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Ozone Injury on Tobacco Seedlings can Predict Susceptibility in the Field. Gordon S. Taylor, The Connecticut Agricultural Experiment Station, New Haven 06504; Phytopathology 64:1047-1048. DOI: 10.1094/Phyto-64-1047.

Most tobacco plants which were resistant to injury by ozone as seedlings in the four- to six-leaf stage were also resistant as mature plants in the field, and those susceptible as seedlings were susceptible in the field. The correlation coefficient between ozone-sensitivity of seedlings and that of mature plants was .78. Using seedling resistance for screening would err more toward discarding potentially resistant individuals rather than saving susceptible ones. Valuable field space can be saved by screening for resistance at the seedling stage.