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Botryosphaeria canker (Botryosphaeria spp.) on Pecan 'Pawnee' (Carya illinoinensis)


18 Images
5368294
Paul Bachi
University of Kentucky Research and Education Center

Tree with a large section of the trunk with exposed xylem wood. Pawnee cultivar.

5368295
Paul Bachi
University of Kentucky Research and Education Center

Closer view of trunk with exposed xylem wood. Pawnee cultivar.

5368296
Paul Bachi
University of Kentucky Research and Education Center

View shows a few holes from secondary borers in xylem wood. Pawnee cultivar.

5368297
Paul Bachi
University of Kentucky Research and Education Center

Trunk section from another tree in sample showing callus tissue formation. Pawnee cultivar.

5368298
Paul Bachi
University of Kentucky Research and Education Center

One end of the trunk section in cross section. Pawnee cultivar.

5368299
Paul Bachi
University of Kentucky Research and Education Center

The opposite end of the same trunk section in cross section. Pawnee cultivar.

5368300
Paul Bachi
University of Kentucky Research and Education Center

Close-up of callus tissue showing some areas with black spore-producing bodies ("pycnidia") embedded. Pawnee cultivar.

5368301
Paul Bachi
University of Kentucky Research and Education Center

Closer view of callus tissue showing some areas with black spore-producing bodies ("pycnidia"). Pawnee cultivar.

5368302
Paul Bachi
University of Kentucky Research and Education Center

Closer view of callus tissue showing some areas with black spore-producing bodies ("pycnidia") after shallow slicing of tissue. Pawnee cultivar.

5368303
Paul Bachi
University of Kentucky Research and Education Center

After slicing through black spore-producing bodies ("pycnidia") gray/white inner portions are exposed. Pawnee cultivar.

5368304
Paul Bachi
University of Kentucky Research and Education Center

Dark-field observation of spore-producing bodies ("pycnidia"). Pawnee cultivar.

5368305
Paul Bachi
University of Kentucky Research and Education Center

Dark-field observation of spore-producing bodies ("pycnidia") after spores released. Pawnee cultivar.

5368306
Paul Bachi
University of Kentucky Research and Education Center

Dark-field observation of spores released from a spore-producing body ("pycnidium"). Pawnee cultivar.

5368307
Paul Bachi
University of Kentucky Research and Education Center

Dark-field observation of a spore-producing body ("pycnidium") with spores remaining. Pawnee cultivar.

5368308
Paul Bachi
University of Kentucky Research and Education Center

Spores of the anamorph fungus Diplodia mutila. Pawnee cultivar.

5368309
Paul Bachi
University of Kentucky Research and Education Center

Spores of the anamorph fungus Diplodia mutila with measurement of length. Pawnee cultivar.

5368310
Paul Bachi
University of Kentucky Research and Education Center

A few spores of the anamorph fungus Diplodia mutila are two-celled. Pawnee cultivar.

5368311
Paul Bachi
University of Kentucky Research and Education Center

Spores of the anamorph fungus Diplodia mutila at various stages of maturity. Pawnee cultivar.