Plant Parasites of Europe

leafminers, galls and fungi

appressorium

(pl appresoria). Nipple- or, sometimes lobed, discoid appendages of the hyphae of the powdery mildews (Erysiphaceae), with which they are attached to the epidermis of the host plant.

Erysiphe deutizae: appressoriumErysiphe deutizae: appressorium

Erysiphe deutziae