Plant Parasites of Europe

leafminers, galls and fungi

Phytophthora infestans

Phytophthora infestans (Montagne) de Bary, 1876

Phytophthora blight

on Solanum, etc.

Phytophthora infestans on Solanum tuberosum

Solanum tuberosum, Belgium, prov. Antwerp, Balen, Griesbroek, 23.vii.2021 © Carina Van Steenwinkel

Phytophthora infestans on Solanum tuberosum

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Phytophthora infestans on Solanum tuberosum

conidiophore (congo red staining)

Phytophthora infestans on Solanum tuberosum

conidia

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

conidiophore

Phytophthora infestans: conidiophore

detail of the terminal branching

Phytophthora infestans: conidiophore

foot of the conidiophore

Phytophthora infestans: conidia

conidia

Phytophthora infestans on Lycium barbarum

Lycium barbarum, France, dép. Nord, Grand-Fort-Philippe, 29.x.2016 © Sébastien Carbonnelle

Phytophthora infestans on Lycopersicon esculentum

Lycopersicon esculentum, Dronten, 9.viii.2010 © Arnold Grosscurt

gall

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; Schizanthus; Solanum dulcamara, melongana, nigrum, physalifolium, tuberosum.

notes

cause of the dreaded potato blight,

references

Brandenburger (1965a: 559), 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), Porta-Puglia & Mifsud (2006a).

Last modified 16.xi.2022