DISEASE: Almond leaf scorch
HOST: Almond
Light brown necrotic (scorched) areas on curling leaves.
Almond leaf scorch | Almond
DISEASE: Almond leaf scorch
HOST: Almond (Prunus dulcis)
PATHOGEN: Xylella fastidiosa
SOURCE: W. Sinclair
DISEASE: Almond leaf scorch
HOST: Almond
Dying almond trees with scorched appearance. Initial symptoms are marginal chlorosis, usually late in the year. Scorch often is first noted at leaf tips, symptoms worsen, and terminal branches may die.
Almond leaf scorch | Almond
DISEASE: Almond leaf scorch
HOST: Almond (Prunus dulcis)
PATHOGEN: Xylella fastidiosa
SOURCE: R. Davis, M. Davis
DISEASE: Bacterial canker
HOST: Almond
Infected tissues with reddish necrotic spots, a key diagnostic symptom for the disease. Spots and streaks are commonly seen when bark is removed.
Bacterial canker | Almond
DISEASE: Bacterial canker
HOST: Almond (Prunus dulcis)
PATHOGEN: Pseudomonas syringae pv. syringae
SOURCE: B. Teviotdale
DISEASE: Bacterial canker
HOST: Almond
Diamond-shaped canker on infected limb. Such cankers are common on small limbs and spurs.
Bacterial canker | Almond
DISEASE: Bacterial canker
HOST: Almond (Prunus dulcis)
PATHOGEN: Pseudomonas syringae pv. syringae
SOURCE: B. Teviotdale
DISEASE: Bacterial fasciation (Leafy gall)
HOST: Dahlia
Dalhlia tubers with proliferation and leaf development.
Bacterial fasciation (Leafy gall) | Dahlia
DISEASE: Bacterial fasciation (Leafy gall)
HOST: Dahlia (Dahlia sp.)
PATHOGEN: Rhodococcus fascians
SOURCE: M. Shurtleff
DISEASE: Bacterial fasciation (Leafy gall)
HOST: Dahlia
Bacterial fasciation of dahlia tubers.
Bacterial fasciation (Leafy gall) | Dahlia
DISEASE: Bacterial fasciation (Leafy gall)
HOST: Dahlia (Dahlia sp.)
PATHOGEN: Rhodococcus fascians
SOURCE: H. van Hoof, M. Geesteranus
DISEASE: Bacterial fasciation (Shoot proliferation)
HOST: Candytuft
The disease causes production of multiple shoots.
Bacterial fasciation (Shoot proliferation) | Candytuft
DISEASE: Bacterial fasciation (Shoot proliferation)
HOST: Candytuft (Iberis sp.)
PATHOGEN: Rhodococcus fascians
SOURCE: M. Putnam
DISEASE: Bacterial hyperplastic canker
HOST: Almond
Diseased tree with multiple cankers. Margins of cankers are rough, soft, cheesy, dark brown, and have scalloped water-soaked spots that turn brown. Multiple cankers may girdle and kill small twigs.
Bacterial hyperplastic canker | Almond
DISEASE: Bacterial hyperplastic canker
HOST: Almond (Prunus dulcis)
PATHOGEN: Pseudomonas amygdali
SOURCE: P. Psallidas
DISEASE: Bacterial rot
HOST: Dahlia
Longitudinal section of dahlia with discolored, rotted tissues.
Bacterial rot | Dahlia
DISEASE: Bacterial rot
HOST: Dahlia (Dahlia sp.)
PATHOGEN: Dickeya sp.
PATHOGEN SYNONYM: Erwinia chrysanthemi
SOURCE: J. Young