Iris, iris

fam. Iridaceae

1a small cavity in the leaf (no corridor, too small to be called a blotch); larva slender, yellow, without feet: Dicerura iridis

1b mine m ore extensive => 2

1c galls, etc => 100

2a larva a maggot; frass in black lumps => 3

2b larva with feet and chitinised head => 4

3a mine uniform in depth, greenish in transparancy; larva solitary; puparium in the mine, positioned parallel to the leaf: Cerodontha iraeos

3b mine strongly variable in depth, in transparancy varying from greenish to glassy; larvae often communal; puparium positioned at right angle to the leaf: Cerodontha iridis

4a larva remains in the mine till close to pupation; mine large: Monochroa divisella

4b only the young larva mines (lives as a borer in the rootstock later); mine small => 5

5a larva: anal shield with tickened rim, ending in two divergent teeth: Orthotelia sparganella

5b anal shield without thickened rim, toothless => 6

6a larva greyish-brown with scattered black dots: Helotropha leucostigma

6b larva pale green; head and pronotum light-brown => 7

6c larva almost black: Oxytripia orbiculosa

7a uniformly light greyish green, with a narrow bright green dorsal length line: Globia algae

7b larva pale greenish with four darker length lines: Globia sparganii

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

101 – Nematoda

101a Anguinidae: Ditylenchus dipsaci

103 – Coleoptera

103a Curculionidae: Mononychus punctumalbum

107 – rust fungi

107a Pucciniaceae: Puccinia dobrogensis, iridis, urticae-xiphiodis

110 – other causers

110a Fungi, Capnodiales: Cladosporium iridis

110b Fungi, Physodermataceae: Physoderma iridis