Abstract
This research was conducted to determine the phytoseiid species on walnut trees in Samsun Province, Tur-key in 2018. Most of the surveys were done in unsprayed orchards. A total of nine phytoseiid species were collected - Euseius finlandicus, E. gallicus, E. stipulatus, Kampimodromus aberrans, Neoseiulella tiliarum, Phytoseius finitimus, Typh-lodromus (Anthoseius) rapidus, Typhlodromus (Anthoseius) sp. and Amblyseius (andersoni?) sp. Euseius finlandicus was the most abundant species, followed by Phytoseius finitimus. Mite density was twice as high on the lower surface as on the upper surface of leaves. These nine species represent a substantial local genetic resource with the potential to improve the efficacy of biological control programs.