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Response of Seedling Alfalfa (Medicago sativa) to Four Postemergence Herbicides

Published online by Cambridge University Press:  12 June 2017

Dennis Tonks ,
Larry S. Jeffery  and
Bruce L. Webb
Dennis Tonks
Affiliation:
Dep. Plant Path. Weed Sci., Colo. State Univ., Ft. Collins, CO 80523
Larry S. Jeffery
Affiliation:
Dep. Agron. and Hortic., Brigham Young Univ., Provo, UT 84602
Bruce L. Webb
Affiliation:
Dep. Agron. and Hortic., Brigham Young Univ., Provo, UT 84602
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Abstract

Response of seedling alfalfa to four herbicides applied at the 2nd, 4th, and 8th trifoliate leaf stages was evaluated in 1988 and 1989. There was no interaction between the herbicides and alfalfa growth stages at the time of herbicide application in either year. Bentazon did not reduce alfalfa height or yield of the first cutting in either year. The dimethylamine salt of 2,4-DB and bromoxynil reduced first-cutting alfalfa yield in 1988 and 1989, respectively, and the butoxyethanol ester of 2,4-DB reduced first-cutting alfalfa yield both years. Each herbicide affected one or more measurements of alfalfa quality in at least one year.

Keywords

Bentazon, 3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxidebromoxynil, 3,5-dibromo-4-hydroxybenzonitrile2,4-DB, 4-(2,4-dichlorophenoxy)butanoic acidalfalfa, Medicago sativa L.Bentazonbromoxynil2,4-DB
Type
Research
Information
Weed Technology , Volume 5 , Issue 4 , December 1991 , pp. 736 - 738
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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