Paraperonospora leptosperma (de Bary) Constaninescu, 1989

on Asteraceae, Anthemideae

Tripleurospermum maritimum.Belgium, prov. Limbourg, Lanaken, Dal van de Grensmaas, Hochter Bampd, Herbricht, 28.v.2021 © Carina Van Steenwinkel

early infestation

detail

conidiophore

ultimate branchings

spores

spores

gall

greyish-white, sometimes yellowish fungal down on the leaves (mainly underside), sometimes the flower heads on scattered patches. It consists of erect, tree-like branching conidiophores. Infected plants turn yellow, ultimately brown.

host plants

Asteraceae, narrowly oligophagous

Achillea atrata, clusiana, millefolium, umbellata; Anthemis arvensis, cotula, cretica subsp. carpatica; Argyranthemum frutescens; Coleostephus myconis; Cota austriaca; Cotula altissima, turbinata; Crepis pulchra; Dimorphotheca pluvialis, sinuata; Lasiospermum bipinnatum, brachyglossum; Matricaria aurea, breviradiata, chamomilla, discoidea, “globifera”; Tripleurospermum caucasicum, inodorum, maritimum; Ursinia anthemoides, cakilefolia, calenduliflora, speciosa.

synonyms

Peronospora leptosperma de Bary, 1863; P. anthemidis Gäumann, 1923; P. achilleae Săvulescu & Vánky, 1956.

references

Buhr (1964b), Constantinescu (1989, 1996a), Dietrich (2013a), Doppelbaur & Doppelbaur (1973a, 1974a), Doppelbaur, Huber & Poelt (1965a), García-Blázquez, Constantinescu, Tellería & Martín (2007a), Göker, Voglmayr, Riethmüller ao (2003a), Jage, Klenke, Kruse ao (2017a), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Losa España (1944a), Mayor (1967a), Müller (2015a), Müller & Kokeš (2008a), Negrean, Constantinescu & Denchev (2004a), Riethmüller, Voglmayr, Göker ao (2002a), Săvulescu (1948a).