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梨树县水稻稻瘟病发生及防治

Agricultural Development & Equipments(2013)

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Abstract
水稻俗称火烧瘟,是水稻重要病害之一。主要分为苗瘟、叶瘟、节瘟、穗颈瘟及谷粒瘟,以节瘟、穗颈瘟对水稻产量影响最大。苗瘟是指水稻苗期发病,由于梨树县水稻苗期气温偏低,不易发生苗瘟病。叶瘟一般在7月上、中旬发生。由于水稻多个部位发生稻瘟病,可以引起大幅度减产,一般年份减产10~20%,严重时减产40~50%,甚至颗粒无收。
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