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Dogwood Anthracnose
Anthracnose caused by the fungus Discula destructiva is a potentially fatal disease of dogwood. All varieties of the native flowering dogwood (Cornus florida and C. nuttallii) are susceptible. The disease usually starts on lower leaves and progresses into twigs and branches. Infected trees are severely weakened so that secondary canker and root rot diseases infect and kill the tree.
Infection by Discula usually occurs dunng cool rainy periods in the spnng. The fungus is spread by rain splashing spores. Dogwood Anthracnose is found from Massachusetts to Georgia and also the Pacific region of Canada and the Pacific Northwest U S.
Often the first symptoms of Discula destructive anthracnose are | spots on lower leaves and flower bracts. Spots are tan to brown and may have purple rings around them, i Leaf tissue will also be killed along with the veins or entire leaves will be killed. Those leaves, which succumb j to infection during the summer, will persist after normal leaf drop The infection will also spread from the leaves to the twig resulting in cankers and twig dieback. Epicormic branchesiwater sprouts) are more susceptible to the fungus, thus dieback is more rapid. The resulting canker can girdle and kill the branch.
For more information on your plant health or to schedule an appointment for a complimentary consultation with me, call 877-BAR7IETT today, or email me at |wood§bart)ett.com.
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