根据全国农技中心会同有关专家分析预测,2017年全国玉米病虫害呈偏重发生态势,东北、华北地区玉米螟、地下害虫、大斑病为害较重,黄淮海地区以玉米螟、棉铃虫、二点委夜蛾、褐斑病发生突出,西北和西南地区以蚜虫、叶螨、小斑病发生普遍,预计发生面积11亿亩次。为做好玉米重大病虫害防控工作,特制订本方案。一、防控目标玉米重大病虫害防治处置率90%以上,病虫害总体防治效果80%以上,危害损失率控制在5%以下, According to the analysis and forecast of relevant experts by the National Agricultural Technology Center, the national corn pests and diseases will have a strong tendency to occur in 2017, while the corn borers, underground pests and large spot diseases in the northeast and north China will be seriously harmed. The corn borer, cotton bollworm, The phyllotaxis, brown spot disease prominence, northwestern and southwestern areas with aphids, spider mite, spot blotch common occurrence is expected to occur an area of ​​110000000 mus times. To make a major corn pest prevention and control work, special formula. First, the prevention and control targets Corn major pests and diseases control and disposal rate of 90% or more, the overall pest control effect of more than 80%, the damage control rate of less than 5%