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Occurrence of Downy Mildew on Sunflower in South Africa.
Viljoen A, van Wyk PS, Nowell DC, Gulya TJ. Viljoen A, et al. Among authors: nowell dc. Plant Dis. 1997 Jan;81(1):111. doi: 10.1094/PDIS.1997.81.1.111C. Plant Dis. 1997. PMID: 30870928 Free article.