Scale Insect Treatment Guide for Houseplants

How to identify and treat scale insects on houseplants. Hard or soft brown bumps on stems and leaves. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: Appearance: Brown bumps attached to stems and leaves. Types: Hard scale (armored) and soft scale (cottony). Damage: Suck sap, cause yellowing, drop sticky honeydew. Hard to treat: Waxy covering protects them from sprays. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Often introduced on new plants. They look like part of the plant — easy to miss. Produce sticky honeydew that attracts sooty mold. Can weaken and eventually kill a plant. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Scrape off visible scale with a soft toothbrush. Dab each one with rubbing alcohol on a cotton swab. Spray with horticultural oil or neem oil. Repeat every 7 days for a month. Systemic insecticide for severe infestations. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Plant Care Guides collection on Houseplants Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.