This is a precious sabal minor: Given to me as a Mother's Day gift in 2006. It was my largest sabal minor. It was fine and healthy until that one day.
Since there are funguses, bugs and bacteria that can attack palms, I was very concerned. I looked for all the signs and symptoms and could find none.
No where did I read anything that said, "Check for rhinoceros beetles". If I had, damage to other palms may have been avoided.
However, because of this, I started watching my other palms like a hawk.