RESULTS

(5)

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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: Bacterial leaf scorch

HOST: Sycamore

Sycamore with scorched leaves and dieback of small branches.

Bacterial leaf scorch | Sycamore

DISEASE: Bacterial leaf scorch

HOST: Sycamore (Platanus occidentalis)

PATHOGEN: Xylella fastidiosa

SOURCE: W. Sinclair

DISEASE: Bacterial leaf scorch

HOST: Sycamore

Close-up of scorched leaves.

Bacterial leaf scorch | Sycamore

DISEASE: Bacterial leaf scorch

HOST: Sycamore (Platanus occidentalis)

PATHOGEN: Xylella fastidiosa

SOURCE: W. Sinclair

DISEASE: Wildfire (Angular leaf spot)

HOST: Tobacco

Characteristic symptoms are necrotic, brown spots with angular margins surrounded by distinct yellow halos. The halos are caused by the production of tabtoxin.

Wildfire (Angular leaf spot) | Tobacco

DISEASE: Wildfire (Angular leaf spot)

HOST: Tobacco (Nicotiana tabacum)

PATHOGEN: Pseudomonas syringae pv. tabaci

SOURCE: G. Lucas

DISEASE: X-disease (Peach yellow leaf roll)

HOST: Peach

Peach twig with yellow, curled (rolled) leaves.

X-disease (Peach yellow leaf roll) | Peach

DISEASE: X-disease (Peach yellow leaf roll)

HOST: Peach (Prunus persica)

PATHOGEN: 'Candidatus Phytoplasma mali'

PATHOGEN SYNONYM: Phytoplasma Apple proliferation group

SOURCE: W. Sinclair