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Persian Darnel (Lolium persicum) Fecundity Response to Spring Wheat, Canola, and Sunflower Interference

Published online by Cambridge University Press:  20 January 2017

Johnathon D. Holman ,
Alvin J. Bussan ,
Bruce D. Maxwell ,
Perry R. Miller  and
James A. Mickelson
Johnathon D. Holman*
Affiliation:
Department of Plant, Soil, and Entomological Sciences, College of Agriculture and Life Sciences, University of Idaho, Moscow, ID 83844-2339
Alvin J. Bussan
Affiliation:
Horticulture Department, University of Wisconsin, Madison, WI 53706-1590
Bruce D. Maxwell
Affiliation:
Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT 59717
Perry R. Miller
Affiliation:
Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT 59717
James A. Mickelson
Affiliation:
Pioneer Hi-Bred International, Inc., Johnston, IA 50131
*
Corresponding author's E-mail: [email protected]
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Abstract

Persian darnel control options are limited and unmanaged populations can cause substantial crop yield loss. Integrating crop diversification and higher crop seeding rates into a cropping system might improve Persian darnel management. Field experiments were conducted to determine the effect of different crops and increased crop seeding rates on Persian darnel fecundity. Persian darnel produced up to 2,800 seeds per plant and 53,000 seeds/m2 when grown without competition. Increasing crop density reduced Persian darnel tillers per plant, seed weight, and fecundity. Increasing crop density reduced Persian darnel fecundity 0.4 to 0.2% per spring wheat plant, 0.6 to 0.1% per canola plant, and 16 to 8% per sunflower plant. Persian darnel fecundity was impacted the greatest by reduced weed seedling establishment, which was caused by crop competition and seeding sunflower late in the spring preceded by a nonselective herbicide application. Results indicated delaying the seeding of spring crops or including a late-seeded warm season crop, like sunflower or safflower, in the cropping system is an effective weed management tool for reducing Persian darnel fecundity.

Keywords

GlyphosatePersian darnel, Lolium persicum Boiss. & Hoh. # LOLPScanola, Brassica napus Kochspring wheat, Triticum aestivum L.sunflower, Helianthus annuus L.Fecunditypreplant herbicideseedling establishmentseeding dateseeding ratestale seedbedweed interferenceyield components
Type
Research Article
Information
Weed Technology , Volume 20 , Issue 2 , June 2006 , pp. 430 - 437
Copyright
Copyright © Weed Science Society of America 

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