RESULTS

(4)

FILTER

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheatgrass

Lesions on leaves first appear as water-soaked, translucent, long, narrow streaks. They later turn brown and necrotic and often coalesce into blighted areas.

Black chaff (Bacterial leaf streak) | Wheatgrass

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheatgrass (Elytrigia intermedia)

PATHOGEN: Xanthomonas translucens pv. cerealis

SOURCE: S. Mohan

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheatgrass

Close-up of leaf with brown necrotic streaks.

Black chaff (Bacterial leaf streak) | Wheatgrass

DISEASE: Black chaff (Bacterial leaf streak)

HOST: Wheatgrass (Elytrigia intermedia)

PATHOGEN: Xanthomonas translucens pv. cerealis

SOURCE: S. Mohan

DISEASE: Crown gall

HOST: Euonymus

Dark, rough galls at base of euonymus.

Crown gall | Euonymus

DISEASE: Crown gall

HOST: Euonymus (Euonymus sp.)

PATHOGEN: Agrobacterium tumefaciens

PATHOGEN SYNONYM: Rhizobium sp.

SOURCE: L. Claflin

DISEASE: Pear decline

HOST: Pear

'Bartlett' pears were grafted onto tolerant rootstock. All trees are infected. Note yellowish, diseased branches.

Pear decline | Pear

DISEASE: Pear decline

HOST: Pear (Pyrus communis 'Bartlett')

PATHOGEN: 'Candidatus Phytoplasma pyri'

PATHOGEN SYNONYM: Phytoplasma Apple proliferation group

SOURCE: C. Smart