Trees & Shrubs

Common Tree and Shrub Problems


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Powdery Mildew

A fungus disease that forms a white or gray “powder” on the outside of the leaves, which is composed of fungal strands and
spores. Common plants affected are: Rhaphiolepis, Crape Myrtles, Sycamores, Viburnum, and Edonymus.

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Leaf Spot

There are thousands of leaf spotting fungi or bacteria, most of which cause only cosmetic damage. Leaf spotting bacteria
is usually spread by splashing water or contaminated hands or tools. Leaf spot is more severe in mild, wet conditions. Common
plants affected are: Camellias, Dogwoods, and Roses.



Anthracnose is a form of fungi that spreads in spring from splashing raindrops and wind. Infected trees will have dry scorched
leaves and trees will prematurely lose their leaves. Common trees affected are: Ash, Sycamores and Oaks.


Most rusts produce rust colored or brown powdery pustules on leaves. Diseased plants are usually weak and stunted. Severely
infected plants may die. Common plants affected are: Roses.

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Black Spot

Black Spot is a form of Leaf Spot that usually affects roses and some varieties of Pear trees. Common plants affected are: Pears
and Roses.

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