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: Fire blight

HOST: Scarlet firethorn

Pyracantha with blighted twig. Ingress was probably through blossoms. Cankers commonly occur on branches.

Fire blight | Scarlet firethorn

DISEASE: Fire blight

HOST: Scarlet firethorn (Pyracantha coccinea)

PATHOGEN: Erwinia amylovora

SOURCE: W. Sinclair

DISEASE: Witches'-broom

HOST: Cactus

Witches'-broom of Opuntia cactus.

Witches'-broom | Cactus

DISEASE: Witches'-broom

HOST: Cactus (Opuntia sp.)

PATHOGEN: 'Candidatus Phytoplasma' sp.

PATHOGEN SYNONYM: Phytoplasma (undefined)

SOURCE: R. McCoy, M. Davis