مقايسه برخي پارامترهاي جمعيتي در اكوتيپ هاي مختلف زنبور

Comparison of some population parameters in different ecotypes of Trichogra»una brassicae Bezd. (Hym., Trichogrammatidae)

The Trichogramma wasps have been successfully applied to control of several pests worldwide. In Iran the dominant Trichogramma species is T. brassicae. Age specific life tables of different ecotypes of the wasps which collected from different areas of Mazandaran province showed some differences among the population parameters in 25±1 ;C, 60±5% R.H. and 16 h light photoperiod condition. The intrinsic rate of increase(rm) was the lowest for Tazeh Abad Chalus(Ta) ecotype with 0.21 and the highest one for Ramsar(Ra) and Semeskandeh-Sari(Sd) ecotypes with 0.294. Doubling time(DT) were 3.3 days for Ta and 2.35 days for Ra and Sd ecotypes. The results showed that Ra and Sd ecotypes had better biological attributes than others and were superior ecotypes.