Have it. It was discovered in the next town over from me on Avalon Way in Redmond Wa. It was a compost pile discovery. It still gets curl. Just not bad enough to die.
Every peach or nectarine in my yard is on the coveted “curl resistance” list as advertised. My take 8 years later is that they all get curl. Some just get it less on years we have too wet of springs during peach blossoms. They just recover and grow on w new leaves. The ones that cannot take the curl just die after repeated hard defoliation. If it’s a bad (wet @ bloom) year still no fruit. On a good year you get decent fruit.
Spraying can tip the scale in your favor. I am not opposed to doing a copper spray if I lived a block over. There are several threads on here for alternative sprays.
But my trees are a few feet up from a salmon spawning stream that bisects my lot. And I have seen first hand how bad copper is for fish. My business is installing custom built aquariums and selling rare tropical fish and plants. It amazing how copper kills a lot aquarium fish eggs and is like a nuke to all the micro fauna and snails in an aquarium. I don’t want to be overspraying and dripping copper into the salmon stream.
Here is what the owner of raintree nursery said about curl on this forum.
We do list it as PLC resistant, but I would agree that it’s more susceptible than other varieties.
Here is my personal take on it.
Your microclimate will determine this, 100%. When it comes to the PNW and peaches/nectarines, a few degrees either way, moisture on a certain day, wind, and direct sun. We have people 100’ lower in elevation less than a mile away whose results will differ on PLC in a given year.
In some years, you hit it just fine. Other years, even Frost (still the most resistant here at Raintree) will get it pretty bad.
We don’t spray unless we absolutely need to, but I know it would be more consistent if we did.