Plant Parasites of Europe

leafminers, galls and fungi

gallers on Gladiolus

Dichotomous table for gallers on Gladiolus

by Hans Roskam

1a On leaves and scapes => 4

1b On roots or tubers => 2

2a Malformations on tubers => 3

2b Roots with nodular swellings. G. x gandavensis, x hybridus: Meloidogyne hapla

3a Bulge-like galls on tuber surface => 4

3b Yellow-brown large “leafy galls”, tuber- or scale-shaped accumulations at the base of the tuber, up to 40 mm in cross section. Gladiolus spp.: Rhodococcus fascians

4a Blackish, partially yellow margined bulge-like swellings on leaves, stems and tubers. Releasing a dark brown powder consisting of spore balls after breaking open. G. imbricatus, italicus, palustris: Urocystis gladiolicola

4b Less severely infected tubers that are partially destroyed internally develop only some variously bleached and curved leaves, bearing ± oblong spindle-shaped, spongy bulges. Gladiolus spp.: Ditylenchus dipsaci

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