Abstract
Life table analysis and temperature-dependent development experiments were conducted to understand the biological characteristics of the cabbage aphid, Brevicoryne brassicae (Linnaeus) on detached Tah Tsai Chinese cabbage (Brassica campestris var. narinosa) leaves at seven constant temperatures (15, 18, 21, 24, 27, 30 and ; RH; 16L:8D). Mortality was lowest at with 18% and 0% at and nymphal stages, respectively. The developmental period of nymphal stage was 8.4 days at , and it decreased with increasing temperature. The developmental period of the nymphal stage was 6.7 days at . The lower threshold temperature calculated using a linear model was , and the effective accumulative temperature was 120.1DD. Adult longevity was 14.9 days at , and total fecundity was observed 58.5 at . According to the life table, the net reproduction rate was 47.5 at , and the intrinsic rate of increase and the finite rate of increase were 0.36 and 1.43, respectively, at . The doubling time was 1.95d at , and mean generation time was 7.43d at .
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