Summary
Twenty cowpea germplas lines were assessed under glasshouse conditions for resistance to a field population of powdery mildew fungus Erysiphe polygoni. Genotypes APC 68, 585, 809 and 780 exhibited partial resistance while line APC 703 exhibited absolute resistance. The AUDPC values based on severity ratings were significantly lower in partial resistant lines and there was a good relation of AUDPC values with incidence (r=0.88**), and medium correlation with colony size (r=0.57**). Peak severity showed medium correlation to colony size (r=0.59**) and conidia per colony (r=0.55**) and high correlation to disease incidence (r=0.91**).
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Arntzen, F.K. & J.E., Parlevliet, 1986. Development of barley leaf rust, Puccinia hordei, infections in barley II. Importance of early events at the site of penetration for partial resistance. Euphytica 35: 961–968.
Heagle, A.S. & M.B., Moore, 1970. Some effects of moderate adult resistance to crown rust of oats. Phytopathology 60: 461–466.
James, W.C., 1971. An illustrated series of assessment keys for plant diseases, their preparation and usage. Can. Plant Dis. Surv. 51: 39–65.
James, W.C., 1974. Assessment of plant disease and losses. Annu. rev. Phytopathol. 12: 27–48.
Neervoort, W.J. & J.E., Parlevliet, 1978. Partial resistance of barley to leaf rust Puccinia hordei V. Analysis of the components of partial resistance in eight barley cultivars. Euphytica 26: 33–39.
Nørgaard Knudsen, J.Chr., H.H., Dalsgaard & J., Helms Jørgensen, 1986. Field assessment of partial resistance to powdery mildew in spring barley. Euphytica 35: 233–243.
Parlevliet, J.E. & C., Kievit, 1986. Development of barley leaf rust, Puccinia hordei infections in barley I. Effect of partial resistance and plant stage. Euphytica 35: 953–959.
Pataky, J.K., 1986. Partial resistance in sweet corn hybrid seedlings. Phytopathology 76: 702–707.
Quenouille, M.H., 1950. Introductory statistics. Oxford. 248 p.
Southern, J.W. & R.D., Wilcoxson, 1983. Effect of planting date on slow rusting of wheat by Puccinia graminis f. sp. tritici. Int. J. Trop. Pl. Dis. 1: 21–24.
Subrahmanyam, P., D., McDonald, R.W., Gibbons, S.N., Nigam & D.J., Nevill, 1982. Resistance to rust and late leaf spot disease in some genotype of Arachis hypogea. Peanut Sci 9: 6–10.
Wilcoxson, R.D., 1986. How to select for the slow rusting types of resistance in cereals. Pl. Dis. Res. 1: 1–10.
Wilcoxson, R.D., B., Skovmand & A.A., Atif, 1975. Evaluation of wheat cultivars for the ability to retard development of stem rust. Ann. Appl. Biol. 80: 275–287.
Wilson, J. & G., Shaner, 1987. Slow leaf rusting resistance in triticale. Phytopathology 77: 458–462.
Yeh, W.H. & J.M., Bonman, 1980. Assessment of partial resistance to Pyricularia oryzae in six rice cultivars. Plant Pathol. 29: 319–323.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Raju, S.G., Anilkumar, T.B. Evaluation of cowpea genotypes for partial resistance to powdery mildew. Euphytica 50, 191–195 (1990). https://doi.org/10.1007/BF00023644
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00023644