VIEW ARTICLE

Evaluation of Various Control Measures for Cotton Boll Rot. R. W. Roncadori, Associate Professor, Department of Plant Pathology and Plant Genetics, University of Georgia, Athens 30602; S. M. Mc Carter(2), and J. L. Crawford(3). (2)Associate Professor, Department of Plant Pathology and Plant Genetics, University of Georgia, Athens 30602; (3)Extension Plant Pathologist, Cooperative Extension Service, University of Georgia, Tifton 31794. Phytopathology 65:567-570. Accepted for publication 10 December 1974. DOI: 10.1094/Phyto-65-567.

Four control measures for cotton boll rot were tested individually and in various combinations in field plots. Best control was obtained with an experimental line containing disease-escape and disease-resistance traits. Boll rot incidence in the experimental line was 70 to 72% less than that occurring in solid plantings of two commercial cultivars, Coker 201 and Deltapine 16. Erratic control was obtained with 2 × 2 skip-row plantings (leaving alternate pairs of rows vacant) and reduced nitrogen rates. Application of a protectant fungicide to the bolls was ineffective in controlling decay. Likewise, combinations of various control measures did not improve their performance over the best single treatment. Seed-cotton yield was highest in skip-row plantings, and was not significantly affected by other control measures or their combinations.