DOI: https://doi.org/10.2478/v10058-010-0010-1
Evidences of more than 30 years (1975–2007) existence of the northern isolated population Forest-Steppe of Ukraine (near Kozyn Village, Obukhiv District, Kyiv Oblast, Ukraine) is given. It is considered as an example of unpremeditated introduction of a beneficial predating mite together with transported plants. This is the first registered and investigated case of invasion, acclimatization and inclusion biocoenosis as an equal right member for mites of the family Phytoseiidae.