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Effect of volunteer barley (Hordeum vulgare L.) interference on field pea (Pisum sativum L.) yield and profitability

Published online by Cambridge University Press:  12 June 2017

John T. O'Donovan  and
Robert E. Blackshaw
Robert E. Blackshaw
Affiliation:
Agriculture and Agri-Food Canada Research Station, Lethbridge, AB, Canada T1J 4B1
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Abstract

Relationships between volunteer barley plant density and both pea and volunteer barley yield were determined in field experiments conducted over 2 yr at Vegreville and Lethbridge, Alberta. Nonlinear regression analysis indicated that severe pea yield losses due to volunteer barley occurred at both locations. Averaged over both years, pea seed yield losses per volunteer barley plant (initial slopes) varied from 1.7% at Vegreville to 5.4% at Lethbridge. Based on certain assumptions, economic thresholds calculated from the equations were approximately 2 and 6 volunteer barley plants m−2 at Lethbridge and Vegreville, respectively. Revenue from the volunteer barley seed partially alleviated the monetary losses caused by the reduced pea seed yield. The effects of pea density on pea and volunteer barley yield were inconsistent and marginal. This suggested that there was little advantage, in terms of increasing pea yield or reducing volunteer barley interference, to seeding pea above the recommended rate of 100 plants m−2.

Keywords

Volunteer barley, Hordeum vulgare L. ‘Galt’ HORVXPea, Pisum sativum L. ‘Radley’Volunteer barleypea seeding ratenonlinear regressioneconomic thresholdHORVX
Type
Weed Biology and Ecology
Information
Weed Science , Volume 45 , Issue 2 , April 1997 , pp. 249 - 255
Copyright
Copyright © 1997 by the Weed Science Society of America 

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