稻曲病[Ustilaginoidea uirus(Cke.)Tak]在我国南北稻区都有发生。本省自70年代后期以来为害加重,近年来北方部分稻区发病率逐年上升。本病不仅为害水稻,而且受此病污染的稻谷对人体、家畜、家禽均有一定的毒性。与防治方法有直接关系的侵染途径及初次侵染源目前国内尚缺深入研究。有关本病菌核的田间发生情况,丽水地 Ustilaginoidea uirus (Cke.) Tak] occurs in both rice fields in our country. The province has worsened its harm since the late 1970s, and the incidence of some northern parts of the country has been increasing year by year in recent years. The disease is not only harmful to rice, but also contaminated by the disease of rice on the human body, livestock, poultry have some toxicity. Infection pathways and primary sources of infection that are directly related to the methods of prevention and control are still in great demand in China. The incidence of the bacteria in the field of nuclear field, Lishui