I think Pat hit it on the head. Plum curculio makes it almost impossible to
grow plums here without lots of spraying - dormant oils, spring oil with
diazinon, manzeb... If you don't, the opportunistic brown rot will destroy
the whole fruit, and the next, etc. You've seen the results. Consult your
extension agent for what is the best spray and timing for your area.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.