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2009年46 No.6
Life tables of laboratory population of Hippodamia variegate at different temperatures.
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Key Words:Hippodamia variegate, laboratory population, temperature, life table
Abstract: Life tables of laboratory population of Hippodamia variegate (Goeze) were constructed at six temperatures. The results showed that the developmental rate increased with the temperature increasing from 13℃ to 33℃。The longest duration of one generation was 62.23 days observed at 13℃, and the shortest was 10.92 days at 33℃. The adult lifespan was shortened with temperature increasing. The longest lifespan was 71.39 days at 13℃, while the shortest was 11.95 days at 33℃. Net reproduction rate (R0) of 25℃ was the biggest one (31.42), and the smallest one was 1.40 at 13℃.The highest intrinsic growth rate (rm) was 0.21 at 33℃, while the lowest was 3.87×10-3 at 13℃. Stable age distribution at 29℃ was most stable, in which cluded 36.54% egg, 22.95% 1st instar, 7.56% 2nd instar, 11.05% 3rd instar, 10.11% 4th instar, 5.65% pupa, and 6.13% adult.