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今年一代粘虫在长江中下游、江淮和黄淮麦区发生面积小,经有效防治或兼治后各地残虫量普遍较低。近期,黄淮、华北、东北、西南和西北地区陆续出现一代成虫,局部始见卵,大部分地区累计诱蛾量和卵量明显低于近年同期。结合天气条件和作物种植情况,全国农业技术推广服务中心预计今年二代粘虫总体为中等发生,在内蒙古、辽宁、河北、山东等局部降水丰沛、管理粗放的地方会出现高密度田块。预计全国发生面积约为3000万亩,幼虫发生为害盛期在6
This generation of armyworms in the middle and lower reaches of the Yangtze River, Jianghuai and Huanghuai wheat area occurred in small area, after effective prevention or treatment of the amount of around the world is generally low. Recently, a generation of adults gradually appeared in Huanghuai, North China, Northeast, Southwest and Northwest China. Eggs were partially seen in most areas. The accumulated amount of moths and eggs in most areas were significantly lower than those in recent years. Combined with the weather conditions and crop planting situation, the National Agricultural Technology Extension Service Center expects the second-generation armyworm to occur moderately this year. High-density plots will appear in parts of Inner Mongolia, Liaoning, Hebei and Shandong that have abundant rainfall and extensive management. It is estimated that an area of about 30 million mu will occur throughout the country, and the larvae will have a peak at 6