Eradicating Scale Insects on Ficus and Other Houseplants

Identification

Small brown/gray bumps on leaves/stems + sticky honeydew = scale insects.

Effective Treatments

• Alcohol-soap spray: 1 part rubbing alcohol + 6-8 parts water + liquid soap. Drench all surfaces until dripping. Repeat weekly.
• Horticultural oil: Good penetration.
• Brand X Foliage Cleaner: Silicon-based, penetrates crevices. Available from Southwest Plantscape Products (800-333-7977).
• Systemic Imidacloprid (Merit/Marathon): Soil drench or foliar spray; follow label.

Strategy

Treat all suspect plants simultaneously. Prune large plants first to ease coverage. Outdoor treatment reduces mess.