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小麦白粉病是由专性寄生菌Blumeria grami-nis f.sp.tritici引起的一种重要的气传真菌病害,该病曾于1990-1991年两年在我国发生大流行,近年来其发生面积也一直维持在500万公顷以上,
Wheat powdery mildew is an important airborne fungal disease caused by the obligate parasitic fungus Blumeria grami-nis f.sp. tritici, which occurred in two years from 1990 to 1991 in our country. Its occurrence area It has also been maintained at more than 5 million hectares,