Canadian Journal of Plant Science (2010) 90, 919-924

G.C. Wilson, N. Soltani, C.J. Swanton, F.J. Tardif, D.E. Robinson and P.H. Sikkema (2010)
Volunteer wheat (Triticum aestivum L.) competition in corn (Zea mays L.)
Canadian Journal of Plant Science 90 (6), 919-924
Abstract: Volunteer winter wheat (Triticum aestivum L.) is a sporadic weed found in corn (Zea mays L.) fields across southern Ontario. Eight trials were conducted over a 2-yr period (2006 and 2007) at four locations to determine the competitiveness of volunteer winter wheat in corn. A soft red winter wheat cultivar (Pioneer 25R47) was seeded at each location at densities of 0 to 30 seeds m^-2 late in the fall, prior to corn planting the following spring. Volunteer wheat competition in corn resulted in reduced emergence of corn leaf collars. Competition with volunteer wheat resulted in a 5% decrease in corn leaf collars present at 21 and 70 d after emergence with volunteer wheat densities of 3.0 and 5.2 plants m^-2, respectively. Furthermore, volunteer wheat competition reduced total leaf area, leaf dry weight, shoot dry weight, plant and ear height and yield by 5% with densities of 5.1 to 6.0 plants m^-2 compared with the weed-free control. The level of competitiveness was dependent on the density of volunteer wheat.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Clarence J. Swanton

Research topic(s) for pests/diseases/weeds:
damage/losses/economics

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Triticum aestivum (weed)	Maize/corn (Zea mays)	Canada (east)