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苗枯病是玉米苗期主要病害,重病田往往因病缺苗3~5成。20世纪50年代国外就有报道,我国于20世纪90年代开始在南方春玉米区大面积发生,此后玉米苗枯病在我国发生的面积逐年扩大。近年来,黑龙江省玉米种植面积不断扩大,该病发生面积也逐年扩大。为适应黑龙江垦区150亿kg粮目标的需
Seedling blight is the main disease at seedling stage of maize, severe disease often due to lack of seedlings 3-5%. In the 1950s, there were reports from abroad that China started to popularize in a large area in the spring maize area in the 1990s. Since then, the area of maize blight that has occurred in China has been expanding year by year. In recent years, the planting area of corn in Heilongjiang Province has been constantly expanding, and the area of the disease has also been expanding year by year. In order to meet the needs of Heilongjiang reclamation area of 15 billion kg grain target