棉花枯黄萎病为检疫性病害,可造成大面积的棉株死亡,蕾铃脱落,严重影响了棉花的正常生长,是当前对棉花危害最重的病害。其发生之快,令人堪忧,如1997年全国普查时发病面积占棉田总面积的12%,而到2007年迅速发展到50%—60%。任丘市最早以南部乡镇为主要发生区。由于抗虫棉对枯黄萎病尤其是黄萎病抗性较差,随着长时间连作和气候因素的影响,加之 Verticillium wilt of cotton is a quarantine disease, which can cause cotton plant to die in large area and shed light buds, seriously affecting the normal growth of cotton and is currently the most damaging to cotton. The rapidity of its occurrence is worrisome. For example, the area covered by the national census in 1997 accounted for 12% of the total area of ​​the cotton field and rapidly expanded to 50-60% in 2007. Renqiu City, the earliest to the southern towns as the main area. As the resistance of cotton to Verticillium wilt, especially Verticillium wilt is poor, with prolonged intercropping and climatic factors, coupled with