Brown rot, caused by the fungi Monolinia fructicola and Monolinia laxa, is the most serious disease in plums, tart cherries, and apricots. This disease damages shoots, twigs and fruit. During ripening and in storage after harvest, brown rot can spread quickly from one fruit to another until most of the fruit are inedible.
Brown rot can also cause twig blight when cankers form on small branches.
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