Mealybugs on Dracaena — White Cotton at the Leaf Bases and Cane Nodes
Dracaena (Dracaena fragrans (and related species))
Symptoms
- white cottony or waxy deposits at the junction of leaves and cane
- white material visible in the cane nodes (where multiple leaves emerge)
- sticky honeydew on the inner lower surface of leaves
- individual leaves yellowing near their base while the leaf tip remains green
- white powder visible on stems near the soil
Causes
Planococcus citri establishing at sheltered growing points
Dracaena's architecture creates ideal mealybug habitat: the points where leaves emerge from the cane form tight, sheltered crevices that are warm, protected from drying air, and adjacent to the plant's phloem transport tissue. Mealybugs locate these growing points precisely because they offer access to phloem sap and protection from physical disturbance. On corn plants (Dracaena fragrans), the broad leaf bases wrap tightly around the cane — a perfect hiding spot. On dragon trees (Dracaena marginata), the leaf stubs (persistent leaf bases) on older portions of the cane create additional sheltered attachment sites.
How to Fix It
- 1
Isolate from other houseplants.
- 2
Inspect all leaf bases and cane nodes. On corn plants, part the lower leaf bases from the cane — mealybugs will be in this hidden space. Use a flashlight.
- 3
Wet a cotton swab with 70% isopropyl alcohol and press it directly onto every colony you find at leaf bases, cane nodes, and exposed cane sections; go over the whole plant a second time afterward, since any colony missed in a wrapped-leaf pocket will simply rebuild the infestation.
- 4
Emulsify 2 teaspoons of neem oil into a quart of water with a little dish soap and spray the full plant, angling the nozzle up under the wrapped leaf bases and into the cane's stub scars where a swab alone tends to miss residual crawlers; repeat on a weekly cycle for 4–6 weeks.
- 5
If the soil shows white powder on root surfaces at the next repotting, root mealybugs are also present. Treat by rinsing roots and applying Bti drench, or repotting in fresh soil after root inspection.
Prevention
- Pull back lower leaf bases monthly and check the hidden zone between leaf and cane
- Quarantine new plants 3 weeks before introducing to your collection
- Monthly neem oil spray as a preventive measure during warm months
Quick Summary
| Plant | Dracaena (Dracaena fragrans (and related species)) |
|---|---|
| Category | Pests |
| Likely causes | Planococcus citri establishing at sheltered growing points |
| Fix steps | 5 steps — see above |