What's eating my spiraea nipponica 'snowmound'?

Spiraea nipponica 'Snowmound' is primarily attacked by spiraea aphids clustering on new shoots in spring. Leaf roller caterpillars may web foliage, and Japanese beetles skeletonize leaves in summer. This cultivar's vigorous, dense habit means slug and snail damage to new growth can occur at the base in wet conditions.

Pale green colonies massed on shoot tips; sticky honeydew residue; distorted and curled new leaves Spray with insecticidal soap or neem oil; prune infested shoot tips; encourage ladybirds and lacewings

Leaves rolled and webbed together; caterpillar feeding inside causes browned, ragged foliage Hand-pick and destroy rolled leaves; apply Bt spray at caterpillar stage; remove old foliage debris in autumn

Skeletonized leaves with intact veins; adults feed in groups on upper foliage in July–August Hand-pick in early morning; apply neem oil as deterrent spray; treat surrounding soil/lawn with milky spore