Diseases in the Southeast U.S.
Caused by Discula fraxinea
Note the necrotic leaflets and blotching
Anthracnose of Dogwood Caused by Elsinoe corni
Note the purplish spots on the flowers and
The disease also causes spots to form on the
Anthracnose Caused by Discula destructiva
Distribution of dogwood anthracnose
in the southeastern U.S.
Blue indicates counties which had reports
of D. destructiva prior to 1998
Red indicates counties which have reported
destructiva since 1998
In addition to necrosis and leaf spots, Discula destructiva
results in the formation of a canker on the stem of the tree and eventually
Spores of the fungus form in acervuli (left).
When mature they may be produced in a spore tendril (also called a cirrhus).
here for additional details on dogwood anthracnose.
Anthracnose Caused by Asteroma ulmeum
Note the leaf spots and chlorosis on the leaves.
Anthracnose Caused by Discula platani
Symptoms of this disease are defoliation and necrosis.
In addition to foliage symptoms, D. platani
causes bud blasting and cankering on the stem.
Anthracnose Caused by Aureobasidium apocryptum
Note the necrosis following the major veins
into the center of the leaf.
Anthracnose Caused by Cryptocline betularum
Note the limited leaf spots and the chlorosis.
Defoliation is common.
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This web site was prepared by Becky Bernard.
Last updated on 04 February 2008 by M.J. Munster