小麦根腐病(Helminthosporium Sativum)是我省小麦生产上的重要病害,自有抗锈病品种推广以来,锈病危害显著下降,而小麦根腐病的危害则越来越严重。我省小麦成株期的叶枯约有80％是由根腐病引起的,常造成植株早枯,致使千粒重下降,一般可减产15-20％,严重时可达30％以上。我们从1978年开始探索小麦根腐病的药剂防治方法,先后鉴定了农用抗菌素2千余个菌株,国 Wheat root rot (Helminthosporium Sativum) is an important disease in the wheat production in our province. Since the introduction of self-anti-rust varieties, the damage of the rust decreased significantly while the damage of the wheat root rot became more and more serious. Approximately 80% of the leaf blight of wheat in mature period in our province is caused by root rot, which often leads to early dryness of plants, resulting in a decrease of 1000-grain weight. Generally, the yield can be reduced by 15-20% and in severe cases up to 30%. We started in 1978 to explore the method of control of wheat root rot, has identified more than 2,000 agricultural antibiotics strains, the country