دراسة جداول الحياة لحشرة دودة ثمار التفاح .L pomonella Cydia عند درجات حرارة ثابتة و مختلفة مختبريا

Abstract EN

A study was conducted in the Lattakia Center for Rearing and Application of Natural Enemies during 2014-2016.

The life table of Cydia pomonella L.

was studied at five constant temperatures (15, 20, 25, 30, 35 ˚C), under laboratory conditions on artificial diet.

The results indicated that the survival curve lx showed steady increase, whereas life expectancy ex showed steady decline with advancing age.

Generation time GT for female was 137.6, 74.49, 48.75, 35.34, 27.84 days, for the five temperatures regimes, respectively.

Results also showed that the net reproduction rate (R0) decreased at lower and higher temperatures and was optimal at 25 ˚C, and the values of R0 was 3.33, 14.3, 23.3, 6.85, 0.87 female/female/generation, for the above five temperatures, respectively.

The Population doubling time (DT) was 35.89, 8.32, 3.34, 8.24, 51.07 days, for the five temperatures, respectively.

The intrinsic rate of increase (rm) was 0.019, 0.08, 0.21, 0.08, 0.01 female/day, respectively.

The study revealed that among the five different constant temperatures used, 25°C was the most suitable for the development of C.

pomonella.

This is useful information for predicting pest dynamics and seasonal variations of the pest and making pest control decisions based on economic feasibility