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RESULTS

(8)

DISEASE: Brown line and decline

HOST: Almond

Stunted and yellowish diseased tree. Such trees produce little to no growth and decline rapidly.

DISEASE: Brown line and decline

HOST: Almond

Bark was split laterally at graft union, revealing line of necrotic tissue that extends into woody cortical tissues.

DISEASE: Brown line and decline

HOST: Almond

Shriveled nuts from infected tree. Two healthy kernels (bottom left).

DISEASE: Marginal leaf blight

HOST: Lettuce

Marginal leaf blight first appears as slimy wilting of leaf margins. Small, reddish lesions may be seen on leaf blades. Infected tissues turn brown to black in time.

DISEASE: Stewart's wilt

HOST: Corn (Maize)

Wilted seedlings resulting from systemic invasion.

DISEASE: Stewart's wilt

HOST: Corn (Maize)

Leaf blight is the dominant symptom of this disease. Lesions begin as gray-green to yellow in color and turn brown in time.

DISEASE: Stewart's wilt

HOST: Corn (Maize)

Flea beetle and scars caused by feeding damage. The beetle is a vector and is an overwintering site for the bacterium.

DISEASE: Stewart's wilt

HOST: Corn (Maize)

Young wilted plant with pale green and yellow streaks on leaves.