Presently it has probably progressed to far but you can try Immunox, or sulfur spray or both 7-10 day intervals.
For next year
home fruit spray schedule I have been using this schedule for the last few years and unless it is a very wet spring/summer have few issues. Before implementing this I had all kinds of issues. The streptomycin spray and timing is important with apples and pears.
My biggest problem now are the deer. They eat everything I grow. 4 apples, 7 peach, 1 plum, 1 cherry, 2 fig trees, 50' blackberry, 50' strawberry.
This winter I am going to put up a 10' fence around the orchard. And me and the wife will fill our deer tags right here at home.
