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RESULTS

(10)

DISEASE: Bacterial stem rot

HOST: Dieffenbachia

Dieffenbachia with rot and decay of stem and leaf tissues.

DISEASE: Bacterial stem rot

HOST: Dieffenbachia

Dieffenbachia with wilted and rotted leaves.

DISEASE: Bacterial stem rot

HOST: Dieffenbachia

Cross section of stem exposing rotted tissues.

DISEASE: Bacterial stem rot

HOST: Dieffenbachia

Leaf with rot and wilt.

DISEASE: Bacterial wilt

HOST: Alfalfa

Longitudinal section of defined brown gum pockets on inner surface of root bark.

DISEASE: Bacterial wilt

HOST: Alfalfa

Infected plant (left) with typical symptoms of stunting and chlorosis. Other characteristic symptoms are spindly stems and small distorted leaflets. Healthy plant (right).

DISEASE: Bacterial wilt

HOST: Alfalfa

Diseased plant with chlorotic leaves.

DISEASE: Bacterial wilt

HOST: Alfalfa

Cross sections of diseased roots with defined brown gum pockets on inner surface of bark. Healthy root (upper left). Other sections represent increases in disease severity.

DISEASE: Goss's bacterial wilt and blight

HOST: Corn (Maize)

Wilted, dying plants. Leaves have gray to light yellow stripes and irregular margins that follow leaf veins. Systemically infected plants usually have orange vascular bundles.