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Science 28 June 1974:
Vol. 184. no. 4144, pp. 1375 - 1377
DOI: 10.1126/science.184.4144.1375
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Articles

Pierce's Disease of Grapevines: Evidence for a Bacterial Etiology

Jaime G. Auger 1, Thomas A. Shalla 1, and Clarence I. Kado 1

1 Department of Plant Pathology, University of California, Davis 95616

A Gram-positive, rod-shaped bacterium was isolated and grown in pure culture on artificial mediums from the leafhopper Draeculacephala minerva Ball which had fed on plants infected with Pierce's disease. The bacterial culture was injected into uncontaminated leafhoppers which were than allowed to feed on healthy grapevines. After exposure to these leafhoppers, typical symptoms of Pierce's disease developed; however, no symptoms developed on plants exposed to leafhoppers injected with sterile culture medium. The same organism was reisolated from the experimentally inoculated plants. Electron microscopic examination of these infected plants revealed bacterial cells localized in the xylem tissues. No such cells were seen in healthy or control plants.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Pierce's disease of grapevines: isolation of the causal bacterium..
M. J. DAVIS, A. H. PURCELL, and S. V. THOMSON (1978)
Science 199, 75-77
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Science. ISSN 0036-8075 (print), 1095-9203 (online)