Plant Parasites of Europe

leafminers, galls and fungi

gallers on Aposeris

Dichotomous table for gallers on Aposeris foetida

by Hans Roskam

1a Malformations on the plant surface not occupied by fungi => 2

1b Leaf blade on the underside with round 1 (2) cm large, yellowish to reddish-brown spots with many close and distinctly bordered aecia. Sporulating areas on the veins with slightly cushion-like bulges. Puccinia poae-aposeridis

2a Galls on the leaf blade or on the margin => 3

2b Hyaline callus on the midrib, radiating to lateral veins; venation strongly swollen; leaf blade sometimes ± malformed; centre yellowish discoloured. Spores predominantly in phloem. Protomyces kreuthensis

2c On the leaf blade, in many usually brownish spots, up to 1 mm long, sometimes slightly bulged. Entyloma aposeridis

3a Leaf blade glabrous, margin rolled upwards. Unidentified thrips

3b Leaf blade on the underside with small depressions and corresponding swellings on the upper side; strongly infected leaves sometimes ± twisted and rolled at the margin. Trioza dispar

3c Browning of leaf blade; at high densities rusting may occur. Epitrimerus protrichus

Last modified 3.vi.2020