EN
Amblyseius andersoni (Chant) is a representative species of the family Phytoseiidae occurring in natural habitats in Poland. Recently it is used as a biological control agent against the twospotted spider mite (Tetranychus urticae Koch.). Only the exact knowledge of its habitat preferences provides to plan a proper ecological infrastructure on plantation, to be suitable reservoir for the predatory mites. Animal material (A. andersoni) and plant material (Urtica dioica L., Lamium album L., Geum urbanum L., Fragaria × ananassa Duch var. Honeoye) used in the experiments on predatory mites habitat preferences was selected on basis of free-year field studies (2007−2009) on strawberry plantations and their surroundings. Laboratory choice tests were conducted in 2010 in three series. A. andersoni preferences of choosing plants habitats were observed after 4 and 24 hours. Four hours after application of mites on the arena only 42% of total number of A. andersoni chose a particular plant. However after 24 hours 87% of the initial population of predatory mites chose the plant, whereas most of Phytoseiidae settled the nettle and the white deadnettle was colonized the last.