RESULTS

(19)

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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: Bacterial leaf spot

HOST: Laurel (California laurel)

Leaf with dark brown, angular spots.

Bacterial leaf spot | Laurel (California laurel)

DISEASE: Bacterial leaf spot

HOST: Laurel (California laurel) (Umbellularia californica)

PATHOGEN: Pseudomonas sp.

PATHOGEN SYNONYM: Pseudomonas lauracearum

SOURCE: W. Sinclair

DISEASE: Bacterial leaf spot

HOST: Peanut

The disease causes water-soaked lesions, particularly on upper leaf surfaces. Lesions enlarge and later display brown necrotic areas. Leaflets become chlorotic and shed prematurely.

Bacterial leaf spot | Peanut

DISEASE: Bacterial leaf spot

HOST: Peanut (Arachis hypogaea)

PATHOGEN: Pseudomonas sp.

SOURCE: P. Subrahmanyam

DISEASE: Bacterial leaf spot

HOST: Verbena

Leaf with purple-brown necrotic spots.

Bacterial leaf spot | Verbena

DISEASE: Bacterial leaf spot

HOST: Verbena (Verbena sp.)

PATHOGEN: Pseudomonas sp.

SOURCE: R. Raabe

DISEASE: Citrus greening (Huanglongbing)

HOST: Citrus (sp. unknown)

Citrus psyllid (Diaphorina citri), a vector of 'Candidatus Liberibacter asiaticus', the cause of citrus greening, feeding on green twig.

Citrus greening (Huanglongbing) | Citrus (sp. unknown)

DISEASE: Citrus greening (Huanglongbing)

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

PATHOGEN: 'Candidatus Liberibacter asiaticus'

PATHOGEN SYNONYM: Candidatus Liberobacter asiaticus

SOURCE: C. Jacobson

DISEASE: Citrus greening (Huanglongbing)

HOST: Citrus (sp. unknown)

Citrus psyllid (Diaphorina citri), a vector of 'Candidatus Liberibacter asiaticus', the cause of citrus greening.

Citrus greening (Huanglongbing) | Citrus (sp. unknown)

DISEASE: Citrus greening (Huanglongbing)

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

PATHOGEN: 'Candidatus Liberibacter asiaticus'

PATHOGEN SYNONYM: Candidatus Liberobacter asiaticus

SOURCE: C. Jacobson

DISEASE: Citrus greening (Huanglongbing)

HOST: Citrus (sp. unknown)

Citrus psyllid (Diaphorina citri), a vector of 'Candidatus Liberibacter asiaticus', the cause of citrus greening.

Citrus greening (Huanglongbing) | Citrus (sp. unknown)

DISEASE: Citrus greening (Huanglongbing)

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

PATHOGEN: 'Candidatus Liberibacter asiaticus'

PATHOGEN SYNONYM: Candidatus Liberobacter asiaticus

SOURCE: C. Hirayama