受晚稻品种布局、育秧方式、病虫源基数和气候条件等因素的影响,预计2000年广西中、晚稻主要病虫发生总的趋势为中等偏重局部大发生,除稻瘟病的发生接近上年(偏重年),稻细菌性条斑病、稻恶苗病的发生比上年偏重外,其它病虫的发生分布区域及为害特点与近年相比不会有大的变化。1 Affected by the factors such as the variety of late rice varieties, the methods of raising seedlings, the base number of pests and diseases and climatic conditions, it is estimated that the general trend of major pests and diseases of middle and late rice in Guangxi in 2000 will be partial and moderately large, except that the occurrence of blast is close to that of the previous year Year-on-year), the incidence of rice bacterial leaf streak disease and rice stump disease was higher than that in the previous year, and the distribution of other pests and diseases and their peculiarities would not change much in recent years. 1