2.  Brown Rot
The blossoms and young leaves wilt, decay, and turn brown during the first 2 weeks of the bloom period. Often the decayed blossoms and leaves fail to drop, and may hang on the tree throughout the growing season. In humid conditions, masses of gray spores may appear on the infected flower parts. There is often extensive twig dieback. Sunken lesions (cankers) may develop on the twigs and branches as the season progresses; a thick gummy material often oozes from these cankers.