Pocket Botanist
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Check these first
- Inspect the undersides of the leaves for small bumps.
- Check the leaf joints for white, cottony webbing.
- Wipe the leaves with a damp cloth to see if the spots come off.
Likely causes
Scale Insects
Most likelyHow to tell: You will see small, brown or tan bumps that look like tiny shells attached to the leaves or stems. They do not move and often leave behind a sticky residue called honeydew.
What to do: Gently scrape the insects off with your fingernail or a soft cloth dipped in rubbing alcohol. For larger infestations, spray the entire plant with neem oil or insecticidal soap every 7 days until they are gone.
Mealybugs
PossibleHow to tell: These look like tiny bits of white cotton tucked into the crevices of your plant. They cluster where the leaves meet the main stem.
What to do: Dab the white spots with a cotton swab soaked in rubbing alcohol to kill them on contact. Keep the plant isolated from others to prevent the bugs from spreading.
Find out what's wrong with your spineless yucca
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.
Scan with your phone's camera to get the app
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When to worry
It is serious if the leaves start turning yellow or dropping because the plant is losing too much energy. A few isolated bumps are easy to manage if you catch them early.
Stopping it coming back
Keep your yucca healthy by providing bright light and avoiding overwatering, as stressed plants are more attractive to pests. Regularly inspect your plant whenever you water it.
Spineless Yucca: pests? Check yours with a photo
Every plant is a little different. Take a photo of your spineless yucca 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.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
Get the app · Or check it from a photo now, free
Questions people ask
- Can I use dish soap to kill these bugs?
- Yes, you can mix a teaspoon of mild dish soap with a quart of water. Just make sure it does not contain degreasers or harsh chemicals that could burn the leaves.
- Will these bugs kill my yucca?
- Not immediately, but a heavy infestation will drain the plant of nutrients and cause it to decline. Treat it as soon as you notice the first bump.
Guides to these causes
More problems with Spineless Yucca
Back to the Spineless Yucca 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.