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受积温偏高和寄主生育期提前的综合影响,今年早春小麦病虫害发生期偏早、发生程度重于常年。截至3月6日,全国小麦病虫害发生面积高达7680万亩,比去年同期增加57.3%。其中小麦蚜虫全国发生面积1529万亩,比去年同期增加122.4%;麦蜘蛛全国发生面积2253万亩,比去年同期增加68.5%;小麦纹枯病全国发生面积3566万亩,比去年同期增加40.2%;小麦白粉病全国发生面积197万亩,比去
Affected by the combined effect of high accumulated temperature and the early growth period of the host, the incidence of wheat pests and diseases was earlier in this year than in perennial. As of March 6, the area of wheat diseases and insect pests reached as high as 76.8 million mu, an increase of 57.3% over the same period of last year. Among them, the area of wheat aphid occurred in China reached 15.29 million mu, an increase of 122.4% over the same period of last year; the area of wheat spider occurred in China was 22.53 million mu, an increase of 68.5% over the same period of last year; the area witnessed by wheat sheath blight was 35.66 million mu, an increase of 40.2% ; Wheat powdery mildew occurred across the country an area of 197 mu, more than go