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RESULTS

(8)

DISEASE: Bacterial blast and black pit

HOST: Citrus (Lemon)

The term "black pit" refers to black lesions on fruit, which may be specks or large, sunken pits as seen here. They also may be light tan, later becoming reddish brown to black.

DISEASE: Bacterial blast and black pit

HOST: Citrus (Lime)

Characteristic symptoms of brownish black lesions on twigs and leaves (blast), starting with infection of petioles. Black pit refers to brown to black sunken spots on fruit, 5 to 20 mm in diameter.

DISEASE: Bacterial foot rot

HOST: Rice

The disease causes sheaths to turn dark brown and rot; dead leaves droop. Nodes, culms, and crowns also decay, and infected tillers are easily detached from the crown. Culms and internodes turn black.

DISEASE: Bacterial foot rot

HOST: Rice

Decayed culms (right) and healthy culms (left). Leaf sheaths of infected plants exhibit dark brown decay and attached leaves turn yellow and wilt.

DISEASE: Purple stain

HOST: Papaya

Purple pigmentation of internal tissues near peduncle end of fruits. Pigmentation and yellow translucence of papaya flesh are more evident of fruit on right.

DISEASE: Purple stain

HOST: Papaya

Purple pigmentation of internal tissues.

DISEASE: Purple stain

HOST: Papaya

Another view of purple discoloration at peduncle end. Bacteria are found in vascular tissues and latex ducts.

DISEASE: Purple stain

HOST: Papaya

Cross section of fruit exhibiting purplish discoloration in latex ducts.