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Ornamental Pineapple · Ananas comosus var. bracteatus 'Variegatus'

Why are there white cottony spots on my ornamental pineapple?

Seeing small, white, fuzzy patches on your ornamental pineapple usually means you have a mealybug infestation. These pests love to hide deep in the leaf axils where the leaves meet the stem. Check those tight spaces first to confirm their presence.

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

Check these first

  1. Inspect the base of each leaf where it attaches to the central stem.
  2. Check the undersides of the leaves for any sticky residue.
  3. Look for tiny white specks moving slowly along the foliage.

Likely causes

  1. Mealybugs

    Most likely

    How to tell: You will see white, cottony masses that look like bits of lint tucked into the base of the leaves. The leaves may also feel sticky to the touch due to the honeydew these bugs leave behind.

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

  2. Scale insects

    Possible

    How to tell: These appear as small, hard, brown bumps on the leaves or stems that do not move. They often look like tiny scabs on the plant surface.

    What to do: Gently scrape the bumps off with your fingernail or a soft brush. Follow up by wiping the leaves with a damp cloth soaked in mild soapy water.

Pests on other plants

Find out what's wrong with your ornamental pineapple

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 residue or the leaves are starting to yellow and drop, the infestation is severe. A few isolated bugs are easy to manage if caught early.

Stopping it coming back

Wipe your plant leaves down with a damp cloth every month to remove dust and check for early signs of pests. Keep new plants isolated for 2 weeks before placing them near your pineapple.

Ornamental Pineapple: pests? Check yours with a photo

Every plant is a little different. Take a photo of your ornamental pineapple 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 just wash the bugs off with water?
A strong spray of water can dislodge some bugs, but it rarely removes them all. You will likely need to follow up with alcohol or insecticidal soap to ensure they are fully eliminated.
Will these bugs spread to my other plants?
Yes, mealybugs move between plants easily. Move your pineapple away from your other houseplants until you are sure the infestation is cleared.

Guides to these causes

More problems with Ornamental Pineapple

Back to the Ornamental Pineapple 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.