This looks like Shothole, a very common fungal disease of peaches in Western Oregon. Infection can occur from spring through fall. Spots on leaves first appear as small red spots that will then turn purple with a tan-white center. Eventually the center of the spot may fall out, leaving a shot hole like appearance. To prevent the fungus, do not use overhead irrigation that wets the canopy of the tree. Use drip or micro sprinklers. When pruning during the dormant season, remove infected twigs if practical. Spray a copper fungicide two times, the first time at about 50% leaf fall, and the second time in the dormant season (before January 15th). You can find more information about the fungal disease here: https://pnwhandbooks.org/plantdisease/host-disease/peach-prunus-persica-shothole. I also recommend this OSU Extension publication Managing Diseases and Insects in the Home Orchard (https://catalog.extension.oregonstate.edu/ec631) which you can download or view for free online.

On Monday, August 29, 2022, 2:09 PM, Ask Extension <<personal data hidden>> wrote: