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- Title
THE DISTRIBUTION OF SUGAR BEET YELLOWING VIRUSES IN EAST ANGLIA IN 1960.
- Authors
Russell, G. E.
- Abstract
This article deals with the survey conducted on the prevalence of beet yellows virus (SBYV) and sugar beet mild yellowing virus (SBMYV) in East Anglia, England from July-August 1960. Both SBYV and SBMYV are persistent or semi-persistent viruses and 24 hour test and infection feeding times were used to transmit both viruses. There is apparently complete cross-protection between different strains of SBYV and no protection at all between SBYV and SBMYV, and these tests were made to confirm that seedlings which showed yellowing only were not infected with an avirulent strain of SBYV. The older leaves of plants infected with SBYV are usually pale yellow with very small red, brown or black necrotic spots, particularly near the tips of the lamina. If the number of sampled plants estimated to be infected with SBMYV in addition to SBYV is taken into account, the proportions of SBMYV to SBYV in all areas are increased considerably. In the transmission tests, beet seedlings showing yellowing symptoms only, when cross-inoculated with a virulent strain of SBYV, invariably showed symptoms of the virulent SBYV strain as rapidly as did healthy plants inoculated at the same time.
- Subjects
EAST Anglia (England); ENGLAND; AGRICULTURAL surveys; PLANT epidemiology; BEET yellows virus; PLANT diseases; SUGAR beets
- Publication
Plant Pathology, 1962, Vol 11, Issue 1, p14
- ISSN
0032-0862
- Publication type
Article
- DOI
10.1111/j.1365-3059.1962.tb00151.x