The occurrence and effects of red clover necrotic mosaic virus in red clover (Trifolium pratense)

A - Papers appearing in refereed journals

Bowen, R. and Plumb, R. T. 1979. The occurrence and effects of red clover necrotic mosaic virus in red clover (Trifolium pratense). Annals of Applied Biology - AAB. 91 (2), pp. 227-&.

AuthorsBowen, R. and Plumb, R. T.

In 1976, red clover necrotic mosaic virus (RCNMV) was identified in red clover variety trials at the Scottish Colleges of Agriculture and at the trial centres of the National Institute of Agricultural Botany (NIAB) in Northumberland, Dyfed, Devon and Cambridge. In 1977, RCNMV was also found in two commercial crops of red clover in South Wales. The only previous finding of this virus in Britain was in 1971.

In red clover leaves RCNMV causes veinal chlorosis, often followed by severe necrosis and deformation; the plants become stunted. All cultivars tested were infected either in field or glasshouse experiments and three of the four most susceptible cultivars were tetraploids. Yield losses in cv. Hungaropoly averaged 57% over three cuts. RCNMV was transmitted manually but not through seed or by aphids {Acyrthosiphon pisum and Myzus persicae) or weevils (Apion spp. and Sitona lineatus). Seedlings became infected when grown in pots containing RCNMV‐infected plants or soil from infected sites, and the roots of infected test seedlings contained an Olpidium sp. which may be the vector.

White clover mosaic virus (WCMV), also common in red clover at some sites, was less damaging than RCNMV and in a glasshouse experiment decreased yield by only 22%. An unidentified seed‐borne virus with spherical particles c. 33 nm in diameter was the only virus detected in clover seedlings screened for RCNMV.

Year of Publication1979
JournalAnnals of Applied Biology - AAB
Journal citation91 (2), pp. 227-&
Digital Object Identifier (DOI)doi:10.1111/j.1744-7348.1979.tb06494.x
Open accessPublished as non-open access
Output statusPublished
Publication dates
Print01 Mar 1979
Online26 Feb 2008
Publication process dates
Accepted23 Oct 1979
Copyright licensePublisher copyright

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