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玉米重大病虫害发生动态和下阶段趋势
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玉米重大病虫害发生动态和下阶段趋势
受前期台风"烟花"影响,玉米南方锈病已传入沿淮淮北夏玉米主产区,当前病情是近5年最重的一年。江苏东台7月初调查病田率3%,平均病株率1%—4%,病叶率0.8%;安徽淮北7月下旬见病,始见期比重发的上年提早1周,近期扩散速度快,平均病株率2%,平均病叶率1%。据国家气象中心预测,8月中下旬长江中下游、江淮、黄淮、华北、东北大部降水偏多,江淮、华北大部、东北中南部等地偏多2成以上,适宜害虫迁飞危害和病害扩散流行;8月下旬可能有1—2个台风生成并北上,对草地贪夜蛾、粘虫、南方锈...
Fungicides China News (Chinese version) 202108
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