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Weed Control in Seed Fields of Side-Oats Grama

Published online by Cambridge University Press:  12 June 2017

M. K. McCarty ,
L. C. Newell ,
C. J. Scifres  and
J. E. Congrove
M. K. McCarty
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Lincoln, Nebraska
L. C. Newell
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Lincoln, Nebraska
C. J. Scifres
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Lincoln, Nebraska
J. E. Congrove
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Lincoln, Nebraska Franklin County, Nebraska
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Abstract

Preemergence applications of 5-bromo-3-sec-butyl-6-methyl-uracil (bromacil) and mixtures containing bromacil controlled both broadleaf and grass weeds best, and increased seed production and quality in side-oats grama [Bouteloua curtipendula (Michx.) Torr.] fields. Other herbicides significantly reduced broadleaf weeds but did not control grass weeds. The most troublesome grasses were foxtails; bristly foxtail [Setaria verticillata (L.) Beauv.] was the most prominent. Weed competition, in plots where herbicides were ineffective, significantly lowered seed production. Excessive rainfall after treatment was probably responsible for decreased weed control and increased crop damage from some of the herbicides. Applications of 2,3,5-trichloro-4-pyridinol (pyriclor) resulted in early crop chlorosis.

Type
Research Article
Information
Weeds , Volume 15 , Issue 2 , April 1967 , pp. 171 - 174
Copyright
Copyright © 1967 Weed Science Society of America 

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References

Literature Cited

1. Newell, L. C., Staten, R. D., Jackson, E. B., and Conrad, E. C. 1962. Side-oats grama in the Central Great Plains. Nebraska Agr. Exp. Sta. Res. Bull. 207. 38 p.Google Scholar
2. Newell, L. C. and Smika, D. E. 1965. Seed quality depends on management. Nebraska Quart. 12(3):14–15.Google Scholar
3. Smika, D. E. and Newell, L. C. 1965. Irrigation and fertilization practices for seed production from established stands of side-oats grama. Nebraska Agr. Exp. Sta. Res. Bull. 218. 13 p.Google Scholar