Ecological structure of harmful entomocomplex of agrocenoses of cereal crops of the Central ForestSteppe of Ukraine

Abstract

Species composition of harmful entomofauna in agrocoenosis of grain crops in Central Forest-steppe of Ukraine is specified. 54 species of insects-phytophages from 22 families and 8 orders are ascertained. In taxonomic structure of harmful entomocomplex representatives of such orders as Cоleoptera (18 species), Diptera (11), Hemiptera (8), Homoptera (8), Lepidoptera (5 species) dominated. The order of coleopterous (Coleoptera), which makes 33% in the structure of entomocomplex, was characterized with numerous species diversity among insects. The order of dipterous (Diptera) numbered 11 species from 5 families that made 20%. Representatives hemipterous (Hemiptera) and homopterous (Homoptera) orders were represented by the same number of species (8) that made 15% for each one in entomocomplex structure. Orders of hymenopterous (Hymenoptera), thysanopterous (Thysanoptera) and orthopterous (Orthoptera), which made jointly 8% in entomocomplex structure, were characterized with the least numerous specious diversity (1 family, 1–2 species). In wheat and barley agrocoenosis phytophils (hortobionts – 43 species from 18 families) dominated, portion of which made 79.6%. Geophils were represented with the less species diversity and numbered 11 species from 5 families among which geobionts (8 species from 3 families) dominated. The most numerous (dominant) species in 2004–2019 were such pests as corn-bug (Eurygaster integriceps Put.), turnip dart (Scotia segetum Schiff.), blue cereal leaf beetle (Oulema lichenis Voet.), cereal leaf beetle (Oulema melanopus L.), barley flea beetle (Phyllotreta vittula Redt.), click beetle (Agriotes sputator L.), fruit fly (Oscinella frit L.), striped leafhopper (Psammotettix striatus L.), green bug (Schizaphis graminum Rond.), corn sawfly (Cephus pygmaeus L.), wheat thrips (Haplothrips tritici Kurd.), which harmed greatly cereal crops.