RESULTS

(3)

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DISEASE: Bacterial wilt

HOST: Squash

Field with severe symptoms of wilt. Foliage often is chlorotic and leaf margins may be chlorotic and necrotic before plant death. Bacterial ooze may be seen streaming from the xylem when infected stems are cut.

Bacterial wilt | Squash

DISEASE: Bacterial wilt

HOST: Squash (Cucurbita maxima)

PATHOGEN: Erwinia tracheiphila

SOURCE: B. Jacobsen, M. Shurtleff

DISEASE: Leaf scald

HOST: Sugarcane

Acute disease symptoms of wilting with upward curling of leaves with extensive necrosis.

Leaf scald | Sugarcane

DISEASE: Leaf scald

HOST: Sugarcane (Sacharum officinarum)

PATHOGEN: Xanthomonas albilineans

SOURCE: R. Birch

DISEASE: Phytoplasma disease

HOST: Daffodil

Phytoplasma disease of daffodil. Healthy (right).

Phytoplasma disease | Daffodil

DISEASE: Phytoplasma disease

HOST: Daffodil (Narcissus pseudonarcissus)

PATHOGEN: 'Candidatus Phytoplasma' sp.

PATHOGEN SYNONYM: Phytoplasma (undefined)

SOURCE: R. Raabe