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An Ecological Study of Lens- and Globe-Podded Hoary Cresses in Saskatchewan

Published online by Cambridge University Press:  12 June 2017

G. W. Selleck
G. W. Selleck*
Affiliation:
University of Saskatchewan
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Abstract

A 7-year ecological study of natural infestations of globe-podded (Cardaria pubescens) and lens-podded (C. chalapensis) hoary cresses was conducted under conditions of irrigation and dry land farming in southern Saskatchewan. Density and area measurements were compared annually in competition with grasses, forbs and shrubs in several environments. The hoary cresses are well adapted to moist situations but are not particularly vigorous in dry, semi-arid environments. Globe-podded hoary cress was better able to survive a period of drought than the lens-podded species. Native roses (Rosa spp.), western snowberry (Symphoricarpos occidentalis) and Russian knapweed (Centaurea repens) were the most effective competitors of the hoary cresses. Alfalfa and to a lesser degree, bromegrass were also effective. As these infestations of hoary cress are situated upstream from the Saskatchewan River Irrigation Project, they constitute a serious threat to many acres of irrigable farmland. Control by cultural means is shown to be feasible.

Type
Research Article
Information
Weeds , Volume 13 , Issue 1 , January 1965 , pp. 1 - 5
Copyright
Copyright © 1965 Weed Science Society of America 

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References

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