(T. W. Bretz) J. Hunt
Description: Trenching machine used in establishing root graft disruption lines for oak wilt control. Exhibited during the forest pathology field trip of the American Phytopathological Society, 2003, near Shawano, WI.
Image type: Field
Image location: near Shawano, Wisconsin, United States
Name: Joseph O'Brien
Organization: USDA Forest Service
Country: United States