Atlihan, RemziKaydan, M. BoraYarimbatman, AlperOkut, Hayrettin2025-05-102025-05-1020100334-21231876-718410.1007/s12600-009-0075-y2-s2.0-76449121250https://doi.org/10.1007/s12600-009-0075-yhttps://hdl.handle.net/20.500.14720/1790Kaydan, Mehmet Bora/0000-0002-0677-255XThe functional response types and parameters of 3rd and 4th instar larvae, and adult females and males of a coccinellid predator, Adalia fasciatopunctata revelierei (Mulsant) (Col.: Coccinellidae), were evaluated at five different densities of Callaphis juglandis (Goeze) (Hemiptera: Aphididae) in order to understand their role for the aphid's biological control. Experiments were carried out in petri dishes at 25 +/- 1 degrees C, 60 +/- 10% r. h. and 16L:8D photoperiod in a controlled temperature room. All tested stages exhibited a Type II response determined by a logistic regression model. The attack rate (alpha) and handling time (T-h) coefficients of a Type II response were estimated by fitting a "random-predator" equation to the data. Although the estimates of alpha for all stages of A. fasciatopunctata revelierei tested were similar, the longest T-h was obtained for 3rd instar larva because of the lower consumption rate at densities above 40 prey/day. Results indicated that the adult female has the highest predation of C. juglandis followed by 4th instar larvae, adult males and 3rd instar larvae. However, further field-based studies are needed to draw firm conclusions.eninfo:eu-repo/semantics/closedAccessBiocontrolPest ControlPredationPredator-Prey SystemsArticle381Q2Q22329WOS:000276123900004