What's eating my thunbergia grandiflora?

Blue sky vine, grown indoors or in tropical gardens, is most affected by spider mites in dry conditions and whitefly colonies on its large leaves. Mealybugs can infest stem joints, and scale appears on woody stems. Maintain humidity and inspect the undersides of leaves regularly.

Pale speckling and fine webbing on leaf undersides; leaves turn yellow and drop in severe dry, warm conditions. Increase humidity with regular misting; wipe leaves with damp cloth; apply neem oil or insecticidal soap spray; repeat weekly.

Clouds of tiny white flies disturbed from leaves; yellowing foliage; sticky honeydew and resulting sooty mould. Use yellow sticky traps to monitor; apply insecticidal soap or pyrethrin spray; introduce Encarsia formosa parasitic wasp under glass.

White waxy cottony masses at stem joints and leaf axils; stunted growth and leaf yellowing. Dab individual colonies with isopropyl alcohol on a cotton swab; spray whole plant with neem oil solution; repeat every 5–7 days.