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| Field Efficacy Evaluation of Different Insecticides on Bemisia tabaci in Three Greenhouse Vegetables |
| WANG Wenlu，LIANG Peng，NING Jie，WU Mingyue，WANG Shaoli，XIE Wen |
| 〔1 State Key Laboratory of Vegetable Biobreeding，Institute of Vegetables and Flowers，Chinese Academy of Agricultural Sciences，Beijing 100081，China；2 National Nanfan Research Institute（Sanya），Chinese Academy of Agricultural Sciences，Sanya 572024，Hainan，China；3 Sanya Academy of Tropical Agricultural Sciences，Sanya 572000，Hainan，China〕 |
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Abstract The 70% imidacloprid WG，25% thiamethoxam WG，22.4% spirotetramat SC and 30% spirotetramat·thiamethoxam amine SC were selected for field efficacy evaluation against Bemisia tabaci on tomato，pepper and eggplant in autumn under the same greenhouse conditions．The results showed that the control effect（CE）of 30% spirotetramat·thiamethoxam amine SC 1 day after pesticide application on the three vegetables were all more than 50% indicating its good quick-effect，and the CE on the 14th day after application were all more than 60% indicating its good long-lasting efficacy．The CE of 25% thiamethoxam WG on pepper and eggplant were more than 70% on the 1st day after application，88%（7th day）and 68%（14th day），respectively．Therefore，25% thiamethoxam WG could be used as a preferred insecticide for controlling B.tabaci in pepper and eggplant．The highest CE of 22.4% spirotetramat SC on pepper and eggplant were up to 81.44% and 91.39% respectively on the 7th day after application，and maintained at about 60% within 14th days after application；the highest CE was 76.50% on the 14th day after application on tomato，and the duration was long，which could be used for long-term prevent for B. tabaci．Considering the quick-effect，persistence and stability of the control effect on different greenhouse vegetables，30% spirotetramat · clothianidin SC is recommended as the first choice for controlling B. tabaci in the field of autumn greenhouse vegetables in northern China，and 25% thiamethoxam WG and 22.4% spirotetramat SC can be reasonably mixed or rotated in order to delay the resistance of this pest and achieve the purpose of pesticide reduction．
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Received: 28 December 2022
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