- 1). Treat twig blight, which causes leaf drop and dead branches, by removing and discarding dead stems. As you cut through the wood, dip your shears in a solution of one part bleach and nine parts water to prevent infection of healthy tissue.
- 2). Uproot shrubs affected by mushroom root rot to stop the disease from spreading to other bushes. Remove and discard the diseased shrubs' stumps and roots.
- 3). Eliminate fungi that cause leaf spots in shrubs by applying a fungicide that contains chlorothalonil, fixed coppers, mancozeb, maneb or zineb. Spray the plant in early spring as the leaves are unfurling out of the buds. Repeat the treatment one to two weeks later.
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