Corylus
Corylus is a genus of deciduous shrubs and small trees in the birch family Betulaceae, native to temperate regions of the Northern Hemisphere. The genus comprises about 15 species, with Corylus avellana (the common hazel) and Corylus colurna (Turkish hazel) among the best known for nut production. Hazelnuts, or filberts, have been cultivated for centuries for eating, oil, and culinary uses, and the plants are also valued as ornamental hedges and in agroforestry systems.
Description: Corylus species are typically multi-stemmed in form, with rounded to upright crowns. Leaves are alternately
Major species and distribution: The most widely grown is Corylus avellana, native to Europe and western Asia.
Cultivation and uses: Corylus nut crops are cultivated commercially in temperate regions for fresh and processed
Pests and diseases: Hazelnuts are subject to pests and diseases including eastern filbert blight (Anisogramma anamola),