2024年7月18日 星期一 19:43:55

木薯细菌性枯萎病在广西平南严重发生

      细菌性枯萎病是当前我国木薯生产中为害最严重的病害,重病田产量损失通常在0.3吨/亩以上,每年均造成严重的产量损失。
      木薯是广西自治区平南县主要的经济作物之一,种植面积约17万亩。今年5月份以来,该病在当地镇隆镇、上渡镇等地部分木薯园严重发生。国家木薯产业技术体系病害防控岗调查发现,镇隆镇一个面积200余亩的木薯园去年种植新选048时已有细菌性枯萎病发生。今年上渡镇两个总面积约100亩的木薯园从发病田引进带病种质,造成该病在3个木薯园普遍发生。6月份调查发现,木薯苗期(株高40至60cm)时田间发病率在60%左右。8月14号调查发现,由于植株封行,田间湿度大,而近期雨水较多,造成病害逐渐加重,田间发病率在95%以上。
      针对以上情况,病害防控岗专家建议相关农户用乙蒜素等有效药剂进行病害防治,加强田间管理,今年收获后进行田间清理,下一季节种植无病种茎或选用有较好耐病性的华南5号木薯品种。
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