我省主产棉区植棉历史较长,随着美棉的引入,棉花枯、黄萎病逐渐发生。据调查,汉中盆地、关中平原、渭北高原及高寒棉区均有不同程度的发生。以泾惠灌区及渭惠渠下游最重,渭惠灌区次之,洛惠灌区较轻,其他地区点片发生。全省400万亩棉田中,发病面积约在百万亩以上,并有逐渐扩大的趋势。棉枯萎病对棉花危害极大,轻染病者减产,重者大片死苗,基本无收,严重地影响了棉花的产量及品质。枯、黄萎病严重的社、队甚至不能完 The main cotton producing area in our province has a long history of cotton planting. With the introduction of U.S. cotton, the withered and verticillium wilt occur gradually. According to the survey, the Hanzhong Basin, the Guanzhong Plain, the Weibei Plateau and the alpine cotton area all have different degrees of occurrence. The Jinghui irrigation area and the Weihe drainage channel are the heaviest in the downstream, and the Weihui irrigation area is the second, while the Luohui irrigation area is lighter, and the other areas are spotted. The province’s 400 million mu of cotton fields, the incidence of about more than one million mu, and there is a gradual expansion of the trend. Fusarium wilt is extremely harmful to cotton, and the yield of light-infected patients is reduced. In the case of large-sized dead seedlings, cotton fodder is basically unharmed, which seriously affects the yield and quality of cotton. Withered, Verticillium serious community, the team can not even finish