Advertisement

Potato Research

, Volume 31, Issue 3, pp 401–404 | Cite as

Evaluation in pot and field trials of resistance of potato cultivars and breeding lines to common scab caused byStreptomyces scabies

  • Laetitia Marais
  • René Vorster
Short Communication

Summary

The resistance to common scab of nine cultivars and eight advanced breeding lines of potatoes, fiveSolanum andigenum Juz. et Buk. clones, and three potato breeding lines selected for resistance to common scab, was investigated in a field and a pot trial. In the pot trial potaroes were planted in inoculated coarse river sand in plastic pots (150 mm in diameter) placed on irrigated subsoil in a glassfibre house. In a field trial potatoes were planted in an artificially infested field. The harvested tubers were scored individually for scab incidence according to two scales, viz. a 1–5 point scale for percentage surface covered with scab and a 1–3 point scale for lesion type. A scab index value was calculated for each tuber. A significant correlation coefficient of 0.82 was obtained for the results of the two tests.

Additional keywords

Solanum tuberosum Solanum andigenum scab index correlation coefficient 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bjor, T. & L. Roer, 1980. Testing the resistance of potato varieties to common scab.Potato Research 23: 33–47.Google Scholar
  2. Davis, J. R., C. E. Dallimore, J. G. Garner & R. H. Callihan, 1971. The efficacy of gypsum, sulphur, Terrachlor and Terrachlor super-X for potato scab control.American Potato Journal 48: 305.Google Scholar
  3. Davis, J. R., J. G. Garner & R. H. Callihan, 1974. Effects of gypsum, sulphur, Terrachlor and Terrachlor-X for scab control.American Potato Journal 51: 36–43.Google Scholar
  4. Hooker, W. J., 1950. A technique for observing tuber enlargement and scab development in potatoes.Phytopathology 40: 390–391.Google Scholar
  5. Labruyère, R. E., 1971. Common scab and its control in seed potato crops.Agricultural Research Reports 767: 71 pp.Google Scholar
  6. Lapwood, D. H., L. W. Wellings & J. H. Hawkins, 1971. Irrigation as a practical means to control potato common scab (Streptomyces scabies).Plant Pathology 20: 157–163.Google Scholar
  7. Large, E. C. & June K. Honey, 1955. Survey of common scab of potatoes in Great Britain, 1952 and 1953.Plant Pathology 4: 1–8.Google Scholar
  8. Lauer, F. J. & C. J. Eide, 1963. Evaluation of parent clones of potato for resistance to common scab by the ‘highest scab’ method.European Potato Journal 6: 35–44.Google Scholar
  9. Leach, J. G., F. A. Kranz, P. Decker & H. Mattson, 1938. The measurement and inheritance of scab resistance in selfed and hybrid progenies of potatoes.Journal of Agricultural Research 56: 843–854.Google Scholar
  10. McKee, R. K., 1958. Assessment of the resistance to common scab.European Potato Journal 1: 65–80.Google Scholar
  11. McKee, R. K. (1963). Scab resistance of potato varieties.Plant Pathology 12: 106–109.Google Scholar
  12. Wiersema, H. T., 1970. A reliable method for testing resistance in the greenhouse.Proceedings. Fourth Triennial Conference, European Association for Potato Research (Brest, 1969): 26.Google Scholar

Copyright information

© Kluwer Academic Publishers 1988

Authors and Affiliations

  • Laetitia Marais
    • 1
  • René Vorster
    • 1
  1. 1.Vegetable and Ornamental Plant Research InstitutePretoriaSouth Africa

Personalised recommendations