Moehringia three-nerved sandwort
(For a dichotomous table for galls on Moehringia by Hans Roskam click here)
Dichotomous table for leafminers
1a fleck mine: Coleophora chalcogrammella
1b corridor or blotch => 2
1c galls, etc. => Tables for all parasites per species
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.