Tiny white dots on Dracaena leaves are scale insects (cousins of mealybugs). Their waxy coating repels sprays. Coat leaves top and bottom with neem oil to suffocate them.

Scale and Sooty Mold on Potted Meyer Lemon: Treatment and Prevention
Scale Insects on Sago Palm: Sticky Honeydew, Yellow Fronds, and Step-by-Step Treatment
Sticky 'Dirt' on Dwarf Lemon Leaves: Scale, Sooty Mold, and Protecting Your New Lime Tree
Black Dots on Vinyl Siding: Scale Insects or Lady Beetle Eggs?
Scale Insects on Fork-Leaf Sundew: Systemic Insecticide Treatment
Insects in Mass Cane (Dracaena) Soil: Repot and Sanitize
Camellia Tea Scale and Barklice: Dual Pest Problem Requires Targeted Treatment
Sooty Mold on Large Meyer Lemon: Scale Control for Big Bushes
Asian Cycad Scale on Sago Palm: Identification, Spray Schedule, and Monitoring
Sudden Black Bugs on Ceiling + Green Caterpillar in Lamp: Likely Unrelated
Scale Insects on Indoor Orange Tree: Soap Sprays, Not Peroxide
Scale Insects on Large Blue Spruce: Organic Limits and Effective Treatment
Comprehensive Scale Treatment for Ficus
Scale or Mealybugs on Mixed Houseplants: Dual Treatment Strategy
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