RESULTS

(9)

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DISEASE: Olive knot

HOST: Olive

Multiple infections of young stems. The bacterium invades vascular tissues during certain times of the year and may be isolated from branches that appear healthy.

Olive knot | Olive

DISEASE: Olive knot

HOST: Olive (Olea europaea)

PATHOGEN: Pseudomonas savastanoi pv. savastanoi

SOURCE: M. Schroth

DISEASE: Olive knot

HOST: Olive

Tree with knots/galls on branches along with twig dieback, which is associated with knots. Fusarium and Diplodia spp. infect through knots and are thought to be main reason for dieback.

Olive knot | Olive

DISEASE: Olive knot

HOST: Olive (Olea europaea)

PATHOGEN: Pseudomonas savastanoi pv. savastanoi

SOURCE: M. Schroth

DISEASE: Olive knot

HOST: Olive

Multiple infections on olive branch. Knots at this stage begin to die from the outside in and are infected by several fungi.

Olive knot | Olive

DISEASE: Olive knot

HOST: Olive (Olea europaea)

PATHOGEN: Pseudomonas savastanoi pv. savastanoi

SOURCE: M. Schroth

DISEASE: Syringae leaf spot

HOST: Tomato

Leaves with brown necrotic lesions and chlorotic margins. Symptoms vary greatly among cultivars. Some have black or brown lesions with bright yellow, chlorotic areas and others do not have yellowing.

Syringae leaf spot | Tomato

DISEASE: Syringae leaf spot

HOST: Tomato (Lycopersicon esculentum)

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: R. Gitaitis

DISEASE: X-disease

HOST: Peach

Typical symptoms of diseased tree with yellowing of leaves. Leaves become necrotic and dehisce.

X-disease | Peach

DISEASE: X-disease

HOST: Peach (Prunus persica)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: R. Davis, M. Davis

DISEASE: X-disease

HOST: Peach

Late stage of leaf infection. Red-yellow blotches appear after initial water-soaking of leaves. Margins roll upward and leaves appear tattered.

X-disease | Peach

DISEASE: X-disease

HOST: Peach (Prunus persica)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: W. Sinclair

DISEASE: X-disease

HOST: Peach

Stunted foliage (left) with some necrosis and small angular fruit. Healthy foliage and fruit (right).

X-disease | Peach

DISEASE: X-disease

HOST: Peach (Prunus persica)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: A. Purcell, M. Davis

DISEASE: X-disease

HOST: Peach

Early symptoms are reddish, blotchy areas on cupped leaves.

X-disease | Peach

DISEASE: X-disease

HOST: Peach (Prunus persica)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: D. Rosenberger

DISEASE: X-disease

HOST: Peach

Stunted, disfigured peach shoot (left). Healthy (right).

X-disease | Peach

DISEASE: X-disease

HOST: Peach (Prunus persica)

PATHOGEN: 'Candidatus Phytoplasma pruni'

PATHOGEN SYNONYM: Phytoplasma X-disease group

SOURCE: R. Raabe