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洪涝灾后农作物病虫害防治技术指导意见来了!

2023-08-04 09:07:46 来源:全国农技推广中心 阅读量:15652 评论

导读:为做好台风洪涝灾后农作物病虫害防控工作,减轻灾害损失,全国农技推广中心制定了《台风洪涝灾害后主要农作物病虫害防治技术指导意见》。

  【农机网 热点关注】近期以来,受台风“杜苏芮”等的影响,东南沿海等地遭受暴雨、大暴雨侵袭,江淮、黄淮东部和京津冀等地出现强降雨天气,部分地区田间积水较多、涝渍严重,导致水稻、玉米、花生、大豆、蔬菜等农作物长势弱、伤口多、抗性差,非常有利于各种病虫害的发生。为做好台风洪涝灾后农作物病虫害防控工作,减轻灾害损失,全国农技推广中心制定了《台风洪涝灾害后主要农作物病虫害防治技术指导意见》。
 
  防治要点
 
  水稻病虫害。暴雨和台风影响后,田间水层高、湿度大,植株伤口多,极有利于病害侵染流行。灾后要抢晴抓早,立即喷施噻唑锌或噻霉酮等药剂,预防细菌性条斑病、白叶枯病、细菌性基腐病等细菌性病害发生。当田间出现叶瘟急性病斑或发病中心以及纹枯病病株时,可选用三环唑、春雷霉素、枯草芽孢杆菌、申嗪霉素、多抗霉素,以及井冈霉素A、井冈•蜡芽菌、咪铜•氟环唑、多抗霉素等药剂进行防治。
 
  受台风影响,稻飞虱、稻纵卷叶螟可随降雨大量迁入,导致田间虫量突增。稻飞虱在稻株下部刺吸植株,为害隐蔽,防治不及时易引起“冒穿”倒伏严重减产。当稻飞虱田间虫量达到1000头/百丛的防治指标时,要抢晴喷施杀虫剂防治,药剂可选用金龟子绿僵菌CQMa421、球孢白僵菌、醚菊酯、吡蚜酮、烯啶虫胺、呋虫胺、三氟苯嘧啶等品种。要密切关注稻纵卷叶螟田间蛾量和幼虫量,处于分蘖期的稻田可适当放宽防治指标,利用植株补偿能力和自然天敌控害作用;单季稻孕穗至抽穗期,当卷叶或束叶尖达到60个/百丛的防治指标时,可选用甘蓝夜蛾核型多角体病毒、金龟子绿僵菌CQMa421等微生物制剂或氯虫苯甲酰胺、茚虫威、四氯虫酰胺等化学药剂进行防治。
 
  玉米病虫害。大雨、泥沙、渍涝等易造成玉米植株受伤,抗性变弱。要在排涝除湿、中耕松土,喷施氨基寡糖素、芸薹素内酯等免疫诱抗或生长调节剂,增强作物抗性的基础上,针对玉米基腐病、叶斑病、枯萎病等细菌性病害可能重发的情况,及时喷施嘧啶核苷类抗菌素、井冈霉素等药剂进行防治。
 
  针对瘤黑粉病、褐斑病、小斑病、纹枯病、南方锈病等真菌病害,可选用多菌灵、吡唑醚菌酯、戊唑醇等药剂进行防治。对于草地贪夜蛾、棉铃虫等迁飞性害虫,可选用氯虫苯甲酰胺、甲维盐等推荐用药进行防治。
 
  花生病虫害。雨后骤晴,田间高温高湿易导致花生叶斑病、果腐病、白绢病,以及棉铃虫、斜纹夜蛾、甜菜夜蛾等食叶害虫的发生,要立即组织开展防治。对于花生叶部病害可选用联苯三唑醇、氟环唑、烯唑醇、三唑酮等杀菌剂进行叶面喷雾防治;花生果腐病可选用多菌灵、嘧菌酯、三唑酮、多抗霉素等喷雾防治;白绢病可选用氟酰胺、噻呋酰胺等杀菌剂兑水喷淋植株茎基部;棉铃虫、斜纹夜蛾等食叶害虫,可用氯虫苯甲酰胺、甲维盐等叶面喷雾。病虫害发生严重时,在第一次施药7—10天后再喷施1次。
 
  大豆病虫害。洪水过后,田间湿度大,易滋生病虫害。黄淮地区要重点防治大豆根腐病、锈病、霜霉病、灰斑病和蚜虫、豆荚螟、食心虫等病虫害。可选用精甲霜灵•咯菌腈、吡唑•氟环唑、苯甲•丙环唑、嘧菌酯、多菌灵等杀菌剂,吡虫啉等杀虫剂,进行喷雾防治。此外,灾后大豆长势弱、持续高温等易引起大豆症青,可叶面喷施硼肥和氨基酸、氨基寡糖、香菇多糖等营养物质或免疫诱抗剂,增强植物自身抗逆能力。同时,选用噻虫胺、呋虫胺等防治点蜂缘蝽、飞虱、蓟马等介质害虫。
 
  蔬菜病害。水灾导致蔬菜植株受损、抵抗力弱,加之田间高温高湿,极有利于瓜类、茄果类、十字花科、豆科蔬菜等多种病害发生。要在及时疏通排水、中耕松土的基础上,对长势差、植株抵抗力弱的田块,及时喷施氨基寡糖素、赤•吲乙•芸苔等免疫诱抗剂增强植株抗病性。要坚持预防为主的原则,雨后及时喷施代森锰锌、百菌清、代森锌等保护性杀菌剂预防病害的发生。
 
  针对渍水后疫病、茎基腐病、青枯病、根腐病等土传病害高发态势,及时采用枯草芽孢杆菌、多粘类芽孢杆菌、蜡质芽孢杆菌、木霉菌、噁霉灵、多菌灵、福美双等药剂进行灌根或泼浇处理。针对叶果等部位病害,在霜霉病、疫病、炭疽病等真菌性病害发生初期,喷施寡雄腐霉、多抗霉素、烯酰吗啉、氟吡菌胺•烯酰吗啉、霜霉威、吡唑醚菌酯、苯醚甲环唑、醚菌酯、嘧菌酯等药剂进行防治;针对软腐病、细菌性角斑病等细菌性病害可喷施中生菌素、噻霉酮、噻唑锌、氢氧化铜、琥胶肥酸铜、喹啉酮等药剂防治。用药时要注意交替用药和用药安全间隔期。
 
  注意事项
 
  注意科学用药。台风和洪涝后应急施药预防病虫害,农药品种宜选用高含量单剂,避免使用低含量复配剂,确保防治效果。多种杀菌剂、杀虫剂混用时,应注意不同品种药剂的混用要求,避免相互作用影响药效。
 
  选择合适药械。灾后田间积水较多、土壤湿度较大地块不适宜人工和大型机械下田作业,可选用植保无人机等航空植保器械喷洒作业,亩喷液量不低于1.5升,并在药液中添加植物油类、有机硅类和聚合物类的沉降剂、抗蒸发剂等适宜飞防的助剂。较干燥的田块大面积作业可选用地面自走式喷杆喷雾机,亩喷液量一般控制在10~15升,小面积作业可采用人工背负式喷雾器,亩喷液量一般控制在15升左右。
 
  预防中毒事故。雨后高温高湿天气田间施药容易发生中暑和中毒事故,施药作业时间尽量避开中午高温时段,选择在上午9点前或下午16点后进行,遇风力大于3级以上或下雨天气,应停止施药。施药时要注意做好安全防护,穿戴好防护服、口罩、手套等防护用品。施药过程中不吃东西、不吸烟,避免发生中毒事故。施药后要及时洗手、洗澡、换衣,并将喷雾器械清洗干净。
 
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