小麦黑穗病主要有散黑穗病、腥黑穗病,其侵染源主要为带菌的种子、土壤和粪肥,属于苗期侵染型,只侵染1次。预防发生的方法是播前拌种。1 小麦拌种的方法1.1 小麦种子50公斤加6％立克秀或12.5％特谱唑20～25克,水0.5～1公斤。1.2 小麦50公斤加15％粉锈宁60～100克,水0.5～1公斤。1.3 小麦种子50公斤加甲基托布津125克,水 Wheat smut is mainly scattered smut, fish head smut, the main source of infection for the contaminated seeds, soil and manure, belonging to the seedling stage infection, only 1 infection. Prevent the occurrence of sowing before planting. A wheat seed dressing method 1.1 wheat seeds 50 kg plus 6% Rickettsu or 12.5% ​​of 20 to 25 grams of special spectrum of azole, water 0.5 to 1 kg. 1.2 wheat 50 kg plus 15% of the powder rust rather 60 to 100 grams of water 0.5 to 1 kg. 1.3 50 kg of wheat seeds plus thiophanate-methyl 125 g, water