Hi, I have a cherry tree that has brown rot every year. This year is especially severe and I have a lot of fruit mummies. I will try to remove them but what fungicides are good to prevent brown rot? Also, I have a plum tree that has black knot disease. I recently removed a large branch that was covered by it but there is another branch beside it that also has early black knot on it. What should I do about it , remove it now or wait until winter? And are there fungicides out there that prevents black knot from spreading to other branches/trees?