RESULTS

(4)

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DISEASE: Periwinkle wilt

HOST: Periwinkle

Infected plants with stunting and sparse foliage (center and right).

Periwinkle wilt | Periwinkle

DISEASE: Periwinkle wilt

HOST: Periwinkle (Vinca sp.)

PATHOGEN: Xylella fastidiosa

SOURCE: R. McCoy, M. Davis

DISEASE: Periwinkle wilt

HOST: Periwinkle

Draeculacephala minerva, leafhopper vector of Xylella fastidiosa on plants such as periwinkle and watercress.

Periwinkle wilt | Periwinkle

DISEASE: Periwinkle wilt

HOST: Periwinkle (Vinca sp.)

PATHOGEN: Xylella fastidiosa

SOURCE: J. Clark, A. Purcell, M. Davis

DISEASE: Slippery skin

HOST: Onion

Rot progresses from the top of infected scales and eventually internal tissues rot. In early stages, the only external symptoms may be softening of the neck.

Slippery skin | Onion

DISEASE: Slippery skin

HOST: Onion (Allium cepa)

PATHOGEN: Burkholderia gladioli pv. alliicola

PATHOGEN SYNONYM: Pseudomonas gladioli pv. alliicola

SOURCE: H. Schwartz

DISEASE: Xanthomonas leaf spot

HOST: Cabbage

Cabbage leaf with small lesions. Lesions may enlarge and coalesce, causing distortion. Stem lesions are black and sunken and may cause death of the plants.

Xanthomonas leaf spot | Cabbage

DISEASE: Xanthomonas leaf spot

HOST: Cabbage (Brassica oleracea var. capitata)

PATHOGEN: Xanthomonas campestris pv. raphani

SOURCE: R. Gitaitis