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

  • Tom D. Whitson (a1), Mark E. Majerus (a1), Reginald D. Hall (a2) and Jay D. Jenkins (a3)


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.



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Bennett, J. L. 1988. Plants of Rhode Island. Proceedings of the Providence Frankin Society. 128 p.
Bingham, S. W., Segura, J., and Foy, C. L. 1980. Susceptibility of several grasses to glyphosate. Weed Sci. 28:570584.
Canode, C. L., Robocker, W. C., and Muzik, T. J. 1962. Grass seed production as influenced by chemical control of downy brome. Weeds 10:216219.
Comes, R. D., Marquis, L. Y., and Kelly, A. 1981. Response of seedlings of three perennial grasses to dalapon, amitrole, and glyphosate. Weed Sci. 29:619621.
Engel, R. E. and Aldrich, R. J. 1960. Reduction of annual bluegrass, Poa annua, in bentgrass turf by use of chemicals. Weeds 8:2628.
Hulbert, L. C. 1955. Ecological studies of Bromus tectorum and other annual bromegrasses. Ecol. Monogr. 25:181213.
Lee, W. O. 1965a. Selective control of downy brome and rattail fescue in irrigated perennial grass seed fields in central Oregon. Weeds 13:205209.
Lee, W. O. 1965b. Herbicides in seedbed preparation for the establishment of grass seed fields. Weeds 13:293297.
Lee, W. O. 1977. Winter annual grass weed control in Italian ryegrass with ethofumesate. Weed Sci. 25:252255.
McCarty, M. K. 1979. Yield and quality of two cool-season grasses affected by selected herbicides. Weed Sci. 27:415421.
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 5:14.
Wicks, G. A., Burnside, O. C., and Fenster, C. R. 1965. Chemical control of downy brome in grasslands of western Nebraska. Weeds 13:202204.
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. 19:8286.
Young, J. A. and Evans, R. A. 1978. Etiolated growth of range grasses for an indication of tolerance to atrazine. Weed Sci. 26:480483.


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

  • Tom D. Whitson (a1), Mark E. Majerus (a1), Reginald D. Hall (a2) and Jay D. Jenkins (a3)


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