In other words, when native dogwoods were crossed with Korean dogwoods, their offspring could fight the disease to a standstill. They found that although our native flowering dogwood ( Cornus florida) and the Korean dogwood ( Cornus kousa) are susceptible to this disease, their inter-species hybrids are not. Researchers began testing for discula resistance in the early 1980’s. That means that most of our trees, both landscape and woodland types, are reasonably safe. Fortunately, scientists have observed that most of the infected trees occur on elevated mountainsides and on dogwoods growing in heavy shade. Discula destructiva has killed thousands of native dogwoods along the Atlantic seaboard. Von’s information is true, but it’s not time yet to hit the panic button in Atlanta. “Do you have a list of dogwoods that are disease resistant?” he wrote, “I’ve heard that a new fungus is killing a lot of the wild trees in the Smokies.” My old friend Von Woods sent me a question a few weeks ago that made me do a little research.
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