RESULTS

(3)

FILTER

DISEASE: Aster yellows

HOST: Squash

Diagnostic characteristics for the disease are yellowing of young leaves, proliferation of secondary shoots, and rigid erect habit. Leaves are misshapen and smaller than normal and have stiff, thick laminae.

Aster yellows | Squash

DISEASE: Aster yellows

HOST: Squash (Cucurbita sp.)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: S. Miller

DISEASE: Bacterial blight

HOST: Parsnip

Parsnip with severe blight symptoms. There also is browning of the vascular system. Rot may progress from the crown into roots.

Bacterial blight | Parsnip

DISEASE: Bacterial blight

HOST: Parsnip (Pastinaca sativa)

PATHOGEN: Pseudomonas viridiflava

SOURCE: J. Hunter

DISEASE: Bacterial leaf blight and rot

HOST: Orchid

Leaves of Dendrobium orchid with necrosis, discoloration, and rot.

Bacterial leaf blight and rot | Orchid

DISEASE: Bacterial leaf blight and rot

HOST: Orchid (Dendrobium sp.)

PATHOGEN: Burkholderia gladioli pv. gladioli

PATHOGEN SYNONYM: Pseudomonas gladioli pv. gladioli

SOURCE: L. Keith