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Mother of Thousands · Kalanchoe daigremontiana

What are these white spots on my Mexican Hat Plant?

Mealybugs are common pests that love to hide in the tight spaces of your Mexican Hat Plant. They look like tiny bits of white cotton and can quickly drain your plant of energy.

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

Check these first

  1. Look closely at the crevices where leaves meet the stem.
  2. Check the undersides of the leaves for tiny webs.
  3. Wipe a leaf with a white tissue to see if any bugs come off.

Likely causes

  1. Mealybugs

    Most likely

    How to tell: You see white, fuzzy, cottony masses in the leaf axils or along the stem.

    What to do: Dip a cotton swab in rubbing alcohol and touch it directly to the bugs to kill them on contact. Repeat this every few days until you no longer see any signs of them.

  2. Spider Mites

    Possible

    How to tell: The leaves look dusty or stippled with tiny yellow dots, and you might see fine webbing between the leaves.

    What to do: Wipe the leaves down with a damp cloth to remove the webbing and mites. Increase humidity slightly or use a gentle insecticidal soap spray.

Pests on other plants

Find out what's wrong with your mother of thousands

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 leaves start falling off, it is a serious situation. A few bugs are easy to manage if you act right away.

Stopping it coming back

Keep your plant clean by wiping the leaves occasionally. Inspect new plants carefully before placing them near your other succulents.

Mother of Thousands: pests? Check yours with a photo

Every plant is a little different. Take a photo of your mother of thousands 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

Will these bugs spread to my other plants?
Yes, they can move easily between plants. Isolate your Mexican Hat Plant until you are sure the pests are gone.
Can I use dish soap to kill them?
A very mild solution of water and a drop of dish soap can work, but rubbing alcohol is much more effective for mealybugs.

Guides to these causes

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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.