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This disease has appeared in some romaine plantings in southeastern Imperial County,
California and in Yuma, Arizona in past years. Lettuce dieback occurs in other lettuce
production regions in California as well. Initial symptoms on infected plants consist
of extensive yellowing of the outermost leaves, with the younger inner leaves usually
remaining dark green in color. Dead spots
To contact Mike Matheron go to: matheron@ag.arizona.edu.
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For questions or comments on any of the topics please contact Marco Pena at the Yuma Agricultural Center.
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