In collaboration with Iranian Phytopathological Society

Document Type : Agricultural Entomology

Authors

1 Iranian Research Institute of Plant Protection Department of Agricultural Entomology Research

2 Associate Prof, Department of Plant Protection Faculty of Agriculture, University of Maragheh,Maraghe.Iran

3 Professor, Agricultural Entomology Research Department, Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO)

4 Associate Professor, Agricultural Entomology Research Department, Iranian Research Institute of Plant Protection, Agricultural Research, Education and Extension Organization (AREEO), Tehran

10.22092/jaep.2022.358649.1435

Abstract

Olive fruit fly Bactrocera oleae (Rossi) (Dip.: Tephritidae), is the main and considerable damaging pest on olive trees (Olea europaea, Oleaceae) and causes huge economic losses. In this study, the effect of temperature on developmental rate of the Olive fruit fly was studied at 7 constant temperatures,10, 15, 20, 24, 28, 32, and 35 °C, 60-70% RH, and a photoperiod of (L:D) 16:8h. 26 nonlinear models were evaluated to determine development rate of olive fruit flies at different temperatures and to estimate the thermal developmental thresholds.Among evaluated nonlinear models, Lactin-2 and Briere-2 were the best fitting models for all immature stages considering the statistical criteria and biological significance of the estimations. Accordingly, the lower temperature threshold values (T0) estimated using Briere-2 model for incubation period, egg+ larval period, pupal period and the total period of immature stages, 5- 5.001, 5- 9.16, 7.19- 9.76, and 7.69- 8.68 °C respectively. In addition, the values of the upper temperature threshold (TU) for the mentioned developmental stages estimated 32- 43.42, 32.04- 36.23, 32.03- 36.42, and 34.03- 34.4 °C, respectively. Furthermore, estimated values for the optimal temperature (Topt) for the same mentioned developmental stages were 27.99- 30.09, 24.43- 28.04, 25.82- 30.32, and 25.94- 26.86 °C, respectively. Finally the values of lethal temperature threshold (Tl) for the mentioned developmental stages by using Lactin-2 model estimated as 34.31- 43.8, 37.44- 39.53, 33.67- 45, and 37.93- 40.13°C, respectively. The findings of the present study are useful for predicting the population dynamics of olive fruit flies and can be effective in developing optimal management strategies of B. oleae.

Keywords