一、我国小麦病害的流行特点我国广大麦区经常是几种病害同时发生,东北麦区主要流行的为秆锈病和叶锈病,局部地区发生赤霉病和白粉病;我国西北、华北、黄淮、江淮麦区主要危害的为条锈病和白粉病。尤其近年白粉病上升很快,成为对小麦生产影响最大的病害。随着我国农业生产的发展,施肥水平逐年提高,改变了小麦生长的生态条件,白粉病逐年趋向严重。七十 First, the prevalence of wheat disease in our country Most of the wheat area is often the occurrence of several diseases at the same time, the main prevalence of the northeast wheat area for the stem rust and leaf rust, scab and powdery mildew in some areas; Northwest China, North China, Huanghuai The main hazards of Jianghuai wheat area are stripe rust and powdery mildew. In particular, powdery mildew rose rapidly in recent years and became the most affected disease in wheat production. With the development of agricultural production in our country, the fertilization level has been increased year by year, changing the ecological conditions of wheat growth. Powdery mildew tended to be serious year by year. seventy