western oregon is the major leagues for PLC, spray schedules that work everywhere else in the country are less effective here. the upside is, if you can beat PLC then you have a super dry summer and almost no further pests and disease, so the battle is over
I spray copper+nufilm, lime sulfur+oil (wilco carries lime sulfur and oil), and ziram+nufilm (keystone carries ziram) with the ziram timed as close as possible before bud break. sulfur and ziram have safety requirements that need some respect, but they’re among the best sprays. copper is less effective. see this old post especially the pacific northwest IPM website
I have six or seven genetic dwarf peaches and nectarines going into their 2nd/3rd year, in western oregon. they’ve done well for me, they grow about 1 foot/year (some have a lesser form of dwarfism and grow more). I let them bear ~5 peaches/tree in their first year and I’ll do about 15/tree this year. ask me in 2-3 months whether I beat PLC this spring… last year I had perfect control but it could be that it hasn’t spread to my backyard yet (the neighbors all have it). I did have two get pretty bad powdery mildew, if that becomes a trend they’ll get culled