近几年来,棉花凋枯病在孝感县发展很快,发病面积很大,是影响棉花高产稳产的主要病害之一。我们在孝感县病虫测报站的领导和指导下,进行了初步的调查和施肥试验,简报如下。一、病状六月中、下旬开始发病,发病初期,中、下部叶片呈现脱肥现象,叶脉间普遍变为较正 In recent years, cotton blight developed rapidly in Xiaogan County, the incidence of a large area, is one of the major diseases affecting high and stable yield of cotton. We Xiaogan County Pest Report Station under the leadership and guidance, conducted a preliminary survey and fertilization test, the briefing is as follows. First, the disease in mid-June, late onset, early onset, middle and lower leaves appear de-fertilizer phenomenon, generally become more positive between the veins