Oat Mosaic Virus

Abstract

SUMMARY A soil‐borne virus with rod‐shaped particles (700–750 × 12 nm) was isolated from oats. It was transmitted with difficulty by sap inoculation to oats, but not to nine other species of Gramineae nor to Chenopodium amaranticolor . Two distinct strains of the virus were found; one causing chlorotic or ash‐grey eyespots with dark green centres to appear on the basal portion of the oldest leaves and the other a general mottling of the upper portion of the youngest leaves. It is concluded that the virus is similar to, and probably identical with, oat mosaic virus in the United States.