Screening for Resistance to Cassava Bacterial Blight. J. C. Lozano, Pathologist, CIAT Cassava Production System Program, Centro Internacional de Agricultura Tropical (CIAT), Cali, Colombia. R. Laberry, Pathologist, CIAT Cassava Production System Program, Centro Internacional de Agricultura Tropical (CIAT), Cali, Colombia. Plant Dis. 66:316-318. Accepted for publication 11 June 1981. Copyright 1982 American Phytopathological Society. DOI: 10.1094/PD-66-316.

Resistance to Xanthomonas campestris pv. manihotis in cassava (Manihot esculenta) was identified during four cycles of field evaluation in an area where cassava bacterial blight is endemic. Some genotypes that were rated resistant based on foliar symptoms produced under controlled conditions were eliminated because of infection after two, three, or four cycles of continuous cultivation.

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