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DISEASE: Bacterial wilt and dieback

HOST: Willow

Cross sections of the characteristic "watermark stain" of diseased wood. Wilt and dieback occur as disease progresses.

Bacterial wilt and dieback | Willow

DISEASE: Bacterial wilt and dieback

HOST: Willow (Salix sp.)

PATHOGEN: Brenneria salicis

PATHOGEN SYNONYM: Erwinia salicis

SOURCE: Y. Sakamoto, M. Goto

DISEASE: Bacterial wilt and dieback

HOST: Willow

Severely diseased tree with dieback symptoms.

Bacterial wilt and dieback | Willow

DISEASE: Bacterial wilt and dieback

HOST: Willow (Salix sp.)

PATHOGEN: Brenneria salicis

PATHOGEN SYNONYM: Erwinia salicis

SOURCE: Y. Sakamoto, M. Goto

DISEASE: European stone fruit yellows

HOST: Almond

The disease causes yellowing and rolling of leaves (right). Leaves become thick and rough in texture. Healthy leaves (left).

European stone fruit yellows | Almond

DISEASE: European stone fruit yellows

HOST: Almond (Prunus dulcis)

PATHOGEN: 'Candidatus Phytoplasma prunorum'

PATHOGEN SYNONYM: Phytoplasma Apple proliferation group

SOURCE: E. Seemueller

DISEASE: Slippery skin

HOST: Onion

Rot progresses from the top of infected scales and eventually internal tissues rot. In early stages, the only external symptoms may be softening of the neck.

Slippery skin | Onion

DISEASE: Slippery skin

HOST: Onion (Allium cepa)

PATHOGEN: Burkholderia gladioli pv. alliicola

PATHOGEN SYNONYM: Pseudomonas gladioli pv. alliicola

SOURCE: H. Schwartz