温度对二斑叶螨实验种群生长的影响
Effect of temperature on the population growth of Tetranychus urticae in laboratory
梁 妍，周玉书，刘洪敏
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作者单位：沈阳农业大学植物保护学院 沈阳 110161
中文关键词：二斑叶螨, 温度, 大樱桃, 生命表
英文关键词：Tetranychus urticae, temperature, cherry, life table
中文摘要：采用大樱桃叶片饲养二斑叶螨Tetranychus urticae Koch, 组建其在15, 20, 25, 30 和35℃下的实验种群生命表, 分析温度对二斑叶螨种群动态的影响。结果表明: 在试验的温度范围内, 二斑叶螨的发育速率随着温度的升高而加快, 并符合Logistic 模型。二斑叶螨全世代的发育起点温度和有效积温分别为11.85和170.39 日·度。计算出在不同温度下的实验种群的内禀增长率(rm) 、净增殖率(R0)、周限增长率(λ)、世代平均周期( T) 和种群加倍时间( t) 等种群参数。
英文摘要：The two spotted spider mite, Tetranychus urticae Koch, was fed with cherry leaves in laboratory. Life tables of laboratory population were constructed at 15, 20, 25, 30, and 35℃, respectively. The results showed that the developmental rate increased with the increasing temperature from 15℃to 35℃, and the relationship could be simulated by Log istic model. The threshold temperatures and the effective accumulated temperatures required for the whole generation were 11.85 and 170.39 degree day, respectively. According to the life tables of the laboratory population, the intrinsic rate of increase( rm ) , net reproductive rate( R0 ) , finite rate of increase(λ) , mean generation time (T) , and days for population to double( t) were established at different temperature.