Rubber plant 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 Rubber plant (Ficus elastica), using what its sources say about pests and diseases, humidity and watering and 4 problems recorded for it.
Sources last read 14 September 2026.
Ficus elastica, the rubber fig, rubber bush, rubber tree, rubber plant, or Indian rubber bush, Indian rubber tree, or rambung is a species of flowering plant in the family Moraceae, native to eastern parts of South and Southeast Asia. Its common names reflect its historical use as a source of rubber within its native range, but it is not used in the modern commercial-scale production of natural rubber. Wikipedia, CC BY-SA 4.0
Native range: Nepal to China (W. Yunnan) and W. Malesia (wet tropical). Also sold as Assam rubber, caoutchouc, India rubber fig, India rubber plant, India rubber tree and Indian Rubber Plant.
What Rubber plant’s sources say that bears on this
- Pests and diseases
- Can be troubled by mealybugs, fern scale, Cuban laurel thrips and banded greenhouse thrips.NC State Extension · read 13 September 2026In a greenhouse, scale insects, mealybugs, thrips and greenhouse red spider mite can occur. Diseases: honey fungus can occur.RHS · read 13 September 2026
- Humidity
- ASHRAE recommends indoor relative humidity between 30% and 60%Penn State Extension · read 11 September 2026
- Watering
- Water regularly but avoid overwatering. Cut back watering overall while the plant is dormant (fall to late winter).NC State Extension · read 13 September 2026While growing, water moderately and feed monthly with a high nitrogen fertiliser; give little water in winter.RHS · read 13 September 2026
How this shows up on a Rubber plant
Fine pale speckling on the leaf blades, then webbing at the tips: spider mites
The leaf blades of the rubber plant 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: Where the damage starts. Mites stipple the whole leaf in fine dots; sun scorch bleaches the side facing the window.
RHS · read 13 September 2026Silvery streaks with black specks on the leaf blades: thrips
The surface of the leaf blades of the rubber plant looks scraped and silvered, and slender insects smaller than a grain of rice run or jump when disturbed.
RHS lists thrips among the pests it may attract. They feed on leaves and in flowers, and hide in buds, which makes them hard to spot.
Telling it apart: Whether the marks are silver. Thrips leave a sheen; sun scorch leaves dry, bleached tissue.
RHS · read 13 September 2026Sticky leaf blades and white fluff where they meet the stem: mealybugs
Clusters of white wax sit where each leaf blade joins the stem and along the undersides of the rubber plant. Lifted with a cotton swab, each tuft holds a soft, pale insect, and the leaf blades below are sticky.
RHS lists mealybugs among the pests it may attract. The wax keeps them dry and hard to reach, so they multiply in the sheltered joints of the vine.
Telling it apart: Whether the white comes with stickiness. Mealybugs leave honeydew; dust and mildew do not.
RHS · read 13 September 2026Sticky leaves and immobile shell-like insects on the stems
The rubber plant is sticky to the touch and yellows slowly. Along the veins on the undersides sit small shell-like scales that lift off with a fingernail.
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: Stickiness below the bumps. Scale drips honeydew; a leaf spot is dry.
RHS · read 13 September 2026Possible causes, likeliest first for a Rubber plant
Most likely spider mites
Ranked higher because Rubber plant's recorded problems point this way.
- Fine pale speckling on the leaf blades, then webbing at the tips: 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 rubber plant 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 mealybugs
Ranked higher because Rubber plant's recorded problems point this way.
- Sticky leaf blades and white fluff where they meet the stem: mealybugs RHS
Why: Mealybugs are soft insects that cover themselves in white wax, which gives the cottony look.
What to try:
- Move the rubber plant 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.
Most likely scale insects
Ranked higher because Rubber plant's recorded problems point this way.
- Sticky leaves and immobile shell-like insects on the stems RHS
Why: Scale insects settle in one place under a hard or waxy shell and feed on sap.
What to try:
- Move the rubber plant 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 rubber plant does not move.
Less likely for a Rubber plant, still possible
Questions
- What usually causes pests on a Rubber plant?
- For Rubber plant: spider mites, mealybugs and scale insects.
- How can I tell which one it is on my Rubber plant?
- 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 Rubber plant's sources say about its pests and diseases?
- NC State Extension: Can be troubled by mealybugs, fern scale, Cuban laurel thrips and banded greenhouse thrips. RHS: In a greenhouse, scale insects, mealybugs, thrips and greenhouse red spider mite can occur. Diseases: honey fungus can occur.
- What does this look like on a Rubber plant?
- The leaf blades of the rubber plant lose their shine and fill with tiny pale dots. In a heavy infestation fine webbing strings across the shoot tips. Telling it apart: Where the damage starts. Mites stipple the whole leaf in fine dots; sun scorch bleaches the side facing the window.
Other plants that show pests
Creeping figFine pale speckling on the leaf blades, then webbing at the tips: spider mites
Fiddle-leaf figFine pale speckling on the leaf blades, then webbing at the tips: spider mites
AlocasiaFine pale speckling on the leaves, then webbing at the tips: spider mites
Aloe veraSticky leaves and immobile shell-like insects on the stems
Areca palmDull, finely mottled fronds and faint webs: spider mites
Arrowhead plantCurled, sticky new leaf blades with green or black insects: aphids
Something else wrong with the Rubber plant?
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.