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Individual and Combined Effects of Tobacco Mosaic Virus and Potato Virus Y on Burley Tobacco. R. C. Sievert, Research Plant Pathologist, Southern Region, ARS, USDA, Tobacco Experiment Station, Route 5, Box 113, Greeneville, Tennessee 37743; Phytopathology 63:697-698. Accepted for publication 18 December 1972. DOI: 10.1094/Phyto-63-697.

Inoculation with tobacco mosaic virus (TMV) or potato virus Y (PVY) reduced plant height, plant weight, and leaf weight of burley tobacco cultivars susceptible to these viruses. There was little difference in the reaction of the cultivars Burley 21, Burley 37, or Burley 49 to PVY, or in the effects of PVY or TMV in Burley 37. Simultaneous inoculation with TMV+PVY produced effects similar to inoculation with PVY alone in Burley 21 and Burley 49, but generally synergistic effects in Burley 37.

Additional keywords: virus interactions, multiple infection.