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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。蝗虫预计2003年东亚飞蝗夏蝗发生面积1500万亩,达到防治指标面积1200万亩,接近近几年发生水平。其中冀、鲁、豫的渤海湾蝗区、黄河滩蝗区及部分湖库蝗区发生5级,津、陕、辽、晋、
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. Locusts are expected in 2003 Locust locust locust area of 1500 mu, reaching control indicators area of 1200 mu, close to the level of occurrence in recent years. Among them, Hebei, Lu, Yu, Bohai Bay locust area, Yellow River Beach locust area and part of the lake locust area occurred 5, Tianjin, Shaanxi, Liao, Jin,