Pierce's Disease of Grapevines: Isolation of the Causal Bacterium

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Science  06 Jan 1978:
Vol. 199, Issue 4324, pp. 75-77
DOI: 10.1126/science.199.4324.75


A Gram-negative, rod-shaped bacterium has been consistently isolated from grapevines with Pierce's disease. Grapevines inoculated with the bacterium developed Pierce's disease, and the bacterium was reisolated from the plants. The bacterium was serologically and ultrastructurally indistinguishable from the one in naturally infected plants, and also indistinguishable from a bacterium isolated from almonds with almond leaf scorch disease.

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