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Jointed Goatgrass (Aegilops cylindrica) and Downy Brome (Bromus tectorum) Control in Perennial Grasses

Published online by Cambridge University Press:  12 June 2017

K. George Beck ,
James R. Sebastian  and
Phillip L. Chapman
K. George Beck
Affiliation:
Dep. Plant Pathol. Colorado State Univ., Fort Collins, CO 80523
James R. Sebastian
Affiliation:
Dep. Plant Pathol. Colorado State Univ., Fort Collins, CO 80523
Phillip L. Chapman
Affiliation:
Dep. Statistics, Colorado State Univ., Fort Collins, CO 80523
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Abstract

Glyphosate and package mixtures of glyphosate plus dicamba or 2,4-D were evaluated for the selective control of jointed goatgrass and downy brome in seeded perennial grasses. Glyphosate at 560, glyphosate plus dicamba at 550 + 220, and glyphosate plus 2,4-D at 420 + 350 and 570 + 470 g ai/ha controlled 90% or more jointed goatgrass in 1988 and 1991. Glyphosate plus 2,4-D at 150 + 120 and 280 + 240 g/ha were the only treatments that controlled less than 90% of jointed goatgrass in 1991. In 1988, glyphosate at 210 g/ha and glyphosate plus dicamba at 210 + 80 g/ha were the only treatments that controlled less than 90% of downy brome. Glyphosate at 210, 280, 420, and 560 g/ha, glyphosate plus dicamba at 210 + 80, 280 + 110, 420 + 170, and 550 + 220 g/ha, and glyphosate plus 2,4-D at 150 + 120, 280 + 240, 420 + 350, and 570 + 470 g/ha controlled 90% or more downy brome in 1990. Pubescent wheatgrass and crested wheatgrass were stunted or killed if they were growing when herbicides were applied.

Keywords

Dicamba, 3,6-dichloro-2-methoxybenzoic acidglyphosate, N-(phosphonomethyl)glycine2,4-D, (2,4-dichlorophenoxy)acetic aciddowny brome, Bromus tectorum L. # BROTEjointed goatgrass, Aegilops cylindrica Host # AEGCYcrested wheatgrass, [Agropyron desertorum (Fisch. ex Link)Schult.]pubescent wheatgrass, [Agropyron trichophorum (Link)Richt., ‘Luna’]Grass phytotoxicitydicambaglyphosate2,4-DAEGCYBROTE
Type
Research
Information
Weed Technology , Volume 9 , Issue 2 , June 1995 , pp. 255 - 259
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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