My sand cherry leaves are losing their color and look transparent in splotches. I have never had this problem before.

Question

They are well established and have never done this before. It isn’t all the leaves yet so I would like to treat it if possible. I have searched the internet with no results. Thank you for any help you can provide.

Answer 1

This could be due to an insect pest scarifying and skeletonizing the leaves, "cherry slug" is the larva of a sawfly, and Japanese beetles do this.

Neem Oil is a good treatment for mosts pests.

https://www.gardeningknowhow.com/plant-problems/pests/pesticides/neem-oil-uses.htm