Grapes infected with black rot turn brown, then harden into small, black, mummified berries. Brown rot of stone fruits causes whole fruit to turn brown and soft. Control fruit rots by planting resistant cultivars, removing and destroying infected fruit, and pruning to increase air movement. Applying compost tea or Bacillus subtilis may help prevent the disease from developing. Sulfur sprays throughout the season can be effective, too, as a last resort.