92% confidence
Based on 20,000+ analyzed cases
Brown Spots on dracaena
What's Happening
Armored scale insects (Aspidiotus spp.) appear as small, flaky brown or tan bumps on Dracaena leaves and stems. They suck sap, causing localized brown spots, yellowing, and eventual leaf drop. These 'spots' can be nudged off with a fingernail, unlike fungal lesions.
How to Fix It
- 1
Manually remove visible scales using a cotton swab dipped in 70% rubbing alcohol.
- 2
Treat the entire plant with insecticidal soap or neem oil weekly for 3-4 weeks to kill crawlers (juveniles).
- 3
For severe infestations, use systemic granules containing imidacloprid in the soil.
How to Prevent It
Increase air circulation and avoid over-fertilizing with nitrogen, which attracts sap-suckers. Wipe leaves monthly with a damp cloth to detect early hitchhikers.
Related Problems
Same Problem on Other Plants
Frequently Asked Questions
What causes brown spots on my plant?
Armored scale insects (Aspidiotus spp.) appear as small, flaky brown or tan bumps on Dracaena leaves and stems. They suck sap, causing localized brown spots, yellowing, and eventual leaf drop. These '...
How do I fix brown spots?
Manually remove visible scales using a cotton swab dipped in 70% rubbing alcohol.. Treat the entire plant with insecticidal soap or neem oil weekly for 3-4 weeks to kill crawlers (juveniles)..
How do I prevent brown spots from happening again?
Increase air circulation and avoid over-fertilizing with nitrogen, which attracts sap-suckers. Wipe leaves monthly with a damp cloth to detect early hitchhikers.