Ascochyta dahliicola (Brunaud) Petrak, 1937

on Dahlia

parasite

Causes up to 1 cm large brown leaf spots, developing from the leaf margin. Pycnidia black, deeply immersed. Conidia 2-5 x 6 µm, 1-septate, biguttulate.

host plants

Asteraceae, monophagous

Dahlia coccinea, merckii, pinnata.

synonyms

Phyllosticta dahliicola, dahliaecola Brunaud, 1887.

references

Brandenburger (1965a: 624), Cejp (1965a), Ellis & Ellis (1997a), Grove (1935a).