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RESULTS

(11)

DISEASE: Bacterial canker and blast

HOST: Apricot

Apricot with typical reddish brown-discolored tissues beneath the bark and gumming around infected areas.

DISEASE: Bacterial canker and blast

HOST: Apricot

Young infected twig with droplets of bacterial ooze on stem.

DISEASE: Bacterial canker and blast

HOST: Apricot

Bacterial canker has many symptoms. Typical symptoms are brown, sometimes reddish brown, internal tissues and rough, cracked bark.

DISEASE: Bacterial canker and blast

HOST: Apricot

Infected apricot with sparse foliage (some twigs with no foliage) and a discolored area exposed where bark was removed.

DISEASE: Bacterial canker and blast

HOST: Apricot

Fruit spot phase with numerous reddish necrotic spots.

DISEASE: Bacterial pustule

HOST: Soybean

Early symptoms are minute, pale green spots on young leaves. Later, small pustules form in the center of spots, best observed on underside of leaves. Spots vary in size and darken with age and lesions coalesce. Dead areas are torn away by wind.

DISEASE: Elm yellows

HOST: Elm

Symptoms of elm yellows occasionally appear on one branch before others, but more often they involve the entire crown.

DISEASE: Elm yellows

HOST: Elm

Diseased twig (right) with epinasty, chlorosis, and yellowing of leaves. Sometimes both yellow and green leaves occur on same branch. Healthy branch (left).

DISEASE: Elm yellows

HOST: Elm

Branches with butterscotch discoloration (center) and necrotic flecks in phloem and vascular cambium (right). Healthy branch (left). Sudden wilt and browning is common with small trees.