绵腐病俗称霉病,是温室无土秧的大敌,它多发生在谷粒发叉至现青期。发生绵腐病的秧苗长有白色绵毛状物,严重时秧苗和根部白色绵毛状物连成一块,秧苗矮小黄瘦,根少且短细,有的地方有粘液,有的地方很干燥。过去常用硫酸铜防治绵腐病,但是我们有个生产队在此病为害严重时,采用1％硫酸铜液喷秧苗和洗根仍不见效,使整个温室的秧苗损失80％以上。根据测定,病秧根部水分酸性较大,我们采取以防为主的办法,从播种至现青期用草木灰水和洗衣粉 Muck rot commonly known as mold, is the enemy of the greenhouse without soil seedlings, it occurs in the grains fork to the current youth. Occurred in the cotton seedlings grow white hairy hairy material, in severe cases, the roots and white feather like a piece of seedlings, short and thin yellow, thin roots and short, and some places have mucus, and some places are very dry . In the past, copper sulphate was used to control cotton rot, but when we had a production team that was severely affected by the disease, spraying seedlings and roots with 1% copper sulphate solution remained ineffective and caused more than 80% loss of seedlings throughout the greenhouse. According to the determination, the root of the disease seedling water is more acidic, we take to prevent the main approach, from sowing to current youth with ash and detergent