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近年来我国北方玉米产区出现一种新病害玉米疯顶病,其病原菌为霜霉科、指疫霉属、大孢指疫霉Sclerophthora macrospora (Sacc.)Thirum et al.,是玉米霜霉病的一种。河北省未发生过疯顶病的地区突然发生,而且严重地块发病率达80％以上,一般发病率为3％～60％,发病地块逐年增多,有由北向南扩展的趋势。发病植株多数因出现雌、雄穗增生畸形而败育,颗粒无收损失严重。为有效控制该病的扩展蔓延,自1992年起开展了玉
In recent years, a new type of maize insomnia appeared in the maize producing area in the north of our country. The pathogens were aspergilli, Phytophthora, Sclerophthora macrospora (Sacc.) Thirum et al. A kind of Hebei Province has not occurred in a sudden onset of the sudden onset of the area, and severe block incidence rate of 80% or more, the general incidence of 3% to 60%, the incidence of land increased year by year, from north to south trend. The majority of diseased plants due to appear female, tassel hyperplasia deformity and abortion, the loss of the crop loss serious. In order to effectively control the spread of the disease spread, jade has been carried out since 1992