Papaver poppy

Dichotomous table for leafminers

1a mine full depth; larva with chitinised head: Stenocarus ruficornis

1b mine upper- or lower-surface; larva a maggot => 2

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

2a frass extremely fine, or absent; mine an irregular blotch; larvae: mandible with 1 tooth: Hydrellia griseola

2b frass less fine; mine more or less elongate; mandible with 2 teeth => 3

3a puparium in the mine, in a, usually lower-surface, pupal chamber; frass in well-spaced grains; corridor independent of the midrib: Chromatomyia horticola

3b pupation outside the mine; frass, at least partly, in strings or pearl chains; mine oriented over the midrib => 4

4a pinnately branched corridor: Liriomyza strigata

4b irregular elongated blotch: Liriomyza xanthocera

mod 9.x.2017