What's eating my deutzia scabra 'plena'?

Deutzia scabra 'Plena' is a tough flowering shrub with few serious pests, but aphids attack new shoot tips in spring and scale insects may colonize mature bark. Deer will browse flower buds and young growth. Slugs and snails can damage new emerging shoots at soil level in damp conditions.

Colonies on new growth causing sticky residue, curled leaves, and reduced vigour on flower-bearing shoots Blast off with water; use insecticidal soap or neem oil spray; attract or introduce aphid predators

Rounded brown waxy shells on stems and branches; yellowing foliage and stem dieback where infestations are heavy Remove by hand or with a stiff brush; apply horticultural oil in late winter before growth starts

Torn shoot tips and stripped flower buds, particularly in spring when new growth is soft and palatable Install physical deer barrier; apply deer repellent spray to foliage in late winter and spring