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United States Department of Agriculture

Agricultural Research Service

Research Project: CONTROL OF PATHOGENS IN STRAWBERRY AND VEGETABLE PRODUCTION SYSTEMS

Location: Crop Improvement and Protection Research

Title: First report of bacterial blight of cabbage (Brassica oleracea var. capitata L.) caused by Pseudomonas cannabina pv. alisalensis in California

Authors
item Mauzey, Stacy -
item Koike, Steve -
item Bull, Carolee

Submitted to: Plant Disease
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: October 15, 2011
Publication Date: January 1, 2011
Repository URL: http://DOI: 10.1094/PDIS-09-10-0642
Citation: Mauzey, S., Koike, S.T., Bull, C.T. 2011. First report of bacterial blight of cabbage (Brassica oleracea var. capitata L.) caused by Pseudomonas cannabina pv. alisalensis in California. Plant Disease. 95(1):71.

Interpretive Summary: Vegetable transplants represent a 53 million dollar industry in Monterey County California and helps growers supply healthy green vegetables to US markets. Plant pathogens can limit the supply of transplants of this and other crucifers to growers thus limiting profits of producers and production The first step in reducing the impact of emerging plant diseases on crops is to identify the pathogen causing the disease. In this study, a new disease on cabbage was identified and the bacterial pathogen causing the disease was identified. This is the first report of this pathogen on cabbage in California. This information will help producers make crop production choices to help reduce spread of the pathogen from one susceptible crop to another can use this information.

Technical Abstract: A novel bacterial leaf blight was seen in field grown cabbage (Brassica oleracea var. capitata L.) in Monterey County, California in 2006. Koch’s postulates were completed and etiology of the pathogen was determined. Physiological and molecular characterization showed that the pathogen was Pseudomonas cannabina pv. alisalensis. This is the first report of P. cannabina pv. alisalensis causing a disease on commercially grown cabbage. This research expands the number of crops from which this pathogen has been isolated in California.

Last Modified: 9/1/2014