What scale looks like
Scale insects often look like harmless bumps. They attach to stems and leaf veins and do not move much once settled.
Common forms:
- Brown oval bumps on stems
- Flat discs on the underside of leaves
Confirm scale
Try to lift one bump with a fingernail. If it pops off like a shell, it is probably scale.
Treatment plan
Step 1: Physical removal
Scale is tough because sprays do not always penetrate.
- Scrape gently
- Wipe stems and joints with alcohol
Step 2: Repeat
New scale can appear from eggs or missed spots.
- Re-check weekly for 2 to 3 weeks.
Step 3: Heavy infestation
If the plant is covered:
- Consider pruning
- Use insecticidal soap as support
- Separate from other plants until stable
Prevention
- Inspect stems closely when buying plants
- Keep plants spaced
- Clean leaves routinely