Fraxinus ash

Dichotomous table for leafminers

1a corridor, in the end often widening into a blotch => 2

1b blotch from the start: Gracillaria syringella

1c fleck mine: Coleophora badiipennella

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

2a mine upper-surface, rarely lower-surface => 3

2b mine full depth, very transparant: Prays fraxinella

3a min epidermal, silvery; frass in central line; larva, with evident head and feet, later lives free in a leaf roll: Caloptilia cuculipennella

3b min deeper, not silvery; frass in grains or rods at either side of the gallery; larva, a maggot, mines all its life => 4

4a gallery broad at its start; frass in grains; primary and secondary feeding lines conspicuous: Aulagromyza heringii

4b gallery narrow at its start; frass in rods; no conspicuous feeding lines: Aulagromyza fraxini

small corridor in the fruits: Prays ruficeps.

Not included in the key: Coleophora trigeminella (xenofagy); Ectoedemia obtusa; Gracillaria loriolella.

mod 9.x.2017