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省农业厅要求尽快防控玉米三代黏虫
2017-08-10 08:34:41 中国青年网
本报讯(记者 吴莎莎)8月9日,记者从省农业厅了解到,继去年玉米三代黏虫在关中东部秦岭北麓局地暴发,危害严重后,今年再次来袭。省农业厅要求,重点区域要尽快防控玉米三代黏虫,以减少危害。
据了解,黏虫是一种爆发性、迁飞性害虫,危害以幼虫暴食为主。受近期强对流天气偏多影响,目前三代黏虫已在渭南、延安、榆林等市的部分县区局部田块发生危害,主要发生区域集中在白水、澄城、洛川、宜川、富县、黄陵、定边、靖边等县(区)的玉米田及果园。高密度田块最大虫量合阳玉米田500头/百株,洛川果园92头/平方米,定边玉米田1171头/百株,靖边玉米田592头/百株。
省植物保护工作站提醒广大农民群众,黏虫幼虫虫龄越大,抗药性越强,要及早防治,争取把黏虫消灭在低龄期。我省三代黏虫3龄幼虫常年发生盛期主要集中在8月上中旬,防治适期应掌握在3龄前。
针对当前虫情,应主要采取以下措施:一是捕杀幼虫。虫龄偏大田块,可进行击落捕杀,防止黏虫进一步迁移危害。二是开展统防统治。在黏虫偏重发生区,玉米田采取高效航化植保器械,开展统一防治,快速控制虫情;果园采取地面植保器械,及时对杂草、果树喷雾,防止啃食果叶。三是开展群防群治。
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