Question: what is eating the leaves on my plum?
Answer: Plum aphids are another common pest found on plum trees. Aptly names, as plum leaves are the pests' favorite food. These aphids are green, yellow or brown and under ½ inch in length. ... The curled leaves then do not photosynthesize properly, which stunts the tree and/or fruit and, in severe cases, will kill the tree.