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Rough chervil · Chaerophyllum temulum

What are these pests on my rough chervil?

Pests are less common on rough chervil, but the plant can occasionally struggle with powdery mildew during dry spells. Check the leaves for white, dusty patches to identify if this fungal issue is present.

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

Check these first

  1. Inspect the undersides of the leaves.
  2. Look for white powdery patches on the leaf surface.
  3. Check for sticky residue on the stems.

Likely causes

  1. Powdery Mildew

    Most likely

    How to tell: White, flour-like spots appear on the surface of the leaves. It spreads quickly during periods of low humidity.

    What to do: Improve air circulation around the plant immediately. You can wipe the leaves with a damp cloth or use a mild neem oil spray.

  2. Aphids

    Possible

    How to tell: Small, soft-bodied insects cluster on the undersides of leaves or on new stems. You might see sticky residue on the foliage.

    What to do: Wash the leaves gently with a stream of water to dislodge the pests. Apply insecticidal soap if the infestation persists.

Pests on other plants

Find out what's wrong with your rough chervil

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

Small numbers of pests can be managed easily. Worry if the leaves begin to curl or if the plant stops growing entirely.

Stopping it coming back

Keep the plant healthy with proper watering and ensure it has good airflow to prevent fungal growth.

Rough chervil: pests? Check yours with a photo

Every plant is a little different. Take a photo of your rough chervil 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

Is powdery mildew harmful?
It can weaken the plant and make it look unsightly. Treating it early prevents it from spreading to other parts of the plant.
How do I stop pests from coming back?
Regularly inspect your plant and keep it in a well-ventilated area. Avoid overcrowding your plants to ensure good airflow.

Guides to these causes

More problems with Rough chervil

Back to the Rough chervil 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.