十一星瓢虫在不同温度下的实验种群生命表

组建了十一星瓢虫在16℃、20℃、24℃、28℃和32℃下的实验种群生命表。结果表明：各 虫态的发育速率随温度的升高而加快，在16℃下世代的发育历期最长(64.2天)，而32℃时仅为16.4天，24℃和28℃时分别为27.1天和21.5天。卵、幼虫、蛹和世代的发育起点温度分别为10.9℃，11.1℃，12.5℃和10.6℃，有效积温分别为40.9，110.3，39.7，359.4日·度。成虫寿命随温度升高而逐渐缩短，16℃时最长，为34.7天，在32℃下最短，为14.1天； 单雌产卵量在24℃时最高，平均为463.8粒，32℃时最低，为96.4粒。在恒温24℃～28℃内, 十一星瓢虫的种群趋势指数和内禀增长力较高, 种群加倍时间较短。16℃时种群增长受到较大制约，种群趋势指数仅为24℃时的10.7%，种群加倍时间约22.3天，为24℃时的4.1倍。32℃时十一星瓢虫的发育历期缩短，存活率、繁殖力降低。

Life tables of the laboratory population of Coccinella undecimpunctata L. at different temperatures

Life tables of laboratory population of the Coccinella undecimpunctata L. were constructed at five temperatures. The results showed that the developmental rate increased with the temperature increasing from 16℃ to 32℃. The longest duration of the generation was 64.2 days observed at 16℃, the shortest was 16.4 days at 32℃, and in between 27.1 days and 21.5 days at 24℃ and 28℃, respectively. The threshold temperatures and the effective accumulated temperatures required for egg, larva, pupa and whole generation were 10.9℃, 11.1℃, 12.5℃, 10.6℃ and 40.9, 110.3, 39.7, 359.4 degree-day, respectively. The lifespan was shortened with the temperature increasing. The longest lifespan was 34.7 days at 16℃, while the shortest was 14.1 days at 32℃. The maximum number of eggs laid per female was 463.8 at 24℃, while the least was 96.4 at 32℃. It was so concluded from the results that temperature had great effect on the development of C. undecimpunctata. The most suitable temperature range was from 24℃ to 28℃, during which there were higher innate capacity of increase and the highest index of population trend, and the double population time was shortened. The increase rate of population at 16℃ was limited, with the index of population trends only 10.7% as high as that at 24℃; meanwhile double population time was 23.3 days, which was 4.1 times that at 24℃. The development duration, survival rate and fecundity of C. undecimpunctata was decreased at 32℃.