唐家年 郑泽群 李志坚

摘 要：为了探究10.5%三氟甲吡醚乳油（EC）对园林害虫榕管蓟马的毒杀活性并为其田间应用技术提供依据，采用浸叶法进行了室内毒力测定和喷雾法进行田间防效试验。室内毒力测定表明，10.5%三氟甲吡醚EC对榕管蓟马成虫48hLC50值为76.62mg/L。田间防效试验表明，10.5%三氟甲吡醚EC在140mg/L剂量，药后1、3d时防效显著低于添加助剂赛特胜及400mg/L 40%毒死蜱乳油，而在药后7d其防效提高到79.99%。10.5%三氟甲吡醚EC对榕管蓟马具有较好毒杀活性，通过相应助剂的添加使用适合田间推广应用。

关键词：垂叶榕；蓟马；啶虫丙醚；药效

中图分类号 S482.3 文献标识码 A 文章编号 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

榕树在我国广东、广西、海南、福建等地广泛栽植，是常见的行道树，也是重要的盆景树种之一。在广东，榕管蓟马（Gynaikothripsuzeli Zimmerman）已成为园林景观树种垂叶榕（Ficusbenjamina L.）的常蛀性害虫，时常猖獗危害[1]。榕管蓟马原产于东南亚，随着国际园艺贸易与交流，目前该害虫已扩散到美国南部、巴西和阿根廷等国，国内云南、广西、广东、海南、福建、台湾和香港均有分布[2]。榕管蓟马属缨翅目（Thysanoptera）管蓟马科（Phlaeothripidae），虫体微小，成虫、若虫锉吸垂叶榕等榕树植物的嫩芽、嫩叶，致使形成大小不一的紫红褐色斑点，后沿中脉向叶面折叠，形成饺子状的虫苞，数头至数十头成虫、若虫在叶苞内吸食为害。受害严重者多数树叶成饺子状，且布满红褐色斑点，极大地降低了观赏价值。在该虫的药剂防治及除害处理研究中，先后使用过乐果敌百虫、混灭威、杀螟松乳剂、吡虫啉、万灵、氯氰菊酯、鱼藤精、阿维菌素、噻虫嗪、灭多威、辛硫磷、锐劲特等[3-6]。……