【目的】 为明确强力源、有机硅和怀农特3种喷雾助剂对吡虫啉、阿维菌素、苦参碱的减量增效作用。【方法】 采用浸虫浸叶法和喷雾法开展烟粉虱Bemisia tabaci室内毒力测定和田间药效试验。【结果】 3种喷雾助剂对3种药剂的增效作用从高到低依次为强力源>有机硅>怀农特。施用吡虫啉、阿维菌素和苦参碱48 h后，烟粉虱若虫的LC₅₀分别为37.714 6、1.806 2和10.563 2 mg/L，添加强力源后烟粉虱若虫LC₅₀分别降低到13.018 8、1.099 0和2.711 6 mg/L；添加有机硅后烟粉虱若虫LC₅₀分别降低到16.190 0、1.271 9和3.160 9 mg/L；添加怀农特后LC₅₀分别降低到20.085 1、1.324 7和3.760 3 mg/L。田间试验结果表明，3种药剂减量20%和30%添加3种喷雾助剂均显著高于3种单剂的防效，3种药剂减量40%添加强力源和有机硅对烟粉虱的防效显著高于每种单剂，添加怀农特略高于或者与每种单剂的防效持平。施药后3 d，各处理对烟粉虱的防效达到最高，吡虫啉、阿维菌素、苦参碱减量20%添加强力源对烟粉虱的防效分别高达97.11%、90.83%、88.17%。施药7 d后吡虫啉减量40%添加3种喷雾助对烟粉虱的防效仍保持在75.55%-80.76%，阿维菌素减量40%添加3种喷雾助剂保持在71.84%-79.12%，苦参碱减量40%添加3种喷雾助剂保持在68.60%-75.74%。【结论】 3种药剂的常规用量减量20%-30%，并通过添加强力源、有机硅和怀农特3种喷雾助剂可提高对烟粉虱的防治效果。

[Objectives]  To determine the synergistic effect of combining three spray adjuvants; Qiangliyuan, Organosilicone and Huainongte, with imidacloprid, abamectin and matrine. [Methods]  An indoor toxicity bioassay and field trials were carried out using the leaf-dipping, pest-dipping and spray, methods. [Results]  The relative synergistic effect of the three spray adjuvants was as follows: Qiangliyuan> Organosilicone> Huainongte. Applying imidacloprid, abamectin and matrine for 48 h resulted in LC₅₀ values for Bemisia tabaci nymphs of 37.714 6, 1.806 2, and 10.563 2 mg/L, respectively. These LC₅₀ values were reduced to 13.018 8, 1.099 0, and 2.711 6 mg/L by the addition of Qiangliyuan, to 16.190 0, 1.271 9, and 3.1609 mg/L by the addition of Organosilicone and to 20.085 1, 1.324 7, and 3.760 3 mg/L by the addition of Huainongte. Field trials showed that the effectiveness of all three pesticides was significantly improved by the addition of the three spray adjuvants. The addition of Qiangliyuan and Organosilicone significantly increased the effectiveness of all three pesticides against B. tabaci, and the addition of Huainongte either slightly improved, or did not change, the effectiveness of each pesticide. The effectiveness of imidacloprid, abamectin, and matrine with added Qiangliyuan peaked three days after application, reaching 97.11%, 90.83% and 88.17%, respectively, despite the dosage of each pesticide being reduced by 20% by the addition of this adjuvant. Addition of all three adjuvants reduced the dosage of each pesticide by 40%. Nonetheless, the effectiveness of imidacloprid, abamectin and matrine seven days after application was 75.55%-80.76%, 71.84%-79.12% and 68.60%-75.74%. [Conclusion]  The effectiveness of imidacloprid, abamectin and matrine against B. tabaci can be significantly improved, and the dosage of these pesticides reduced by 20%-30%, by adding the adjuvants Qiangliyuan, Organosilicone and Huainongte.