Plant Parasites of Europe

leafminers, galls and fungi

gallers on genus Dorycnium

Dichotomous table for gallers on Dorycnium

by Hans Roskam

1a On parts above ground => 2

1b Roots usually with laterally inserted oblong-oval or cylindrical swellings, apically often forked or branched, almost coralloid, sometimes clustered. Dorycnium spp.: Rhizobium leguminosarum

2a On flowers or fruits => 5

2b On vegetative parts => 3

3a On shoot tips or leaves => 4

3b Shoot axis with oblong, reddened swelling. D. pentaphyllum subsp. Germanicum: cf. Melanagromyza cunctans

3c Conspicuous spindle-shaped swelling, bright red coloured, flattened on one side, with rimmed depressions containing the causer. D. pentaphyllum: Planchonia arabidis

4a Leaflets folded. D. pentaphyllum subsp. germanicum + herbaceum: Unidentified gall mite

4b Terminal leaflets of leaf folded, pod-like, reddish discoloured. Containing several at first yellowish-white later orange larvae. D. hirsutum: Dasineura sp.

4c Tip of side shoot with greenish, closed, strongly white pubescent gall, up to 7 mm long and 3 mm thick. D. hirsutum, pentaphyllum: Asphondylia dorycnii

5a Galls on pods => 6

5b lowers disfigured and ± greened, as well as other organs present on shoot tip variously disfigured organs abnormally pubescent. Dorycnium spp.: Aceria euaspis

6a Pod swollen. Inner wall covered with fungus. D. hirsutum, pentaphyllum: Asphondylia dorycnii

6b Pods swollen; mycelium absent. Containing a curved larva with head capsule. D. pentaphyllum & subsp. germanicum + herbaceum: Ischnopterapion aeneomicans

Last modified 17.xi.2023