Moehringia three-nerved sandwort

Dichotomous table for leafminers

1a fleck mine: Coleophora chalcogrammella

1b corridor or blotch => 2

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

2a mine begins near an under-surface egg shell (the larva can move to a new mine, making a large hole for entrance): Pegomya flavfrons

2b no egg visible at the start of the mine => 3

3a frass sparingly, in black grains: Amauromyza flavifrons

3b frass powdery, in green clouds, mainly along the sides of the mine and in the end of short side branches: Scaptomyza graminum

Not included in the key: Caryocolum alsinella, moehringiae; Cnephasia incertana; Coleophora moehringiae; Delia quadripila; Oreorrhynchaeus alpicola; Pegomya holosteae.

mod 9.x.2017