Dirt falling off a palm tree

Question

Hello. I have a palm tree 15 meters height. I think it’s the Washingtonia Filifera. There is some black and white “dirt” falling off this tree. I am not sure if this is normal or there is some kind of disease. Could you help me? Thanks a lot.

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Answer 1

This appears to be sand, rocks, and debris that have blown into the tree. This is normal for an area that has windy conditions or lots of rocks or dust. This can include construction areas or disturbed areas. I would say that it does not pose any threat to the health of the palm.