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黃淮海地區大豆“癥青”防控技術指導意見
2022-05-27
08:40:11
來源:農業農村部種植業管理司 閱讀量:18186
評論
【農機網 政策與標準】 大豆“癥青”是以生物因素為主引起的一種成熟期莖葉持綠、不結實或少結實的植株生長發育異?,F象。近年來在黃淮海地區“癥青”問題較為突出,部分地區減產嚴重,致使生產者種植意愿下降,成為恢復和發展大豆生產的一大障礙。為有效控制“癥青”危害,保障大豆油料產能提升工程順利實施,農業農村部種植業管理司會同全國農技中心、大豆病蟲害防控重點實驗室、國家大豆產業技術體系,組織專家專題研討,基于現有科研結果,制定本指導意見。
一、防控策略
以大豆整個栽培過程為主線,在合理選用品種、種子處理、推行健身栽培等基礎上,加強大豆蚜、煙粉虱等傳毒昆蟲介體和點蜂緣蝽等直接致害昆蟲的種群動態監測,抓住大豆開花結莢關鍵時期,實施統防統治,提高“治蟲防病”效果和效率,降低大豆“癥青”發生幾率,減輕危害損失,保障生產安全。
二、防控重點
重點防控點蜂緣蝽、大豆蚜蟲、煙粉虱、小綠葉蟬、灰飛虱等刺吸類害蟲,及其可能傳播的大豆病毒病。
三、防控技術
(一)播種期。選擇適合當地種植、較為抗病(以往田間“癥青”發生相對較輕)的品種,推行合理密植和健身栽培。選用精甲·咯菌腈、丁硫·福美雙、噻蟲·福·萎銹等藥劑進行種子包衣或拌種處理,預防大豆根腐病、地下害蟲、蚜蟲、粉虱等苗期病蟲害,保障苗全苗勻苗壯。
(二)苗期—分枝期。重點防控蚜蟲、煙粉虱、葉蟬、灰飛虱等傳毒蟲媒,嚴防大豆病毒病發生流行。采用黃板誘集、掃網調查等方法,系統監測傳毒蟲媒發生量和發生期。當田間出現病毒株且傳毒蟲媒數量較大時,應及時采取化學防治措施“治蟲防病”、切斷傳播鏈,控制病毒病重發流行。防治藥劑可選用高氯·吡蟲啉、噻蟲·高氯氟等高效低毒品種。
同時,從大豆分枝期開始,在大豆田及其周邊布設信息素誘集設備,系統監測點蜂緣蝽種群數量,掌握其向大豆田遷移高峰期和數量,預判大豆田發生程度和最佳防控時期。
(三)開花—成熟期。點蜂緣蝽等刺吸鼓粒期豆莢,致使籽粒敗育或發育不良形成癟莢,進而導致植株源—庫關系失衡,是大豆“癥青”的關鍵成因之一。因此,應重點加強大豆花莢期蟲情監測和防控。
從監測到成蟲遷移或大豆始花期開始,定期開展大豆田間點蜂緣蝽種群數量和發育進度監測。當成蟲密度達到百株3-5頭,或卵塊、若蟲數量較高時,及時開展藥劑防治。重點發生區應組織聯防聯治、統防統治。鑒于大豆點蜂緣蝽防治還沒有正式登記的農藥品種,可因地制宜選用在大豆田已獲登記的高效氯氟氰菊酯、溴氰菊酯、氰戊菊酯、高氯·吡蟲啉、噻蟲·高氯氟等,在防治點蜂緣蝽等刺吸式害蟲的同時,兼治大豆食心蟲、豆莢螟等蛀莢類害蟲。
注意事項:采用無人機施藥時要注意添加增效劑、沉降劑,保證每畝1.5—2升的藥液量。噴施
殺蟲劑時,要嚴格按產品說明書推薦使用劑量,并進行安全操作。
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