Skip to main content
ARS Home » Pacific West Area » Salinas, California » Crop Improvement and Protection Research » Research » Publications at this Location » Publication #296176

Title: Bacterial Leaf Spot of Lettuce: Request for Samples

item KOIKE, STEVEN - University Of California
item Bull, Carolee

Submitted to: Electronic Publication
Publication Type: Other
Publication Acceptance Date: 7/16/2013
Publication Date: 7/16/2013
Citation: Koike, S.T., Bull, C.T. 2013. Bacterial leaf spot of lettuce: Request for samples. University of California Extension in Monterey County Blog. Available:

Interpretive Summary:

Technical Abstract: Bacterial leaf spot of lettuce caused by by Xanthomonas campestris pv. vitians has been affecting coastal California crops for many years and has become a chronic problem. Differences in pathogen genotypes have been demonstrated and correlated to disease responses on resistant and susceptible cultivars. In California the deployed lettuce germplasm is resistant to the strains of the pathogen formerly collected in California. This publication is a request for samples of the disease from lettuce growing regions in California to determine if the genotypes that can overcome this resistance is moving into the region.