This article deals with the results of study of species content and basic peculiarities of beaked mites-Phytoseiidae in plant associations of one of the regional centers of Ukraine. The species composition and distribution of mites-Phytoseiidae (Parasitiformes, Phytoseiidae) in plantations of Brovary town of Kyiv region were determined. Fourteen species of 8 genera of phytoseiid mites were found. Index of their existing and relative biotope connection of each registered species to vegetation types and plant species were computed. The study was conducted according to the results of material treatment on the territory of the mentioned city from 25 species of plants (16 species of hardy-shrub and 9 of herbaceous vegetations). The studies of distribution of plant-living mites-Phytoseiidae were conducted separately for hardy-shrub and herbaceous plants). The collection of faunistic material was executed during the vegetation of periods of 2011 and 2013. Within the city the collection of the material was conducted with hardy-shrub plants and herbaceous type of vegetation along the streets, in parks and squares of Brovary city of Kyiv region, district center, one of the satellite-cities of Kiev, the capital of Ukraine. The study of species complexes characteristics of mites was conducted with usage of data calculated on the basis of frequency index (Is), degree of relative habitat confinedness (F) (Pesenko, 1982) and domination index Paliy-Kovnatski (Di) (Shitikov, 2003). Only on one species of plant (F=1) 6 species of mites-Phytoseiidae were found – T.сotoneastri on blue spruce, T. laurae – on common spruce, T. aceri – on ash-leaved maple, P. incognitus – on dog-rose, P. soleiger – on mulberry-tree, A. caudiglans – on sea-buckthorn. These species can be related to stenoecic. The mentioned species are stenotopic only in relation to the sample of plants from the plant associations of Brovary, as in other regions these species of mites can populate the other species of plants. The rest 8 species, being registered on two or more types of plants, are related to euryoecic. Among them there is a group of 6 species with “positive tendencies to population of plants”, owning the indicators of habitat confinedness 0<F<1: A. andersoni (0,92–0,96), A. rademacheri (0,85–0,96), N. herbarius (0,92–0,96), T. tiliarum (0,66–0,77), A. pirianykae (0,73–0,99), A. clavata (0,82–0,98). The rest species, E. finlandicus и K. aberrans, have the expanded range of indicators in relation to habitat confinedness (-0,71<F<0,55 и -0,16<F<0,88), that specifies on their ability to populate the big quality of species. E. finlandicus has the negative indicator of relative habitat confinedness in relation to the plants of herbaceous morphotype that serves confirmation of the ecological peculiarity of the species detected earlier. The data of relative habitat confinedness of mites to certain species of plants shows availability of stenoecic (T.сotoneastri, T. laurae, T. aceri, P. incognitus, P. soleiger, A. caudiglans) and euryoecic species (A. andersoni, A. rademacheri, N. herbarius, E. finlandicus, K. aberrans, T. tiliarum, A. pirianykae, A. clavata).

In the Ukrainian Entomological society, there is a department that does not study insects. Its members are interested in the insects’ distant relatives, the subphylum Chelicerata, which though less diverse than insects, play a significant role in the economies of nature and humankind. A special place belongs to mites, which are a subject of acarological research. In fact, the economical factors caused this direction of research to develop into a full-fledged science, kindred to parasitology, entomology, epidemiology and other sciences. Contemporary acarology has its own objects and methods of research. It started developing at the territory of today Ukraine as early as in XIX century by efforts of scientists of neighbor countries. At the turn of the XX century, first publications appeared of bloodsucking ticks parasitizing cattle and carrying pathogens, and of plant pests. In 1918–1919, when All-Ukrainian Academy of Sciences (AUAS) was established, the faunal studies and applied research progressed too. In 1930, the Institute of zoology and biology of AUAS was established and consolidated the efforts of Ukrainian specialists aimed at studying ixodid ticks, which remained in the focus of parasitological studies in 1942–1943, when the Institute was in evacuation in Bashkiria. There, the employees of the Institute studied the transmission of encephalomyelitis of horses by ticks. After the return to Kyiv the Institute continued these studies, resulting in a volume of the edition “Fauna of Ukraine”, on ixodid ticks. In 1968, the first in Ukraine laboratory of acarology was established in the Institute, which in ten years has become a department of acarology, and a center of acarological research. In 1970, the specialists of that laboratory together with representatives of other specialized institutions (from several universities, and from Nikitsky Botanical Garden, Yalta and Odesa cities, and Zakarpattia) organized the Second All-Union Acarological Conference. The Conference shaped the further development of acarological studies, mostly focusing on the applied research of economically important taxa. The acarologists were successful in expeditions, taking samples for collections, the laboratory and industrial cultures of economically important species. Especially significant results were achieved using complex methods. Thus, in Kyiv the research touched upon the spider mites and their acarophagous enemies, utilized in a biological method of pest control, and also on storage mite pests, on predator and parasitic cheyletids, on oribatids, and free-living and parasitic gamasid mites and ixodid ticks, on the bee parasites of the genus Varroa, etc. In the Nikitsky Botanical Garden, complex research was conducted on the plant pest mites. Interesting studies were done in the universities and scientific institutions of Odesa, Lviv, Uzhorod, Donetsk, etc. All of that resulted in the increase of knowledge (published in monographs, papers and designs), and in the growing expertise of the specialists (more than 50 Candidates and Doctors of Science). Results of these works were highly appreciated by the community and given the recognition of the State Award.