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Effects of Herbicides on Italian Ryegrass (Lolium multiflorum), Forage Production, and Economic Returns from Dual-Purpose Winter Wheat (Triticum aestivum)

Published online by Cambridge University Press:  20 January 2017

Matthew A. Barnes
Affiliation:
Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK 74078
Thomas F. Peeper*
Affiliation:
Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK 74078
Francis M. Epplin
Affiliation:
Department of Agricultural Economics, Oklahoma State University, Stillwater, OK 74078
Eugene G. Krenzer Jr.
Affiliation:
Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK 74078
*
Corresponding author's E-mail: tfp@agr.okstate.edu.

Abstract

Two field experiments were conducted to evaluate the effects of selected herbicides on Italian ryegrass, combined Italian ryegrass plus wheat forage production, and returns from hard red winter wheat grain. Herbicides included BAY FOE 5043 + metribuzin (4:1 w/w premix), BAY MKH 6562, chlorsulfuron, chlorsulfuron + metsulfuron (5:1 w/w premix), diclofop, MON 37560, pendimethalin, ICIA 0604, and triasulfuron. Italian ryegrass was controlled 80% or more by 28 of 34 treatments. Grain dockage was reduced by 33 of 34 treatments at both sites, and grain yield was improved at both sites by 29 of 34 treatments. No herbicide treatment decreased forage protein content, but forage yield was frequently decreased by controlling Italian ryegrass. Gross returns from wheat grain were improved over the untreated check by all but six treatments at site 1, and by all but one treatment at site 2. The data did not support the hypothesis that returns from forage plus grain could be maximized by delaying Italian ryegrass control until grazing termination.

Type
Research
Copyright
Copyright © Weed Science Society of America 

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Effects of Herbicides on Italian Ryegrass (Lolium multiflorum), Forage Production, and Economic Returns from Dual-Purpose Winter Wheat (Triticum aestivum)
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