Identifying and Treating Scale Insects on Jade Plants

Those White Dots Are Scale, Not Fungus

The tiny white dots on older jade leaves that scrape off with a fingernail but don't rub off are almost certainly scale insects – likely armored scale, not mealybugs (which have a cottony texture).

Why Jades Need Gentle Treatment

Jade plants (Crassula ovata) are succulents and sensitive to many insecticides. Harsh chemicals can damage the foliage worse than the insects.

Safe, Effective Treatment

Isopropyl alcohol (rubbing alcohol) is the gold standard:

1. Use a cotton swab or small brush dipped in 70% isopropyl alcohol
2. Touch each scale individually for ~30 seconds
3. The alcohol dissolves the protective coating and kills the insect underneath
4. Repeat weekly until no new scales appear

For heavy infestations, a spray bottle with diluted alcohol (1:1 with water) can cover more area, but test on a few leaves first. Scraping manually works too but is labor-intensive on large plants.

Prevention

• Inspect new plants thoroughly before introducing
• Provide good air circulation
• Avoid overwatering – stressed plants attract pests
• Quarantine affected plants