RESULTS

(6)

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DISEASE: Bacterial leaf streak

HOST: Sorghum

Symptoms typically begin as water-soaked streaks expanding into irregular-shaped, reddish brown streaks. Symptoms are similar to bacterial leaf stripe.

Bacterial leaf streak | Sorghum

DISEASE: Bacterial leaf streak

HOST: Sorghum (Sorghum bicolor)

PATHOGEN: Xanthomonas vasicola pv. holcicola

SOURCE: J. Young

DISEASE: Bacterial leaf streak

HOST: Sorghum

Leaf with reddish purple, interveinal streaks.

Bacterial leaf streak | Sorghum

DISEASE: Bacterial leaf streak

HOST: Sorghum (Sorghum bicolor)

PATHOGEN: Xanthomonas vasicola pv. holcicola

SOURCE: L. Claflin

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.

Olive knot | Olive

DISEASE: Olive knot

HOST: Olive (Olea europaea)

PATHOGEN: Pseudomonas savastanoi pv. savastanoi

SOURCE: M. Schroth

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.

Olive knot | Olive

DISEASE: Olive knot

HOST: Olive (Olea europaea)

PATHOGEN: Pseudomonas savastanoi pv. savastanoi

SOURCE: M. Schroth

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.

Olive knot | Olive

DISEASE: Olive knot

HOST: Olive (Olea europaea)

PATHOGEN: Pseudomonas savastanoi pv. savastanoi

SOURCE: M. Schroth

DISEASE: Rugose leaf curl

HOST: Clover

Two rugose, distorted white clover leaves and a healthy leaf. Rugose leaf curl is caused by an unidentified phloem-infecting bacterium.

Rugose leaf curl | Clover

DISEASE: Rugose leaf curl

HOST: Clover (Trifolium repens)

PATHOGEN: Phloem-infecting bacterium

SOURCE: D. Teakle