水稻有哪些病害水稻三大主要病害是:稻瘟病、白叶枯病、纹枯病。其它重要病害有稻曲病、恶苗病、霜霉病等。病害流行暴发的根本原因是:优质感病品种比重增大,病菌生理小种增多,耕作栽培制度变化等向着有利于病害发生和危害的方向发展。什么是稻瘟病稻瘟病又名稻热病,俗称火烧瘟 What are the diseases of rice Three major diseases of rice are: rice blast, bacterial leaf blight, sheath blight. Other important diseases are false smut, diarrhea, downy mildew and so on. The root causes of disease outbreaks are: the proportion of quality susceptible varieties increased, the number of pathogenic bacteria increased, and the changes of cultivation and cultivation systems were oriented toward the occurrence of disease and the harm to the disease. What is rice blast Rice blast, also known as rice fever, commonly known as fire plague