What's eating my plectranthus scutellarioides 'kong rose'?

Coleus 'Kong Rose' is a large-leafed foliage plant grown outdoors in shade borders and containers. Whiteflies and mealybugs are the most troublesome pests, weakening stems with sap-feeding. Aphids cluster on new growth. Outdoors, slugs can damage the broad, colourful leaves in damp conditions. Neem oil and insecticidal soap resolve most issues.

Tiny white insects fly up when the plant is disturbed; nymphs suck sap from leaf undersides, causing yellowing, sticky honeydew, and premature leaf drop on the large foliage. Hang yellow sticky traps; apply neem oil or insecticidal soap to leaf undersides; repeat every 5–7 days; introduce parasitic wasps (Encarsia formosa) in glasshouses.

White, waxy cottony clumps in leaf axils and on stem joints; affected foliage yellows and distorts; honeydew fosters sooty mold. Dab colonies with isopropyl alcohol on a cotton swab; spray with neem oil or insecticidal soap; check new plants carefully before placing alongside established ones.

Clusters of soft insects on shoot tips and new leaves; leaves curl and mottle; sticky honeydew on the colourful foliage. Blast off with water; apply insecticidal soap or neem oil; repeat weekly until gone.

Ragged holes chewed through the broad, decorative leaves overnight, especially in damp, shaded conditions. Hand-pick at night; use iron-phosphate pellets around the base; apply diatomaceous earth or copper tape on containers.