) HOMOPTERA: ALEYRODIDAE( )TRIALEURODES VAPORARIORUM( و گلخانه )BEMISIA TABACI( روي سفيد بالك پنبه )CHRYSOPERLA CARNEA )NEUROPTERA: CHRYSOPIDAE( مدل شكارگري بالتوري سبز

Predation Model of Chrysoperla Carnea (Neuroptera: Chrysopidae) on Bemisia tabaci and Trialeurodes Vaporariorum (Homoptera: Aleyrodidae)

A model was developed to estimate the efficiency of Chrysoperla carnea (Neuroptera: Chrysopidae) larvae on different densities of populations of Bemisia tabaci Gennadius and Trialeurodes vaporariorum Westwood (Homoptera: Aleyrodidae). The research was conducted in isolated cages in a greenhouse with 25 ± 2 °C, 75 - 85% RH, 16:8 (L: D) photoperiod on Lantana camara. Feeding rate of chrysopid larvae was estimated from the Honing type - III function. During larval development, each larva consumed a maximum of 196 aleyrodids, which is only half the potential feeding rate reported in laboratory experiments. The lower consumption rate in the greenhouse may be attributed to the additional time required by predators to find prey or handling time which increases significantly in lower density of prey. The derived functions from the model can be used to estimate the abundance of chrysopid larvae necessary to control the aleyrodids population density in greenhouse and field conditions.