Orange tree problem

Question

On the bottom side of the leaves on my orange tree, there appears to be a substance that looks like guanulated sugar. What could that be? I have never see this on my tree before. Thank you.

Answer 1

This could be scale.

Here is a link with more information.

https://www.gardeningknowhow.com/edible/vegetables/squash/spaghetti-squash-ripeness.htm