Plant Parasites of Europe

leafminers, galls and fungi

gallers on Gypsophila

Dichotomous table for gallers on Gypsophila

by Hans Roskam

1a On parts above ground => 3

1b On roots => 2

2a Spindle-shaped swellings on roots, up to 5 mm long and 2 (3) mm thick. G. elegans: Meloidogyne hapla

2b Conspicuous, proliferations on roots, root collar and stem base; 0.5–4.5 mm long; pale coloured, wrinkled-tuberculate at surface. Gypsophila spp.: Pantoea agglomerans pv. gypsophilae

3a On flowers => 9

3b On stems, shoot tips, or lateral leaf buds => 4

4a On shoot tips, buds or leaves => 5

4b Stem with expanded spindle-shaped swellings, the pith containing a caterpillar. G. fastigiata, paniculate: Caryocolum leucomelanella

5a On shoot tips or buds => 8

5b On leaves => 6

6a Malformations caused by animals => 7

6b Leaves sometimes with slightly swollen bulging, compact sori of dark-brown telia. G. elegans, muralis: Puccinia arenariae

7a Leaf blades at any point along length knee-like bent almost at right-angles. Breaking point close to midrib succulent, swollen, usually yellow-green, sometimes reddish. G. fastigiata: Planchonia arabidis

7b Leaves locally clustered, ± deflected and curled, partially deep green. Gypsophila spp.: Philaenus spumarius

8a Shoot tips or lateral buds stunted. Leaves transformed into a hemispherical to onion-shaped, often reddened gall. Occasionally enveloped by a spreading, basally strongly swollen ± fully developed pair of leaves; also may develop ± stunted leaf blades only at the base of galled leaves. Containing a single or several deep orange coloured larvae. G. fastigiata, repens: Bayeriola buhri

8b Leaves ± enlarged at the tip of vegetative shoots, curved inwards, ± converging, discoloured. G. repens: Unidentified aphid

9a Flower buds stunted, globularly inflated; containing dirty-yellow to brown-violet spores. Usually many to all flowers are disfigured on diseased plants. ? G. muralis: Sorosporium gypsophilae

9b Fungus develops in shortened and broadened anthers. Spores red-violet. G. repens: Microbotryum violaceum

Last modified 21.iv.2020