Dichotomous table for gallers on Caragana arborescens
by Hans Roskam
1a On parts above ground => 2
1b Roots with laterally or terminally inserted branched nodules, oval, cylindrical or terminally fork-like, finger-shaped to coralloid. Rhizobium leguminosarum
2a Minor malformations of leaves. – Unidentified aphid
2b Main stems with ± spindle- or club-shaped swellings bearing mistletoe. Viscum album
= The gall mite Aceria arceosae, hidden in leaf axils, causes withering of buds.
= The mildew Erysiphe palczewskii has been reported from pea shrub
= The rare gall midge Dasineura sibirica may cause a pest