据全国农业技术推广服务中心预测分析,2003年全国农作物重大病虫害呈偏重发生态势。其中东亚飞蝗、草地螟、稻飞虱等迁飞性害虫和小麦条锈病等流行性病害发生将达4级(1级:轻发生,2级:偏轻发生,3级:中等发生,4级:偏重发生,5级:大发生),土蝗、甜菜夜蛾、斜纹夜蛾、烟粉虱等害虫发生范围将继续扩大。 According to the prediction and analysis of the National Center for Agricultural Technology Extension and Service, major pests and diseases of crops across the country took on a heavier momentum in 2003. Among them, epidemic diseases such as migratory pests such as Locusta migratoria, Meadow Stem Borer, Planthopper, and wheat stripe rust will reach 4 levels (level 1: light, level 2: partial light, level 3: moderate, 4 Level: emphasis occurs, level 5: large occurrence), Acrididae, beet armyworm, Spodoptera litura, whiteflies and other pests occurrence will continue to expand.