Head smut is a systemic disease that harms tassels and ears of corn. The affected plants are dwarfed, burrowed, and clustered. Occurrence pattern: Corn smut is commonly called “gray bag†and it usually shows symptoms after tasseling. The diseased schistosomiasis formed on the female or tassel or on stems and leaves. After the rupture of the outer membrane, a large amount of black powder (thick plague spores) was released and overwintered. Seeds and fertilizers contaminated with black powder can also spread the disease. The spores invade the coleoptiles during germination of the seeds. The longer the seeds are sown and the longer the emergence, the more serious the disease is. In the spring when the low-temperature and drought emerged for a long time, it was more susceptible to disease and was the main disease affecting maize yield. Control methods:: 1 selection of disease-resistant varieties, seed selection, timely sowing; 2 should pay attention to remove the diseased plants, concentrated burning, do not use organic fertilizer, to prevent the spread of black powder; 3 sub-belt rotation to reduce bacterial infection, increase Potassium fertilizer is used to increase the disease resistance of corn. 4 Chemical control: The most effective method is to use 0.3 ～ 0.4% of seed weight (2.5 g per acre and 7 g per acre seed) in the day before sowing. above 95. This method also has obvious control effect against bacterial wilt and sheath blight. Wound Repair,wound healing,scar repair Wound Repair,Adhesions Wound Repair,Wound Care Bandages,Wound Healing Bandages Zhejiang Lanhine Medical Products Ltd. , https://www.lanheyiliao.com