EN
The aim of the present research carried out in the vicinity of Bydgoszcz city (Kujawsko-Pomorskie) was to investigate whether the farming system affects the qualitative and quantitative composition of Coccinellidae predators. The catches made with sweep nets were performed starting from the first decade of May to the second decade of July, in 2008–2009, on winter triticale plantations in two farming systems: organic and traditional. Throughout the two-year research period 235 predator ladybird beetles were caught, representing 9 species. The calculated lower mean values of Simpson index and higher values of the Shannon-Wiener index, indicated a greater species variation within Coccinellidae on the organic farm comparing to the traditional farm.