Peronospora schachtii Fuckel, 1880

on Beta

gall

underside of especially the lower the leaves with a greyish purple fungal down consisting of vertical conidiophores that apically several times are dichotomously branching, each branch ending upon an elliptic, olivaceous brown conidium. Young leaves of intected plants often are reddened, thickened en disfigured.

hostplants

Amaranthaceae, monophagous

Beta vulgaris & subsp. maritima.

synonms

P. schachtii is considered a synonym of P. farinosa by the Index Fungorum (2016). The species is sometimes addressed as P. farinosa f.sp. betae in the literature.

references

Brandenburger (1985a: 118), Buhr (1964a), Cunnington (2008a), Dauphin & Aniotsbehere (1997a), Gustavsson (1991a), Jage, Klenke, Kruse ao (2017a), Kim, Choi & Shin (2010a), Klenke & Scholler (2015a), Müller (2015a), Müller & Kokeš (2008a), Mułenko, Piątek, Wołczańska ao (2010a), Săvulescu (1948a).

mod 2.ix.2018