温度对椰心叶甲实验种群生长的影响

在不同温度(16、20、24、28和32 ℃)条件下观察椰心叶甲的发育、存活及繁殖情况.结果表明,椰心叶甲在32 ℃恒温下不能存活，在16～28 ℃世代发育起点温度为11.08 ℃，有效积温为966.22日·度，在海南省儋州市1年可发生4～5代.椰心叶甲世代存活率在28 ℃时最高，达92.5%.净增殖率、内禀增长率及周限增长率均在28 ℃时最高，分别为54.1、0.0260和1.0263.平均世代历期和种群加倍时间分别以20 ℃和28 ℃时最短，前者为123.1 d，后者为26.7 d.种群趋势指数以28 ℃时最高，为50.8，表明24～28 ℃为椰心叶甲种群生长的适合温度.

Effects of temperature on Brontispa longissima population growth

The study on the development, survival and reproduction of Brontispa longissima at 5 different temperature (16, 20, 24, 28, 32 degrees C) showed that the threshold temperature and effective accumulative temperature for the whole generations of Brontispa longissima were 11.08 degrees C and 966.22 degrees C, respectively, and 4-5 generations could occur in a year in Danzhou, Hainan Province. One generation had the highest survival rate (92.5%) at 28 degrees C, but failed to survive at 32 degrees C. Brontispa longissimna reared at 28 degrees C had the greatest intrinsic increasing rate (r(m) = 0.0260), finite increasing capacity (lamda = 1.0263), and population trend index (I = 50.8). The shortest mean generation time (123.1 d) and population doubling time (26.7 d) were obtained at 20 degrees C and 28 degrees C, respectively. The temperature from 24 degrees C to 28 degrees C was suitable for the development and reproduction of Brontispa longissima.