Autumnal aphid fauna on maize as an indicator of environmental changes.
So far in Poland 7 aphid species developing only holocyclically have been observed on maize. Observations which were carried out in the Wielkopolska region in 2004-2012 revealed an occurrence of 5 aphid species. For the first time, in 2012, anholocyclic development of all the observed aphid species was recorded. Among them, new host races of Rhopalosiphum padi and Sipha maydis were isolated, as strict monophagous on maize. Their distinction was found in the studies conducted in environmental chamber conditions.