Aloe Vera Scale Insect Infestation: Identification and Treatment

A young outdoor aloe vera in Florida developed tiny, dry, sesame seed-sized brown spots on lower central leaves. Plant was previously thriving with three new leaves.

Diagnosis: Scale Insects

The description matches scale insects—small, immobile pests that attach to leaves and feed on sap. Their protective coverings appear as tiny brown/white bumps. The "scab-like" appearance is characteristic.

Treatment Options

• Physical removal: Scrape off with fingernail or soft brush for light infestations.
• Insecticidal soap or neem oil: Apply weekly for 3-4 weeks to catch crawlers (mobile nymph stage).
• Horticultural oil: Smothers adults; use in cooler hours to avoid leaf burn.
• Systemic insecticide: For severe cases (imidacloprid), but avoid on edible aloe.

Prevention

Inspect new plants thoroughly. Quarantine additions. Maintain plant vigor—stressed plants attract more pests. The Virginia Tech scale insect factsheet provides detailed lifecycle and control information.