Plant Parasites of Europe

leafminers, galls and fungi

gallers on Scirpus

Dichotomous table for gallers on Scirpus

(incl. Blysmus, Bolboschoenus, Eleogiton, Isolepis, Schoenoplectus, Trichophorum. ‒ Comp. Eleocharis)

by Hans Roskam

1a Galls on above-ground parts => 3

1b Galls on roots => 2

2a Swellings on all sides, slender, elongate spindle-shaped, many on markedly shortened lateral roots. S. sylvaticus: Meloidogyne hapla

2b wellings on root tips almost club-shaped. Many oblong-oval to lemon-shaped, yellowish spores inside. Isolepis fluitans: Entorrhiza raunkiaeriana

3a Swelling in stem, about 15 mm long, at junction of leaf blade and sheath, probably on stunted shoots; containing a white larva or pupa. Bolboschoenus maritimus: Eurina lurida

3b Uredinia on underside leaf, cinnamon brown, pulverulent. Telia on both sides, long covered by the epidermis, brownish black; teliospores one-celled on a persistent pedicel. Blysmus compressus; Bolboschoenus maritimus; Schoenoplectus lacustris: Uromyces lineolatus

3b Ovaries at first ± swollen, egg-shaped then destroyed and transformed into a smut grain up to 2 mm long, almost globular, compact, black inside. Trichophorum cespitosum incl. subsp. germanicum, pumilum: Anthracoidea scirpi

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