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Development and life table parameters of Tetranychus turkestani (Acarina: Tetranychidae) at different constant temperatures

Karami-Jamour, T. and Shishehbor, P.

2012 - Volume: 52 Issue: 2 pages: 113-122

DOI: 10.1051/acarologia/20122037
Date received: 2011-08-25, Date accepted: 2012-03-02, Date published: 2012-06-22
(CC BY-NC-ND 2.0) © 2012 Karami-Jamour, T. and Shishehbor, P.

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Tetranychus turkestani; biology; life table parameters; temperature; cucumber; Cucumis sativa
Selected life history characteristics of the strawberry spider mite (Tetranychus turkestani Ugarov and Nikolski, Acarina: Tetranychidae) were studied at four constant temperatures (15, 20, 25 and 30 °C). Egg-to-adult developmental time of females ranged from 50.11 +/- 0.79 days at 15 °C to 7.73 +/- 0.14 days at 30 °C. An average of 140.33 +/- 5.49 degree-days was required to complete development above the lower thermal threshold (11.89 °C). Preimaginal mortality was 62.92, 16.67, 41.82 and 42.31% at 15, 20, 25 and 30 °C, respectively. Mean longevity of female T. turkestani ranged from 30.22 +/- 2.88 days at 15 °C to 5.78 +/- 0.10 days at 30 °C. Mean total fecundity ranged from 23.11 +/- 3.14 to 49.95 +/- 5.54 eggs / female. The sex ratio (% females) ranged from 69.00 +/- 0.04 to 83.01 +/- 0.02%. The intrinsic rate of population increase (rm) ranged from 0.272 +/- 0.010 at 30 °C to 0.033 +/- 0.002 (female per female per day) at 15 °C. The population doubled most quickly at 30 °C (2.54 +/- 0.09 d) and most slowly at 15 °C (20.46 +/- 1.59 d). Based on these results, we can predict the presence of the different stages of the strawberry spider mite on cucumber over time. This information will therefore enable us to determine more precisely the best time to control this pest.

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Photos: Varroa destructor (Varroidae) on a honey bee. Low temperature -Scanning electron microscopy photograph. Material collected and fixed for LT-SEM: J. Pettis, USDA-ARS-Bee Lab. and R. Ochoa, USDA-ARS-SEL; LT-SEM photo: E. Erbe and C. Pooley, USDA-ARS-CEMU © USDA; Petrobia harti (Tetranychidae) © INRA - Alain Migeon; Dermanyssus gallinae (Dermanysssidae) © Ecole Nationale Vétérinaire de Lyon - Lise Roy; Adult Ixodes sp. (Ixodidae) engorging on an Atlantic puffin Fratercula arctica © Andy Darrington; Panonychus ulmi (Tetranychidae): hatching of a winter egg © Université de Lausanne - Centre de microscopie électronique - Cazelles

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