Arctium burdock
Incl. Lappa.
(For a dichotomous table for galls on Arctium by Hans Roskam click here)
Dichotomous table for leafminers
1a fleck mine => 2
1b corridor and/or blotch => 5
1c galls, etc => Tables for all parasites per species
Dichotomous table for leafminers
1a fleck mine => 2
1b corridor and/or blotch => 5
1c galls, etc => Tables for all parasites per species
2a case helicoidal; hole in the mine not precisely round: Apterona gracilis
2b case tubular; hole precisely round => 3
3a composite leaf case: Coleophora onopordiella
3b tubular silken case => 4
4a case dark brown: Coleophora paripennella
4b case light brown: Coleophora peribenanderi
5a clear, long, corridor or secondary blotch => 6
5b short, relatively broad corridor, corridor-blotch or blotch => 9
6a corridor exceptionally long: Sphaeroderma rubidum
6b narrow corridor that ends upon a thick vein: Phytomyza continua
6c secondary blotch: Phytomyza lappivora
6d normal corridor => 7
7a pinnately branched corridor on top of a thick vein, side branches directed forward: Liriomyza strigata
7b corridor not associated with a vein => 8
8a pupation in the mine, in a, usually lower surface, pupal chamber: Chromatomyia cf. syngenesiae
8b pupation external; mostly many, intercrossing corridors in a leaf : Phytomyza lappae
9a clear, large, blotch => 10
9b small blotch, corridor-blotch, or mine of nondescript form => 12
10a larva a maggot; often many mines in a leaf, starting at a thick vein: Pegomya laticornis
10b larva with chitinised head => 11
11a mine contains little frass; larva mines all its life: Agonopterix carduella
11b mine with ample quantities of frass; older larvae live free among spun leaves: Tebenna micalis
12a larva without feet: Phytosciara macrotricha
12b larva with prolegs and thoracic feet => 13
13a larva: prothoracic plate brown or black, with a light anterior margin => 14
13b prothoracic plate without light anterior margin => 16
14a larva: pinacula colourless (although the base of the setae is black): Cnephasia incertana
14b pinacula black => 15
15a larva: behind/below the anus a black chitinous comb: Cnephasia asseclana
15b no anal comb present: Cnephasia stephensiana
16a head yellowish to brown; pale yellow or green: Agonopterix arenella
16b head black; green => 17
17a dull green; June – early July: Agonopterix subpropinquella
17b apple green; July – earl August: Agonopterix propinquella
Not included in the key: Liriomyza bryoniae, Liriomyza trifolii; Phytosciara halterata, Phytosciara macrotricha