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(一)稻瘟病是我省水稻产区的主要流行性病害之一,每年均有发生。解放以来我省稻瘟病曾出现过l 2次大流行,在50~70年代,该病发生为害一般较轻,80年代起发生流行频率增加,
(A) Rice blast is one of the major epidemic diseases in rice producing areas in our province, occurring annually. Since the liberation of rice blast in our province there have been 12 major pandemics in the 1950s and 1970s, the disease was generally less harmful and the epidemic frequency increased in the 1980s.