EN
During vegetative season, cereal leaves are often damaged by larvae of flies from the family Agromyzidae – a casual agent of characteristic symptoms of feeding – mines. Leaf miner larvae cause the reduction of surface parenchyma of leaves (flag and second). This usually leads to photosynthesis disruption and consequently to a lowered number of grain in ears, and thousand grain weight reduction. The damage caused by leaf miners mainly depends on the intensity of pests infestation. Climate warming, simplification of agricultural techniques, crops growing on large areas (are the factors favouring the development of pest populations). The research was conducted on the field of the winter wheat crops at two locations of Wielkopolska district in vegetation seasons 2008/2009 and 2009/2010. The aim of research was to determine the number of stalks with damages leaves and identify mines. Leaves with visible larvae or pupae were collected on the selected field of winter wheat in May. The aim study was to rear flies in the laboratory in order to determine the species composition. The leaf mining species occurring on winter wheat planations during the years of the research were Chromatomyia fuscula, Ch. nigra and Poemyza superciliosa. Based on the research and literature data, the species composition of Agromyzidae damaging winter wheat in particular years varies.