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通过对新疆苜蓿叶象甲第1代自然种群数量动态规律的研究,组建了自然种群生命表,存活曲线属于Price A型,曲线显示种群数量减少最大的阶段是生命早期卵至二龄期。决定因子Leroux r2分析法表明,三龄期的大风、四龄被寄生、蛹期和二龄的感病是影响种群年度间数量变动的关键因子。种群的内禀增殖力为0.15,周限增长率为1.15,趋势控制指数IPC为11.92,单雌平均产卵量307.56粒,经过一个世代种群的净增殖力为4.75。Leslie转移矩阵预测第二代成虫数量将是第一代的3.68~5.00倍。
By studying the dynamics of the natural population of the first generation of Alfalfa leaf weevil in Xinjiang, the natural population life table was established. The survival curve is in the form of Price A, and the curve shows that the largest reduction in the population is from the early egg life to the second instar. Determinants Leroux r2 analysis showed that the third-instar gale, fourth instar parasitism, pupal and second-instar infections were the key factors affecting the quantitative change between years. Intrinsic fecundity of population was 0.15, growth rate of perimeter was 1.15, trend control index (IPC) was 11.92, average number of oviposition of one female was 307.56, net progeny of one generation was 4.75. The Leslie transfer matrix predicts that the number of second-generation adults will be 3.68 to 5.00 times that of the first generation.