Treating Scale on Majesty Palm and Spider Mites on Dieffenbachia

Pest Identification

• Majesty Palm: White sticky substance + brown spots on leaf undersides = Scale insects (likely soft scale). The sticky "honeydew" attracts sooty mold.
• Dieffenbachia: Yellowing leaves + spider-like webs at base = Spider mites. Tiny arachnids that suck chlorophyll, causing stippling and bronzing.

Why Detailed Treatment Matters

Effective control requires thorough coverage, proper timing, and often repeated applications. Space limits a complete guide here, but I have a detailed article covering identification, life cycles, and step-by-step treatment for both pests (including non-toxic options like horticultural oil, insecticidal soap, and biological controls).

Immediate Actions

1. Isolate both plants from others.
2. For scale: Wipe accessible scales off with a cotton swab dipped in rubbing alcohol. Then spray entire plant (stems, leaf undersides) with neem oil or horticultural oil per label.
3. For spider mites: Spray forcefully with water to dislodge webs and mites. Follow with insecticidal soap or neem oil, covering all surfaces. Repeat in 5–7 days.
4. Increase humidity around Dieffenbachia (mites hate moisture).

Email me at wcreed@HorticulturalHelp.com for the full article. Include "Pest Article Request" in the subject.