Plant Parasites of Europe

leafminers, galls and fungi

gallers on Coronilla

Dichotomous table for gallers on Coronilla

(incl. Securigera, see also Hippocrepis)

by Hans Roskam

1a On parts above ground => 3

1b Galls on roots => 2

2a Main- and side roots often with many fleshy nodules, up to about 7 mm long and 4 mm broad, oblong-oval, or at proximal part flattened and ± subdivided, laterally inserted. Coronilla spp.; Securigera spp.: Rhizobium leguminosarum

20b Irregular rotund, little galls on main root with central larval chamber. Each gall contains a single beetle larva. C. scorpioides: Catapion pubescens

3a On stems, buds or fruits => 6

3b On leaves => 4

4a Leaf blade folded or rolled inwards, caused by animals => 5

4b Internodes of completely diseased young shoots elongated; petioles and midrib ± thickened; leaf blades reduced, thickened, soon covered with grey-violet down of branched conidiophores on underside, Coronilla coronata, repanda subsp. dura, scorpioides; Securigera varia: Peronospora coronillae

5a Leaflets folded pod-like on midrib, the middle part especially strongly thickened. Securigera varia: Unidentified gall midge

5b Pale, indistinct pod-like folds of leaf blades of Securigera varia: Unidentified thrips

5c Leaflets twisted, folded, rolled inwards at margin. Coronilla coronata, Securigera varia: Aculus coronillae

5d Malformation of leaves and/ or inflorescences, flowers. Coronilla valentina subsp. glauca + pentaphylla: Hemitrichapion andalusicum

6a Midge galls in axillary buds or in pods => 7

6b Basal stem parts with ± expanded, often curved, bulging swellings, with single- or several rimmed depressions. Coronilla spp.; Securigera spp.: Planchonia arabidis

7a Pods disfigured => 10

7b Malformation of vegetative tissues => 8

8a Gall cavity absent, or if present, not covered with mycelium => 9

8b Gall cavity lined with mycelium. Leaf axil with bud-like gall, mainly arising from the fleshy thickened lower part of petiole and enlarged stipules. Inner wall with mycelium. Containing a single larva. Coronilla minima: Asphondylia coronillae

9a Irregular clusters consisting of hypertrophied leaflets, terminally on stem, rotund or egg-shaped, of variable size (averaging 8–9 x 7–8 mm), succulent, green- or pink-coloured. Containing several red, dull midge larvae. Coronilla juncea, valentina subsp. glauca: Dasineura coronillae

9b Leaflets pod-like swollen. Larvae glossy and jumping. Securigera varia: Contarinia coronillae

10a Pod with rotund to egg-shaped swelling. Inner wall with mycelium. Containing a single larva. Coronilla coronata, minima; Securigera varia: Asphondylia baudysi

10b Locally ± globularly swollen pods. Coronilla minima: Asphondylia coronillae

Last modified 4.v.2020