Timing Treatment
Dormancy delayed dormant (early spring) Foliar copper sprays.
Petal fall
Shuck split
FireLine17WP when conditions favor disease.
Post-bloom
(mid summer) 
FireLine17WPat weekly intervals as disease conditions warrant. Consider alternating or tank mixing with copper based products. Note: certain liquid copper formulations may be incompatible with FireLine 17.
Post harvestdormancy
(late fall – winter)
Pruning to remove overwintering of cankers from trees.

Note: Check with your local extension agent and/or Pest Control Advisor for specific recommendations.