RESULTS

(3)

FILTER

DISEASE: Bacterial wilt

HOST: Squash

Field with severe symptoms of wilt. Foliage often is chlorotic and leaf margins may be chlorotic and necrotic before plant death. Bacterial ooze may be seen streaming from the xylem when infected stems are cut.

Bacterial wilt | Squash

DISEASE: Bacterial wilt

HOST: Squash (Cucurbita maxima)

PATHOGEN: Erwinia tracheiphila

SOURCE: B. Jacobsen, M. Shurtleff

DISEASE: Crown gall

HOST: Aspen

Aspen with large, encrusted gall.

Crown gall | Aspen

DISEASE: Crown gall

HOST: Aspen (Populus sp.)

PATHOGEN: Agrobacterium tumefaciens

PATHOGEN SYNONYM: Rhizobium sp.

SOURCE: S. Thomson

DISEASE: Slime flux

HOST: Casuarina

Slime flux occurs on a number of tree species and is always associated with bacteria and yeast. However, the causal agent has not been identified.

Slime flux | Casuarina

DISEASE: Slime flux

HOST: Casuarina (Casuarina equisetifolia)

PATHOGEN: Causal agent unknown

SOURCE: W. Sinclair