Foodplant / spot causer
amphigenous colony of Cercospora dematiaceous anamorph of Cercospora violae causes spots on live leaf of Viola canina
Remarks: season: 6-7

Foodplant / miner
larva (early) of Pancalia latreillella mines leaf of Viola canina

Foodplant / feeds on
larva of Protoemphytus pallipes feeds on leaf of Viola canina

Foodplant / gall
aecium of Puccinia violae causes gall of live petiole of Viola canina

Foodplant / spot causer
amphigenous colony of Ramularia anamorph of Ramularia lactea causes spots on live leaf of Viola canina
Remarks: season: 9-10

In Great Britain and/or Ireland:
Foodplant / spot causer
epiphyllous, numerous, scattered, brownish pycnidium of Septoria coelomycetous anamorph of Septoria violae causes spots on fading stipule of Viola canina
Remarks: season: 8-9