Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-10T20:08:32.288Z Has data issue: false hasContentIssue false
  • English
  • Français

The Critical Weed-Free Period in Carrot

Published online by Cambridge University Press:  20 January 2017

Clarence J. Swanton ,
John O'Sullivan  and
Darren E. Robinson
Clarence J. Swanton*
Affiliation:
Department of Plant Agriculture, University of Guelph, Guelph, ON N1G 2W1, Canada
John O'Sullivan
Affiliation:
Department of Plant Agriculture, University of Guelph, Guelph, ON N1G 2W1, Canada
Darren E. Robinson
Affiliation:
Department of Plant Agriculture, University of Guelph, Guelph, ON N1G 2W1, Canada
*
Corresponding author's E-mail: cswanton@uoguelph.ca
Get access Rights & Permissions [Opens in a new window]

Abstract

Seeding date and the duration of weed emergence influenced the duration of the critical weed-free period in carrot. The critical weed-free period extended up to 930 growing degree days (GDD), when carrot was seeded in late April. In contrast, the critical weed-free period was short and lasted 414 to 444 GDD, when seeded in mid to late May and weed biomass was less than 650 g m−2. It is important for growers to scout fields for weeds until 930 GDD to protect the yield potential of the carrot crop in earlier planted crops; however, for carrot planted in mid to late May, weeds emerging after 444 GDD did not reduce yield. A useful strategy to reduce reliance on herbicide application would be to delay planting until late in May.

Keywords

Carrot, Daucus carota LCritical period of weed controlcrop competitionintegrated weed management
Type
Weed Biology and Ecology
Information
Weed Science , Volume 58 , Issue 3 , September 2010 , pp. 229 - 233
Copyright
Copyright © 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

Bellinder, R. R., Kirkwyland, J. J., and Wallace, R. W. 1997. Carrot (Daucus carota) and weed reponse to linuron and metribuzin applied at different crop stages. Weed Tech. 11:235–240.Google Scholar
Hall, M. R., Swanton, C. J., and Anderson, G. W. 1992. The critical period of weed control in grain corn (Zea mays L.). Weed Sci. 40:441–447.Google Scholar
Jensen, K. I. N., Doohan, D. J., and Specht, E. G. 2004. Response of processing carrot to metribuzin on mineral soils in Nova Scotia. Can. J. Plant Sci. 84:669–676.Google Scholar
Knezevic, S. Z., Evans, S. P., Blankenship, E. E., Van Acker, R. C., and Lindquist, J. L. 2002. Critical period for weed control: the concept and data analysis. Weed Sci. 50:773–786.Google Scholar
Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) 2006. Vegetable Production Recommendations 2006–2007. Publication 363. Toronto, Canada: Queen's Printer for Ontario. 232.Google Scholar
Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) 2008. Guide to Weed Control 2008–2009. Publication 75. Toronto, Canada: Queen's Printer for Ontario. 380.Google Scholar
Statistics Canada 2008. Fruit and vegetable production. http://www.statcan.gc.ca/pub/22-003-x/22-003-x2008001-eng.pdf. Accessed: April 20, 2009.Google Scholar
Swanton, C. J. and Weise, S. F. 1991. Integrated weed management: rationale and approach. Weed Technol. 5:657–663.Google Scholar
Van Acker, R. C., Swanton, C. J., and Weise, S. F. 1993. The critical period of weed control in soybean [Glycine max (L.) Merr]. Weed Sci. 41:194–200.Google Scholar
Van Heemst, H. D. J. 1985. The influence of weed competition on crop yield. Agric. Syst. 18:81–93.Google Scholar
Weaver, S. E. and Tan, C. S. 1983. Critical period of weed interference in transplanted tomatoes (Lypersicum esculentum): growth analysis. Weed Sci. 31:476–481.Google Scholar
Williams, M. M. II 2006. Planting date influences critical period of weed control in sweet corn. Weed Sci. 54:928–933.Google Scholar
Williams, M. M. II and Boydston, R. A. 2006. Volunteer potato interference in carrot. Weed Sci. 54:94–99.Google Scholar
Woolley, B. L., Michaels, T. E., Hall, M. R., and Swanton, C. J. 1993. The critical period of weed control in white bean (Phaseolus vulgaris). Weed Sci. 41:180–184.Google Scholar