【摘要】 在室温25℃、光照16 h、相对湿度20％条件下,组建了二斑叶螨实验种群生命表。结果表明,实验种群的内禀增长力rm为0．1817,周限增长率λ为1．1993d-1,净增殖率R0为25．863 2,平均世代周期T为 17．902 9 d,种群增长1倍需要3．814 5 d。更多还原

【Abstract】 The life table of experimental population of Tetranychus urticae Koch was established at constant temperature of 25 C , with illumination time of 16 hours and humidity of 20%. The results were as follows:The intrinsic increase rate (rm) is 0. 1817,the finite increase rate (A) 1. 199 3 d-1.the net reproductive rate (R0) 25. 863 2/generation ,the mean generation time (’I’) 17. 902 9 days and the doubling time (t) = 3. 814 5 days.更多还原