ISSN 1362-1971
An international journal of the Systematic and Applied Acarology Society, published since 1996
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ISSN 1362-1971 An international journal of the Systematic and Applied Acarology Society, published since 1996 [Aims] [Editors] [Content] [Subscriptions] [Contact details] [Society Homepage] |
Systematic & Applied Acarology
(2009) 14, 11–18.Effect of temperature on life history and life tables of
Eutetranychus orientalis (Klein) (Acari: Tetranychidae)ZEINAB IMANI & PARVIZ SHISHEHBOR
Dept. of Plant Protection, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran
E-mail: shishehborpf@yahoo.comAbstract
Selected life history characteristics of citrus brown mite,
Eutetranychus orientalis (Klein), were studied at four constant temperatures (20, 25, 30 and 35 ºC). Egg-to-adult developmental time of female ranged from 22.32 days at 20ºC to 12.43 days at 30ºC. An average of 305 degree-days was required to complete development above the lower threshold temperature (6.37 ºC). Preimaginal mortality was 19.61, 22.76, 43.11 and 100 % at 20, 25, 30 and 35ºC, respectively. Mean longevity of female E. orientalis ranged from 16.57 days at 20ºC to 7.50 days at 30ºC. Mean total fecundity ranged from 14.56 to 16.33 eggs / female. The sex ratio (female %) ranged from 75 to 80 %. Intrinsic rate of increase (rm) ranged from 0.144 at 30ºC to 0.094 (individual per female per day) at 20 ºC. The population had the ability to double with the shortest time at 30 ºC (4.79 d) to the longest time at 20ºC (7.33 d). These data can be used to develop computer simulation models to predict E. orientalis development and population dynamics.Key words:
Eutetranychus orientalis, biology, life table parameters, temperatureReferences
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