Sunday, May 10, 2009

Landscape - Spot Anthracnose on Dogwood.

The following is information on spot anthracnose of Dogwood. You may see this disease on dogwoods in flower at this time.

SPOT ANTHRACNOSE on the petals (bracts) of flowering dogwood was identified on a sample from Sussex County. This fungus produces very small (1/8 in.) spots with purple red borders. Spots can be numerous and during wet weather spread to leaves. This disease is mostly cosmetic but can be controlled with Daconil (chlorothalonil), myclobutanil (Eagle, Immunox), Heritage, Cleary's 3336 (thiophanate-methyl) and other labeled fungicides.

Spot anthracnose on dogwood flower petals. Photo from the Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services,

Information from Bob Mulrooney, Extension Plant Pathologist, UD

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