Functional response of Euseius mesembrinus (Dean) as a function of the density of Brevipalpus californicus (Banks) (Acari: Phytoseiidae, Tenuipalpidae).
The functional response of Euseius mesembrinus with larvae and adult females of Brevipalpus californicus as prey, was type II, using the leaf arena technique. The instantaneous rate of discovery and the handling time were determined. The highest value for the rate of discovery and the lowest for handling time were obtained when feeding on females. The value of rate of discovery (1.5240) using the model of Rogers was double that calculated using Holling's model (0.7842) when feeding on larvae. The highest handling time (larvae as prey) was estimated using to Livdah and Stiven's model (0.0128).