Identifying and Treating Mealybugs or Scale on Staghorn Ferns

An indoor staghorn in a tropical climate had short, bright white, chalky lines (½" long, ⅛" wide) on the undersides of leaves. Leaves looked healthy; two outdoor plants were unaffected.

Likely Pests

Mealybugs or scale—minor infestation. Exact ID needs magnification.

Treatment

1. Mix 2 tablespoons dish detergent in 1 cup water.
2. Wipe or gently peel off the pests with a smooth cloth dipped in the solution.
3. If they don't peel easily, the detergent will kill them and prevent spread.

Monitoring

Scout every 3 months. As long as infestations stay minor, repeat the same cleaning. Severe cases may need stronger measures, but that's unlikely here.