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小麦白粉病,在我省近几年有所发展蔓延,特别是随着肥水条件的提高,高产田块的增加,其发生发展尤为严重,直接威胁着小麦的生产,受害的麦田,一般减产5—10%,严重的达20—40%。为此,现将白粉病的发生与防治作以简介。小麦白粉病,是由真菌子囊菌纲的禾谷白粉病,侵害小麦的变种引起的,一般不危害大麦,它是一种专性寄生菌(即纯寄生菌),只能在活的植株上生长发育,在小麦整个生长期间,叶片、叶鞘、穗颖和芒等都受侵害,而以叶片受害最重,受害处表面复盖有长圆形的白粉状霉堆(菌丝)严重时连
Wheat powdery mildew has been spreading in recent years in our province. Especially with the increase of fertilizer and water conditions and the increase of high-yield plots, the occurrence and development of wheat powdery mildew are particularly serious, which directly threaten the wheat production and the harvested wheat fields. -10%, severe up to 20-40%. To this end, the occurrence and prevention of powdery mildew is now described. Wheat powdery mildew is caused by the cereal powdery mildew of the fungus Ascomycetes which infects the wheat varieties and generally does not harm the barley. It is an obligate parasitic (ie, purely parasitic) plant that can only be found on live plants Growth and development, throughout the growth of wheat, leaves, leaf sheaths, spike Ying and Mount are affected, and to suffer the most leaf damage, affected by the surface covered with oval powdery mildew (mycelium) serious even