Controlling Scale Insects on Schefflera and Monstera

A gardener asks how to eliminate scale insects that have appeared on schefflera and monstera plants.

Understanding Scale Insects

Scale insects have two distinct stages: mobile crawlers and sedentary adults. Crawlers are vulnerable to insecticidal soap, but adults protect themselves with a waxy covering that repels most treatments.

Effective Control Strategy

1. Monitor for crawlers: Apply insecticidal soap when crawlers are active (often spring)
2. Physical removal: Gently scrape adults off with a soft brush or cloth dampened with alcohol
3. Systemic treatment: For heavy infestations, consider systemic insecticides absorbed by the plant
4. Repeat applications: Multiple treatments spaced 7–10 days apart are usually needed

For detailed guidance on scale identification and control, including insecticidal soap use, see livingwithbugs.com/sca_ins.html.