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Utilization of Wheat Seed Rate to Manage Redstem Filaree (Erodium cicutarium) in a Zero-Tillage Cropping System

Published online by Cambridge University Press:  20 January 2017

Robert E. Blackshaw ,
Greg P. Semach  and
John T. O'Donovan
Robert E. Blackshaw*
Affiliation:
Research Centre, Agriculture and Agri-Food Canada, P.O. Box 3000, Lethbridge, AB, Canada T1J 4B1
Greg P. Semach
Affiliation:
Research Centre, Agriculture and Agri-Food Canada, P.O. Box 3000, Lethbridge, AB, Canada T1J 4B1
John T. O'Donovan
Affiliation:
Research Centre, Agriculture and Agri-Food Canada, Box 29, Beaverlodge, AB, Canada T0H 0C0
*
Corresponding author's E-mail: blackshaw@em.agr.ca.
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Abstract

A field study was conducted to determine the effect of increasing seed rates of spring wheat (Triticum aestivum) on redstem filaree (Erodium cicutarium) biomass and seed production and on wheat yield in a zero-tillage cropping system. Wheat was sown at 50, 100, 150, 200, and 300 kg/ha in an experiment four consecutive years to determine annual and accumulated effects over time. Redstem filaree was most competitive with wheat when it emerged before or with wheat and when rainfall was plentiful during May and June. Redstem filaree biomass and seed production were markedly inhibited by drought conditions. An increase in wheat seed rate from 50 to 300 kg/ha reduced redstem filaree biomass and seed production by 53 to 95% over the years. There was little yield benefit to increasing the seed rate of weed-free wheat above 50 kg/ha. However, in the presence of redstem filaree, an increase in wheat seed rate from 50 to 300 kg/ha resulted in wheat yield being increased by 56 to 498%. Over four consecutive years, an increase in wheat seed rate from 50 to 300 kg/ha reduced redstem filaree in the soil seedbank by 79%. Higher seed rates of wheat can be an effective component of an improved program for redstem filaree management in conservation tillage cropping systems.

Keywords

Redstem filaree, Erodium cicutarium (L.) L'Her. ex Ait. # EROCIspring wheat, Triticum aestivum L. ‘Neepawa’Competitionsoil seedbankweed seed yieldwheat plant densitywheat yieldEROCIPARphotosynthetically active radiation
Type
Research Article
Information
Weed Technology , Volume 14 , Issue 2 , June 2000 , pp. 389 - 396
Copyright
Copyright © Weed Science Society of America 

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