RESULTS

(5)

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DISEASE: Apple proliferation

HOST: Apple

Enlarged stipules on leaf. Witches'-brooms, rosettes, and enlarged stipules are the most reliable symptoms for identification.

Apple proliferation | Apple

DISEASE: Apple proliferation

HOST: Apple (Malus domestica 'Granny Smith')

PATHOGEN: 'Candidatus Phytoplasma mali'

PATHOGEN SYNONYM: Phytoplasma Apple proliferation group

SOURCE: M. Wolf, W. Schweigkofler

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.

Aster yellows | Squash

DISEASE: Aster yellows

HOST: Squash (Cucurbita sp.)

PATHOGEN: 'Candidatus Phytoplasma asteris'

PATHOGEN SYNONYM: Phytoplasma Aster yellows group

SOURCE: S. Miller

DISEASE: Bacterial fruit blotch

HOST: Watermelon

Symptoms of external disease of mature watermelon.

Bacterial fruit blotch | Watermelon

DISEASE: Bacterial fruit blotch

HOST: Watermelon (Citrullus lanatus)

PATHOGEN: Acidovorax citrulli

PATHOGEN SYNONYM: Acidovorax avenae subsp. citrulli

SOURCE: R. X. Latin

DISEASE: Bacterial fruit blotch

HOST: Watermelon

Diseased watermelon with copious white foam.

Bacterial fruit blotch | Watermelon

DISEASE: Bacterial fruit blotch

HOST: Watermelon (Citrullus lanatus)

PATHOGEN: Acidovorax citrulli

PATHOGEN SYNONYM: Acidovorax avenae subsp. citrulli

SOURCE: R. Gitaitis

DISEASE: Bacterial leaf and stem necrosis

HOST: Watermelon

Seedlings with necrotic leaves and water-soaked stems.

Bacterial leaf and stem necrosis | Watermelon

DISEASE: Bacterial leaf and stem necrosis

HOST: Watermelon (Citrullus lanatus)

PATHOGEN: Pseudomonas viridiflava

SOURCE: Y. Aysan