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Effects of Herbicides on Grass Seed Production and Downy Brome (Bromus tectorum)

Published online by Cambridge University Press:  12 June 2017

Tom D. Whitson ,
Mark E. Majerus ,
Reginald D. Hall  and
Jay D. Jenkins
Tom D. Whitson
Affiliation:
Plant, Soil and Insect Sciences, University of Wyoming, Laramie, WY 82071
Mark E. Majerus
Affiliation:
Plant, Soil and Insect Sciences, University of Wyoming, Laramie, WY 82071
Reginald D. Hall
Affiliation:
USDA-NRCS Plant Materials Center, Bridger, MT 59014
Jay D. Jenkins
Affiliation:
University of Wyoming, Laramie, WY 82071
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Abstract

Control of downy brome in cool-season perennial grasses grown for seed production must be done prior to seed harvest, because downy brome seeds cannot be separated from cool-season grass seeds. Field experiments were conducted near Powell, WY, and Bridger, MT, to evaluate several herbicides for control of downy brome from 1992 through 1994 in western wheatgrass, slender wheatgrass, beardless wild rye, thickspike wheatgrass, and meadow bromegrass. When fall-applied, only metribuzin at 0.4 kg/ha and oxyfluorfen plus metribuzin at 1.1 plus 0.3 kg/ha controlled 98 and 95% of the downy brome, respectively, without affecting grass seed viability or seed yield. Early spring applications of paraquat at 0.8 kg/ha controlled 100% of the downy brome, but suppressed perennial grasses. Glyphosate applied in early spring at 0.3 kg/ha controlled 48% of the downy brome, but suppressed perennial grasses. Seed yield reductions occurred when thickspike wheatgrass and meadow brome were treated with glyphosate at 0.3 kg/ha.

Keywords

Glyphosate, N-(phosphonomethyl)glycinemetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-oneoxyfluorfen, 2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzeneparaquat, 1,1'-dimethyl-4,4'-bipyridinium iondowny brome, Bromus tectorum L. # BROTE‘Shoshone’ beardless wild rye, Leymus triticoides (Buckl.) Priger‘Regar’ meadow bromegrass, Bromus biebersteinii R. and S.‘Pryor’ slender wheatgrass, Elymus trachycaulus (Link) Gould ex Shinners‘Critana’ thickspike wheatgrass, Elymus lanceolatus (Scribn. and Smith) Gould‘Rosana’ western wheatgrass, Pascopyrum smithii (Rydb.) LoveCool-season grass seed productiongrass tolerance to herbicides
Type
Research
Information
Weed Technology , Volume 11 , Issue 4 , December 1997 , pp. 644 - 648
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

Literature Cited

Bennett, J. L. 1988. Plants of Rhode Island. Proceedings of the Providence Frankin Society. 128 p.Google Scholar
Bingham, S. W., Segura, J., and Foy, C. L. 1980. Susceptibility of several grasses to glyphosate. Weed Sci. 28:570–584.CrossRefGoogle Scholar
Canode, C. L., Robocker, W. C., and Muzik, T. J. 1962. Grass seed production as influenced by chemical control of downy brome. Weeds 10:216–219.CrossRefGoogle Scholar
Comes, R. D., Marquis, L. Y., and Kelly, A. 1981. Response of seedlings of three perennial grasses to dalapon, amitrole, and glyphosate. Weed Sci. 29:619–621.CrossRefGoogle Scholar
Engel, R. E. and Aldrich, R. J. 1960. Reduction of annual bluegrass, Poa annua, in bentgrass turf by use of chemicals. Weeds 8:26–28.CrossRefGoogle Scholar
Hulbert, L. C. 1955. Ecological studies of Bromus tectorum and other annual bromegrasses. Ecol. Monogr. 25:181–213.CrossRefGoogle Scholar
Lee, W. O. 1965a. Selective control of downy brome and rattail fescue in irrigated perennial grass seed fields in central Oregon. Weeds 13:205–209.CrossRefGoogle Scholar
Lee, W. O. 1965b. Herbicides in seedbed preparation for the establishment of grass seed fields. Weeds 13:293–297.CrossRefGoogle Scholar
Lee, W. O. 1977. Winter annual grass weed control in Italian ryegrass with ethofumesate. Weed Sci. 25:252–255.CrossRefGoogle Scholar
McCarty, M. K. 1979. Yield and quality of two cool-season grasses affected by selected herbicides. Weed Sci. 27:415–421.CrossRefGoogle Scholar
Steinbauer, G. P. and Grigsby, B. H. 1957. Field and laboratory studies on the dominancy and germination of seeds of chess (Bromus secalinus L.) and downy bromegrass (Bromus tectorum L.). Weeds 5:1–4.CrossRefGoogle Scholar
Wicks, G. A., Burnside, O. C., and Fenster, C. R. 1965. Chemical control of downy brome in grasslands of western Nebraska. Weeds 13:202–204.CrossRefGoogle Scholar
Wicks, G. A., Fenster, C. R., and Burnside, O. C. 1971, Influence of soil type and depth of planting on downy brome seed. Weed Sci. 19:82–86.CrossRefGoogle Scholar
Young, J. A. and Evans, R. A. 1978. Etiolated growth of range grasses for an indication of tolerance to atrazine. Weed Sci. 26:480–483.CrossRefGoogle Scholar