Expert Problem Solver

Black Rot

Black Rot
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Black rot of trees and shrubs, causes cankers, localized diseased areas, which vary in size from a few inches to several feet. The rough, pimple-like structures on the surface of the canker are the fruiting bodies of the fungus. These fruiting bodies contain spores which spread the disease.
Black rot care includes removal and disposal of cankered limbs and dead branches. Dispose of fallen plant debris at the end of the season. Stress can predispose trees to infection, so keep shrubs growing vigorously by properly watering, fertilize, and mulch trees. Avoid injury to the trunk caused by lawn mowers, or animals.