In Europe as many as 69 species of insects and seven species of fungus utilize Garlic Mustard as a food plant, including the larvae of some Lepidoptera species such as the Garden Carpet moth.
Adult flies were found from May to August visiting flowers of Aegopodium podagraria, Alliaria petiolata, Anthriscus sylvestris, Apiaceae, Aurinia saxatilis, Conium maculatum, Crataegus laevigata, Euphorbia cyparissias, Meum athamanticum, Potentilla reptans, Ranunculus repens, Salix spec.
Females have been observed laying eggs on various herbaceous plants, including Ajuga, Alliaria petiolata, Glechoma hederacea and Urticae species.