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2024年小麦春季重大病虫害防控技术方案

2024-03-11 11:54:55 来源:全国农业技术推广服务中心 阅读量:19770 评论

导读: 据全国农技中心预测分析,2024年春季小麦赤霉病、条锈病、白粉病、纹枯病、茎基腐病、蚜虫、叶螨、吸浆虫等病虫害总体偏重发生。

  【农机网 热点关注】 据全国农技中心预测分析,2024年春季小麦赤霉病、条锈病、白粉病、纹枯病、茎基腐病、蚜虫、叶螨、吸浆虫等病虫害总体偏重发生,尤其是开春以来,我国黄淮东南部、江淮、江汉、江南等地遭遇两次低温雨雪冰冻天气,麦田湿度大,随着气温回升,纹枯病、茎基腐病等土传病害发生有加快扩展蔓延的趋势。为有效控制病虫危害、助力小麦大面积单产提升,确保小麦丰产丰收,制定本方案。
 
  一、防控目标
 
  全国实现病虫害防治处置率 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、重点区域、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、农药减量,提高防控效果,实现小麦病虫防控目标,保障小麦生产安全和质量安全。
 
  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、叶锈病、吸浆虫等常发病虫。
 
  (一)华北麦区。以纹枯病、茎基腐病、白粉病和蚜虫防治为主,兼顾锈病、赤霉病、叶螨和吸浆虫等。
 
  (二)黄淮麦区。以条锈病、茎基腐病、赤霉病、纹枯病、蚜虫等病虫为重点,兼顾白粉病、叶锈病、根腐病、叶螨防控;黄淮南部应加强赤霉病预防。
 
  (三)长江中下游麦区。以赤霉病、纹枯病、蚜虫为主,兼顾白粉病、条锈病等病虫。
 
  (四)西北麦区。以条锈病、茎基腐病、蚜虫为主,兼顾赤霉病、白粉病、叶螨、吸浆虫等病虫;新疆麦区需关注雪霉叶枯病。
 
  (五)西南麦区。以条锈病、赤霉病、叶螨为主,兼顾白粉病、蚜虫等。
 
  四、防控措施
 
  (一)返青拔节期
 
  以防治条锈病、纹枯病、茎基腐病为重点,挑治蚜虫和叶螨。对条锈病,要加强病情监测,实施分区防控。西南、汉水流域和陕西关中、河南南部、甘肃陇南等主要冬繁区,要全面落实“带药侦查、打点保面”防治策略,及时封锁发病田块,减少菌源外传,降低和延缓向黄淮、长江中下游和华北麦区扩散蔓延。在越夏区,春季要加强转主寄主小檗周边自生麦苗及麦秸管理,控制条锈菌有性生殖,降低病菌毒性变异速率。黄淮春季流行区,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,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。对纹枯病,于小麦拔节初期,田间病株率达 10% 时主动施药防治,防治药剂可选用井冈·蜡芽菌、噻呋酰胺、戊唑醇、丙环唑、烯唑醇、井冈霉素、多抗霉素等。对茎基腐病,于小麦返青拔节期,选用丙硫菌唑、丙硫唑、叶菌唑、氰烯菌酯、戊唑醇、苯醚甲环唑、氯氟嘧菌唑等药剂防治。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。
 
  对叶螨,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,添加生长调节或免疫诱抗剂如芸苔素内酯、赤·吲乙·芸苔、氨基寡糖素、二氢卟吩铁、噻苯隆、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
 
  以预防赤霉病为主,兼顾锈病、白粉病、吸浆虫等。对赤霉病,长江中下游和黄淮南部等常年病害流行区,应抓住齐穗至扬花初期关键时期,主动预防,遏制病害流行,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、叶菌唑、氰烯·戊唑醇、枯草芽孢杆菌、井冈·蜡芽菌等,要用足药液量,施药后遇雨,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。对华北、西北赤霉病偶发区,应关注抽穗扬花期天气预报,因地制宜实施主动预防。
 
  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,可以结合防治条锈病、赤霉病进行兼治;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,严重发生田块,应间隔 7—10 天再轮换用药防治 1 次。
 
  (三)灌浆期
 
  重点防控麦穗蚜、白粉病和叶锈病,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、吡蚜酮、抗蚜威、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。对小麦白粉病、叶锈病,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。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
 
  (一)绿色防控技术
 
  重点推广生态调控、保护及利用天敌、免疫诱抗、生物农药等技术。对于条锈病、赤霉病、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赤霉病、条锈病、白粉病、叶锈病、蚜虫、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
 
  在病虫发生关键时期,选用对路药剂、用足药量水量、科学混配、交替用药,注意保护蜜蜂等非靶标生物;推广自走式喷杆喷雾机、植保无人飞机等高效施药机械,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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