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主要病虫及危害河南省玉米年种植面积约为3000万亩,占秋粮总面积的35%左右;年总产量约75亿公斤,占秋粮总产量的40%以上。近年来,随着玉米栽培条件及品种等诸方面的变化,再加上对玉米病虫害的防治重视不够,使河南省玉米病虫害的发生危害逐年加重。常年发生面积都在1000万亩上下,其中10%受害较为严重。每年损失玉米5～10亿公斤左右。当前发生面积最大、危害较严重的是玉米青枯病。1981年全省发病面积在
The main pests and diseases of corn in Henan Province planted area of about 30 million mu, accounting for about 35% of the total area of autumn grain; annual total output of about 7.5 billion kg, accounting for more than 40% of the total autumn grain output. In recent years, with the maize cultivation conditions and varieties and other aspects of change, coupled with inadequate attention to prevention and control of corn pests and diseases, so that the occurrence of corn pests and diseases in Henan Province increased year by year. Perennial occurred in an area of 1000 mu, up and down, of which 10% of the more serious victims. Annual losses of 5 to 1 billion kilograms of corn. Currently the largest area of occurrence, the more serious damage is corn bacterial wilt. In 1981 the province incidence area in