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Sclerotinia sclerotiorum is the causal agent of Sclerotinia stem rot on peanut (groundnut) in South Africa
Bornman, Simoné; Thomas, Chanel; Ntladi, Solomon; Wilken, Pieter Markus
Sclerotinia stem rot on South African groundnut was previously attributed to Sclerotinia minor, but recent infections
prompted a re-evaluation. Isolates underwent a species-specific PCR and phylogenetic analysis, confirming them as S.
sclerotiorum. Koch’s postulates were fulfilled, demonstrating pathogenicity. Inoculation caused disease symptoms, with
subsequent re-isolation matching the original strains. This study identifies S. sclerotiorum as the causative agent of Sclerotinia stem rot on groundnut in South Africa.