@@teako1008 I didn’t use that I used potassium bicarbonate and just use the ratio on the container. It’s specifically a garden product and anti fungal.
Like rust and blight seem to be a soil issue, you would think leaf curl is too. Commercial people would add sulphur. Garlic adds sulphur to the soil. Stone fruit like ph 6-6.5. Maybe using lime and increasing ph is just making the issue worse every year. Like copper sulphate and lime mixes are at like ph 7, unless you use too much lime, but that will increase soil ph. Copper seems more bio available at lower ph too, so if soil ph is like neutral and not slightly acidic, the copper in the soil wont be effecting the leaf curl fungi. Maybe
I stopped spraying anything on my nectarine a couple years ago and let it be since it was quite bad. This year along with last year no to very little leaf curl.
