dogwood - Knowledgebase Question

carmel, Ne
Question by cadele429
July 8, 2010
i purchased 3 white cornus florida in spring. each has slowly died one after the other (leaves curled and blackened) can you possibly tell me what went wrong with my dogwoods?


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Answer from NGA
July 8, 2010

0

Dogwoods are susceptible to various fungal diseases and these are worse during wet springs than during dry springs. I can't tell without looking at your dogwoods but your description leads me to believe they were infected with Ascochyta blight, caused by Ascochyta cornicola. It usually appears in June after a wet spring. The disease is characterized by round to irregular spots that have a gray-to-tan center and a dark border. If several of these spots develop on a leaf, the entire leaf may suddenly collapse, shrivel and turn black. Fungicides, especially systemic fungicides, will help prevent these fungal diseases if you decide to replace your dogwoods.

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