The aphid fauna obtaiend from hazelnut shrubs consisted of 7 species, dominated by the filbert aphid Myzocallis coryli Goetze. The hazelnut aphid (Corylobium avellanae Schrk.) appeared in small counts during the second year of the study. The other species of identified aphids were winged forms, which appeared incidentaly on the monitored hazelnut trees. The highest number of the filbert aphid was observed in the third decade of June. Individuals belonging to this taxon did not pose a severe threat to the population of hazelnut shrubs. The individuals of this aphid species obviously preferred hazelnut trees of the cultivar Halle. The study also revealed that the assemblage of phytophagous insect populating the analzyed plantation was not stable and needed to be monitored.
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