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ARS Home » Pacific West Area » Salinas, California » Crop Improvement and Protection Research » Research » Publications at this Location » Publication #256454
Title: First report of bacterial blight of Brussels sprouts (Brassica oleracea L. var. gemmifera) caused by Pseudomonas cannabina pv. alisalensis in California

Author
item Bull, Carolee
item MAUZEY, STACY - California State University
item KOIKE, STEVE - University Of California - Cooperative Extension Service

Submitted to: Plant Disease
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 8/29/2010
Publication Date: 8/29/2010
Citation: Bull, C.T., Mauzey, S.J., Koike, S.T. 2010. First report of bacterial blight of Brussels sprouts (Brassica oleracea L. var. gemmifera) caused by Pseudomonas cannabina pv. alisalensis in California. Plant Disease. 94:1375.

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 Brussels sprouts was identified and the bacterial pathogen causing the disease was identified. This is the first report of this pathogen on Brussels sprouts anywhere in the world. 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 commercial Brussels sprout (Brassica oleracea L. var. gemmifera) transplant production 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 Brussels sprouts. This research expands the known natural host range of this pathogen.