Apple Mosaic Virus in U.S. Filbert Germ Plasm. J. D. Postman, Plant Pathologist, National Clonal Germplasm Repository, 33447 Peoria Rd., Corvallis, OR 97333. H. R. Cameron, Professor of Botany and Plant Pathology, Oregon State University, Corvallis 97331. Plant Dis. 71:944-945. Accepted for publication 15 June 1987. Copyright 1987 The American Phytopathological Society. DOI: 10.1094/PD-71-0944.

Apple mosaic virus (ApMV) has been reported to cause a mosaic disease of filberts (Corylus avellana). In this study, seven ApMV-infected filbert cultivars were detected by enzyme-linked immunosorbent assay (ELISA) in the U.S. filbert germ plasm collection at Corvallis, OR. All plants tested negative by ELISA for prunus necrotic ringspot virus. ApMV-infected trees may be symptomless or may exhibit chlorotic ringspots and line patterns. This is the only virus disease of filberts reported in the United States.