RESULTS

(22)

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DISEASE: Angular leaf spot

HOST: Tobacco

Leaf with light brown, angular spots. The difference between this disease and wildfire of tobacco is that wildfire is caused by a strain that produces tabtoxin. It causes conspicuous halos around lesions and large parts of a leaf may turn yellow .

Angular leaf spot | Tobacco

DISEASE: Angular leaf spot

HOST: Tobacco (Nicotiana tabacum)

PATHOGEN: Pseudomonas syringae pv. tabaci

SOURCE: H. Shew

DISEASE: Angular leaf spot

HOST: Tobacco

Yellowing of adjacent tissues occur as spots age (midseason). It causes conspicuous halos around lesions. Large parts of a leaf may turn yellow.

Angular leaf spot | Tobacco

DISEASE: Angular leaf spot

HOST: Tobacco (Nicotiana tabacum)

PATHOGEN: Pseudomonas syringae pv. tabaci

SOURCE: H. Shew

DISEASE: Angular leaf spot

HOST: Tobacco

Severely diseased leaf with extensive yellowing.

Angular leaf spot | Tobacco

DISEASE: Angular leaf spot

HOST: Tobacco (Nicotiana tabacum)

PATHOGEN: Pseudomonas syringae pv. tabaci

SOURCE: H. Shew

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: Bacterial blast and black pit

HOST: Citrus (Lime)

Characteristic symptoms of brownish black lesions on twigs and leaves (blast), starting with infection of petioles. Black pit refers to brown to black sunken spots on fruit, 5 to 20 mm in diameter.

Bacterial blast and black pit | Citrus (Lime)

DISEASE: Bacterial blast and black pit

HOST: Citrus (Lime) (Citrus sp.)

PATHOGEN: Pseudomonas syringae pv. syringae

SOURCE: P. Broadbent

DISEASE: Bacterial fasciation (Leafy gall)

HOST: Tobacco

Bacterial fasciation of tobacco.

Bacterial fasciation (Leafy gall) | Tobacco

DISEASE: Bacterial fasciation (Leafy gall)

HOST: Tobacco (Nicotiana tabacum)

PATHOGEN: Rhodococcus fascians

SOURCE: R. Raabe

DISEASE: Bacterial leaf spot

HOST: Citrus (sp. unknown)

Leaf with flat, spreading lesions.

Bacterial leaf spot | Citrus (sp. unknown)

DISEASE: Bacterial leaf spot

HOST: Citrus (sp. unknown) (Citrus sp.)

PATHOGEN: Xanthomonas alfalfae subsp. citrumelonis

PATHOGEN SYNONYM: Xanthomonas alfalfae subsp. citrumelo

SOURCE: J. H. Graham

DISEASE: Bacterial wilt

HOST: Tobacco

Severe wilt of tobacco.

Bacterial wilt | Tobacco

DISEASE: Bacterial wilt

HOST: Tobacco (Nicotiana tabacum)

PATHOGEN: Ralstonia solanacearum

PATHOGEN SYNONYM: Pseudomonas solanacearum

SOURCE: K. W. Liew

DISEASE: Citrus canker

HOST: Citrus (sp. unknown)

Fruit with erumpent, corky lesions with collapsed centers surrounded by blackish halos.

Citrus canker | Citrus (sp. unknown)

DISEASE: Citrus canker

HOST: Citrus (sp. unknown) (Citrus sp.)

PATHOGEN: Xanthomonas citri subsp. citri

PATHOGEN SYNONYM: Xanthomonas citri

SOURCE: J. Young