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Weed-Competitive Ability of Spring and Winter Cereals in the Northern Great Plains

  • Brian L. Beres (a1), K. Neil Harker (a2), George W. Clayton (a1), Eric Bremer (a3), Robert E. Blackshaw (a1) and Robert J. Graf (a1)...

The inclusion of winter cereals in spring-annual rotations in the northern Great Plains may reduce weed populations and herbicide requirements. A broad range of spring and winter cereals were compared for ability to suppress weeds and maximize grain yield at Lacombe (2002 to 2005) and Lethbridge (2003 to 2005), Alberta, Canada. High seeding rates (≥ 400 seeds/m2) were used in all years to maximize crop competitive ability. Spring cereals achieved high crop-plant densities (> 250 plants/m2) at most sites, but winter cereals had lower plant densities due to winterkill, particularly at Lethbridge in 2004. All winter cereals and spring barley were highly effective at reducing weed biomass at Lacombe for the first 3 yr of the study. Weed suppression was less consistently affected by winter cereals in the last year at Lacombe and at Lethbridge, primarily due to poor winter survival. Grain yields were highest for spring triticale and least for spring wheat at Lacombe, with winter cereals intermediate. At Lethbridge, winter cereals had higher grain yields in 2003 whereas spring cereals had higher yields in 2004 and 2005. Winter cereals were generally more effective at suppressing weed growth than spring cereals if a good crop stand was established, but overlap in weed-competitive ability among cultivars was considerable. This information will be used to enhance the sustainable production of winter and spring cereals in traditional and nontraditional agro-ecological zones.

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B. L. Beres , G. W. Clayton , K. N. Harker , F. C. Stevenson , R. E. Blackshaw , and R. J. Graf 2010. A sustainable management package to improve winter wheat production and competition with weeds. Agron. J. 102:649657.

N-O. Bertholdsson 2005. Early vigour and allelopath—two useful traits for enhanced barley and wheat competitiveness against weeds. Weed Res 45:94102.

R. E. Blackshaw 1994. Differential competitive ability of winter wheat cultivars against downy brome. Agron. J. 86:649654.

R. E. Blackshaw , J. T. O'Donovan , K. N. Harker , G. W. Clayton , and R. N. Stougaard 2006. Reduced herbicide doses in field crops: a review. Weed Biol. Manag 6:1017.

R. E. Blackshaw , G. P. Semach , and J. T. O'Donovan 2000. Utilization of wheat seed rate to manage redstem filaree (Erodium cicutarium) in a zero-tillage cropping system. Weed Technol 14:389396.

D. A. Derksen , R. L. Anderson , R. E. Blackshaw , and B. Maxwell 2002. Weed dynamics and management strategies for cropping systems in the northern Great Plains. Agron. J. 94:174185.

B. L. Duggan and D. B. Fowler 2006. Yield structure and kernel potential of winter wheat on the Canadian Prairies. Crop Sci 46:14791487.

M. H. Entz and D. B. Fowler 1991. Agronomic performance of winter versus spring wheat. Agron. J. 83:527532.

K. N. Harker , J. T. O'Donovan , R. B. Irvine , T. K. Turkington , and G. W. Clayton 2009. Integrating cropping systems with cultural techniques augments wild oat (Avena fatua) management in barley. Weed Sci 57:326337.

D. L. Holen , P. L. Bruckner , J. M. Martin , G. R. Carlson , D. M. Wichman , and J. E. Berg 2001. Response of winter wheat to simulated stand reduction. Agron. J. 93:364370.

G. P. Lafond and D. B. Fowler 1989. Soil temperature and water content, seeding depth, and simulated rainfall effects on winter wheat emergence. Agron. J. 81:609614.

S. P. Lanning , L. E. Talbert , J. M. Martin , T. K. Blake , and P. L. Bruckner 1997. Genotype of wheat and barley affects light penetration and wild oat growth. Agron. J. 89:100103.

D. Lemerle , R. D. Cousens , G. S. Gill , S. J. Peltzer , M. Moerkerk , C. E. Murphy , D. Collins , and B. R. Cullis 2004. Reliability of higher seeding rates of wheat for increased competitiveness with weeds in low rainfall environments. J. Agric. Sci 142:395409.

D. Lemerle , G. S. Gill , C. E. Murphy , S. R. Walker , R. D. Cousens , S. Mokhtari , S. J. Peltzer , R. Coleman , and D. J. Luckett 2001. Genetic improvement and agronomy for enhanced wheat competitiveness with weeds. Aust. J. Agric. Res 52:527548.

D. Lemerle , B. Verbeek , and N. Coombes 1995. Losses in grain yield of winter crops from Lolium rigidum competition depend on crop species, cultivar and season. Weed Res 35:503509.

H. Mason , L. Goonewardene , and D. Spaner 2008. Competitive traits and the stability of wheat cultivars in differing natural weed environments on the northern Canadian Prairies. J. Agric. Sci 146:2133.

C. L. Mohler 2001. Enhancing the competitive ability of crops. Pages 269321. In M. Liebman , C. L. Mohler , and C. P. Staver Ecological Management of Agricultural Weeds. Cambridge, UK: Cambridge University Press.

J. T. O'Donovan , J. C. Newman , K. N. Harker , R. E. Blackshaw , and D. W. McAndrew 1999. Effect of barley plant density on wild oat interference, shoot biomass and seed yield under zero tillage. Can. J. Plant Sci 79:655662.

J. M. Thurston 1962. The effect of competition from cereal crops on the germination and growth of Avena fatua in a naturally-infested field. Weed Res 2:192207.

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Weed Technology
  • ISSN: 0890-037X
  • EISSN: 1550-2740
  • URL: /core/journals/weed-technology
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