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2024年保護地蔬菜重要害蟲生物防治技術方案
2024-03-28
08:33:47
來源:全國農業技術推廣服務中心 閱讀量:12268
評論
【農機網 科技創新】保護地蔬菜害蟲種類多,常年發生的主要有蚜蟲、粉虱、薊馬和害螨等,蟲量大、世代重疊、抗藥性高、危害重;偶發的有潛葉蠅、棉鈴蟲、甜菜夜蛾等。利用生物防治技術是保障蔬菜質量安全、推進綠色植保的有效途徑。為推動害蟲的生物防治工作,特制定本方案。
一、防控目標
保護地蔬菜重要害蟲防治處置率90%以上,害蟲總體防控效果80%以上,危害損失率控制在10%以內,保障蔬菜生產及產品安全。
二、防控策略
針對保護地蔬菜害蟲發生特點,采取“實時監測、提前預防、壓前控后、多策并舉”策略,以健康栽培、物理隔離和生態調控等技術為基礎,以釋放天敵和應用生物農藥為主要手段,將害蟲控制在經濟危害水平以下。
三、生物防治應用保障技術
(一)物理阻隔
蔬菜定植前安裝防蟲網。在棚室旁設置緩沖間,門口和入口及上、下通風口安裝60目防蟲網,阻斷害蟲侵入。
(二)健康栽培
1.環境控制。確保保護地溫濕度、光照、通風和密閉性控制良好,適宜蔬菜生長。
2.清潔棚室。前茬蔬菜采收后及時拉秧清棚,徹底清除殘枝、落葉、落果、雜草、裸根等,于棚外集中無害化處理。密閉熏蒸或藥劑均勻噴灑墻壁、棚膜、緩沖間1—2次。
3.土壤消毒。定植前使用土壤消毒劑殺滅病蟲源,處理后增施枯草芽孢桿菌、木霉菌等有益菌劑。
4.健身栽培。潔凈種苗,合理密植,施用氨基寡糖類、蛋白質免疫誘抗劑等,提升植株抗病蟲能力。
(三)生態調控
1.種植蜜源植物。棚間空地種植金盞菊、波斯菊、苜蓿、芝麻和蛇床子等植物。
2. 種植驅避植物。棚內在通風口區種植茴香、萬壽菊、除蟲菊等植物。
3. 種植誘集植物。茄果類蔬菜定植時,在其種植行的兩端和中間位置各種1株甜瓜,每隔4行種植1組,或瓜類蔬菜溫室用盆栽的苘麻置于行間,高效誘集粉虱類害蟲。
四、生物防治技術
(一)天敵應用技術
定植后,監測害蟲種群發生情況,在害蟲發生初期即采用相應防治措施。
1.防治粉虱類害蟲
天敵品種:麗蚜小蜂等
釋放技術:定植后,監測發現害蟲即可釋放天敵,麗蚜小蜂按2000頭/畝,隔7—10天釋放一次,連續釋放3—5次。
2. 防治薊馬類害蟲
天敵品種:小花蝽類、胡瓜新小綏螨、巴氏新小綏螨和劍毛帕厲螨。
釋放技術:定植后,監測發現害蟲即可釋放天敵。小花蝽類天敵按500頭/畝,隔7—10天釋放一次,連續釋放2—4次;或根部撒施劍毛帕厲螨100—200頭/平方米,同時葉部撒施巴氏新小綏螨或胡瓜新小綏螨100—200頭/平方米,每2周釋放一次,連續釋放2—3次。
3. 防治害螨
天敵品種:智利小植綏螨、加州新小綏螨、巴氏新小綏螨。
釋放技術:定植后,監測發現害螨即可釋放捕食螨。葉部撒施智利小植綏螨5—10頭/平方米,點片發生時中心株釋放30頭/平方米,每2周釋放一次,釋放3次。或葉部撒施加州新小綏螨300—500頭/平方米,每周釋放一次,連續釋放3—5次,或釋放巴氏新小綏螨,方法同加州新小綏螨。
4. 防治蚜蟲類害蟲
天敵品種:蚜繭蜂、草蛉、食蚜癭蚊、瓢蟲。
釋放技術:定植后,監測發現害蟲即可釋放天敵。蚜繭蜂按2000—4000頭/畝,或草蛉(繭)按300—500頭/畝,或食蚜癭蚊按300—500頭/畝,每周釋放一次,連續釋放2—3次。或瓢蟲(成蟲)按1:60益害比釋放,或瓢蟲(卵)按2000頭/畝,釋放2—3次。
5. 防治鱗翅目害蟲
天敵種類:赤眼蜂類、蠋蝽等
釋放技術:定植后,監測發現害蟲即可釋放天敵。赤眼蜂類按10000頭/畝,或蠋蝽按20—30頭/畝,隔5—7天釋放一次,連續釋放3次。
(二)生物農藥防治技術
當釋放天敵不能夠有效控制保護地害蟲時,可使用生物農藥進行防治,使用前需確定生物農藥與天敵的兼容性,降低其對天敵的影響。粉虱類、蚜蟲類和薊馬類可選用除蟲菊素、苦參堿、魚藤酮、藜蘆根莖提取物、綠僵菌、球孢白僵菌、多殺霉素等藥劑;鱗翅目害蟲可選用短穩桿菌、蘇云金桿菌、印楝素、核型多角體病毒等藥劑。
五、注意事項
(一)釋放天敵宜在保護地蔬菜上使用,注意天敵不耐儲存,應盡早釋放,不可置于陽光下暴曬。
(二)釋放天敵后,避免施用化學殺蟲殺螨劑,2天內盡量減少農事操作,以利于天敵轉移到植株上。
(三)有避光、避高溫要求的生物藥劑宜在陰天或下午4點以后施藥。
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