Fpests of oil producing cabbage crops in the forest-steppe of Ukraine

Abstract

During the vegetation periods in 2007–2021 in the fields of the Educational, Research and Production Centre “Research Field” of Kharkiv National Agrarian University named after V.V. Dokuchaiev and the State Enterprise “Research Farm “Elitne” of the Institute of Plant Growing named after V.Ya. Yuriev of the National Academy of Agrarian Sciences of Ukraine we have found 54 species of specialised and multi-faceted pests of oil producing cabbage crops that belong to 8 lines and 22 families. Among them 29 species are the specialised pests and 25 are multi-faceted ones. The frequency of the pest species occurrence on the crops is the following: 8 species (14,8%) populate the crops on a mass scale, 6 species (11,1%) are moderately spread, and 40 species (74, 1%) have a low population density. The cabbage bug, mustard bug, ground cabbage aphid, rose chafer, rape blossom beetle, mesographe flea beetle, flea beetle and diamond black moth belong to the species that populate the crops on a mass scale. Among them 4 species belong to the Coleoptera line, 2 species belong to the Hemiptera line, 1 species belong to the Homoptera line and 1 species belong to the Lepidoptera line. The representatives of the Coleoptera line dominate; their proportion in the entomocomplex structure is 48% (26 species). The economic importance of these pests is not the same and greatly depends on the population density and phenophase of the crop development as well as on weather conditions.