Early bloom blight results in a wilting and collapse of blossom tissue. The disease can move into twigs and branches, resulting in sunken cankers, dieback, and gumming at canker sites. Byther, Ralph S., et al. To control brown rot, keep infected fruit and fallen leaves cleaned up. Do not mix insecticide with the fungicide, as this would kill the bees that pollinate the flowers.
Sanitary measures are important.
Standard control has been wettable sulfur sprays or sulfur dust. Westcott's Plant Disease Handbook . Rev. by R. Kenneth Horst. Van Nostrand Reinhold, 1990. A fungus disease that quickly spreads its spores through the garden, causing black spots on the leaves followed by yellowing and defoliation.