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Identification of Sulfometuron-Resistant Italian Ryegrass (Lolium multiflorum) Selections

Published online by Cambridge University Press:  12 June 2017

James M. Taylor  and
G. Euel Coats
James M. Taylor
Affiliation:
Dep. Plant and Soil Sci., Mississippi State Univ., Mississippi State, MS 39762
G. Euel Coats
Affiliation:
Dep. Plant and Soil Sci., Mississippi State Univ., Mississippi State, MS 39762
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Abstract

Two sulfometuron-resistant biotypes of Italian ryegrass were identified from rights-of-way of U.S. Highway 49E in Holmes County, MS, and State Highway 14 in Humphreys County, MS. Sulfometuron at 5.2 g ai/ha applied PRE or POST reduced shoot fresh weight of these selections 20% or less at 4 wk after treatment. A susceptible ‘Gulf’ Italian ryegrass was reduced 52% or more in shoot fresh weight by 0.5 g/ha sulfometuron applied PRE or POST The biotype from Highway 49E was reduced 47% or less in shoot fresh weight by 520 g/ha sulfometuron applied PRE or POST.

Keywords

Sulfometuron, 2-[[[[(4,6-dimethyl-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl] benzoic acidItalian ryegrass, Lolium multiflorum Lam. ‘Gulf’ # LOLMUHerbicide-resistant biotypes
Type
Research
Information
Weed Technology , Volume 10 , Issue 4 , December 1996 , pp. 943 - 946
Copyright
Copyright © 1996 by the Weed Science Society of America 

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References

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