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稻曲病是水稻常发性病害之一。该病过去在崇明县发生较轻，对产量影响不大。近年来，却呈逐年上升的趋势。据崇明县植保站１９９８年调查结果，全县平均病穗率为４．００％，病粒率为０．５８％。１发生特点１．１发病面积广据县植保站在１９９８年１０月１５日对２０９块田５?
False smut is one of the most common diseases in rice. The disease occurred in Chongming County in the past less affected little on the yield. In recent years, it has been showing an upward trend year by year. According to Chongming County Plant Protection Station survey results in 1998, the county average disease ear disease rate was 4.00%, the disease rate was 0.58%. 1 Occurrence 1.1 The incidence of disease Guangxian County Plant Protection Station on October 15, 1998 on 209 fields 5?