Identification
Tiny (0.3–0.5 mm) arachnids, hard to spot with the naked eye, feeding on the underside of leaves. Symptoms: fine, pale speckling (feeding punctures); over time the leaves turn grey, yellow and dry out. Under heavy infestation a fine webbing becomes visible. Warm, dry air favours their development — a common problem for houseplants in winter near radiators.
Treatment
Raising air humidity (misting, a humidifier), washing the leaves with water, potassium soap or oil-based preparations. In biological control, predatory mites are used. Remove heavily infested leaves.
Sources
- Atlas of ornamental-plant pests
