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RESULTS

(8)

DISEASE: Bacterial blight (Angular leaf spot)

HOST: Cotton

Leaf with advanced stage of blight.

DISEASE: Bacterial blight (Angular leaf spot)

HOST: Cotton

Highly susceptible (left) and resistant (right) cotton cultivars. The black arm stage of the disease is the most serious and occurs when bacteria invade petioles and then stems.

DISEASE: Bacterial blight (Angular leaf spot)

HOST: Cotton

Characteristic early symptoms are water-soaked leaf spots and water-soaking along veins.

DISEASE: Bacterial blight (Angular leaf spot)

HOST: Cotton

Leaf with dark, angular leaf spots. Systemic invasion causes blackening of midribs.

DISEASE: Olive knot

HOST: Olive

Multiple infections of young stems. The bacterium invades vascular tissues during certain times of the year and may be isolated from branches that appear healthy.

DISEASE: Olive knot

HOST: Olive

Tree with knots/galls on branches along with twig dieback, which is associated with knots. Fusarium and Diplodia spp. infect through knots and are thought to be main reason for dieback.

DISEASE: Olive knot

HOST: Olive

Multiple infections on olive branch. Knots at this stage begin to die from the outside in and are infected by several fungi.

DISEASE: Strawberry lethal decline

HOST: Strawberry

Diseased plant with bronzing of older leaves and upward rolling or cupping of younger leaves. Leaves are chlorotic on upper surfaces and reddish or purplish on lower surfaces. In time, the entire plant dies.