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Storage of Preparations of Barley Yellow Dwarf Virus. W. F. Rochow, Research Plant Pathologist, Agricultural Research Service, U.S. Department of Agriculture (ARS, USDA) and Professor of Plant Pathology, Cornell University, Ithaca, New York 14853; J. W. Blizzard(2), Irmgard Muller(3), and H. E. Waterworth(4). (2)Former Research Technician, American Type Culture Collection, 12301 Parklawn Drive, Rockville, Maryland 20852; (3)Research Technician, Cornell University, Plant Introduction Station, Glenn Dale, Maryland 20769; and (4)Research Plant Pathologist, Plant Introduction Station, Glenn Dale, Maryland 20769. Phytopathology 66:534-536. Accepted for publication 28 October 1975. DOI: 10.1094/Phyto-66-534.

No loss of infectivity of two barley yellow dwarf virus isolates was detected during 4 years' storage of virus concentrates under a range of conditions. Treatments included preservation by freezing in liquid nitrogen or lyophilization together with storage at 4, 70, or 196 C. Results show that preserved virus collections need not be restricted to plant viruses that are sap-transmissible.

Additional keywords: aphid transmission of viruses, Rhopalosiphum padi, Macrosiphum avenae, American Type Culture Collection.