Canker Diseases - Conifers
Shoot dieback caused by Sphaeropsis sapinea.
Cankers on the main stem of red pine caused by Sphaeropsis.
Pycnidia at base of needles
Pycnidia produced on a cone
Higher magnification of pycnidia on cone.
Department of Plant Pathology | 495 Borlaug Hall 1991 Upper Buford Circle | St. Paul, MN 55108 (612) 625-8200 | Fax: (612) 625-9728 | firstname.lastname@example.org