瓜棉套种棉花黄萎病发生原因及生物防治

Causes and Biotic Control over Cotton Wilt in Interplanting Watermelon and Cotton

棉花黄萎病是棉花生产为害最重的病害之一。在棉花生产上，瓜棉套种棉花由于播种早、前期肥水多，利于棉花黄萎病早发生。棉花生长中期连降暴雨，易造成棉花黄萎病大发生。若用不同药剂组合进行防治，即可控制其为害，促进棉花生长，提高产量。

Cotton wilt is one of the most harmful diseases in the cotton production. Cotton plants are sowed earlier, have more fertilizer and water on early days. While they grow quickly,cotton wilt will easily happen. Moreover, they have lots of rains in the middle of their growth, which causes cotton wilt to happen seriously. Different combination of medicament can be used to control the disease, promote the cotton growing and increase the yield.