Phytopathology (1996) 86, p. S56 (Steadman et al.)

J.R. Steadman, D. O'Keefe, E.D. Kerr and H.F. Schwartz (1996)
Pathogen variability in bean rust and implications for resistance breeding strategies on the U.S. High Plains
Phytopathology 86 (11 suppl.), S56-S56
Abstract: Rust is an endemic disease of beans (Phaseolus vulgaris) with epidemic potential in Nebraska, Colorado and surrounding regions. Cultivars such as Pinto 'Olathe' that were resistant to rust when released are now susceptible to new pathotypes of the pathogen. The frequency of the sexual stage of Uromyces appendiculatus on volunteer beans in the region may be a factor in virulence shifts within the pathogen population. A mobile nursery, seedlings of virulence differentials exposed in the field, with new sources of resistance can be used to anticipate changes in U. appendiculatus pathotypes.
Database assignments for author(s): James R. Steadman

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Uromyces appendiculatus	Beans (Phaseolus)	U.S.A. (SW)
	Uromyces appendiculatus	Beans (Phaseolus)	U.S.A. (mid N)