Q.Foxtail Palms
my palms have started getting slits at the bottom of the trunk, is this treatable? if so your best recommendation please. Hopefully they are not diseased
Certified GKH Gardening Expert
Unfortunately, your photos did not come through. I am unable to see the issue at hand. Be sure that these are not the segment where the old fronds have fallen off of. This will create "rings" or "slits" at the base.
Otherwise, there are many diseases that could be affecting the tree. These articles will help:
https://www.gardeningknowhow.com/ornamental/trees/foxtail-palm/foxtail-palm-diseases.htm
https://www.gardeningknowhow.com/ornamental/trees/foxtail-palm/foxtail-palm-tree.htm
You can obtain help with testing through your local extension service: