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Disease Detection and Losses

Effect of Ozone and Tobacco Streak Virus Alone and in Combination on Nicotiana tabacum. R. A. Reinert, Plant Pathologist, Agricultural Research Service, U. S. Department of Agriculture, North Carolina State University, Raleigh, NC 27607; G. V. Gooding, Jr., Plant Pathologist, Department of Plant Pathology, North Carolina State University. Phytopathology 68:15-17. Accepted for publication 14 June 1977. Copyright © 1978 The American Phytopathological Society, 3340 Pilot Knob Road, St. Paul, MN 55121. All rights reserved.. DOI: 10.1094/Phyto-68-15.

The percentage foliar injury on Nicotiana tabacum L. ‘Bel W₃’ infected by tobacco streak virus (TSV) and exposed to ozone (O₃) was greater than the additive percentage foliar injury to either TSV-infected or O₃-exposed plants. The fresh and dry weights of leaves, stems and roots of Bel W₃, exposed to O₃, infected with TSV, or both were significantly lower than the weights of the same parts from control plants. The growth-inhibiting effects of O₃ and TSV were only additive.