What's eating my campanula glomerata 'superba'?

Campanula glomerata 'Superba' is heavily targeted by slugs and snails, which shred flowers and foliage especially in wet conditions. Aphids colonize soft stems, and vine weevil can attack the crown. Caterpillars occasionally graze flower heads. Rabbits browse campanulas readily in open gardens. Slugs are by far the most consistent and damaging pest.

Large irregular holes in leaves and flowers; stems severed at ground level; extensive slime trails Ferric phosphate pellets; grit or sharp-sand mulch; evening patrol and hand removal; biological control with Phasmarhabditis nematodes

Soft insect masses on stems and under leaves; distorted shoot tips; honeydew and sooty mould Spray insecticidal soap or neem oil; blast with water; attract lacewings and ladybirds

Clean-cut browning or complete removal of flowering stems at ground level overnight Wire mesh guards or perimeter fencing; rabbit repellent spray on surrounding area

Crown and root damage; plant wilts and collapses, especially after transplanting or in containers Nematode soil drench in late summer; remove grubs when dividing clumps in spring