Scientists learned recently that thousand cankers disease of walnut (the walnut twig beetle Pityophthorus juglandis and its associated fungus, Geosmithia morbida) has been found in Knoxville, Tennessee. The extent of the infestation has not been delimited, but it appears to have been present for a decade or more – and people have probably moved wood from the infested trees. One nightmare – Great Smoky Mountains National Park is only 40 miles away. For more information click.
You will find information on diagnosis, Questions and Answers, and a Fact Sheet and links to pictures and Powerpoint Talks, including the version of “Nightmare on Walnut Street” that Whitney Cranshaw presented at the ISA Meeting last week in Chicago.