Scirpus, club-rush

Incl. Blysmus, Bolboschoenus, Eleogiton, Holoschoenus, Isolepis, Schoenoplectella, Schoenoplectus, Scirpoides.

1a mine upper- or lower-surface, greenish in transparancy; frass in 1 or a few large lumps; larva a maggot => 2

1b mine full depth, transparant; frass in small grains; larva with chitinised head => 4

1c galls, etc => 100

2a mine ends in the leaf sheath, there also the puparium; larva: front spiraculum strongly enlarged, bifid, with > 20 papillae: Cerodontha scirpi

2b mine ends in the blade; front spiraculum normal, < 20 papillae => 3

3a larve: near the base of the rear spiraculum a black wart; papillae of the rear spiraculum enlarged, claw-like (also visible in the puparium): Cerodontha angulata

3b rear spiraculum without a black wart, papillae less specialised (occurrence on this hostplant uncertain): Cerodontha suturalis

4a larva: anal shield with a tickened rim, ending to diverging teeth: Orthotelia sparganella

4b anal shield withouth a tickend rim, untoothed => 5

5a larvae in Autumn-May => 6

5b larvae in July-August: Monochroa moyses

6a mine begins halfway the blade, runs upwards, then descends to about the level of its begin : Elachista scirpi

6b mine begins in the leaf tip, descending from there: Elachista serricornis

100a Nematoda => 101

100b Acari => 102

100c Coleoptera => 103

100e Diptera => 104

100f Hemiptera => 105

100d Hymenoptera => 106

100g rust fungi => 107

100h smut fungi => 108

100i powdery and downy mildews => 109

100j other causers => 110

104 – Diptera

104a Chloropidae: Eurina lurida

107 – rust fungi

107a Pucciniaceae: Puccinia scirpi; Uromyces lineolatus

108 – smut fungi

108a Anthracoideaceae: Portalia uljanishcheviana

108b Microbotryaceae: Kriegeria eriophori

108c Urocystidaceae: Urocystis bolboschoeni

110 – other causers

110a Fungi, Entorrhizaceae: Entorrhiza raunkiaeriana

110b Fungi, Physodermataceae: Physoderma schroeteri

Not included in the key: Aphanisticus pygmaeus; Globia algae; Cerodontha morosa; Cosmopterix attenuatella; Elachista carinisella, eleochariella; Ochsenheimeria bubalella.