Amaranthus amaranth

Dichotomous table for leafminers

1amine upper- or lower-surface, usually a corridor, rarely an elongated secondary blotch => 2

1bmine largely full depth, mostly more or less a blotch => 5

1c galls, etc. => Tables for all parasites per species

2amine a short fine corridor that ends on a vein; from there the larva enters the stem and continues as a borer: Amauromyza chenopodivora

2bmine from start to end in the leaf lamina => 3

3amine pinnately branched; main branch positioned over the midrib: Liriomyza strigata

3bmine not or irerregulary branched, not associated with the midrib => 4

4afrass in short strings; puparium formed outside the mine: Liriomyza bryoniae

4bfrass in isolated grains; puparium in the mine, in a, usually lower-surface, pupal chamber: Chromatomyia horticola

5aseveral large blotch mines in, usually young, leaves; the larva migrates from one leaf to the other through the stem that is excavated meanwhile: Delia echinata

5bthe larva limits itself to one leaf => 6

6alarva a colourless maggot; an egg shell present a the beginning of the mine; mine with shallow parts:Scaptomyza graminum

6blarva with distinct head and feet, and red markings; no egg shell; mine full depth throughout => 7

7amine a densely coiled corridor; frass in broad green bands: Chrysoesthia drurella

7bfully developed mine a primairy blotch; frass in large black lumps: Chrysoesthia sexguttella

Not included in the key: Coleophora versurella; Pegomya hyoscyami.

mod 9.x.2017