Fung-onil/ chlorothalonil

I used Fung-onil for two consecutive years on my few in ground Nectarines,against PLC and it didn’t help much.
I switched this year to Liqui-Cop RTS(Ready To Spray).I didn’t want to hook a hose to the bottle,but rather poured about 6 tablespoons of it into a gallon of water and applied about 3 times during the dormant season.That hasn’t worked too well either,as a Fantasia has quite a bit of leaf curl on the tips.It was probably in part due to the wettest off season on record.
Maybe it’s also the spreader sticker,Southern AG.I may try Nufilm next year and up the dosage of the Copper.
It will be a good time when I can get the PLC reduced or eliminated. Brady