduction of the local in 1964, the trend of expansion has been the sporadic occurrence in the 1960s and 1970s, the occurrence of sporadic spots in the 1980s, the widespread occurrence in the 1990s and the rapid expansion at present. In early June 2004, according to the reports of local agricultural technicians, cotton blight and verticillium wilt occurred in various places and the trend was the most serious in recent 10 years