Thousand Cankers or Geosmithia morbida is a fungal disease of walnut (Juglans spp.) trees that is vectored or spread from tree to tree by the walnut twig beetle Pityophthorus juglandis. Thousand Cankers Disease is a newly recognized pest that has produced widespread death of walnuts in many western U.S. states east of the Mississippi. Currently, this disease is found in Arizona, California, Colorado, Idaho, Nevada, New Mexico, Oregon, Pennsylvania, Utah, Virginia, Washington, Tennessee and now Haywood County (fall of 2012) North Carolina. Trees susceptible to Thousand Cankers Disease include many western walnut species along with black walnut and butternut trees from North Carolina. Fortunately, this disease does not affect pecan and hickory species.
Read more at: https://swain.ces.ncsu.edu/2013/01/thousand-cankers-disease-2/
Read more at: https://swain.ces.ncsu.edu/2013/01/thousand-cankers-disease-2/