Figure 4. Discoloration and streaking within the sapwood of host trees is a common sign of laurel wilt disease.
A panel image shows two examples of streaking in the sapwood of host trees. The left image shows an area of sapwood beneath stripped bark, and the right image shows a ring of disco

Ronald F. Billings, Texas A&M Forest Service, Bugwood.org (left); Albert (Bud) Mayfield, USDA Forest Service, Bugwood.org (right)