陕北Q型烟粉虱实验种群生命表

Life Table of the Laboratory Population of Q-Biotype Bemisia tabaci (Gennadius)

摘要: 设置15℃、20℃、25℃、30℃、35℃、40℃六个不同梯度的温度，在各个温度的条件下观察陕北Q型烟粉虱各个时期的生长状况。构建不同温度下陕北Q型烟粉虱实验种群生命表。实验结果表明：在20℃~35℃温度范围内，陕北Q型烟粉虱的成长期随温度的升高而缩短。卵期、若虫期和世代历期的发育起点温度分别为10.38℃、12.89℃、11.21℃；有效积温为632.38、842.45、1227.39日度。种群趋势指数(I)均大于1，内禀增长力(rm)均大于0，Q型烟粉虱种群呈增长趋势。该虫发育适宜温度为25℃~30℃。

Abstract: Experimental population of Q-biotype Bemisia tabaci was observed in terms of development and mortality under different temperatures, 15˚C, 20˚C, 25˚C, 30˚C, 35˚C or 40˚C, based on which its life table was set up. The results showed that the developmental rate increased with the temperatures from 20˚C to 35˚C. The threshold temperatures for the development of nymphal, preoviposition and a generation of the Q-biotype Bemisia tabaci were 10.38˚C, 12.89˚C and 11.21˚C, respectively, and the effective cumulative temperatures were 632.38 degree day, 842.45 degree day and 1227.39 degree day, respectively. The innate capacity of natural increase (rm) was higher than 0, and the population trend index was higher than 1. The population of Q-biotype Bemisia tabaci increased at the temperatures from 20˚C to 35˚C. The suitable temperature for development of Q-biotype Bemisia tabaci was found to be between 25˚C to 30˚C.