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Evaluating the Competitive Ability of Semileafless Field PeaCultivars

Published online by Cambridge University Press:  20 January 2017

Cory E. Jacob ,
Eric N. Johnson ,
Miles F. Dyck  and
Christian J. Willenborg
Cory E. Jacob
Affiliation:
Department of Plant Science, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK, Canada S7N 5A8
Eric N. Johnson
Affiliation:
Department of Plant Science, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK, Canada S7N 5A8
Miles F. Dyck
Affiliation:
Department of Renewable Resources, University of Alberta, 773 General Services Building, Edmonton, AB, Canada T6G 2H1
Christian J. Willenborg*
Affiliation:
Department of Plant Science, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK, Canada S7N 5A8
*
Corresponding author's E-mail: chris.willenborg@usask.ca
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Abstract

The inclusion of competitive crop cultivars in crop rotations is animportant integrated weed management (IWM) tool. However, competitiveness isoften not considered a priority for breeding or cultivar selection bygrowers. Field pea (Pisum sativum L.) is often considered apoor competitor with weeds, but it is not known whether competitivenessvaries among semileafless cultivars. The objectives of this study were todetermine if semileafless field pea cultivars vary in their ability tocompete and/or withstand competition, as well as to identify abovegroundtrait(s) that may be associated with increased competitive ability. Fieldexperiments were conducted in 2012 and 2013 at three locations in westernCanada. Fourteen semileafless field pea cultivars were included in the studyrepresenting four different market classes. Cultivars were grown either inthe presence or absence of model weeds (wheat and canola), and competitiveability of the cultivars was determined based on their ability to withstandcompetition (AWC) and their ability to compete (AC). Crop yield, weedbiomass and weed fecundity varied among sites but not years. Cultivarsexhibited inconsistent differences in competitive ability, although cv.Reward consistently exhibited the lowest AC and AWC. None of the traitsmeasured in this study correlated highly with competitive ability. However,the highest-yielding cultivars generally were those that had the highest AC,whereas cultivars that ranked highest for AWC were associated with lowerweed fecundity. Ranking the competitive ability of field pea cultivars couldbe an important IWM tool for growers and agronomists.

Keywords

Field pea, Pisum sativum LCompetitioncompetitive abilitycultivarssemileafless peaweedsyield loss

Information

Type
Weed Biology and Ecology
Information
Weed Science , Volume 64 , Issue 1 , March 2016 , pp. 137 - 145
Copyright
Copyright © Weed Science Society of America 

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Footnotes

Associate Editor for this paper: John L. Lindquist, University of Nebraska.

References

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