small clear modules on plums.

Question

When picking Victoria plums, I noticed very small clear modules on the surface in a bunch. They do pick off easily and don’t seem to leave any clues of how they got there. I could send photos if needed.

Answer 1

They have peach borers, likely. They can affect any stone fruit. This article will explain more and help:
https://www.gardeningknowhow.com/edible/fruits/peach/peach-tree-borer.htm