The Q&A Archives: Plum Problem

Question: The first plum on my tree-variety unknown-was perfect. Now the plums seem to have spots of thin or missing skin.I thought birds but don't see peck or bite marks, just skinless spots on soft ripe fruit. What could be causing this? I fertilized right after the first plum and water every 3-4 days. Thanks!

Answer: I think there was a pollination problem with your plum tree. Incomplete pollination will result in malformed fruit. I can't really tell if it was an insect problem when the tree was in flower, or some chemical damage (if you sprayed your tree) or a disease problem of some sort. I can only suggest you take a few of the affected fruits into your local cooperative extension office so trained staff can dissect the fruits and determine the cause. Contact University of California Cooperative Extension, 1045 Arlington Drive, Costa Mesa, CA 92626, phone 714-708-1606. Good luck with your plum tree!

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