Rumex, dock, sorrel

Incl. Acetosa, Acetosella.

1a brown tentiform mine: Calybites phasianipennella

1b tiny corridor or blotch, < 1 cm, usually several in a leaf: Hypera rumicis

1c corridor, may widen into a blotch => 2

1d blotch, without an evident initial corridor => 6

1e galls, etc. => 100

2a corridor epidermal, silvery: Calybites phasianipennella (young mine)

2b corridor full depth => 3

3a corridor hardly widening => 4

3b corridor appreciably widened in the end => 5

4a the corridor makes about 5 circles or semicircles around the egg: Enteucha acetosae

4b corridor not spiraled: Adscita statices

5a imago (beetle): metallic green: Mantura chrysanthemi

5b imago steel blue: Mantura obtusata

6a blotch rather small, with broad extensions, usually at the leaf margin; larva with chitinised head; at start of the mine no egg shells visible: Mantura rustica

6b blotch large, eventually huge; larvae maggots; at the start of the mine, at the leaf underside, a group of elongated egg shells => 7

7a larva: mandible with some fine teeth (rare): Pegomya bicolor

7b mandible with ± 3 large teeth (very common): Pegomya solennis

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

101b Heteroderidae: trifolii

101c Meloidogynidae: Meloidogyne hapla

102 – Acari

102a Eriophyidae: Aculops macrotuberculatus, Epitrimerus rumicis

104 – Diptera

104a Cecidomyiidae: Contarinia acetosellae, rumicina, rumicis, scutati, variabilis; Jaapiella rubicundula

104b Scathophagidae: Norellisoma spinimanum

108 – smut fungi

108a Microbotryaceae: Microbotryum goeppertianum, kuehneanum, parlatorei, stygium, warmingii

109 – powdery and downy mildews

109a Erysiphaceae: Erysiphe polygoni; Leveillula taurica

109b Peronosporaceae: Peronospsora rumicis

110 – other causers

110a Fungi, Micosphaerellaceae: Ramularia rubella

110b Fungi, Physodermataceae: Physoderma acetosellae, majus, ruebsaameni

110c Fungi, Synchytriaceae: Synchytrium anomalum

110d Lepidoptera, Sesiidae: Pyropteron triannuliformis

Not included in the key: Cnephasia asseclana, incertana; Liriomyza trifolii; Monochroa rebeli, rumicetella, sepicolella; Neofriseria peliella; Orthochaetes setiger; Pegomya haemorrhoum; Teleiopsis lunariella, rosalbella.

21/04/2017