sourceTaxonName: Erysiphe polygoni
targetTaxonName: Beta vulgaris
localityName: United States
referenceCitation: Skoyen, I.O., Lewellen, R.T., and McFarlane, J.S.. 1975. Effect of powdery mildew on sugarbeet production in the Salinas Valley of California. Pl. Dis. Reporter 59:506-510