In Great Britain and/or Ireland:
Plant / resting place / within
puparium of Chromatomyia horticola may be found in leaf-mine (end of) of Galeopsis

Plant / resting place / within
diurnal larva of Chrysolina fastuosa may be found in fruiting calyx of Galeopsis

Foodplant / gall
Cryptomyzus galeopsidis causes gall of live leaves (terminal) of Galeopsis
Other: sole host/prey

Foodplant / sap sucker
Cryptomyzus ribis sucks sap of leaf of Galeopsis
Remarks: season: summer

Foodplant / open feeder
larva of Dibolia cynoglossi grazes on leaf of Galeopsis

Plant / associate
adult of Dicyphus errans is associated with live Galeopsis
Remarks: season: 6-10

Foodplant / spot causer
hypophyllous, immersed, brown pycnidium of Septoria coelomycetous anamorph of Septoria galeopsidis causes spots on leaf of Galeopsis