RESULTS

(6)

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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: Tulip

The disease causes white veins of leaves, yellow vascular bundles, and yellow bacterial slime on bulbs.

Bacterial blight | Tulip

DISEASE: Bacterial blight

HOST: Tulip (Tulipa sp. 'Paul Richter')

PATHOGEN: Curtobacterium flaccumfaciens pv. oortii

PATHOGEN SYNONYM: Corynebacterium flaccumfaciens subsp. oortii

SOURCE: M. Geesteranus, J. van der Wolf

DISEASE: Bacterial blight

HOST: Tulip

Stunted plants with wrinkled leaves.

Bacterial blight | Tulip

DISEASE: Bacterial blight

HOST: Tulip (Tulipa sp. 'Paul Richter')

PATHOGEN: Curtobacterium flaccumfaciens pv. oortii

PATHOGEN SYNONYM: Corynebacterium flaccumfaciens subsp. oortii

SOURCE: M. Geesteranus, J. van der Wolf

DISEASE: Fire blight

HOST: Pluot

Fire blight cankers on major limb. Pluot is an interspecific hybrid of plum and apricot.

Fire blight | Pluot

DISEASE: Fire blight

HOST: Pluot (Prunus hybrid 'Dandy Dapple')

PATHOGEN: Erwinia amylovora

SOURCE: S. Mohan

DISEASE: Fire blight

HOST: Pluot

Dead shoot, the result of systemic infection.

Fire blight | Pluot

DISEASE: Fire blight

HOST: Pluot (Prunus hybrid 'Dandy Dapple')

PATHOGEN: Erwinia amylovora

SOURCE: S. Mohan

DISEASE: Fire blight

HOST: Pluot

Typical symptoms of fire blight-infected shoot.

Fire blight | Pluot

DISEASE: Fire blight

HOST: Pluot (Prunus hybrid 'Dandy Dapple')

PATHOGEN: Erwinia amylovora

SOURCE: S. Mohan