تأثير كثافة مَن اللهانة Brevicoryne brassicae (L.)‎ في الاستجابة العددية للمفترس Chrysoperla carnea (Stephens)‎

Abstract EN

This study was conducted to evaluate different prey densities of cabbage aphid Brevicoryne brassicae (L.) supplied during larval stage on the survival rate and development of larval instars of the predator Chrysoperla carnea (Stephens), and its effect on the numerical response of the predator through fecundity and longevity of adults.

Results showed that predator’s larvae had a distinct ability to survive under inadequate feeding conditions.

Increasing the amount of food consumption of the larval stage had a positive impact on the survival rate of larval instars, accelerated development and longevity of adults with a high sex ratio in favor of females as well as increasing oviposition period, fecundity and decreasing both of preoviposition and postoviposition periods.