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RESULTS

(37)

DISEASE: Bois noir disease

HOST: Grape

A typical symptom of disease is uneven lignification of infected branches, resulting in a mix of brown and green patches.

DISEASE: Bois noir disease

HOST: Grape

Infected plant with typical symptoms of rolling, triangular-trapezoid-shaped leaves with desiccated appearance.

DISEASE: Bois noir disease

HOST: Grape

Hyalesthes obsoletus, a cicada, the only defined vector of the phytoplasma causing bois noir disease of grapevines.

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.

DISEASE: Citrus canker

HOST: Citrus (Orange)

Leaves with necrotic lesions and yellow halos.

DISEASE: Citrus canker

HOST: Citrus (Orange)

Fruit with corky, raised lesions surrounded by yellow tissues. Cankers on leaves also have yellow halos.

DISEASE: Citrus canker

HOST: Citrus (Orange)

Symptoms of severe disease are defoliation and sparseness of foliage.