Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Tree with a large section of the trunk with exposed xylem wood. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Closer view of trunk with exposed xylem wood. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
View shows a few holes from secondary borers in xylem wood. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Trunk section from another tree in sample showing callus tissue formation. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
One end of the trunk section in cross section. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
The opposite end of the same trunk section in cross section. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Close-up of callus tissue showing some areas with black spore-producing bodies ("pycnidia") embedded. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Closer view of callus tissue showing some areas with black spore-producing bodies ("pycnidia"). Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Closer view of callus tissue showing some areas with black spore-producing bodies ("pycnidia") after shallow slicing of tissue. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
After slicing through black spore-producing bodies ("pycnidia") gray/white inner portions are exposed. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Dark-field observation of spore-producing bodies ("pycnidia"). Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Dark-field observation of spore-producing bodies ("pycnidia") after spores released. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Dark-field observation of spores released from a spore-producing body ("pycnidium"). Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Dark-field observation of a spore-producing body ("pycnidium") with spores remaining. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Spores of the anamorph fungus Diplodia mutila. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Spores of the anamorph fungus Diplodia mutila with measurement of length. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
A few spores of the anamorph fungus Diplodia mutila are two-celled. Pawnee cultivar.
Paul Bachi, University of Kentucky Research and Education Center, Bugwood.org
Spores of the anamorph fungus Diplodia mutila at various stages of maturity. Pawnee cultivar.
Tree with a large section of the trunk with exposed xylem wood. Pawnee cultivar.
Closer view of trunk with exposed xylem wood. Pawnee cultivar.
View shows a few holes from secondary borers in xylem wood. Pawnee cultivar.
Trunk section from another tree in sample showing callus tissue formation. Pawnee cultivar.
One end of the trunk section in cross section. Pawnee cultivar.
The opposite end of the same trunk section in cross section. Pawnee cultivar.
Close-up of callus tissue showing some areas with black spore-producing bodies ("pycnidia") embedded. Pawnee cultivar.
Closer view of callus tissue showing some areas with black spore-producing bodies ("pycnidia"). Pawnee cultivar.
Closer view of callus tissue showing some areas with black spore-producing bodies ("pycnidia") after shallow slicing of tissue. Pawnee cultivar.
After slicing through black spore-producing bodies ("pycnidia") gray/white inner portions are exposed. Pawnee cultivar.
Dark-field observation of spore-producing bodies ("pycnidia"). Pawnee cultivar.
Dark-field observation of spore-producing bodies ("pycnidia") after spores released. Pawnee cultivar.
Dark-field observation of spores released from a spore-producing body ("pycnidium"). Pawnee cultivar.
Dark-field observation of a spore-producing body ("pycnidium") with spores remaining. Pawnee cultivar.
Spores of the anamorph fungus Diplodia mutila. Pawnee cultivar.
Spores of the anamorph fungus Diplodia mutila with measurement of length. Pawnee cultivar.
A few spores of the anamorph fungus Diplodia mutila are two-celled. Pawnee cultivar.
Spores of the anamorph fungus Diplodia mutila at various stages of maturity. Pawnee cultivar.