Paraperonospora tanaceti (Gäumann) Constantinescu, 1989

on Tanacetum

Tanacetum vulgare, Belgium, prov. Antwerp, Balen, Griesbroek © Carina Van Steenwinkel

underside of a mildly infected leaf

rarely the down is also epiphyllous

underside of a heavily infected leaf

conidiophore

detail of the ultimate branchings

conidia

gall

leaves pale, may be disfigured. Underside with an, alsmost felt-like down, consisting of 0.5 mm high erect conidiophores that apically several times are dichotomously branching, each branch ending in a conidium.

hostplants

Asteraceae, monophagous

Tanacetum corymbosum, parthenium, vulgare.

synonyms

Peronospora tanaceti Gäumann, 1923.

references

Brandenburger (1985a), Buhr (1965a), Constantinescu (1989a, 1996a), Doppelbaur, Huber & Poelt (1965a), Klenke & Scholler (2015a), Müller (2015a), Müller & Kokeš (2008a), Săvulescu (1948a).