VIEW ARTICLE

Ecology and Epidemiology

Effect of Temperature and Host:Parasite Combination on the Latent Period of Puccinia recondita in Seedling Wheat Plants. M. G. Eversmeyer, Research plant pathologist, U. S. Department of Agriculture, Science and Education Administration, Agricultural Research, Manhattan, Kansas; C. L. Kramer(2), and L. E. Browder(3). (2)Professor, Division of Biology, Kansas State University, Manhattan 66506; (3)Research plant pathologist, U. S. Department of Agriculture, Science and Education Administration, Agricultural Research, Kansas State University, Manhattan 66506. Phytopathology 70:938-941. Accepted for publication 24 March 1980. This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1980. DOI: 10.1094/Phyto-70-938.

Increasing the ambient temperature from minimum (10 C) to optimum (26.5 C) decreased the latent period, while raising the temperature from optimum to maximum (32.2 C) increased the latent period. Temperature developmental curves for latent period were skewed to the left,+ with an optimum at 80% of the temperature range (10.0 – 32.2 C). Significant differences were measured in the effects of temperature, host:parasite combination, and their interactions on latent period. Presence of a gene or genes for resistance in the host line generally was associated with significant differences in the host line effects and host line interaction with temperature and parasite culture. Latent period means for the various culture:temperature combinations show that significant differences occur at temperatures near the minimum for fungal development, but no significant differences in latent period occur near optimum temperatures.