I. NIKOLOVA, N. GEORGIEVA
Abstract: During 2007-2010period was studied the quantitative and qualitative composition of species of Heteroptera order in winter vetch agrocenosis in Pleven region, as and the population dynamics of economically the most important species of them in order to proper determine the timing and means of control. Fauna of Heteroptera in winter vetch stands was represented by 8 families, 18 genera and 19 species.As dominant pests from family Pentatomidae outlinedPiezodorus lituratus (28.0% of total number),from family Miridae – Lygus rugulipennis (24.6%), Adelphocoris lineolatus (10.3%) and from family Coreidae – Ceraleptus gracilicornis (9.1%). Useful insects werethe speciesfrom family Nabidae – genus Nabis (5.7%) and from family Anthocoridae – Orius niger (11.1%). The participation ofHeteroptera order inwinter vetch agrocenosis was greatest at the stage of pod formation in the second and third decade of June and in the beginningof July. At this period, in case of need, it should be carried out chemical control. It should be planed 15-20 days before appearance of the imago. The population dynamics of useful species from genus Nabis and Orius niger followedor correspondedwith that of harmful bugs that underlined their important role as bio-agents.
Key word:Viciavillosa, Heteroptera order