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稻曲病又称青粉病,其病原菌属于子囊菌亚门的绿核菌属。近几年来稻曲病发生普遍,已成为水稻生产上急需解决的问题。多在晚稻上发生,即使是收成好的年份往往也发生较重。据1999年对田间自然发病程度调查,水稻发生稻曲病后,一是使结实率下降,宇秕率提高,较未发病的对照,秕粒率提高15.2个百分点,千粒重下降1.3克,每667平方米产量下降10.8％。二是整米率降低,碎米率提高,由于“稻
False false smut, also known as powdery mildew, the pathogen belongs to Ascomycetes sub-Menonuclear green. In recent years, the widespread occurrence of STD has become an urgent problem to be solved in rice production. Occurred in late rice, even the good years of harvest tend to occur heavier. According to a survey of the degree of natural occurrence in the field in 1999, after rice false smut occurred, the rate of seed setting decreased and the rate of hibernation increased. Compared with the non-infected controls, the rate of nodules increased 15.2 percentage points and the grain weight decreased 1.3 g per 667 The output of square meters decreased by 10.8%. Second, reduce the whole rice rate, broken rice rate increase, due to "rice