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据全国农技中心组织科研、教学和推广单位专家分析预测,2017年全国玉米主要病虫害呈偏重发生态势,预计发生面积为11.0亿亩次。其中,虫害发生8.1亿亩次,病害发生2.9亿亩次。东北和华北地区以玉米螟、地下害虫、大斑病为害最重,黄淮海地区以棉铃虫、玉米螟、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,粘虫总体发生平稳,在东北和华北及黄淮局部有出现高密度集
According to the analysis and forecast of experts from scientific research, teaching and promotion units organized by the National Agricultural Technology Center, the major diseases and insect pests of corn in China are expected to take on a strong tendency in 2017 with an estimated area of 1.1 billion mu. Among them, pest occurred in 8.1 million mu times, disease occurred 2.9 million mu times. In Northeast China and North China, corn borers, underground pests and big leaf spot were most seriously damaged. In the areas of Huang-Huai-Hai, bollworm, corn borer, two-stage telophase and brown spot appeared prominently. In the northwestern and southwestern regions, aphids, spider mites, The occurrence of small spot disease is common, and armyworm generally occurs smoothly. In the northeast and north China and Huang-huai area, there appears a high density set