今年石家庄地区在棉花定植前后,遭遇降雨和低温,棉花普遍发生病害,发生不同程度的病苗和死苗。我们通过调查访问,分析原因如下:一、五月下旬藁城县农场棉花死苗原因分析当五月廿八日我们到达县农场的时候,棉苗的子叶和真叶,普遍发生了很多病斑, Shijiazhuang this year before and after cotton planting, suffered rainfall and low temperature, cotton diseases generally occur, varying degrees of disease and dead seedlings. We interviewed through the survey, the analysis of the reasons are as follows: First, the late May Tancheng County farm cotton seedling reason analysis When we arrived on May 28 when the county farms, cotton seedling cotyledons and true leaves, a lot of widespread lesions ,