Coccids distribution and food chains on ornamental cultures in the Nikitsky Botanical Gardens

The entomological inventory survey results of super-family Coccoidea in four Arboretum parks - Upper, Lower, Coastal and Montedor - are presented, the predominate species, the distributional pattern and food chains have been found. Four basic coccid groups have been specified according to the pattern of distribution on plants and the food chains. The coccid species composition in the Arboretum is presented by 19 phytophagan species out of 6 families. In all the parks the representatives of the family Coccidae dominate outman and injuriousness. Two coccid species Parthenolecanium corni Bouché. and Parthenolecanium pomeranicum Kaw. are the new ones for the coccid fauna of the Nikitsky Botanical Gardens. The coccid fauna and its food chains were studied present with the decorative cultivars guided by visual analysis of leaves, tree trunks and boughs. The determined coccids coupled with a part of a forage plant were looked through by means the binocular. The trivial belonging was defined according to N.S. Borhsenius method [1]. The distribution and forage plants occupancy rating was determined by 4 - scorecard scale: 0 ̶ crop pest is not detected; 1 ̶ sporadical plant invasion; 2 ̶ is present often but in small amounts; 3 ̶ mass plants occupancy [4]. The elicited coccid species were divided into polyphagans (P), monophagans (M) and oligophagans (O). As the result of entomological coccid fauna inventory survey in the Arboretum of the Nikitsky Botanical Gardens 19 species, which are of six families, were found. Families Diaspididae and Coccidae are the most numerous. The richest species diversity appears in Lower Arboretum park. According to food chains character 8 monophagans, 1 oligophagan and 10 polyphagans have been found. According to the coccid distribution on plants there are 4 groups: the first group includes coccids, which are inhabitants of evergreen shrubbery; the second one occupies leaves and young off-shoots; the third one settles by colonies on tree trunks, skeletal boughs or by rogue specimens; the fourth coccid group is confined to roots. Two new coccid species - Parthenolecanium pomeranicum Kaw. ̶ on common yew and Parthenolecanium corni Bouché. ̶ on high cranberry in the territory of the Arboretum have been found.

кокциды, фауна, трофические связи, декоративные культуры, парковый ценоз, coccids, fauna, ornamental cultivars, park coenosis, food chains