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Ramularia beticola (beet leaf spot )
Ramularia beticola
beet leaf spot
Ramularia betae
Asia: Japan; Europe: Belgium, Czechia, Denmark, France.
Not known to be in the US
2025-12-22
fungus
China
Sugarbeet
RAMUBE
Ramularia beticola is primarily a sugar beet pathogen, and its relevance in other beet types has largely been inferred from sugar beet systems. Symptoms are easily confused with those of Cercospora beticola, making field diagnosis difficult. Although sometimes suggested as seedborne in sugar beet, there is no well-documented evidence of true seed transmission, and disease spread is mainly attributed to infected crop residues and wind- or rain-dispersed spores.
Crops
Beta vulgaris
table beet, swiss chard
No
RAMUBE-2, RAMUBE-4
In table beet, Ramularia beticola spreads primarily via wind- and rain-dispersed spores from infected leaves and survives in crop debris; residue management is the main control. While seedborne transmission has been inferred from sugar beet, there is no evidence that table beet seed serves as a pathway.
Yes
PCR
This method has not been validated or standardized.
Chemical, cultural
Control of Ramularia beticola in table beet relies on crop rotation, removal or burial of infected residues, good field hygiene, and, if needed, fungicide applications.
2025-12-22 19:28:58
RAMUBE-2
Koike, S.T., Gladders, P. and Paulus, A., 2006. Vegetable diseases: A colour handbook. CRC Press. New York
RAMUBE-4
Ricardson, 1990. An Annotated List of Seed-borne Disease. International Seed Testing Association, Zurich, Switzerland
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