Occurrence of sawflies (Hymenoptera, Symphyta) in fields of winter wheat and spring barley.
The occurrence of Symphyta in fields of winter wheat and spring barley was investigated in a region of eastern-central Poland in 1979-82. A total of 1641 adults and 10 189 larvae was caught by sweep-netting in stands of wheat, and 821 adults and 13 463 larvae in stands of barley. The families recorded were Tenthredinidae (40 species, the dominant ones belonging to the genera Dolerus, Athalia, Ametastegia and Pachynematus), Cephidae (1 species, Cephus pygmeus) and Argidae (2 species). The larvae collected belonged to the subfamilies Selandriinae, Dolerinae, Blennocampinae and Nematinae. The abundance, food plants and seasonal dynamics of adults and larvae are discussed.