Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-24T04:28:43.367Z Has data issue: false hasContentIssue false
  • English
  • Français

Undergraduate Essay: St. Johnswort, A Potential Problem in Pasture Land in Nova Scotia

Published online by Cambridge University Press:  12 June 2017

Darren K. Robinson
Darren K. Robinson*
Affiliation:
Nova Scotia Agricultural College, Truro
Get access Rights & Permissions [Opens in a new window]

Extract

Recently, a problem has developed in Hants County, Nova Scotia, Canada. The weed species common St. Johnswort (Hypericum perforatum L.), has become established in areas of West Hants County. It had previously been found along roadsides and ditched embankments, but it has now made its way into established pastures. On June 13, 1987, a local beef producer reported a case of photosensitization from grazing common St. Johnswort in one of her nurse cows. No prior cases had been reported in the province, although a neighboring farmer had lost cattle in the previous two years. This sparked the concern of farmers and agriculture representatives in the area as to the potential problem from this weed.

Type
WSSA Communications
Information
Weed Technology , Volume 4 , Issue 3 , September 1990 , pp. 690 - 692
Copyright
Copyright © 1990 Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

Campbell, M. H. 1985. Germination, emergence and seedling growth of Hypericum perforatum L. Weed Res. 25:259–266.CrossRefGoogle Scholar
Campbell, M. H. and Delfosse, E. S. 1984. The biology of Australian weeds, Hypericum perforatum L. J. Austral. Inst. Agric. Sci. 50:63–73.Google Scholar
Crompton, C. W., Hall, I. V., Jansen, K.I.N., and Hildebrand, P. D. 1988. The biology of Canadian weeds. Can. J. Plant Sci. 68:149–162.Google Scholar
Sampson, M. G. 1987. Biological control of perennial weeds in Nova Scotia. Agri-Food Industry Development Agreement Proj. Rep. 19.Google Scholar