Canadian Journal of Botany - Revue Canadienne de Botanique (1992) 70, 1734-1737

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D.E. Mayhew, A.L. Cook and T.J. Gulya (1992)
Isolation and characterization of a mycovirus from Plasmopara halstedii
Canadian Journal of Botany - Revue Canadienne de Botanique 70 (9), 1734-1737
Abstract: A virus was isolated from Plasmopara halstedii, the causal agent of sunflower downy mildew. The virus contained two species of ssRNA with molecular weight (MW) of 1.05 × 106 and 0.53 × 106. One polypeptide with a MW of 37.5 × 103 was associated with whole virus. Purified preparations consisted of two components, the top component consisting primarily of empty shells. The A260/A280 UV absorbance ratio for the bottom component ranged from 1.25 to 1.35. The partially purified virions were isometric, approximately 32 nm in diameter, and had projections of approximately 4 nm on the virion surface. This virus may be related to the type A virus in Sclerophthora macrospora.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Thomas J. Gulya

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Plasmopara halstedii Sunflower (Helianthus annuus)
Plasmopara halstedii mycoviruses (antagonist) Plasmopara halstedii