The results showed that early sowing,big sowing density and high nitrogenous fertilizer were the primary reasons on aggravating the degree of banded sclerotial blight morbidity.

• 结果表明:播期早、播种密度大和氮肥用量高是纹枯病发生程度加重的主要原因。冬前和播种-拔节期积温多,拔节前后气温低,纹枯病病情指数高。