Plant Parasites of Europe

leafminers, galls and fungi

Phytophthora infestans

Phytophthora infestans (Montagne) de Bary, 1876

on Solanaceae

Phytophthora infestans on Lycopersicon esculentum

Lycopersicon esculentum, Belgium, prov. Antwerp, Mol, 15.viii.2018 © Carina Van Steenwinkel

Phytophthora infestans: conidiophore with conidia

conidiophore with conidia

Phytophthora infestans: conidiophore


Phytophthora infestans: conidiophore

detail of the terminal branching

Phytophthora infestans: conidiophore

foot of the conidiophore

Phytophthora infestans: conidia


Phytophthora infestans on Lycium barbarum

Lycium barbarum, France, dép. Nord, Grand-Fort-Philippe © Sébastien Carbonnelle

Phytophthora infestans on Lycopersicon esculentum

Lycopersicon esculentum, Dronten © Arnold Grosscurt


white, velvet cover on all parts of the plant, even underground. Attacked parts turn brown and wither. The conidia (in fact, sporangia) are ovoid or lemon-shaped, with an indistinct apical papilla. They are formed at the tip of seemingly undifferentiated hyphae, that here and there show irregular swellings.

host plants

Solanaceae, oligophagous

Lycium barbarum; Lycopersicon esculentum; Petunia x hybrida; Solanum dulcamara, melongana, nigrum, physalifolium, tuberosum.


cause of the dreaded potato blight,


Brandenburger (1965a), Derevnina, Petre, Kellner ao (2016a), Göker, Voglmayr, Riethmüller, Weiß & Oberwinkler (2003a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2019a), Mułenko, Piątek, Wołczańska ao (2010a).

Last modified 1.ix.2019