What's eating my justicia scheidweileri?

Justicia scheidweileri is a tropical Acanthaceae grown indoors for its patterned leaves and tubular flowers. Spider mites are the most common pest, especially in warm, dry rooms. Mealybugs cluster at stem joints, and whitefly can build up on the leaf undersides. Monitor regularly and act early for best results.

Pale stippling across leaf surfaces and fine silk webbing beneath; leaves dull and drop in heavy infestations Increase humidity; spray with neem oil or insecticidal soap every 5–7 days; remove heavily affected leaves and dispose of them

Cottony white wax at stem nodes and in leaf axils; sticky honeydew leads to sooty mould Dab colonies with isopropyl alcohol; follow with insecticidal soap spray; repeat weekly for a month

Tiny white adults fly when plant is disturbed; nymphs on leaf undersides cause yellowing and reduce vigour Hang yellow sticky traps; apply neem oil or insecticidal soap to undersides of leaves; repeat every 5–7 days until no adults persist