【目的】 为了探究福建省烟粉虱Bemisia tabaci（Gennadius）种群消长动态及其影响因素，提高监测与防控水平。【方法】 选择代表福建南北两地的漳州和建瓯蔬菜生产地开展露地和温室大棚烟粉虱种群数量的系统调查，并在室内测定了不同温度对烟粉虱生长发育及繁殖的影响。【结果】 漳州露地烟粉虱周年发生，种群季节性消长呈现两个高峰，即6月中下旬-7月上中旬的夏季高峰和11月上中旬的秋季高峰；建瓯大棚内烟粉虱亦周年发生，且与漳州露地种群消长动态基本同步；建瓯露地烟粉虱始见期为3月下旬，种群夏季高峰在7月中下旬，秋季高峰期在10月中下旬。烟粉虱卵、1龄若虫、2龄若虫、3龄若虫和4龄若虫+拟蛹的发育起点温度分别为13.77、14.98、9.60、7.97、12.56 ℃，有效积温分别为77.25、29.13、49.62、65.03和65.13日·度，结合2015-2017年气象资料，推算出烟粉虱在建瓯和漳州年发生代数分别为11-12代和13-14代。【结论】 气温是影响烟粉虱种群消长的关键因子，21-27 ℃是B型烟粉虱发育的适宜温度，低于20 ℃和高于30 ℃均不利于烟粉的生长发育和繁殖。当旬平均气温稳定在20 ℃以上时种群数量快速上升，当旬平均气温持续保持在30 ℃以上时种群数量呈回落态势。

 [Objectives]  To identify factors affecting the population dynamics of Bemisia tabaci (Gennadius) in Fujian province and thereby improve monitoring and control of this pest. [Methods]  Systematic surveys of B. tabaci populations in open fields and greenhouses were carried out in Zhangzhou and Jian’ou, sites in the northern and southern vegetable growing areas of Fujian, respectively. The effects of temperature on the development and fecundity of B. tabaci were evaluated in a laboratory. [Results]  B. tabaci were detected year-round in open fields in Zhangzhou. There were two population peaks; a summer peak from mid-June to mid-July and an autumn peak in mid-November. At Jian’ou B. tabaci were first observed in late March, with the summer population peak occurring in mid and late July, and the autumn peak in mid and late October. The developmental threshold temperature for eggs, 1st instar nymphs, 2nd instar nymphs, 3rd instar nymph and 4th instar nymphs were 13.77, 14.98, 9.60, 7.97 and 12.56 ℃, respectively, and the corresponding effective accumulated temperatures were 77.25, 29.13, 49.62, 65.03 and 65.13 degree-days, respectively. The annual number of generations in Jian’ou and Zhangzhou, deduced from weather data from 2015 to 2017, was 11-12 and 13-14, respectively. [Conclusion]  Temperature is a key factor affecting the population dynamics of B. tabaci and the optimal temperature range for the development of this pest was 21 to 27 ℃. Temperatures below 20 ℃, and above 30 ℃, were not suitable for development and reproduction. The laboratory population increased rapidly with increasing temperature when the 10-day^, average temperature was above 20 ℃. However, when the 10-day^, average temperature exceeded 30 ℃ it began to decline.