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RESULTS

(23)

DISEASE: Aster yellows

HOST: Squash

Diagnostic characteristics for the disease are yellowing of young leaves, proliferation of secondary shoots, and rigid erect habit. Leaves are misshapen and smaller than normal and have stiff, thick laminae.

DISEASE: Bacterial leaf blight

HOST: Sorghum

The disease begins with interveinal water-soaked streaks that broaden into irregularly shaped areas with necrotic centers and red margins.

DISEASE: Bacterial leaf spot (Head rot)

HOST: Lettuce

Leaf with black, greasy spots that tend to be vein delimited. Lesions begin as small, angular, water-soaked lesions that coalesce, resulting in large necrotic areas.

DISEASE: Bacterial leaf spot

HOST: Sorghum

Leaf with red and necrotic streaks along veins.

DISEASE: Bacterial leaf spot

HOST: Sorghum

Clustering of small purplish lesions in localized region of leaf.

DISEASE: Bacterial leaf streak

HOST: Sorghum

Symptoms typically begin as water-soaked streaks expanding into irregular-shaped, reddish brown streaks. Symptoms are similar to bacterial leaf stripe.

DISEASE: Bacterial leaf streak

HOST: Sorghum

Leaf with reddish purple, interveinal streaks.

DISEASE: Bacterial leaf stripe

HOST: Sorghum

Diseased leaf with linear, interveinal stripes that are purplish red. They also can be yellow, tan, or purple depending upon host reaction.

DISEASE: Bacterial leaf stripe

HOST: Sorghum

Leaf with reddish brown stripes between veins.