Brown rot can be just as damaging to cherries, nectarines and other stone fruits.
Symptoms Brown rot usually first appears during bloom. The blossom clusters wilt and turn brown. If wet weather prevails during bloom the diseased blossom cluster becomes covered with a gray spore mass of the fungus. About two weeks after bloom, the infection will have progressed down the flower stalk into the twigs and branches of the tree. Twigs infected in this way quickly wither causing a die-back of the young terminal shoots.