Spider Mites on Bird of Paradise — Stippling on the Large Leaf Surface
Bird of Paradise (Strelitzia reginae)
Symptoms
- pale or silver stippling — tiny white dots — on the upper surface of leaves
- fine webbing visible on the underside of leaves, particularly along the midrib
- leaves developing a dull, dusty appearance instead of the normal glossy blue-green sheen
- tiny moving specks visible on the underside of leaves under magnification
- stippling starting on older leaves and progressing to newer growth as population grows
Causes
Tetranychus urticae thriving in warm, dry indoor air
Spider mites are arachnids, not insects, and they reproduce explosively in the warm, dry conditions common in centrally-heated homes. Bird of Paradise, which tolerates low humidity better than many houseplants, is therefore kept in conditions that suit mites extremely well. The large, smooth leaf surface of Strelitzia provides an ideal feeding area. Each mite pierces individual leaf cells to extract cell contents, leaving behind the characteristic white stipple marks. In moderate infestations, the lower leaf surface will show the first webbing; as populations increase, webbing appears on upper surfaces and spans from leaf to leaf.
How to Fix It
- 1
Move the plant to a shower stall or a sheltered outdoor spot and hose down every leaf with a firm stream of water, then follow up leaf by leaf with a damp cloth — the individual leaves are large enough on this plant that hand-wiping each one is genuinely practical and removes mites a spray alone would leave behind.
- 2
Mix 1 teaspoon of castile soap per quart of water and coat every leaf surface, working the solution well into the undersides where the colony concentrates; because soap only kills mites it directly touches, plan on repeating this every 5–7 days for 3–4 rounds rather than expecting one application to finish the job.
- 3
After the soap rounds finish, mix an emulsified neem solution at 2 teaspoons per quart and coat the same large paddle-shaped leaves top and bottom — the size of this plant's foliage means a spray bottle alone often can't build enough coverage, so a soft cloth wipe-down works better for the biggest leaves.
- 4
Increase ambient humidity around the plant during the outbreak. A humidifier or pebble tray with water positioned near the plant creates less favorable conditions for mite reproduction.
Prevention
- Wipe leaves monthly with a damp cloth — physical removal before populations can establish
- Inspect undersides of leaves with a magnifying glass monthly, particularly in winter when heating dries indoor air
- Maintain moderate humidity around the plant even though Strelitzia tolerates dry air
Quick Summary
| Plant | Bird of Paradise (Strelitzia reginae) |
|---|---|
| Category | Pests |
| Likely causes | Tetranychus urticae thriving in warm, dry indoor air |
| Fix steps | 4 steps — see above |