Alternaria helianthinficiens Simmons, Walcz & Roberts, 1986
on Helianthus
parasite
Brownish black leaf spots with caespituli. Conidiophores brown, septate 5-7 x 20-100 µm. Conidia solitary brown, with long beaks, 12-18 x 60-300 µm, with 1-2 longitudinal septa.
host plants
Asteraceae, monophagous
Helianthus annuus.
references
Ondřej (1996a).