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Eve's Pin Cactus · Austrocylindropuntia subulata

Why are there white fuzzy spots on my Eve's Pin Cactus?

Those little white cottony patches are likely mealybugs, which love to hide in the crevices of your cactus. Check the base of the spines and the joints of the stems first.

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

Check these first

  1. Inspect the stem joints for white cottony webbing.
  2. Check under the spines for tiny moving insects.
  3. Look for sticky honeydew residue on the surface of the cactus.

Likely causes

  1. Mealybug infestation

    Most likely

    How to tell: You will see white, waxy, cottony masses clustered in the stem joints or around the spines.

    What to do: Dab the bugs with a cotton swab dipped in 70 percent isopropyl alcohol to kill them on contact. Repeat this process every 5 to 7 days until you see no more signs of the pests.

  2. Scale insects

    Possible

    How to tell: These look like small, hard brown bumps that do not move and are often mistaken for part of the plant.

    What to do: Gently scrape the bumps off with a soft toothbrush or fingernail. Wipe the area with a cloth soaked in mild soapy water to remove any residue.

Pests on other plants

Find out what's wrong with your eve's pin cactus

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 infestation covers the entire plant and the cactus starts to look shriveled, it is in serious trouble. A few isolated bugs are easy to manage if you catch them early.

Stopping it coming back

Keep your cactus in a well ventilated area and inspect it closely every time you water. Avoid over fertilizing, as soft new growth attracts these pests.

Eve's Pin Cactus: pests? Check yours with a photo

Every plant is a little different. Take a photo of your eve's pin cactus 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

Can I use neem oil?
Yes, neem oil is effective, but apply it in the evening to avoid burning the plant in direct sun. Do not use it if the plant is already stressed.
Will these bugs kill my cactus?
If left untreated, they will drain the plant of sap and weaken it significantly. This makes the cactus prone to secondary infections.

Guides to these causes

More problems with Eve's Pin Cactus

Back to the Eve's Pin Cactus 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.