RESULTS

(14)

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DISEASE: Bacterial flower stalk and leaf necrosis

HOST: Onion

Dark, rotted areas of stalk and leaves caused by systemic invasion of the pathogen.

Bacterial flower stalk and leaf necrosis | Onion

DISEASE: Bacterial flower stalk and leaf necrosis

HOST: Onion (Allium cepa)

PATHOGEN: Pseudomonas marginalis pv. marginalis

SOURCE: S. Mohan

DISEASE: Bacterial flower stalk and leaf necrosis

HOST: Onion

Gray-brown rot of onion after inoculation. Disease starts as small, water-soaked lesions that later develop into slimy, gray-brown rot. The disease progresses downward from the stalk and may rot the entire bulb.

Bacterial flower stalk and leaf necrosis | Onion

DISEASE: Bacterial flower stalk and leaf necrosis

HOST: Onion (Allium cepa)

PATHOGEN: Pseudomonas marginalis pv. marginalis

SOURCE: R. Gitaitis

DISEASE: Bacterial flower stalk and leaf necrosis

HOST: Onion

Leaves with necrosis and rot. The common name for this disease is the same as those used for two other diseases. Also, another common name for this disease is bacterial soft rot.

Bacterial flower stalk and leaf necrosis | Onion

DISEASE: Bacterial flower stalk and leaf necrosis

HOST: Onion (Allium cepa)

PATHOGEN: Pseudomonas marginalis pv. marginalis

SOURCE: S. Mohan

DISEASE: Bacterial speck

HOST: Tomato

Leaf with typical brown to black lesions without halos, an early stage of disease.

Bacterial speck | Tomato

DISEASE: Bacterial speck

HOST: Tomato (Lycopersicon esculentum)

PATHOGEN: Pseudomonas syringae pv. tomato

SOURCE: S. Thomson

DISEASE: Bacterial speck

HOST: Tomato

Leaves with spots, some surrounded by chlorotic zones.

Bacterial speck | Tomato

DISEASE: Bacterial speck

HOST: Tomato (Lycopersicon esculentum)

PATHOGEN: Pseudomonas syringae pv. tomato

SOURCE: R. Gitaitis

DISEASE: Bacterial speck

HOST: Tomato

Curling leaves with large, blackish lesions. Later, yellowing occurs around lesions.

Bacterial speck | Tomato

DISEASE: Bacterial speck

HOST: Tomato (Lycopersicon esculentum)

PATHOGEN: Pseudomonas syringae pv. tomato

SOURCE: M. Schroth

DISEASE: Bacterial speck

HOST: Tomato

Infection of flowers, peduncles, and stems.

Bacterial speck | Tomato

DISEASE: Bacterial speck

HOST: Tomato (Lycopersicon esculentum)

PATHOGEN: Pseudomonas syringae pv. tomato

SOURCE: D. Cupples

DISEASE: Bacterial speck

HOST: Tomato

Field view of severely diseased plants.

Bacterial speck | Tomato

DISEASE: Bacterial speck

HOST: Tomato (Lycopersicon esculentum)

PATHOGEN: Pseudomonas syringae pv. tomato

SOURCE: M. Schroth

DISEASE: Bacterial speck

HOST: Tomato

Green fruit with small, sunken, black lesions. Raised centers are surrounded by dark green halos.

Bacterial speck | Tomato

DISEASE: Bacterial speck

HOST: Tomato (Lycopersicon esculentum)

PATHOGEN: Pseudomonas syringae pv. tomato

SOURCE: S. Thomson