University of California

Bacterial blight eliminated from California cotton gins


W. C. Schnathorst

Author Affiliations

W. C. Schnathorst is USDA Research Plant Pathologist and Associate in the Experiment Station, Department of Plant Pathology, University of California, Davis.

Publication Information

Hilgardia 21(12):11-11. DOI:10.3733/ca.v021n12p11. December 1967.

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The bacterial blight pathogen, Xanthomonas malvacearum on cotton, Gossypium hirsutum, has not been found in San Joaquin Valley fields since 1961. Its ability to survive for up to seven years in dried cotton refuse might lead to long-term contamination of cotton gins, however. This would in turn provide an opportunity for the pathogen to again contaminate planting seed, with consequent recurrence of the disease in the field. Field eradication, dilution of contaminated refuse, and decreasing viability of the pathogen with age were expected to result in the disappearance of the pathogen from cotton gins in California. This report deals with attempts to determine whether contamination was still present, particularly in gins from which X. malvacearum had previously been isolated—as well as a large number of other gins in the area where bacterial blight was once prevalent.

Schnathorst W. 1967. Bacterial blight eliminated from California cotton gins. Hilgardia 21(12):11-11. DOI:10.3733/ca.v021n12p11
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