RESULTS

(21)

FILTER

DISEASE: Elm yellows

HOST: Elm

Symptoms of elm yellows occasionally appear on one branch before others, but more often they involve the entire crown.

Elm yellows | Elm

DISEASE: Elm yellows

HOST: Elm (Ulmus americana)

PATHOGEN: 'Candidatus Phytoplasma ulmi'

PATHOGEN SYNONYM: Phytoplasma Elm yellows group

SOURCE: W. Sinclair

DISEASE: Elm yellows

HOST: Elm

Diseased twig (right) with epinasty, chlorosis, and yellowing of leaves. Sometimes both yellow and green leaves occur on same branch. Healthy branch (left).

Elm yellows | Elm

DISEASE: Elm yellows

HOST: Elm (Ulmus americana)

PATHOGEN: 'Candidatus Phytoplasma ulmi'

PATHOGEN SYNONYM: Phytoplasma Elm yellows group

SOURCE: W. Sinclair

DISEASE: Elm yellows

HOST: Elm

Branches with butterscotch discoloration (center) and necrotic flecks in phloem and vascular cambium (right). Healthy branch (left). Sudden wilt and browning is common with small trees.

Elm yellows | Elm

DISEASE: Elm yellows

HOST: Elm (Ulmus americana)

PATHOGEN: 'Candidatus Phytoplasma ulmi'

PATHOGEN SYNONYM: Phytoplasma Elm yellows group

SOURCE: W. Sinclair

DISEASE: Elm yellows

HOST: Elm

Elm yellows is characterized by witches'-brooms and stunting. Some cultivars have both yellow and reddish foliar discoloration.

Elm yellows | Elm

DISEASE: Elm yellows

HOST: Elm (Ulmus parvifolia)

PATHOGEN: 'Candidatus Phytoplasma ulmi'

PATHOGEN SYNONYM: Phytoplasma Elm yellows group

SOURCE: W. Sinclair

DISEASE: Elm yellows

HOST: Elm

Late stage of elm yellows disease.

Elm yellows | Elm

DISEASE: Elm yellows

HOST: Elm (Ulmus rubra)

PATHOGEN: 'Candidatus Phytoplasma ulmi'

PATHOGEN SYNONYM: Phytoplasma Elm yellows group

SOURCE: W. Sinclair

DISEASE: Halo blight

HOST: Coffee

Leaf with blackish lesions surrounded by yellow halos.

Halo blight | Coffee

DISEASE: Halo blight

HOST: Coffee (Coffea dewevrei)

PATHOGEN: Pseudomonas syringae pv. garcae

SOURCE: S. Mohan

DISEASE: Halo blight

HOST: Coffee

Young blighted coffee plant.

Halo blight | Coffee

DISEASE: Halo blight

HOST: Coffee (Coffea dewevrei)

PATHOGEN: Pseudomonas syringae pv. garcae

SOURCE: S. Mohan

DISEASE: Halo blight

HOST: Coffee

Stem blight stage of disease.

Halo blight | Coffee

DISEASE: Halo blight

HOST: Coffee (Coffea dewevrei)

PATHOGEN: Pseudomonas syringae pv. garcae

SOURCE: S. Mohan

DISEASE: Halo blight

HOST: Coffee

Coffee leaf with lesion on margin.

Halo blight | Coffee

DISEASE: Halo blight

HOST: Coffee (Coffea dewevrei)

PATHOGEN: Pseudomonas syringae pv. garcae

SOURCE: S. Mohan