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扬州发布水稻移栽期病虫防治意见

2023-07-04 10:27:36 来源: 江苏省扬州市农业农村局 阅读量:16957 评论

导读:苗期常见病虫主要有稻瘟病、螟虫、稻蓟马、灰飞虱等,对水稻壮秧全苗存在威胁,各地要加强病虫预测预警。

  【农机网 地方农机】当前江苏省扬州市水稻正处于移栽高峰期,苗期常见病虫主要有稻瘟病、螟虫、稻蓟马、灰飞虱等,对水稻壮秧全苗存在威胁,各地要加强病虫预测预警,适期开展防治,打好送嫁药,做到带药移栽,减轻水稻苗期病虫危害及大田期防治压力。
 
  一、当前水稻病虫发生趋势分析
 
  1、水稻苗叶瘟。苗叶瘟常年在丘陵山区的一些老病区都有发生,田间菌源充足。目前生产上还没有高抗稻瘟病的水稻品种,我市大面积种植的优质食味品种均不抗病。水稻机插秧育苗播种密度高,小气候条件有利于发病。
 
  2、稻蓟马、螟虫。稻蓟马、二化螟等害虫在丘陵山区常年均发生较重,是水稻苗期重点防治对象之一,大螟在部分地区有回升的势头。
 
  3、水稻细菌性条斑病。去年在扬州市除宝应以外的各县(市、区)均有不同程度的发生,发生疫情点多、发生范围广。今年在杂交籼稻种植区发生流行的风险仍较大。
 
  4、福寿螺。在扬州市除江都以外的各县(市、区)均有发现,在部分荷藕、茨菇等农田造成一定的危害。近期随着水稻移栽,稻田大量灌溉用水,福寿螺虫、卵极易随着水流进入稻田。
 
  5、水稻病毒病。水稻病毒病近几年虽然发生较轻,但仍要加强监测,做好预防,控制灰飞虱发生基数,减少传毒媒介。
 
  二、防治意见
 
  1、强化农业措施。加强水稻健身栽培,提高抗病能力。合理肥水运筹,控制氮肥用量,增施磷、钾肥,增强水稻抗逆力。尽可能降低田间湿度,割净水渠和池埂上的杂草,增加田间通风透光性,减少灰飞虱的桥梁寄主,清理病稻草,减少田间菌源。
 
  2、坚持科学防控。准确测报,科学用药,做到“决战前期,保护后期”,减轻水稻大田后期病虫防治压力。针对水稻苗叶瘟,立足预防,特别是老病区、感病品种加强主动用药预防,可使用三环唑、稻瘟灵、稻瘟酰胺等。针对稻蓟马、螟虫,根据田间虫量和虫龄适期用药,可选用乙基多杀菌素、氯虫苯甲酰胺等。针对水稻细菌性条斑病,在发生风险区,于秧苗3-4叶期、移栽前各喷药1次进行预防,或在台风暴雨前用药预防,可选用噻唑锌、噻霉酮、氯溴异氰尿酸等。针对福寿螺,在稻田进水口加装防虫滤网,阻止虫、卵进入稻田,如田间已有发生可用杀螺胺、四聚乙醛等药剂进行防治。针对水稻病毒病,全面实施“切断毒链,治虫控病”的综合防治策略。
 
  3、加强宣传指导。加强防治技术和防治要求的宣传,提高对苗期病虫防治重要性的认识,使水稻苗期病虫防治措施和方法做到家喻户晓,并使广大农民充分认识到做好苗期防控能起到事半功倍的效果。在防治的关键时候要组织广大农技人员深入田间地头,指导农民开展科学防治。确保防治技术不走样,减轻大田期病虫发生基数和防治压力。
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