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Some variations in symptomatology and transmission of leafroll in potato

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Summary

Plants of potato seedling X927-3 that had been exposed to natural infection with the leaf roll virus over a 12-year period before becoming diseased were found to be infected with it. Initial symptoms of leaf roll in plants of X927-3 were persistent and resembled initial infection of potato plants with some “yellows” viruses. The second-generation symptom types expressed by diseased plants were shown to be induced, in part, by the leaf roll virus. All virus isolations from diseased plants of seedling X927-3 induced a response inP. floridana similar to that caused by the mild strain 1. Evaluation of the stock source of the leaf roll virus maintained in Katahdin showed 3 virus strains to be present in the inoculum material. Comparative studies of the X927-3 isolate with the known strains indicated that the X927-3 isolate and the mild strain 1 caused similar reactions inP. floridana plants ; however, the X927-3 isolate was not as easily transmitted by aphids or by grafting, and it did not become systemic as rapidly in certain hosts as did the remaining 3 virus strains.

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Literature Cited

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Authors and Affiliations

  1. Horticultural Crops Research Branch, Agricultural Research Service, United States Department of Agriculture, Washington, D. C.

    R. E. Webb (Plant Pathologist), E. S. Schultz (Principal Pathologist) & R. V. Akeley (Senior Horticulturist)

  2. Beltsville, Md.

    R. E. Webb (Plant Pathologist) & E. S. Schultz (Principal Pathologist)

  3. Presque Isle, Me.

    R. V. Akeley (Senior Horticulturist)

Authors
  1. R. E. Webb
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  2. E. S. Schultz
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  3. R. V. Akeley
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Webb, R.E., Schultz, E.S. & Akeley, R.V. Some variations in symptomatology and transmission of leafroll in potato. American Potato Journal 32, 60–66 (1955). https://doi.org/10.1007/BF02851217

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  • DOI: https://doi.org/10.1007/BF02851217

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