RESULTS

(3)

FILTER

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

DISEASE: Fire blight

HOST: Pear

Blossom blight is first seen as water-soaked spots that rapidly turn brown to black as the disease becomes systemic and progresses down the shoot.

Fire blight | Pear

DISEASE: Fire blight

HOST: Pear (Pyrus communis)

PATHOGEN: Erwinia amylovora

SOURCE: S. Thomson

DISEASE: Pseudomonas leaf spot

HOST: Primrose

Leaf with brownish red spots and reddening of adjacent areas. Disease begins as small, water-soaked lesions that later coalesce into large necrotic spots.

Pseudomonas leaf spot | Primrose

DISEASE: Pseudomonas leaf spot

HOST: Primrose (Primula sp.)

PATHOGEN: Pseudomonas syringae pv. primulae

SOURCE: APS