Surrounding Semi-Natural Vegetation as a Source of Aphidophagous Syrphids (Diptera, Syrphidae) for Aphid Control in Apple Orchards

The influence of different semi-natural surroundings adjacent to apple orchards on the occurrence predatory syrphids and biological control Aphis pomi Deg. Dysaphis plantaginea Pass. was compared. Two methods catching hoverflies were used: yellow traps collect adults hand picking get larvae from aphid colonies. A total 1029 Syrphidae (26 species belonging 14 genera) subfamily Syrphinae collected in Moericke their boundaries. At all sites, a much greater number (638 specimens) than (391 specimens). In orchards, 134 10 reared A. D. both cases, dominants Episyrphus balteatus (Deg.) Eupeodes corollae (Fabr.), Syrphus vitripennis Meig. S. scripta (L.), suggesting that are attracted by plants flowering habitats vicinity orchard, they then migrate orchard reduce results confirmed positive natural conservation predators.