Phloeospora robiniae (Libert) von Höhnel, 1905

on Robinia

Robinia pseudoacacia, Belgium, prov. Flemish Brabant, Diest, Asdonk, 1.viii.2020 © Carina Van Steenwinkel: leaf spots

malformed leaves

conidia bundle

conidia

conidia; in the present material 3-5 x 21-58 µm.

Robinia pseudoacacia, Belgium, prov. Limbourg, Heusden-Zolder, Vallei van de Mangelbeek, 22.vii.2020 © Carina Van Steenwinkel

Conidiodomata with extruded spore masses

conidia

conidia. In this material the conidia were considerably larger than stated in the literature, viz. 3-5 x 33-78 µm (1-3-septate).

parasite

Generally solitary, up to a cm size, yellowish brown leaf spots with a dark edge, occurring in early summer. Because the infection occurs quite early, young leaves and petioles may become malformed. Conidiodomata hypophyllous, ± 0,1 mm, yellowish; conidia, according to the literature, 3-5 x 25-55 µm.

host plants

Fabaceae, monophagous

Robinia pseudoacacia.

references

Brandenburger (1985a: 314), Kehr & Butin (1996a), Ruszkiewicz-Michalska (2006a).