EN
Johnson’s suction trap located at the Institute of Plant Protection–National Research Institute in Poznan is used for aphid monitoring since 1973. Daily catches of insects allowed to keep trace of the intensity of and time each species flights. This is particularly important for precise determining threat, primarily by aphids – viruses vectors, and also for studies on changes in biodiversity of aphid fauna over the years. The aim of research was to study the structure and dynamics of the aphid fauna caught by Johnson’s suction trap in Poznan in 2008–2010. In 2008 a total of 25 950 aphids, in 2009 – 24 341, and in 2010 – 23 305 was cought. In all the years of observation the bird cherry-oat aphid (Rhopalosiphum padi L.) was the dominant species. This species share in the whole aphid population ranged from 40.2% in 2010 to 53.1% in 2009. A large number of identified aphids was represented by the following species: Drepanosiphum platanoidis (Schrk.), Drepanosiphum aceris (Koch), Hyalopterus pruni (Geoff.) Eucalipterus tiliae (L.), Myzus persicae (Sulz.), a complex of two species of Euceraphis punctipennis/betulae, and the complex of species from the genera: Anoecia spp., Aphis spp. and Adelges spp.