RESULTS

(7)

FILTER

DISEASE: Bacterial leaf scorch

HOST: Pecan

Pecan with necrotic scorched leaves with distinct dark lines between healthy and diseased tissues.

Bacterial leaf scorch | Pecan

DISEASE: Bacterial leaf scorch

HOST: Pecan (Carya illinoinensis)

PATHOGEN: Xylella fastidiosa

SOURCE: T. Brenneman

DISEASE: Bunch disease

HOST: Pecan

Pecan exhibiting bunch symptoms at ends of branches. This disease is thought to be caused by a phytoplasma similar to the walnut bunch pathogen in the X-disease group.

Bunch disease | Pecan

DISEASE: Bunch disease

HOST: Pecan (Carya illinoinensis)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: W. Sinclair

DISEASE: Bunch disease

HOST: Pecan

Severe case of bunch disease. Note bunches of foliage.

Bunch disease | Pecan

DISEASE: Bunch disease

HOST: Pecan (Carya illinoinensis)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: P. Bertrand

DISEASE: Foamy canker

HOST: Koa

Foamy canker of koa is associated with bacteria and yeast. The causal agent has not been identified.

Foamy canker | Koa

DISEASE: Foamy canker

HOST: Koa (Acacia koa)

PATHOGEN: Causal agent unknown

SOURCE: H. Keyser

DISEASE: Foamy canker

HOST: Koa

Dieback of koa tree. The causal agent has not been identified.

Foamy canker | Koa

DISEASE: Foamy canker

HOST: Koa (Acacia koa)

PATHOGEN: Causal agent unknown

SOURCE: H. Keyser

DISEASE: Halo blight

HOST: Bean

Leaf of 'Bountiful' bean with chlorotic halos, an early stage of disease. Tiny water-soaked are difficult to see.

Halo blight | Bean

DISEASE: Halo blight

HOST: Bean (Phaseolus vulgaris 'Bountiful')

PATHOGEN: Pseudomonas syringae pv. phaseolicola

PATHOGEN SYNONYM: Pseudomonas savastanoi pv. phaseolicola

SOURCE: M. Schroth

DISEASE: Witches'-broom

HOST: Pecan

Diseased pecan with short branches on trunk with witches'-broom appearance.

Witches'-broom | Pecan

DISEASE: Witches'-broom

HOST: Pecan (Carya illinoinensis)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: P. Bertrand