一、菊花常见病害的防治 1、斑点病。菊花的斑点病有黑斑病、褐斑病、轮斑病和斑点病等,都是由病菌寄生引起的。通常在7月中旬前后出现,尤其是连日阴雨、积水久湿、昼夜温差大时,最容易较大面积发作,其中最多的是褐斑病。 First, the prevention and treatment of common diseases chrysanthemum 1, spot disease. Chrysanthemum spot disease black spot disease, brown spot disease, spot disease and spot disease, are caused by parasites. Usually around mid-July appear, especially in the rainy days, a long wet water, large temperature difference between day and night, the most easy to attack a large area, most of which is brown spot disease.