Entomologia Hellenica 20 (2011): 3-16.

Department of Entomology, Faculty of Agriculture, Tarbiat Modares University, P.O. Box 14115–336, Tehran, Iran,Benaki Phytopathological Institute, Department of Entomology, St. Delta 8, 145 61, Kifissia, Greece

Developmental rate of immature stages and age-specific fertility of females of codling moth at constant temperatures was modeled using non-linear models. The equations of Enkegaard, Analytis, and Bieri 1 and 2 were evaluated based on the value of adjusted R² (R²adj) and Akaike information criterion (AIC) besides coefficient of determination (R²) and residual sum of squares (RSS). All models have goodness of fit to data especially for development [R², R²adj, RSS and AIC ranged 0.9673-0.9917, 0.8601-0.9861, 0.08-6.7x10-4 and (-75.29) – (-46.26) respectively]. Optimum temperature (T_opt) and upper threshold (T_max) were calculated accurately (T_opt and T_max ranged 29.9-31.2^oC and 35.9-36.7^oC) by all models. Lower temperature threshold (T_min) was calculated accurately by Bieri-1 model (9,9-10,8^oC) whereas Analytis model (7,0-8,4^oC) underestimated it. As far as fertility is concerned the respective values were better fitted near the optimum temperature (in 30^oC) [R² ,R²adj, RSS and AIC ranged 0,6966-0,7744, 0,5756-0,6455, 2,44-3,33 x10-4 and (-9,15)-7,15 respectively].