豫西棉区包括16个县、市,植棉始于宋末元初,历史悠远。解放后,六十年代至八十年代初,常年种植棉花90多万亩,在棉花生产上取得了很大成绩,对支援国家建设,提高群众生活水平起了重要作用,是豫西的重要经济作物之一。然而棉花枯、黄萎病的发生蔓延,已成为当前棉花生产上的一大障碍,尤其是枯萎病在局部地区已发展成毁灭性灾害. 一、棉花枯、黄蒌病的发生 1953年在灵宝县大王乡小南朝曾发现4株黄萎病株。追溯其源是1935年旧政府由美国调进大量斯字棉4B引起。当时对棉种未作杀菌处理即在陕、晋、冀、鲁、豫等省种植,以后这些地方都程度不同的发生了枯萎病和 Cotton fields in western Henan include 16 counties, cities, cotton began in the late Song and Yuan Dynasties, long history. After the liberation, from the 1960s to the early 1980s, more than 900,000 hectares of cotton were planted throughout the year, making great achievements in cotton production and playing an important role in supporting the construction of the country and raising the living standards of the masses. It is also an important economic One of the crops. However, the spread of cotton withered and verticillium wilt has become a major obstacle in the current cotton production, especially the wilt disease has developed into a devastating disaster in some areas. Wang Xiaoxiang County, Po County has found 4 strains of Verticillium wilt. Traced back to its source was the 1935 government by the United States transferred a large number of Si Gumi 4B caused. At that time, cotton varieties were not sterilized, that is, they were planted in Shaanxi, Shanxi, Hebei, Shandong and Henan provinces. After that, the occurrence of Fusarium wilt