棉花营养钵育苗,如采用乙草胺播后芽前除草,极易出现药害,其症状与棉苗立枯病症状相似,均表现幼茎呈现黄褐色斑,严重时棉苗死亡。在生产上应予以区别诊治。一、发病症状 Cotton nutrition Bowl nursery, such as the use of acetochlor sowing after weeding buds, prone to injury, the symptoms and symptoms of cotton seedling blight are similar, all showed young stained brown spots, cotton seedlings died in severe cases. In the production should be treated differently. First, the onset of symptoms