| Summary: | 碩士 === 國立中興大學 === 昆蟲學系所 === 95 === The life history of Myzus persicae (Sulzer) (Homoptera: Aphididae) on kale (Brassica oleracea) was studied using the age-stage, two-sex life table. Populations of 1, 10, and 20 aphids were reared on a single kale leaf at constant temperature of 25°C. In addition, populations of single aphids were studied using potted seedlings at 25°C. The intrinsic rate of increase (r) at these population sizes was 0.067, 0.1724, -0.0171, and 0.3409 d-1, respectively, while the net reproductive rate (R0) was 2.73, 10.26, 0.76, and 43.91. The life expectancy of newborn (e01) was 11.86, 18.93, 10.81, and 21.48 d, and the mean generation time (T) was 14.83, 13.5, 16.06, and 11.1 d, respectively. At population size of 1, the growth performance of aphids reared on seedlings was better than for those reared on single leaves. Three factors affecting the survival of population were theoretically analyzed using the age-stage, two-sex life table: proportion of infertility, curtailed longevity, and last effective dispersal age. Moderate population size, shorter critical longevity and older effective dispersal age are advantageous for population survival.
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