大豆根部病害发生普遍，普通年份造成产量损失１０％，严重情况下可达３０％以上甚至绝产，尤其是大豆重迎茬种植，更为严重。大豆食心虫为害也很大，普通年份虫食率在３０％～４０％，严重情况下可达７０％以上。为了系统研究大豆病虫害防治技术，国家科技部将之列为国家... The occurrence of soybean root disease is common, resulting in 10% loss of production in ordinary years, up to 30% or even absolute production in severe cases, especially heavy-crop planting of soybean, which is even more serious. Soybean borer damage is also great, pest feeding rate in ordinary years 30% to 40%, in severe cases up to 70%. In order to systematically study soybean pest control technology, the Ministry of Science and Technology will be listed as the country ...