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2024年小麦重大病虫害防控技术方案

2024-04-12 08:34:14 来源:山西省植物保护植物检疫中心 阅读量:21286 评论

导读:山西省植保中心组织有关专家分析研判,预计2024年小麦病虫总体偏重发生,其中蚜虫在运城、临汾麦田偏重发生。

  【农机网 热点关注】 山西省植保中心组织有关专家分析研判,预计2024年小麦病虫总体偏重发生,其中蚜虫在运城、临汾麦田偏重发生,麦蜘蛛在南部旱垣麦田偏重发生,白粉病在运城、临汾部分旱地麦田及水浇地群体密度大的麦田偏重发生;茎基腐病在运城、临汾部分湿度大的麦田偏重发生,并呈逐年加重趋势;赤霉病中等流行,抽穗扬花期遇雨有偏重发生的可能;条锈病在运城、临汾部分麦田有中等流行风险。为有效控制病虫危害,确保小麦稳产增收,特制定本方案。
 
  一、防控目标
 
  全省实现防治处置率95%以上,绿色防控覆盖率58%以上,综合防治效果85%以上,危害损失率控制在5%以内;优质小麦生产基地、绿色防控示范基地、省部级绿色高产高效示范片实现统防统治全覆盖。
 
  二、防控策略
 
  坚持因地制宜、分区施策、分类指导的原则,抓住重大病虫、重点地区、关键时期,开展综合防治和统防统治,强化绿色防控、科学用药、减量用药,提高防控效果,实现小麦病虫防控目标,保障小麦生产和质量安全。
 
  三、重点防控对象
 
  重点防控小麦赤霉病、条锈病、蚜虫等一类病虫害,以及茎基腐病、纹枯病等茎基部病害,兼顾白粉病、麦蜘蛛、全蚀病、吸浆虫等。
 
  四、防控措施
 
  在准确监测的基础上,根据小麦不同生育阶段主攻对象,分类施策,综合防治。
 
  (一)返青拔节期
 
  以防治白粉病、麦蜘蛛为重点,兼治纹枯病、茎基腐病、麦蚜。在白粉病发病初期,当病叶率达到10%时喷药防治。常用药剂有环丙唑醇、腈菌唑、丙环唑、氟环唑等。严重发生田,应隔7~10天再喷1次。要用足药液量,均匀喷透,提高防治效果。当纹枯病病株率达10%时,可选用噻呋酰胺、戊唑醇、丙环唑、烯唑醇、井冈霉素、多抗霉素等进行防治。对小麦茎基腐病,选用丙硫菌唑、叶菌唑、氰烯菌酯、戊唑醇、苯醚甲环唑等药剂防治。对纹枯病、茎基腐病等茎基部病害的防治,要注意加大水量,将药液喷淋在麦株茎基部,以确保防治效果。
 
  对麦蜘蛛,当平均33厘米行长螨量达200头时,选用阿维菌素、联苯菊酯、联苯·三唑磷等药剂喷雾防治,同时可通过中耕除草、合理肥水等农业措施,降低田间虫量。对蚜虫,当蚜量达到百株200头时,应选用啶虫脒、噻虫胺、高效氯氰菊酯、抗蚜威等药剂及时开展防治。
 
  如果多种病虫同时发生,可分别选择对路农药混配防治,提高防治效率;在病虫防控的同时,可结合当地苗情,适当添加生长调节剂或免疫诱抗剂如芸苔素内酯、赤·吲乙·芸苔、噻苯隆、氨基寡糖素、二氢卟吩铁、免疫激活蛋白等,提高抗病虫和抵御倒春寒等能力,提高病虫防控效果。
 
  (二)抽穗扬花期
 
  重点防治赤霉病、锈病、白粉病、吸浆虫等。对赤霉病,突出预防为主,晋南部常发区坚持“见花打药”,其他偶发区坚持“看天施药”,遏制病害流行,一旦抽穗扬花期遇阴雨等天气立即喷药预防;药剂品种可选用氰烯菌酯、丙硫菌唑、氟唑菌酰羟胺、戊唑醇、丙唑·戊唑醇、氰烯·戊唑醇、叶菌唑、枯草芽孢杆菌等,要用足药液量,施药后3~6小时内遇雨,雨后应及时补治;如抽穗扬花期遇连续阴雨天气,需隔5~7天再轮换用药防治1~2次,确保防治效果。苯丙咪唑类药剂抗性水平高的地区,应停止使用多菌灵、甲基硫菌灵等药剂,提倡轮换用药和组合用药。对条锈病,要加强病情监测,坚持“发现一点,防治一片”,及时控制发病中心;当田间平均病叶率达到0.5%~1%时,组织开展大面积应急防控,并且做到同类区域防治全覆盖。防治药剂可选用戊唑醇、氟环唑、丙环唑、嘧啶核苷类抗菌素、丙硫菌唑·戊唑醇等。
 
  对小麦吸浆虫,应重点做好抽穗期的成虫防治。在抽穗初期10复网20头以上成虫时,及时选用阿维·吡虫啉、高效氯氟氰菊酯、氯氟·吡虫啉等农药进行防治,重发区间隔3天轮换用药,再防治1次。
 
  对小麦白粉病、叶锈病,可以结合防治赤霉病、条锈病进行兼治;当田间病叶率达10%时,选用环丙唑醇、腈菌唑、丙环唑、氟环唑等杀菌剂进行防治,严重发生田,应隔7~10天再喷1次。
 
  (三)灌浆期
 
  重点防控麦穗蚜,提倡综合用药,达到一喷多效。当田间百穗蚜量达800头以上,益害比(天敌:蚜虫)低于1:150时,可选用啶虫脒、抗蚜威、吡蚜酮、高效氯氟氰菊酯、苦参碱、耳霉菌等药剂喷雾防治。有条件的地区,提倡释放蚜茧蜂等天敌昆虫进行生物防治。对白粉病和叶锈病等可结合小麦“一喷三防”,实施杀虫剂、杀菌剂、植物生长调节剂科学混用,综合控制病虫,助力单产提升行动。
 
  五、主推技术
 
  重点防控小麦赤霉病、条锈病、蚜虫等一类病虫害,以及茎基腐病、纹枯病等茎基部病害,兼顾白粉病、麦蜘蛛、全蚀病、吸浆虫等。
 
  (一)绿色防控技术
 
  重点推广抗病品种和适期晚播、深翻、生态调控、保护及利用天敌、免疫诱抗、生物农药等技术,提高药剂拌种或者种子包衣比例。对于赤霉病、条锈病、蚜虫等重大病虫,要加强监测预警,及早发现、及时处置;对重点区域,应加强病情普查,必要时组织开展专业化应急防控,防止病虫大面积暴发危害。
 
  (二)穗期“一喷三防”技术
 
  小麦抽穗至灌浆期是白粉病、赤霉病、条锈病、叶锈病、麦蚜、吸浆虫等多种病虫同时发生危害的关键期,可选用高效对路的杀菌剂、杀虫剂、叶面肥、免疫激活蛋白、调节剂和农药助剂等科学混用,综合施药,提高作物的免疫力,防病虫防早衰防干热风,达到一喷多效、农药减量和单产提升的效果。
 
  (三)科学用药技术
 
  做到抓住关键时期、选用对路药剂、用足药量水量、科学混配、轮换用药,注意保护蜜蜂等非靶标生物;推广使用自走式喷杆喷雾机、植保无人飞机等高效施药机械喷雾防治,使用植保无人飞机施药时,应添加相应的沉降、抗蒸发等功能的助剂,每亩用水量不低于1.5升,确保防治效果。
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