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随着农业生态条件的变化和小麦新品种的不断选育及推广种植,小麦叶枯类病害已成为河南省小麦的主要病害之一,并且发病面积逐年增加,危害程度逐年提高。70年代仅在河南省局部地区的个别品种上零星发生,80年代已遍及全省大部分麦区及三分之一的小麦品种,进入90年代病害发生更加严重,1990年河南省小麦叶枯类病害发生3465万亩以上,小麦减产5亿公斤。1996年小麦叶枯类病害又一次大发生,1997年小麦叶枯类病害还是严重发生,特别是豫中、豫南、豫东等地区发生甚为严重,
With the change of agro-ecological conditions and continuous breeding of new wheat varieties and popularization, wheat leaf blight disease has become one of the major diseases of wheat in Henan Province, and the incidence of the area increased year by year, the degree of harm increased year by year. In the 1970s, sporadic occurrence occurred only in some varieties of some areas in Henan Province. In the 1980s, most of the wheat areas and one third of the wheat varieties in the province were covered. In the 1990s, the disease occurred even more serious. In 1990, wheat leaf blight 34.65 million mu of diseases occurred, wheat 500 million kilograms reduction. Wheat leaf blight disease in 1996 once again occurred in 1997, wheat leaf blight disease is still serious, especially in Henan, Henan, eastern Henan and other places is very serious,