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Wych elm · Ulmus glabra

What pests are attacking my Wych elm?

Pests can cause significant damage to your Wych elm if left unchecked. Look closely at the leaves and bark to identify the culprit early.

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pests on a plant
Photo: Jules Verne Times Two, CC BY-SA 4.0

Check these first

  1. Examine the trunk for small exit holes.
  2. Check the undersides of leaves for clusters of insects.
  3. Look for sticky residue on the foliage.

Likely causes

  1. Elm Bark Beetles

    Most likely

    How to tell: Small holes in the bark and galleries or tunnels visible if you peel back a small section of dead bark.

    What to do: Remove and destroy any infested wood immediately to stop the spread. Consult an arborist about preventative treatments for nearby healthy trees.

  2. Aphids

    Possible

    How to tell: Sticky honeydew on the leaves and small green or black insects clustered on new growth.

    What to do: Spray the leaves with a strong stream of water to knock them off. If the infestation is heavy, use an insecticidal soap.

Pests on other plants

Find out what's wrong with your wych elm

The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.

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When to worry

Bark beetles are a major concern because they carry disease. Aphids are generally a nuisance but rarely kill a mature tree.

Stopping it coming back

Keep your tree vigorous with proper watering and avoid wounding the trunk with lawn equipment.

Wych elm: pests? Check yours with a photo

Every plant is a little different. Take a photo of your wych elm and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.

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Questions people ask

Are these bugs going to kill my tree?
Bark beetles can, but aphids usually just cause cosmetic damage. Identify the pest correctly first.
Can I use chemical sprays?
Only use chemicals if recommended by a professional arborist, as they can harm beneficial insects.

Guides to these causes

More problems with Wych elm

Back to the Wych elm guide

This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.