Six-year Malaise trapping of the leaf miner Chromatomyia fuscula (Diptera: Agromyzidae) and its chalcidoid parasitoid complex in a barley field and its boundary

The fly Chromatomyia fuscula and its most important parasitoids were studied. Each year, one Malaise trap was placed in the spring barley part of the field, and another along the nearest wooded boundary for the whole season. Few C. fuscula were trapped in the boundary, suggesting that at least the lower vegetation strata were unimportant for the overwintering fly. The parasitoid complex was remarkably stable over years, and 13-15 of the species were found each year (habitats combined. Only 4 species attained fractions higher than 10 % of the total annual catches in both habitats the larval parasitoids Diglyphus begini and Hemiptarsenus unguicellus and the pupal parasitoids Cyrtogaster vulgaris and Chrysocharis pubiconis. In the boundary, C. vulgaris dominated every year (43-83 %).