Aug 26, 2014 - 07:41 AM
This fungus occurs in the spring and the greatest damage to leaves occurs by late summer. By that time, it is impossible to make the leaves turn "perfect again". The infested leaves fall to the ground and serve as a reservoir for next years "regrowth" of the fungus.
Treating the tree at such a late stage will not provide any good results for this year. Removing infested leaves and controlling the conditions at the ground level may help provide better control for next year.
Here is a good article on this - http://www.na.fs.fed.us/spfo/pubs/how...
This product is not labeled for use on fruit or nut bearing trees. That is why the directions / label omit any reference to that application.