Plant Parasites of Europe

leafminers, galls and fungi

gallers on Aesculus

Dichotomous table for gallers on Aesculus

by Hans Roskam

1a On leaves or on branches => 2

1b Inflorescence with abnormal felt-like pubescence. A. hippocastanum: Unidentified gall mite

2a On leaves => 3

2b Thicker branches with spindle- to club-shaped swellings, bearing Viscum album

3a Localised galls on leaf blade => 4

3b Leaves rolled downwards. A. hippocastanum, pavia: Aphis fabae

4a Lenticular gall on leaf underside. A. hippocastanum: Unidentified gall midge

4b Abnormal tufts of hairs on underside of vein axils; on upper side a corresponding arching. Hairs many-celled, long, weakly club-shaped. Aesculus spp: Aculus hippocastani

4c Rusting and abnormal hairiness of leaf blade. A. hippocastanum, glabra, neglecta: Shevtchenkella carinata

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