RESULTS

(7)

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DISEASE: Carrot yellows

HOST: Carrot

Flowers with shoot proliferation (witches’-broom) (left). Healthy flower (right). Virescence and phyllody of flower parts are common.

Carrot yellows | Carrot

DISEASE: Carrot yellows

HOST: Carrot (Daucus carota)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: M. Schroth

DISEASE: Carrot yellows

HOST: Carrot

Carrot with proliferation of roots. Initial symptoms include yellowing and narrowing of veins of young leaves. The entire leaf later becomes necrotic.

Carrot yellows | Carrot

DISEASE: Carrot yellows

HOST: Carrot (Daucus carota)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: G. S. Abawi

DISEASE: Drippy gill

HOST: Mushroom

Drippy gill is characterized by small dark spots on gills with drops of bacterial ooze at the centers. Severe infection results in slimy areas and collapse of gills.

Drippy gill | Mushroom

DISEASE: Drippy gill

HOST: Mushroom (Agaricus campestris)

PATHOGEN: Pseudomonas agarici

SOURCE: J. Young

DISEASE: Drippy gill

HOST: Mushroom

Close-up of infected gills with bacterial ooze.

Drippy gill | Mushroom

DISEASE: Drippy gill

HOST: Mushroom (Agaricus campestris)

PATHOGEN: Pseudomonas agarici

SOURCE: J. Young

DISEASE: Drippy gill

HOST: Mushroom

Another view of small, dark spots on gills.

Drippy gill | Mushroom

DISEASE: Drippy gill

HOST: Mushroom (Agaricus campestris)

PATHOGEN: Pseudomonas agarici

SOURCE: J. Young

DISEASE: Varnish spot

HOST: Lettuce

Leaf with large brown and small, shiny, dark brown necrotic spots that spread in size and later dry out.

Varnish spot | Lettuce

DISEASE: Varnish spot

HOST: Lettuce (Lactuca sativa)

PATHOGEN: Pseudomonas cichorii

SOURCE: S. Miller

DISEASE: Varnish spot

HOST: Lettuce

Advanced stage of disease with large, brown necrotic areas. They most often are along veins. Outermost leaves of the head usually are not affected.

Varnish spot | Lettuce

DISEASE: Varnish spot

HOST: Lettuce (Lactuca sativa)

PATHOGEN: Pseudomonas cichorii

SOURCE: K. Ohata, M. Goto