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Jatropha

Why are there white fuzzy spots on my Jatropha?

If you see small white cottony clumps on your Jatropha, you likely have mealybugs. These pests love to hide in the nooks where leaves meet the stems. Check the undersides of your leaves first.

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

Check these first

  1. Inspect the leaf undersides and stem joints for white fuzz.
  2. Check for sticky residue on the leaves or nearby surfaces.
  3. Look for tiny brown bumps along the main branches.

Likely causes

  1. Mealybug infestation

    Most likely

    How to tell: You will see white, waxy, cottony masses clustered on the stems or leaf joints. The leaves may also look sticky or start to yellow.

    What to do: Dab the bugs with a cotton swab dipped in rubbing alcohol to kill them on contact. For larger infestations, spray the entire plant with insecticidal soap every 7 days until they are gone.

  2. Scale insects

    Possible

    How to tell: These look like small, hard brown bumps that do not move and are often found on stems. They suck sap and weaken the plant over time.

    What to do: Scrape the bumps off gently with your fingernail or a soft brush. Apply neem oil to the affected areas once a week to prevent new ones from settling.

Find out what's wrong with your jatropha

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

If the plant is covered in sticky honeydew or leaves are dropping rapidly, act immediately. A few isolated bugs are easy to manage if caught early.

Stopping it coming back

Wipe down your leaves with a damp cloth every month to remove dust and spot pests early. Keep your plant away from new plants until you are sure they are bug free.

Keep your jatropha healthy from here

Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked. Identification and a health check are free.

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Questions people ask

Can I use dish soap to kill these bugs?
Yes, but use a mild, non-detergent soap mixed with water. Avoid heavy degreasers that can burn the foliage.
Will these bugs spread to my other plants?
Absolutely. Mealybugs move easily between plants, so isolate your Jatropha until it is completely clean.

More problems with Jatropha

Back to the Jatropha guide

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