RESULTS

(4)

FILTER

DISEASE: Bacterial leaf spot

HOST: Laurel (California laurel)

Leaf with dark brown, angular spots.

Bacterial leaf spot | Laurel (California laurel)

DISEASE: Bacterial leaf spot

HOST: Laurel (California laurel) (Umbellularia californica)

PATHOGEN: Pseudomonas sp.

PATHOGEN SYNONYM: Pseudomonas lauracearum

SOURCE: W. Sinclair

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: Grape

Gall on base of 'Zinfandel' grape in California, where aerial galls are less common because of dry, hot weather.

Crown gall | Grape

DISEASE: Crown gall

HOST: Grape (Vitis vinifera 'Zinfandel')

PATHOGEN: Agrobacterium vitis

PATHOGEN SYNONYM: Rhizobium vitus

SOURCE: M. Schroth