10.5%三氟甲吡醚乳油對榕管薊馬室內毒力及田間防效試驗

唐家年 鄭澤群 李志堅

摘 要：為了探究10.5%三氟甲吡醚乳油（EC）對園林害蟲榕管薊馬的毒殺活性并為其田間應用技術提供依據，采用浸葉法進行了室內毒力測定和噴霧法進行田間防效試驗。室內毒力測定表明，10.5%三氟甲吡醚EC對榕管薊馬成蟲48hLC50值為76.62mg/L。田間防效試驗表明，10.5%三氟甲吡醚EC在140mg/L劑量，藥后1、3d時防效顯著低于添加助劑賽特勝及400mg/L 40%毒死蜱乳油，而在藥后7d其防效提高到79.99%。10.5%三氟甲吡醚EC對榕管薊馬具有較好毒殺活性，通過相應助劑的添加使用適合田間推廣應用。

關鍵詞：垂葉榕；薊馬；啶蟲丙醚；藥效

中圖分類號 S482.3 文獻標識碼 A 文章編號 1007-7731（2018）13-0060-02

Abstract：The study aims to explore the insecticidal activity of pyridalyl to a garden pest，Gynaikothripsuzeli Zimmerman，and provide the basis for its field application technology.The leaf-dipping method was used to evaluate the insecticidal activity of pyridalyl against G.uzeli，meanwhilethe spraying method was conducted in the field.Laboratory bioassay indicated that LC50 value of pyridalyl at 48h was 76.62 mg/L.The field efficacy results indicated that pyridalyl10.5% EC atapplication rate of 140 mg/L was the lowest compared with“pyridalyl 10.5% EC + auxiliaries SAITESHENGTM”and chlorpyrifos40% EC at application rate of 400 mg/L on 1st and 3rd day while it could provide 79.99% efficacy control on the 7th day.Pyridalyl 10.5% EC has good insecticidal activity against G.uzeli，and it is worthy of being popularized if appropriate adjuvants added.

Key words：Ficusbenjamina；Thrip；Pyridalyl；Efficacy control

榕樹在我國廣東、廣西、海南、福建等地廣泛栽植，是常見的行道樹，也是重要的盆景樹種之一。在廣東，榕管薊馬（Gynaikothripsuzeli Zimmerman）已成為園林景觀樹種垂葉榕（Ficusbenjamina L.）的常蛀性害蟲，時常猖獗危害[1]。榕管薊馬原產于東南亞，隨著國際園藝貿易與交流，目前該害蟲已擴散到美國南部、巴西和阿根廷等國，國內云南、廣西、廣東、海南、福建、臺灣和香港均有分布[2]。榕管薊馬屬纓翅目（Thysanoptera）管薊馬科（Phlaeothripidae），蟲體微小，成蟲、若蟲銼吸垂葉榕等榕樹植物的嫩芽、嫩葉，致使形成大小不一的紫紅褐色斑點，后沿中脈向葉面折疊，形成餃子狀的蟲苞，數頭至數十頭成蟲、若蟲在葉苞內吸食為害。受害嚴重者多數樹葉成餃子狀，且布滿紅褐色斑點，極大地降低了觀賞價值。在該蟲的藥劑防治及除害處理研究中，先后使用過樂果敵百蟲、混滅威、殺螟松乳劑、吡蟲啉、萬靈、氯氰菊酯、魚藤精、阿維菌素、噻蟲嗪、滅多威、辛硫磷、銳勁特等[3-6]。……