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根据2005～2010年应用塑料黄板涂抹机油系统诱集烟粉虱成虫以及烟粉虱的饲养观察结果表明,烟粉虱在临海地区年可发生11代;其越冬的临界温度为旬平均气温8.5℃。随着寄主植物的生长,成虫逐渐向上部叶片转移,并形成植株自上而下为成虫(初产卵)、若虫和蛹壳(伪蛹)的虫态垂直分布状态。其全年种群数量消长主要呈双峰型曲线变化,其中夏峰期一般在5月中旬至9月上旬;秋峰期一般在10月中旬至11月下旬。影响种群数量消长的主要因素有种群基数、气候条件、耕作制度和洪涝淹没等。其中关键在于气温条件,即烟粉虱虫口密度(M)随气温(T℃)的变化而变化,其线性关系模型为M=0.607T-4.064 5,n=36;r=0.682 6**;其曲线关系模型为M=0.007 1T2+0.351 3T-2.218 8,n=36;r=0.684 6**。当旬平均气温在8～10℃时种群处存活临界状态;当旬平均气温在10～20℃时种群数量处低密度状态,并呈低位运行;当旬平均气温处20℃以上种群数量增速较快,并随气温升高而升高;当旬平均气温处30℃以上时种群数量有所回落,并出现相对低谷期。随后种群数量又回升成峰,并对秋季蔬菜产生较重为害。
According to the application of plastic yellow board smear oil system from 2005 to 2010, the adults of Bemisia tabaci and the control of Bemisia tabaci were observed. The results showed that Bemisia tabaci met the 11th generation in Linhai area. The overwintering critical temperature was 8.5 ℃. With the growth of the host plant, the adults gradually transferred to the upper leaves and formed the vertical distribution state of the plants from the top to the bottom of the adult (primipara), nymphs and pupae (pseudo-pupal). The population fluctuation of the whole year mainly showed a bimodal curve, in which summer peak was generally from mid-May to early September, autumn peak was generally from mid-October to late November. The main factors affecting population growth and decline are population base, climatic conditions, farming system and flood inundation. The key point is the temperature condition, that is, the population density (M) of B. tabaci varies with the temperature (T ℃). The linear relationship model is M = 0.607T-4.064 5, n = 36; r = 0.682 6 **; The curve of the model for the M = 0.007 1T2 + 0.351 3T-2.218 8, n = 36; r = 0.684 6 **. When the average temperature was between 8 ℃ and 10 ℃, the population survived the critical condition. When the average temperature was between 10 ℃ and 20 ℃, the population density was low, and the population was above 20 ℃. Faster, and with the temperature rise and rise; when the average temperature at 30 ℃ above the population number has declined, and the relative trough period. The population then rose back to peak, with heavy damage to autumn vegetables.