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全国农业技术推广服务中心8月13日称,自7月末始,三代粘虫在东北、华北和黄淮北部陆续发生,目前大部地区已进入发生盛期。截至8月11日,黑龙江、吉林、辽宁、内蒙古、河北、北京、天津、山西、山东和河南等10个省(区、市)发生,发生面积为1766万亩。目前幼虫以3龄以上高龄为主,玉米田和谷子田发生较为普遍,杂草多、管理粗放田块发生重,其中辽宁朝阳、
National Agricultural Technology Extension Service Center said on August 13 that since the end of July, the third generation of armyworms occurred one after another in the northeast, north China and northern part of Huanghuai. At present, most areas have entered a peak. As of August 11, 17,660,000 mu occurred in 10 provinces (autonomous regions and municipalities) such as Heilongjiang, Jilin, Liaoning, Inner Mongolia, Hebei, Beijing, Tianjin, Shanxi, Shandong and Henan. At present, the larvae are predominately above age 3, and maize fields and millet fields are more common, with more weeds and heavy management fields. Among them, Liaoning Chaoyang,