Skip to main content
SpringerLink
Log in

Effect of inoculum concentration ofPhytophthora infestans on potato late blight

  • Published:
American Potato Journal Aims and scope Submit manuscript

Abstract

Zoospore suspensions ofPhytophthora infestans applied to potato cultivars in the field with an exponential inoculum sprayer resulted in defoliation within a range of severity that was log-normal with respect to inoculum concentration. Regression lines for different cultivars differed in position and, depending upon moisture conditions, slope, indicating that the cultivars differed in resistance to penetration and to invasion of tissue by the pathogen.

Resumen

Suspensiones de zoosporas del hongoPhytophthora infestans applicadas a campo sobre cultivares de patata mediante un pulverizador exponencial de inócula, dieron como resultado defoliación dentro de un rango de severidad que fue logarítmico con respecto a la concentración de inócula. Las líneas de regresión para diferentes cultivares variaron con respecto a posición y, dependiendo de las condiciones de humedad, con respecto a inclinación o pendiente, lo que indica que dichos cultivares diferián en resistencia a la penetración y invasión de los tejidos por el patógens.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

Literature Cited

  1. Banttari, E. E. and R. D. Wilcoxson. 1964. Relation of nutrients in inoculum and inoculum concentration to severity of spring black stem of alfalfa. Phytopathology 54:1048–1052.

    Google Scholar 

  2. Barratt, W. R. and J. G. Horsfall. 1945. An improved grading system for measuring plant diseases. Phytopathology 35:655 (Abstr.).

    Google Scholar 

  3. Davidson, A. D. and E. K. Vaughan. 1964. Effect of uredospore concentration on determination of races ofUromyces phaseoli var.phaseoli. Phytopathology 54:336–338.

    Google Scholar 

  4. Eide, C. J. and F. I. Lauer. 1967. Testing potatoes for field resistance to late blight. Am Potato J 44:9–16.

    Google Scholar 

  5. Guzman-N., Julia. 1964. Nature of partial resistance of certain clones of threeSolanum species toPhytothora infestans. Phytopathology 54:1398–1404.

    Google Scholar 

  6. Hodgson, W. A. 1961. Laboratory testing of the potato for partial resistance toPhytophthora infestans. Am Potato J 38:259–264.

    Google Scholar 

  7. Horsfall, J. G. and A. E. Dimond. 1963. A perspective on inoculum potential, p. 46–57.In T. S. Sadaswan (ed.) Maheshwari commemoration volume. J. Indian Bot Soc 42A. Bangalore Press, Bangalore, India.

    Google Scholar 

  8. Kroll, R. E. 1970. The use of spore dose response in determining varietal resistance to late blight of potatoes. Am Potato J 47:354 (Abstr.).

    Google Scholar 

  9. Kroll, R. E. 1978. An exponential sprayer for the application of inoculum in the field. Plant Dis Rep 62:87–91.

    Google Scholar 

  10. Lapwood, D. H. 1968. Observations on the infection of potato leaves byPhytophthora infestans. Brit Mycol Soc Trans 51:233–240.

    Google Scholar 

  11. Lapwood, D. H. and R. K. McKee. 1966. Dose-response relationships for infection of potato leaves by zoospores ofPhytophthora infestans. Brit Mycol Soc Trans 49:679–686.

    Article  Google Scholar 

  12. McKee, R. K. 1964. Observations on infection byPhytophthora infestans. Brit Mycol Soc Trans 47:365–374.

    Google Scholar 

  13. Redman, C. E., E. P. King and I. F. Brown, Jr. n.d. (ca. 1967) Tables for converting Barratt and Horsfall rating scores to estimated mean percentages. Eli Lilly and Co., Research Laboratories.

  14. Shearer, B. L. 1978. Inoculum density-host response relationships of spring wheat cultivars to infection bySeptoria tritici. Neth J Pl Pathol 84:1–12.

    Article  Google Scholar 

  15. Umaerus, V. 1969. Studies on Field resistance toPhytophthora infestans. 1. The infection efficiency of zoospores ofP. infestans as influenced by host genotype. Z. Pflanzenzuecht, 61:29–45.

    Google Scholar 

  16. Umaerus, V. 1969. Studies on field resistance toPhytophthora infestans. 2. A method of screening young potato seedlings for field resistance toP. infestans. Z. Pflanzenzuecht. 61:67–194.

    Google Scholar 

  17. Van der Plank, J. E. 1963. Plant diseases: epidemics and control. Academic Press, New York and London. 349 p.

    Google Scholar 

  18. Van der Plank, J. E. 1972. Basic principles of ecosystems.In R. F. Metcalf, et al., Pest control strategies for the future. p 109–133. National Academy of Sciences, Washington, D.C.

    Google Scholar 

  19. Van der Plank, J. E. 1975. Principles of plant infection. Academic Press, New York and London. 216 p.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Department of Plant Pathology, University of Minnesota, 1519 Gortner Avenue, 55108, St. Paul, MN

    R. E. Kroll & C. J. Eide (Professor Emeritus)

Authors
  1. R. E. Kroll
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. C. J. Eide
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Former Research Assistant

Paper No. 11,274, Scientific Journal Series, Minnesota Agricultural Experiment Station, St. Paul, MN 55108

Rights and permissions

Reprints and permissions

About this article

Cite this article

Kroll, R.E., Eide, C.J. Effect of inoculum concentration ofPhytophthora infestans on potato late blight. American Potato Journal 58, 153–161 (1981). https://doi.org/10.1007/BF02854414

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02854414

Key words

Search

Navigation