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中国玉米虫害下半年年预计依然偏重发生
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中国玉米虫害下半年年预计依然偏重发生
摘要:据中国农业推广服务中心7月末消息,虽然下半年全国趋势看,预计全国玉米虫害发生5.6亿亩次,去年同比下降3%。但依然预计今年玉米中后期虫害总体偏重发生,略重于常年,接近上年。其中,草地贪夜蛾、三代粘虫、二代草地螟、棉铃虫等迁飞性害虫对玉米生产威胁大,玉米螟也有普遍发生趋势。这些虫害将会危害盛期北方玉米种植区大部在7月下旬至8月底,南方玉米种植区可持续到10月底。8月,河北省玉米虫害正进入旺盛时期。山东省邹城市预计其玉米中后期病虫害中等偏重发生。广东地区预计下半年玉米病虫害也将会偏重发生。发生...
Insecticides China News (Chinese version) 202008
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