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Abstract
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The effects of temperature on developmental rate of Rhyncaphytoptus ficifoliae Keifer (Diptilomiopidae) were
determined at six constant temperatures (17, 20, 25, 30, 33 and 36 °C) on fig leaves. The total developmental
time of females decreased as temperature increased from 17 (21.62 days) to 33 °C (6.02 days), and then increased
at 36 °C (6.47 days). Using the ordinary and Ikemoto and Takai (2000) linear models the estimated lower
temperature thresholds (Tmin) for total developmental time of females were 10.78 and 10.37 °C and the constant
temperatures (k) were 140.25 and 144.78°-days (DD), respectively. Data also were fitted to SSI nonlinear
temperature-dependent model. The estimated TL, intrinsic optimum temperature (TФ) and Th for total immature
stages of females by SSI model were 11.11, 23.72 and 37.98 °C, respectively. With use of the obtained data from
rearing R. ficifoliae under constant temperatures in laboratory and temperature data in Khorramabad region in
2017, the real developmental rate of this mite in natural conditions was described. The highest (100%) and
lowest values (51.67%) of survival rate for immature stages were found at 25 and 36 °C, respectively. The
presented information could be used to predict the population dynamics of main pest R. ficifoliae for an effective
management.
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