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Hyacinth Plant

Q.How to treat white clumps of powder on majestic palms

Zone 36330 | maryrossi added on July 12, 2017 | Answered

My 3 majestic palms all have clumps of white powder on them … it happened quickly, and is worse on one. They were outdoors on a hot but mostly sun-free deck for a few months and are now all inside.

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Downtoearthdigs
Answered on July 15, 2017

This sounds like a Scale pest issue.
The plants should be treated with Neem Oil.
I would isolate the palm from other plants.

https://www.gardeningknowhow.com/ornamental/trees/sago-palm/white-spots-on-sago.htm

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