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RESULTS

(11)

DISEASE: Carrot yellows

HOST: Carrot

Flowers with shoot proliferation (witches’-broom) (left). Healthy flower (right). Virescence and phyllody of flower parts are common.

DISEASE: Carrot yellows

HOST: Carrot

Carrot with proliferation of roots. Initial symptoms include yellowing and narrowing of veins of young leaves. The entire leaf later becomes necrotic.

DISEASE: Varnish spot

HOST: Lettuce

Leaf with large brown and small, shiny, dark brown necrotic spots that spread in size and later dry out.

DISEASE: Varnish spot

HOST: Lettuce

Advanced stage of disease with large, brown necrotic areas. They most often are along veins. Outermost leaves of the head usually are not affected.

DISEASE: Xanthomonas wilt

HOST: Banana

Cross sections exposing discoloration of infected fruit.

DISEASE: Xanthomonas wilt

HOST: Banana

Sliced diseased stem exposing discolored vascular tissues and bacterial ooze.

DISEASE: Xanthomonas wilt

HOST: Banana

Longitudinal sections of fruit exposing brownish red diseased tissues.

DISEASE: Xanthomonas wilt

HOST: Banana

Banana stem with discoloration of vascular bundles and bacterial ooze.

DISEASE: Xanthomonas wilt

HOST: Banana

Banana with infected, blackened male flowers.