RESULTS

(6)

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 wilt

HOST: Heliconia

Wilted and dying heliconia plant.

Bacterial wilt | Heliconia

DISEASE: Bacterial wilt

HOST: Heliconia (Heliconia sp.)

PATHOGEN: Ralstonia solanacearum

PATHOGEN SYNONYM: Pseudomonas solanacearum

SOURCE: I. Buddenhagen

DISEASE: Bacterial wilt

HOST: Heliconia

Heliconia spathes with wilt and leaf necrosis.

Bacterial wilt | Heliconia

DISEASE: Bacterial wilt

HOST: Heliconia (Heliconia sp.)

PATHOGEN: Ralstonia solanacearum

PATHOGEN SYNONYM: Pseudomonas solanacearum

SOURCE: I. Buddenhagen

DISEASE: Bacterial wilt

HOST: Heliconia

Heliconia stalk with discolored base.

Bacterial wilt | Heliconia

DISEASE: Bacterial wilt

HOST: Heliconia (Heliconia sp.)

PATHOGEN: Ralstonia solanacearum

PATHOGEN SYNONYM: Pseudomonas solanacearum

SOURCE: I. Buddenhagen

DISEASE: Bacterial wilt

HOST: Heliconia

Spathe of heliconia infected with bacterial wilt (right) compared with healthy spathe.

Bacterial wilt | Heliconia

DISEASE: Bacterial wilt

HOST: Heliconia (Heliconia sp.)

PATHOGEN: Ralstonia solanacearum

PATHOGEN SYNONYM: Pseudomonas solanacearum

SOURCE: I. Buddenhagen

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