Hydrocharis frogbit
Dichotomous table for leafminers
1a blotch; larva with chitinised head: Elophila nymphaeata
1b corridor; larva a maggot : Hydrellia albifrons
1c galls, etc => Tables for all parasites per species
1a blotch; larva with chitinised head: Elophila nymphaeata
1b corridor; larva a maggot : Hydrellia albifrons
1c galls, etc => Tables for all parasites per species