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13 June 2016 The effect of temperature on life history and demographic parameters of Eotetranychus frosti (Acari: Tetranychidae)
Fatemeh Jafarian, Shahriar Jafari
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Eotetranychus frosti (McGregor) is one of the major pests of apple trees in Iran. This mite damages the leaves of the apple trees and affects the quality and quantity of the fruit. We studied the life table parameters of this phytophagous mite at six constant temperatures (16, 22, 27, 30, 33.5 and 37°C) under laboratory conditions at 50±5% relative humidity (RH) and a photoperiod of 16:8 h (light: dark), fed on apple leaves. The longest and shortest oviposition periods were recorded at 16°C (37.97 days) and 37°C (7.63 days), respectively. Adult longevities of E. frosti females were influenced by temperature, ranging from 45.59 days at 16°C to 9.37 days at 37°C. Lifetime fecundity of E. frosti at 16°C was 88.10 eggs, 118.69 eggs at 22 °C and 36.71 eggs at 37°C. The intrinsic rate of increase (rm) significantly differed among tested temperatures, lowest at 16°C (0.0935 day-1) and highest at 37°C (0.346 day-1). The finite rate of increase (λ) was highest at 37°C (1.414 day-1) and lowest at 16°C (1.098 day-1). With increasing temperature from 16°C to 37°C, the mean generation time (T) significantly shortened from 42.28 to 9.26 days. Minimum and maximum values of doubling time (DT) were 1.10 and 7.41 days obtained at 37°C and 16°C, respectively.

© Systematic & Applied Acarology Society
Fatemeh Jafarian and Shahriar Jafari "The effect of temperature on life history and demographic parameters of Eotetranychus frosti (Acari: Tetranychidae)," Systematic and Applied Acarology 21(7), 957-966, (13 June 2016).
Received: 29 October 2015; Accepted: 1 April 2016; Published: 13 June 2016
E. frosti
intrinsic rate of increase
life history
life table
survival rate
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