【目的】 明确新型杀虫剂溴虫氟苯双酰胺对不同发育阶段烟粉虱Bemisia tabaci的毒力与防治效果。【方法】 采用室内浸叶法，测定溴虫氟苯双酰胺对烟粉虱卵、若虫和成虫的毒力，并采用喷雾法进行不同虫态的防治效果试验。【结果】 溴虫氟苯双酰胺对烟粉虱卵和成虫的毒力较低，LC₅₀分别为959.168和2 935.736 mg/L，对1龄和2龄若虫的毒力较高，LC₅₀分别为3.212和27.602 mg/L。在防效试验中，溴虫氟苯双酰胺1 000、2 000和3 000倍液对卵和成虫的防效较差，对卵的防效低于9.38%，对成虫的防效在2.31%-35.38%之间，但对1龄若虫有很好的防治效果，药后10 d的防效分别为92.76%、82.50%和70.11%，14 d后的防效分别为93.82%、80.08%和72.53%；溴虫氟苯双酰胺对2龄及以上未成熟期混合虫态的防效较差，1 000、2 000和3 000倍液药后7 d的防效分别为50.54%、36.56%和25.49%，但均高于对照药剂氟啶虫胺腈2 000倍液的14.49%，药后14 d防效分别为57.74%、48.49%和22.26%，高于22%氟啶虫胺腈     2 000倍液的18.70%。【结论】 溴虫氟苯双酰胺除对烟粉虱低龄若虫有较高活性，对其他发育阶段的烟粉虱毒力较低。针对烟粉虱不同虫态的药剂敏感性，可混用氟啶虫胺腈和阿维菌素等药剂进行科学有效的防治。

[Aim]  To evaluate the toxicity and control efficacy of broflanilide, a pesticide with a novel mode of action, for controlling whitefly, Bemisia tabaci. [Methods]  We tested the toxicity of broflanilide on B. tabaci eggs, nymphs, and adults in the laboratory using a leaf dipping method. Control efficacy experiments were conducted in the greenhouse using a spraying method. [Results]  Our results demonstrate that broflanilide has low toxicity in B. tabaci eggs and adults, with LC₅₀ values of 959.17 and 2 935.74 mg/L, respectively. In contrast, broflanilide was more toxic to 1st and 2nd instar nymphs, with LC₅₀ values of 3.21 and 27.60 mg/L, respectively. Broflanilide exhibited limited control against eggs and adults, with an efficacy of less than 9.38% for eggs, and 2.31% to 35.38% for adults. In contrast, broflanilide displayed high efficiency against 1st instar nymphs in the greenhouse, with a control efficacy of 92.76%, 82.50%, 70.11% and 93.82%, 80.08%, 72.53%, on days 10, 11, 12, 13 and 14 post-treatment, respectively. The control efficacy of broflanilide for immature stages from 2nd instar nymphs to pupae was low at 1 000 (50.54%), 2 000 (36.56%), and 3 000 (25.49%) times dilution, but higher than that of sulfoxaflor at   2 000 times dilution (14.49%) after 7 d of treatment. The control efficacy 14 d after treatment was 57.74%, 48.49%, and 22.26%, respectively, higher than the 18.70% of broflanilide. [Conclusion]  This study demonstrated low broflanilide toxicity in all developmental stages of B. tabaci except 1st instar nymphs. Combining broflanilide with sulfoxaflor or avermectin could improve the control efficacy of B. tabaci by targeting different developmental stages.