本报讯自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月中旬,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、内蒙古通辽、 From the beginning of July, the third generation of armyworms occurred successively in the northeast, north China and northern part of Huanghuai. At present, most areas have entered a peak. As of mid-August, 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, larvae are predominately above age 3, maize fields and millet fields are more common, weeds are more, and extensive management is carried out in the fields. Chaoyang, Liaoning Province, Tongliao, Inner Mongolia,