A New Pathovar, Pseudomonas Syringae Pv. Alisalensis Pv
e-Xtra* A New Pathovar, Pseudomonas syringae pv. alisalensis pv. nov., Proposed for the Causal Agent of Bacterial Blight of Broccoli and Broccoli Raab N. A. Cintas, USDA, ARS, PWA, 1636 E. Alisal Ave., Salinas, CA 93905; S. T. Koike, University of California, Cooperative Extension, Salinas 93905; and C. T. Bull, USDA, ARS, PWA, 1636 E. Alisal Ave., Salinas, CA 93905 year. The second crucifer crop can become ABSTRACT infected when planted in residue of a pre- Cintas, N. A., Koike, S. T., and Bull, C. T. 2002. A new pathovar, Pseudomonas syringae pv. vious crop that had one of the bacterial alisalensis pv. nov., proposed for the causal agent of bacterial blight of broccoli and broccoli blights. The broccoli raab bacterial blight raab. Plant Dis 86:992-998. pathogen caused disease in a second plant- ing of broccoli raab up to 4 months after The etiology of three foliar bacterial diseases of crucifers and the relationships between their incorporating the initial infected crop (7). causal agents were evaluated. Data from LOPAT, carbon utilization tests, and fatty acid analysis Because the pathogens of broccoli, broc- indicated that bacterial blights of broccoli and broccoli raab, and leaf spot of broccolini, were coli raab, and broccolini have not been caused by strains of Pseudomonas syringae. Data from phage sensitivity, ice nucleation, single carbon source utilization, Polymerase chain reaction using BOXA1R primer (BOX-PCR), and completely characterized, it is not known if host range analyses were identical for the pathogen causing leaf spot of broccolini and P. syrin- they have the same or similar host ranges.
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