The effect of temperature on life history parameters of Tetranychus evansi (Acari: Tetranychidae) |
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| Authors: | Olivier Bonato |
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| Institution: | (1) Laboratoire d'Acarologie Fondamentale et Appliquée ORSTOM, Avenue Val de Montferrand-BP, Montpellier, France |
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| Abstract: | The effect of four constant temperatures (21, 26, 31 and 36°C) on biological (survival and duration of developmental stages, fecundity and longevity of females and sex ratio) and demographic parameters (R0, G, rm and ) of Tetranychus evansi was studied in the laboratory under controlled conditions: 75 ± 10% RH and 12L : 12D. The lower thermal threshold was 10.3°C. The shortest developmental time (6.3 days) was obtained at 36°C. Maximum fecundity was recorded at 31°C with 123.3 eggs per female. The highest intrinsic rate of increase (rm) (0.355) was obtained at 31°C. The optimal temperature for population growth seems to be 34°C. © Rapid Science Ltd. 1998 |
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| Keywords: | Acari Tetranychidae Tetranychus evansi biological demographic parameters tomato |
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