What's eating my flowering quince 'crimson and gold'?

Flowering quince 'Crimson and Gold' suffers from aphids on new growth, scale insects on woody stems, and brown scale along the branches. Caterpillars occasionally graze foliage. It is also a favourite target for brown scale and San Jose scale. Leaf spots and aphids top the pest list — the dense thorny habit deters large animals.

Curled, sticky young leaves in spring; colonies on soft new shoot tips, especially after hard pruning Encourage beneficial insects; spray with insecticidal soap or neem oil; avoid excessive nitrogen feeding which promotes soft, aphid-attractive growth

Oval, shiny brown domes on bark and stems; heavy infestations cause dieback and sooty mould on leaves below Scrape off with a fingernail or brush; spray with dormant horticultural oil in late winter to kill overwintering stages; systemic insecticide in late spring targets crawlers

Holes in leaves; young leaves webbed together with silk threads; blossom may be damaged in early spring Apply sticky grease bands in autumn/winter; spray Bt at bud burst; hand-pick small caterpillar clusters; good garden hygiene removes pupation sites