Lady palm pests, webbing or sticky leaves: causes and what to do
6 results in the diagnosis tree begin with pests, 5 of them marked likely when the answers fit. They are ordered here for Lady palm (Rhapis excelsa), using what its sources say about pests and diseases, humidity and watering and 4 problems recorded for it.
Sources last read 14 September 2026.
Rhapis excelsa, also known as broadleaf lady palm or bamboo palm, is a species of fan palm in the genus Rhapis. It is native to southern China and northern Vietnam. Wikipedia, CC BY-SA 4.0
Native range: China (Guangdong) to NC. Vietnam (wet tropical). Also sold as Bamboo Palm, Braodleaf Lady Palm, Fan Tufted Palm, fern rhapis, ground rattan cane and Japanese peace palm.
What Lady palm’s sources say that bears on this
- Pests and diseases
- Can be troubled by fern scale, banded greenhouse thrips, greenhouse thrips and root mealybugs.NC State Extension · read 13 September 2026Can be troubled by scale insects and greenhouse red spider mite. Diseases: usually none.RHS · read 13 September 2026
- Humidity
- ASHRAE recommends indoor relative humidity between 30% and 60%Penn State Extension · read 13 September 2026
- Watering
- Use well-drained potting soil and water regularly, cutting back in winter.NC State Extension · read 13 September 2026In the growing season, water generously and feed monthly with a balanced liquid fertiliser. Give little water in winter.RHS · read 13 September 2026
How this shows up on a Lady palm
Dull, finely mottled fronds and faint webs: spider mites
The fronds of the lady palm lose their shine and fill with tiny pale dots. In a heavy infestation fine webbing strings across the shoot tips.
RHS lists spider mites among the pests it may attract. They feed from the underside, so the damage shows on top long before the mites are noticed.
Telling it apart: Webbing. Only mites spin fine silk at the shoot tips.
RHS · read 13 September 2026Silvery patches dotted with tiny black spots: thrips
Patches of the lady palm turn silver-gray, with black specks of excrement, and new growth may be scarred.
NC State Extension lists thrips among the pests it may attract. They rasp the surface cells and drink the contents, which leaves the silvered, empty tissue.
Telling it apart: Whether the marks are silver. Thrips leave a sheen; sun scorch leaves dry, bleached tissue.
NC State Extension · read 13 September 2026Small raised bumps along the stems and veins, with sticky fronds: scale insects
Flat or domed bumps, tan to dark, line the stems and the midribs of the lady palm. They do not move, and the fronds beneath them are sticky or dusted black.
RHS lists scale insects among the pests it may attract. The shell protects the insect, so it survives a wipe that would clear aphids and keeps feeding.
Telling it apart: Flick a bump with a fingernail. Scale comes away and leaves a mark; a natural bump on the stem does not move.
RHS · read 13 September 2026Wilting with white, waxy patches on the root ball: a root pest
The lady palm stops growing and droops between waterings. Slid out of its pot, the root ball shows white, powdery patches on the roots and on the inside of the pot.
NC State Extension names root mealybugs for this plant. Feeding below the surface cuts the water supply, and the fronds show it as wilting.
Telling it apart: Take the plant out of its pot. White waxy specks that smear are root mealybugs; fine white threads that do not are fungal growth.
NC State Extension · read 13 September 2026Possible causes, likeliest first for a Lady palm
Most likely spider mites
Ranked higher because Lady palm's recorded problems point this way.
- Dull, finely mottled fronds and faint webs: spider mites RHS
Why: Spider mites feed on individual leaf cells, and each emptied cell shows as a pale speck.
What to try:
- Move the lady palm away from other plants.
- Wash the leaves, top and underside, with a strong spray of water in a shower or sink.
What would settle it: Hold a sheet of white paper under a leaf and tap the leaf. Tiny specks that move across the paper are mites.
Most likely scale insects
Ranked higher because Lady palm's recorded problems point this way.
- Small raised bumps along the stems and veins, with sticky fronds: scale insects RHS
Why: Scale insects settle in one place under a hard or waxy shell and feed on sap.
What to try:
- Move the lady palm away from other plants.
- Scrape the scales off with a fingernail or a soft brush, then wipe the stems and leaves.
What would settle it: Push a bump gently with a fingernail. Scale comes away and leaves a mark; a bump that is part of the lady palm does not move.
Most likely mealybugs
Why: Mealybugs are soft insects that cover themselves in white wax, which gives the cottony look.
What to try:
- Move the lady palm away from other plants.
- Wipe off every insect you can see with a cotton swab dipped in rubbing alcohol, testing a single leaf first.
What would settle it: Touch a tuft with a cotton swab. If a small, pale, oval insect is underneath, it is a mealybug.
Less likely for a Lady palm, still possible
Questions
- What usually causes pests on a Lady palm?
- For Lady palm: spider mites, scale insects and mealybugs.
- How can I tell which one it is on my Lady palm?
- What can you see? Fine webbing, and tiny pale speckles on the leaves; White, cottony tufts in the leaf joints; Small brown or pale bumps on stems and leaves that do not move; Clusters of small, soft insects on the new growth; Tiny dark flies around the soil; Sticky, shiny residue, but no insect I can see.
- What do Lady palm's sources say about its pests and diseases?
- NC State Extension: Can be troubled by fern scale, banded greenhouse thrips, greenhouse thrips and root mealybugs. RHS: Can be troubled by scale insects and greenhouse red spider mite. Diseases: usually none.
- What does this look like on a Lady palm?
- The fronds of the lady palm lose their shine and fill with tiny pale dots. In a heavy infestation fine webbing strings across the shoot tips. Telling it apart: Webbing. Only mites spin fine silk at the shoot tips.
Other plants that show pests
Areca palmDull, finely mottled fronds and faint webs: spider mites
Chusan palmSticky leaves and immobile shell-like insects on the stems
Kentia palmA black, sooty film on sticky leaves
Parlor palmDull, finely mottled fronds and faint webs: spider mites
Pygmy date palmFine pale speckling on the fronds, then webbing at the tips: spider mites
AlocasiaFine pale speckling on the leaves, then webbing at the tips: spider mites
Something else wrong with the Lady palm?
What this does not cover
This page orders a decision tree's results using a plant's sourced care. It has not seen your plant, its pot or its window, and two problems at once are common: that is the usual reason a confident answer turns out wrong. The questions in the diagnosis tool narrow it further than a list can.