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Herbicides and Mixtures for Annual Weed Control in Grain Sorghum

Published online by Cambridge University Press:  12 June 2017

R. G. Robinson ,
W. W. Nelson ,
R. L. Thompson  and
J. R. Thompson
R. G. Robinson
Affiliation:
Department of Agronomy and Plant Genetics
W. W. Nelson
Affiliation:
West Central Experiment Station
R. L. Thompson
Affiliation:
West Central Experiment Station
J. R. Thompson
Affiliation:
Southern Experiment Station
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Abstract

Mixtures of CDAA + atrazine or propazine applied pre-emergence gave excellent grass and non-grass weed control and no sorghum injury. Such mixtures offer promise of more consistent weed control than either component alone and less soil residue than a higher rate of atrazine or propazine alone. CDAA + trichlorobenzyl chloride preemergence was a less effective mixture but gave better grass weed control and poorer non-grass control than propazine or atrazine pre- or postemergence. Atrazine or propazine postemergence following CDAA preemergence gave excellent results. The best time to spray sorghum with atrazine or propazine between planting and the 11-leaf stage was when the weeds were in the very early postemergence stage. Sorghum was tolerant at all times of application. Atrazine over all trials averaged superior to propazine as an herbicide for grain sorghum.

Type
Research Article
Information
Weeds , Volume 12 , Issue 2 , April 1964 , pp. 77 - 79
Copyright
Copyright © 1964 Weed Science Society of America 

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References

Literature Cited

1. Robinson, R. G., Thompson, J. R., and Thompson, R. L. 1960. Grain sorghum variety and herbicide trials in Minnesota. Minnesota Agr. Expt. Sta. Misc. Rep. 40:1–6.Google Scholar
2. Robinson, R. G. and Dunham, R. S. 1950. A sprayer for experimental plots. Agron. J. 42:57–58.CrossRefGoogle Scholar
3. Robinson, R. G., Thompson, J. R., Nelson, W. W., and Thompson, R. L. 1961. Mixtures of CDAA and atrazine or propazine for weed control in grain sorghum. Res. Rept. NCWCC 18:61–62.Google Scholar
4. Wiese, A. F. and Rea, H. E. 1962. Treating irrigated grain sorghums with pre-emergence herbicides. Crop Sci. 2:29–31.CrossRefGoogle Scholar