农业部日前发布今年全国农作物病虫害发生的趋势 ,其特点是全国大部分地区重大虫害爆发强度大 ,病害发生相对较轻。据分析 ,今年发生较严重的病虫害有蝗虫、棉铃虫、水稻螟虫、小麦蚜虫、玉米螟 ,预计病虫害发生面积较大、波及较广 ,与上年基本持平。据国家气候中心预测 ,今春 The Ministry of Agriculture recently released this year the trend of crop diseases and insect pests in the country, which is characterized by the great intensity of major pest outbreaks in most parts of the country and the relatively mild occurrence of diseases. According to the analysis, the more serious pests occurred this year are locusts, cotton bollworms, rice stem borers, wheat aphids and corn borers. Pest and disease occurrences are expected to be larger and more widespread, maintaining the same level with the previous year. According to the National Climate Center forecast this spring