, Volume 47, Issue 4, pp 301-310
Date: 28 Jul 2012

Temperature-dependent development and life table parameters of Thrips palmi (Thysanoptera: Thripidae) on eggplant

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The life history of Thrips palmi Karny on eggplant (Solanum melongena L.) leaves was studied based on the age stage and two sex-life tables at 16, 19, 22, 25, and 31 °C. The intrinsic rate of increase (r) at these temperatures was 0.0427, 0.0566, 0.0979, 0.1738, and 0.2237 day−1, respectively. The relationship among the gross reproductive rate (GRR), the net reproductive rate (R 0), and the pre-adult survivorship (l a) is consistent with R 0 < l a × GRR < GRR for all results at different temperatures. The mean generation time was 47.52, 38.33, 29.52, 19.81, and 13.88 days, respectively. The developments of pre-adult and adult stages were faster in males than in females. The means of developmental periods for each developmental stage decreased with increases of temperature. The maximum life span of female adults was noted at 56.67 days, whereas that of males was 50.66 days at 16 °C. The maximum female fecundity (64.18 eggs/female) was recorded at 25 °C and the lowest (23.38 eggs/female) at 16 °C. Life table data could be used to project population growth, to design mass rearing programs, and to establish management tactics to control insect pests.