Elephant ear 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 Elephant ear (Colocasia esculenta), using what its sources say about pests and diseases, humidity and watering and 3 problems recorded for it.
Sources last read 14 September 2026.
Taro is a root vegetable. It is the most widely cultivated species of several plants in the family Araceae that are used as vegetables for their corms, leaves, stems and petioles. Wikipedia, CC BY-SA 4.0
Native range: India to S. China and Sumatera (wet tropical). Also sold as aivi, Arabian cocoa root, bleeding heart, Caladium, callaloo and coco yam.
What Elephant ear’s sources say that bears on this
- Pests and diseases
- Can be troubled by greenhouse whitefly, aphids 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
- During growth, water generously and feed monthly with a balanced liquid fertiliser.RHS · read 13 September 2026
How this shows up on an Elephant ear
Clusters of small soft insects on the shoot tips and buds: aphids
The youngest growth of the elephant ear is sticky and distorted, and a closer look finds colonies of small, pear-shaped insects.
RHS lists aphids among the pests it may attract. They favor tender tips and buds, so the damage concentrates where the plant is growing.
Telling it apart: What the white bits are. Aphids leave papery cast skins; mealybugs leave wax with an insect inside.
RHS · read 13 September 2026Dull, finely mottled leaves and faint webs: spider mites
Speckling spreads over the elephant ear until the leaves look washed out and bronze, with fine threads at the growing points.
RHS lists spider mites among the pests it may attract. Mites empty the leaf cells one by one, which is what the pale dots are, and they breed fastest in warm, dry air.
Telling it apart: Webbing. Only mites spin fine silk at the shoot tips.
RHS · read 13 September 2026Sticky, yellowing leaves and a cloud of white insects: whitefly
The leaves of the elephant ear yellow and grow sticky, sometimes dusted black, and white insects rest on the undersides.
RHS lists whitefly among the pests it may attract. Their honeydew is what makes the leaves sticky and lets a black film grow on them.
Telling it apart: What lives under the leaves. Whitefly young are flat, pale ovals; mealybugs are woolly.
RHS · read 13 September 2026Possible causes, likeliest first for an Elephant ear
Most likely spider mites
Ranked higher because Elephant ear's recorded problems point this way.
- Dull, finely mottled leaves 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 elephant ear 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 aphids
Ranked higher because Elephant ear's recorded problems point this way.
- Clusters of small soft insects on the shoot tips and buds: aphids RHS
Why: Aphids cluster on soft new growth and flower buds, where the sap is easiest to reach.
What to try:
- Rub them off with fingers, or rinse them off in a sink or shower.
- Repeat every few days while new ones appear.
What would settle it: Look for the pale shed skins among the insects. Aphids molt as they grow, and the skins are left behind in the colony.
Most likely mealybugs
Why: Mealybugs are soft insects that cover themselves in white wax, which gives the cottony look.
What to try:
- Move the elephant ear 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 an Elephant ear, still possible
Questions
- What usually causes pests on an Elephant ear?
- For Elephant ear: spider mites, aphids and mealybugs.
- How can I tell which one it is on my Elephant ear?
- 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 Elephant ear's sources say about its pests and diseases?
- RHS: Can be troubled by greenhouse whitefly, aphids and greenhouse red spider mite. Diseases: usually none.
- What does this look like on an Elephant ear?
- The youngest growth of the elephant ear is sticky and distorted, and a closer look finds colonies of small, pear-shaped insects. Telling it apart: What the white bits are. Aphids leave papery cast skins; mealybugs leave wax with an insect inside.
- Is Elephant ear safe to handle while I check it?
- Its sources list it as toxic to cats, dogs and people. Wash your hands after handling the roots or sap, and keep trimmings away from pets.
Other plants that show pests
AlocasiaFine pale speckling on the leaves, then webbing at the tips: spider mites
Arrowhead plantCurled, sticky new leaf blades with green or black insects: aphids
Dumb caneHard, rounded scale on the undersides of the leaves
Heartleaf philodendronPale stippled leaves and tiny moving dots underneath: a mite pest
Lacy tree philodendronFine pale speckling on the leaf blades, then webbing at the tips: spider mites
MonsteraDull, finely mottled leaf blades and faint webs: spider mites
Something else wrong with the Elephant ear?
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.