Plant Parasites of Europe

leafminers, galls and fungi

gallers on Hydrocotyle

Dichotomous table for gallers on Hydrocotyle vulgaris

by Hans Roskam

1a Leaf blade curled and distorted => 2

1b Leaves with multicellular warts, depressed at the tip ± golden-yellow, later on browned, hardly 1 mm long. Often many on leaf underside, also coalescing into long ridges or crusts, also on petioles and tillers. Synchytrium aureum

2a Weak wrinkling or curling of leaf blade caused by aphids on underside. Aulacorthum solani

2b Leaf blade strongly deflected downwards, curled and dark-green close to the froth-covered nymph. Philaenus spumarius

2c More or less conspicuous, sometimes distorted locally bulge-like swellings on stems or slight archings on leaves, with loosely arranged aecia and spermogonia. Uromyces lineolatus

Last modified 6.vii.2020