RESULTS

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DISEASE: Bacterial mosaic

HOST: Wheat

Diseased leaves with mosaic pattern exhibiting various amounts of yellowing. Leaves were artificially inoculated by vacuum infiltration.

Bacterial mosaic | Wheat

DISEASE: Bacterial mosaic

HOST: Wheat (Triticum aestivum)

PATHOGEN: Clavibacter michiganensis subsp. tessellarius

SOURCE: A. Vidaver

DISEASE: Bacterial needle blight

HOST: China fir

Leaves with brown blotches. Some are dead.

Bacterial needle blight | China fir

DISEASE: Bacterial needle blight

HOST: China fir (Cunninghamia lanceolata)

PATHOGEN: Pseudomonas syringae pv. cunninghamiae

SOURCE: M. Goto

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