The fungus lives in the soil over the winter so you will need to remove all leaf materials within a 30 foot radius just to be sure you get as much as possible.
Next you want to use a good batch of
compost tea to soak that cleared area, this should put enough good microorganisms into the soil to eradicate the fungus, also spray the tree trunk and all branches.
If in doubt, do multiple soakings with your good, aerated compost tea, saving the fungicide as the last resort (early spring).
It's also a good idea to get rid of any junipers growing on your land that are in the wind direction of the fruit trees, that's the intermediate carrier of this disease.
Redhawk