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70年代以来。玉米青枯病就已成为我国玉米主要病害,特别是近几年,一些主要玉米产区迅速蔓延,一般年份发病率54～15%,严重的达40～46%。对玉米产量影响很大。据田间调查,收获前15～20天发病的千粒重损失48.7%。收获前10天左右发病的干粒重损失23.3%。一、症状玉米青枯病主要发生在乳熟后期。收获前15～20天左右植株突然成片萎蔫死亡,由于植株呈青绿色故称“青枯病”。根系发病,从玉米抽穗开始特别在乳熟初期,地下根系先由毛根产
Since the 70s. Corn bacterial wilt has become the main disease of maize in China. Especially in recent years, some major maize producing areas have spread rapidly. The incidence of common maize diseases is 54-15% in most years and 40-46% in severe cases. Great impact on corn production. According to field surveys, the incidence of 1000 grain weight loss of 48.7% before harvest 15 to 20 days. The dry weight loss of about 10 days before harvest was 23.3%. First, the symptoms of corn bacterial wilt occurs mainly in the late milk. About 15 to 20 days before harvest, the plants suddenly become wilted and die. As the plants are greenish, they are called “bacterial wilt”. Root disease, starting from the beginning of corn heading, especially in the beginning of milky millet, underground roots first by the hair root production