Golovinomyces spadiceus (Berkeley & Curtis) Braun, 2012

on Asteraceae

gall

mycelium amphigenous, also on the stems, with spots that eventually coalesce. Appressoria nipple-shaped, not paired, sometimes several on a single cell. Cleistothecia with 8-15 asci, containing 2, rarely 3, spores. Appendages numerous, sub-equatorial, 0.2-1.5 x the diameter; they are mycelioid, generally unbranched, septate, hyaline at first, eventually brown.

host plants

Asteraceae – Heliantheae, oligophagous

Acanthospermum hispidum; Coreopsis grandiflora, tinctoria, verticillata; Dahlia x hortensis, pinnata; Melampodium; Parthenium hysterophorus; Tithonia; Xanthium orientale & subsp. italicum, spinosum, strumarium & subsp. brasilicum; Zinnia elegans, haageana, violacea.

Outside of Europa also reported from a large number of other, unrelated species like Aconogonon alpinum

references

Abasova, Aghayeva & Takamatsu (2017a), Braun & Cook (2012), Braun, Shin, Takamatsu ao (2019a), Bresinsky (2016a), Klenke & Scholler (2015a), Kruse (2014a).

mod 13.iii.2019