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2024年小麥春季重大病蟲害防控技術(shù)方案
2024-03-11
11:54:55
來源:全國農(nóng)業(yè)技術(shù)推廣服務(wù)中心 閱讀量:19957
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【農(nóng)機(jī)網(wǎng) 熱點(diǎn)關(guān)注】 據(jù)全國農(nóng)技中心預(yù)測分析,2024年春季小麥赤霉病、條銹病、白粉病、紋枯病、莖基腐病、蚜蟲、葉螨、吸漿蟲等病蟲害總體偏重發(fā)生,尤其是開春以來,我國黃淮東南部、江淮、江漢、江南等地遭遇兩次低溫雨雪冰凍天氣,麥田濕度大,隨著氣溫回升,紋枯病、莖基腐病等土傳病害發(fā)生有加快擴(kuò)展蔓延的趨勢。為有效控制病蟲危害、助力小麥大面積單產(chǎn)提升,確保小麥豐產(chǎn)豐收,制定本方案。
一、防控目標(biāo)
全國實(shí)現(xiàn)病蟲害防治處置率 95% 以上,綠色防控覆蓋率 58% 以上,綜合防治效果 85% 以上,危害損失率控制在 5% 以內(nèi);優(yōu)質(zhì)小麥生產(chǎn)基地、綠色防控示范基地、省部級綠色高產(chǎn)高效示范片實(shí)現(xiàn)統(tǒng)防統(tǒng)治全覆蓋。
二、防控策略
堅持因地制宜、分區(qū)施策、分類指導(dǎo)的原則,抓住重大病蟲、重點(diǎn)區(qū)域、關(guān)鍵時期,開展綜合防治和統(tǒng)防統(tǒng)治,強(qiáng)化綠色防控、科學(xué)用藥、農(nóng)藥減量,提高防控效果,實(shí)現(xiàn)小麥病蟲防控目標(biāo),保障小麥生產(chǎn)安全和質(zhì)量安全。
三、重點(diǎn)防控對象
重點(diǎn)防控小麥赤霉病、條銹病、蚜蟲等一類病蟲害,以及莖基腐病、紋枯病等莖基部病害,兼顧白粉病、葉銹病、吸漿蟲等常發(fā)病蟲。
(一)華北麥區(qū)。以紋枯病、莖基腐病、白粉病和蚜蟲防治為主,兼顧銹病、赤霉病、葉螨和吸漿蟲等。
(二)黃淮麥區(qū)。以條銹病、莖基腐病、赤霉病、紋枯病、蚜蟲等病蟲為重點(diǎn),兼顧白粉病、葉銹病、根腐病、葉螨防控;黃淮南部應(yīng)加強(qiáng)赤霉病預(yù)防。
(三)長江中下游麥區(qū)。以赤霉病、紋枯病、蚜蟲為主,兼顧白粉病、條銹病等病蟲。
(四)西北麥區(qū)。以條銹病、莖基腐病、蚜蟲為主,兼顧赤霉病、白粉病、葉螨、吸漿蟲等病蟲;新疆麥區(qū)需關(guān)注雪霉葉枯病。
(五)西南麥區(qū)。以條銹病、赤霉病、葉螨為主,兼顧白粉病、蚜蟲等。
四、防控措施
(一)返青拔節(jié)期
以防治條銹病、紋枯病、莖基腐病為重點(diǎn),挑治蚜蟲和葉螨。對條銹病,要加強(qiáng)病情監(jiān)測,實(shí)施分區(qū)防控。西南、漢水流域和陜西關(guān)中、河南南部、甘肅隴南等主要冬繁區(qū),要全面落實(shí)“帶藥偵查、打點(diǎn)保面”防治策略,及時封鎖發(fā)病田塊,減少菌源外傳,降低和延緩向黃淮、長江中下游和華北麥區(qū)擴(kuò)散蔓延。在越夏區(qū),春季要加強(qiáng)轉(zhuǎn)主寄主小檗周邊自生麥苗及麥秸管理,控制條銹菌有性生殖,降低病菌毒性變異速率。黃淮春季流行區(qū),堅持“發(fā)現(xiàn)一點(diǎn),防治一片”,及時控制發(fā)病中心;當(dāng)田間平均病葉率達(dá)到 0.5%—1% 時,組織開展大面積應(yīng)急防控,做到同類區(qū)域防治全覆蓋。防治藥劑可選用戊唑醇、氟環(huán)唑、丙環(huán)唑、嘧啶核苷類抗菌素、丙硫菌唑·戊唑醇等。對紋枯病,于小麥拔節(jié)初期,田間病株率達(dá) 10% 時主動施藥防治,防治藥劑可選用井岡·蠟芽菌、噻呋酰胺、戊唑醇、丙環(huán)唑、烯唑醇、井岡霉素、多抗霉素等。對莖基腐病,于小麥返青拔節(jié)期,選用丙硫菌唑、丙硫唑、葉菌唑、氰烯菌酯、戊唑醇、苯醚甲環(huán)唑、氯氟嘧菌唑等藥劑防治。對紋枯病、莖基腐病等莖基部病害的防治,要注意加大水量,將藥液噴淋在麥株莖基部,以確保防治效果。
對葉螨,當(dāng)平均 33厘米行長螨量達(dá) 200 頭時,選用阿維菌素、聯(lián)苯菊酯、聯(lián)苯·三唑磷等藥劑噴霧防治,同時可通過中耕除草、合理肥水等農(nóng)業(yè)措施,降低田間蟲量。對蚜蟲,當(dāng)蚜量達(dá)到百株 200 頭時,應(yīng)選用啶蟲脒、噻蟲胺、高效氯氰菊酯、抗蚜威等藥劑及時開展防治。
如果多種病蟲同時發(fā)生,可分別選擇對路農(nóng)藥混配防治,提高防治效率;在病蟲防控的同時,可結(jié)合當(dāng)?shù)孛缜?,添加生長調(diào)節(jié)或免疫誘抗劑如蕓苔素內(nèi)酯、赤·吲乙·蕓苔、氨基寡糖素、二氫卟吩鐵、噻苯隆、免疫激活蛋白等,提高抗病蟲和抵御倒春寒等能力,提高病蟲防控效果。
(二)抽穗揚(yáng)花期
以預(yù)防赤霉病為主,兼顧銹病、白粉病、吸漿蟲等。對赤霉病,長江中下游和黃淮南部等常年病害流行區(qū),應(yīng)抓住齊穗至揚(yáng)花初期關(guān)鍵時期,主動預(yù)防,遏制病害流行,藥劑品種可選用氰烯菌酯、丙硫菌唑、氟唑菌酰羥胺、戊唑醇、丙唑·戊唑醇、葉菌唑、氰烯·戊唑醇、枯草芽孢桿菌、井岡·蠟芽菌等,要用足藥液量,施藥后遇雨,應(yīng)及時補(bǔ)治;如抽穗揚(yáng)花期遇連續(xù)陰雨天氣,需隔 5—7 天再輪換用藥防治 1—2 次,確保防治效果。苯丙咪唑類藥劑抗性水平高的地區(qū),應(yīng)停止使用多菌靈、甲基硫菌靈等藥劑,提倡輪換用藥和組合用藥。對華北、西北赤霉病偶發(fā)區(qū),應(yīng)關(guān)注抽穗揚(yáng)花期天氣預(yù)報,因地制宜實(shí)施主動預(yù)防。
對小麥吸漿蟲,應(yīng)重點(diǎn)做好抽穗期的成蟲防治。在抽穗初期10復(fù)網(wǎng)20頭以上成蟲時,及時選用阿維·吡蟲啉、高效氯氟氰菊酯、氯氟·吡蟲啉等農(nóng)藥進(jìn)行防治,重發(fā)區(qū)間隔 3 天輪換用藥,再防治 1 次。
對小麥白粉病、葉銹病,可以結(jié)合防治條銹病、赤霉病進(jìn)行兼治;當(dāng)田間病葉率達(dá) 10% 時,選用環(huán)丙唑醇、腈菌唑、丙環(huán)唑、氟環(huán)唑等殺菌劑進(jìn)行防治,嚴(yán)重發(fā)生田塊,應(yīng)間隔 7—10 天再輪換用藥防治 1 次。
(三)灌漿期
重點(diǎn)防控麥穗蚜、白粉病和葉銹病,提倡綜合用藥,達(dá)到一噴多效。當(dāng)田間百穗蚜量達(dá) 800 頭以上,益害比(天敵:蚜蟲)低于 1:150 時,可選用啶蟲脒、吡蚜酮、抗蚜威、高效氯氟氰菊酯、苦參堿、耳霉菌等藥劑噴霧防治。有條件的地區(qū),提倡釋放蚜繭蜂等天敵昆蟲進(jìn)行生物防治。對小麥白粉病、葉銹病,當(dāng)田間病葉率達(dá) 10% 時,選用環(huán)丙唑醇、腈菌唑、丙環(huán)唑、氟環(huán)唑等殺菌劑進(jìn)行防治,嚴(yán)重發(fā)生田,應(yīng)隔 7—10 天再噴 1 次??山Y(jié)合小麥“一噴三防”,實(shí)施
殺蟲劑、殺菌劑、植物生長調(diào)節(jié)劑科學(xué)混用,綜合控制病蟲,助力單產(chǎn)提升行動。
五、主推技術(shù)
(一)綠色防控技術(shù)
重點(diǎn)推廣生態(tài)調(diào)控、保護(hù)及利用天敵、免疫誘抗、生物農(nóng)藥等技術(shù)。對于條銹病、赤霉病、蚜蟲等重大病蟲,要加強(qiáng)監(jiān)測預(yù)警,及早發(fā)現(xiàn)、及時處置;對重點(diǎn)區(qū)域,應(yīng)加強(qiáng)病情普查,必要時組織開展專業(yè)化應(yīng)急防控,防止病蟲大面積暴發(fā)危害。
(二)穗期“一噴三防”技術(shù)
小麥抽穗至灌漿期是赤霉病、條銹病、白粉病、葉銹病、蚜蟲、吸漿蟲等多種病蟲同時發(fā)生危害的關(guān)鍵期,可選用高效對路的殺菌劑、殺蟲劑、葉面肥、免疫激活蛋白、調(diào)節(jié)劑和農(nóng)藥助劑等科學(xué)混用,綜合施藥,提高作物的免疫力,防病蟲防早衰防干熱風(fēng),達(dá)到一噴多效、農(nóng)藥減量和單產(chǎn)提升的效果。
(三)科學(xué)用藥技術(shù)
在病蟲發(fā)生關(guān)鍵時期,選用對路藥劑、用足藥量水量、科學(xué)混配、交替用藥,注意保護(hù)蜜蜂等非靶標(biāo)生物;推廣自走式噴桿
噴霧機(jī)、植保無人飛機(jī)等高效施藥機(jī)械,使用植保無人飛機(jī)施藥時,應(yīng)添加相應(yīng)的沉降、抗蒸發(fā)等功能的助劑,每畝用水量不低于 1.5 升,確保防治效果。
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