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近年来,水稻恶苗病的发生与危害损失呈几何级数上升的趋势,成为各级干部、科技人员和广大农户十分关注而急需解决的问题。对此,我站作了专题调查,共调查137户、159块田、213亩水稻,通过对品种、种子、药剂处理,育秧方式,肥水管理等方面与恶苗病发生的关系进行分析,以探求水稻恶苗病的发病规律,找出其致病因素及诱发因子,为综合防治决策提供科学依据。1 发病规律与特点 根据调查和积累的资料,水稻恶苗病属于真菌性病害,其菌丝体及分生孢子不易存活于水中,其菌
In recent years, the incidence and harm loss of rice Bakanae disease have been increasing geometrically, becoming a problem which is urgently needed to be resolved by cadres, scientists and technicians at all levels and the majority of farmers. In this regard, I made a special survey of stations, investigated a total of 137 households, 159 fields, 213 acres of rice, through the varieties, seeds, drug treatment, seedling cultivation, fertilizer and water management and other aspects of the relationship with the occurrence of diarrhea to Explore the pathogenesis of rice Bakanae disease, find out its pathogenic factors and inducers, to provide a scientific basis for comprehensive prevention and control decisions. 1 pathogenesis and characteristics According to the survey and the accumulated data, rice Bakanae disease belongs to fungal diseases, its mycelium and conidia are not likely to survive in water, the bacteria