据各棉区区域测报站监测,今年第三代棉铃虫总残虫量,黄河流域大部棉区比去年偏高,长江流域棉区普遍低于去年;晚发迟衰棉田面积比率,黄河流域大部棉区高于常年值,长江流域棉区比常年偏低;8月份气象条件对长江流域大部 According to the monitoring stations in each cotton area, the third generation of cotton bollworm in this year, the total amount of residues, most of the Yellow River cotton area higher than last year, the Yangtze River cotton area generally lower than last year; delayed hair late cotton area ratio, the Yellow River Basin Most of the cotton area is higher than the perennial value, and the cotton area in the Yangtze River valley is lower than that of the normal year; the meteorological conditions in August are mostly for the Yangtze River Basin