Peronospora calotheca de Bary, 1858

on Asperula, Galium

Peronospora calotheca on Galium odoratum

Galium odoratum, Hongarije, Mosonmagyaróvár, 20.iv.2019 © László Érsek

Peronospora calotheca on Galium odoratum

light infection

Peronospora calotheca on Galium odoratum

advanced infection

Peronospora calotheca on Galium odoratum

underside of an infected leaf

gall

the plants look etiolated, elongated; upper side of the leaves yellowed with a green, later black tip; at the underside a greyish fungal bloom, consisting of vertical, distally repeatedly dichotomously branched conidiophores.

host plants

Rubiaceae, oligophagous

Asperula arvensis, cynanchica, tinctoria; Galium odoratum.

references

Brandenburger (1985a), Buhr (1964b), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Göker, García-Blázquez, Voglmayr ao (2009a), Göker, Voglmayr, Riethmüller ao (2003a), Gustavsson (1991a), Hafellner (1980a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Müller (2015a), Müller & Kokeš (2008a), Negrean (1996b), Negrean, Constantinescu & Denchev (2004a), Riethmüller, Voglmayr, Göker ao (2002a), Ruszkiewicz-Michalska (2006a), Săvulescu (1948a), Voglmayr (2003a).

mod 16.i.2020