浙江棉区集中于杭州湾和钱塘江两岸,其次为东部沿海地区。这里气候温和,雨量充沛,土质疏松,植被常青,适于棉花种植,但亦有利于病害的发生。近年来,棉田普逼实行粮棉间作套种,两熟矛盾突出,棉花苗期病害尤为严重。棉花苗期正是春夏之交。此时我省多数年份春雨、霉雨连绵,寒流、低温交错,棉苗套种于前作行间,阳光不足,田间湿度较 Zhejiang cotton area concentrated in the Hangzhou Bay and Qiantang River, followed by the eastern coastal areas. Here a mild climate, abundant rainfall, loose soil, vegetation, evergreen, suitable for cotton cultivation, but also conducive to the occurrence of disease. In recent years, the implementation of cotton Pugu interplanting grain and cotton intercropping, two conflicts prominent, cotton seedling disease is particularly serious. Cotton seedling is the turn of the spring and summer. At this point in most of the province in spring rain, rainy, continuous, cold, staggered stagnation, interplanting cotton seedlings in the intercropping, lack of sunlight, field humidity