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RESULTS

(26)

DISEASE: Australian citrus dieback

HOST: Citrus (Lime)

Severe decline, a late stage of disease. The disease spreads slowly in mature trees, progressing faster in young trees.

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 fruit blotch

HOST: Cantaloupe

Early stage of disease with discolored blotches on the surface.

DISEASE: Bacterial fruit blotch

HOST: Cantaloupe

View of disease path from rind to internal rotting of melon.

DISEASE: Bacterial fruit blotch

HOST: Cantaloupe

Leaf spot stage. Lesions start small and may coalesce, forming large, brown necrotic areas.

DISEASE: Bacterial wilt

HOST: Cantaloupe

Cantaloupe field with severe destruction from bacterial wilt (left), less on right.

DISEASE: Citrus canker

HOST: Citrus (Orange)

Leaf with leaf miner tunnels and numerous cankerlike lesions.

DISEASE: Citrus canker

HOST: Citrus (Orange)

Upper side of leaves with corky, raised lesions surrounded by yellow halos, a late stage of disease. Such infections usually are visible on lower sides of leaves first and soon after on upper sides.

DISEASE: Citrus canker

HOST: Citrus (Orange)

Yellowish halos are seen around lesions on the upper leaf surface, whereas lesions on the lower surface are more corky in appearance and have sunken centers without halos.