RESULTS

(6)

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DISEASE: Australian citrus dieback

HOST: Citrus (Grapefruit)

Leaves with mottled chlorosis.

Australian citrus dieback | Citrus (Grapefruit)

DISEASE: Australian citrus dieback

HOST: Citrus (Grapefruit) (Citrus paradisi)

PATHOGEN: 'Candidatus Phytoplasma' sp.

PATHOGEN SYNONYM: Phytoplasma (undefined)

SOURCE: P. Broadbent

DISEASE: Australian citrus dieback

HOST: Citrus (Grapefruit)

Late stage of disease. Note yellowing of leaf veins and entire leaves.

Australian citrus dieback | Citrus (Grapefruit)

DISEASE: Australian citrus dieback

HOST: Citrus (Grapefruit) (Citrus paradisi)

PATHOGEN: 'Candidatus Phytoplasma' sp.

PATHOGEN SYNONYM: Phytoplasma (undefined)

SOURCE: P. Broadbent

DISEASE: Australian citrus dieback

HOST: Citrus (Lime)

Severe decline, a late stage of disease. The disease spreads slowly in mature trees, progressing faster in young trees.

Australian citrus dieback | Citrus (Lime)

DISEASE: Australian citrus dieback

HOST: Citrus (Lime) (Citrus sp.)

PATHOGEN: 'Candidatus Phytoplasma australiense'

PATHOGEN SYNONYM: Phytoplasma Stolbur group

SOURCE: P. Broadbent

DISEASE: Elm leaf scorch

HOST: Elm

Diseased tree with scorch at leaf margins.

Elm leaf scorch | Elm

DISEASE: Elm leaf scorch

HOST: Elm (Ulmus americana)

PATHOGEN: Xylella fastidiosa

SOURCE: J. Sherald, M. Shurtleff

DISEASE: Elm leaf scorch

HOST: Elm

Severely diseased tree with dieback and scorched leaves.

Elm leaf scorch | Elm

DISEASE: Elm leaf scorch

HOST: Elm (Ulmus americana)

PATHOGEN: Xylella fastidiosa

SOURCE: W. Sinclair

DISEASE: Marginal leaf blight

HOST: Lettuce

Marginal leaf blight first appears as slimy wilting of leaf margins. Small, reddish lesions may be seen on leaf blades. Infected tissues turn brown to black in time.

Marginal leaf blight | Lettuce

DISEASE: Marginal leaf blight

HOST: Lettuce (Lactuca sativa)

PATHOGEN: Pseudomonas marginalis

SOURCE: L. Fucikovsky