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The Toxicity of EPTC to Nutsedge

Published online by Cambridge University Press:  12 June 2017

E. C. Holt ,
J. A. Long  and
W. Wayne Allen
E. C. Holt
Affiliation:
Department of Agronomy, Texas Agricultural Experiment Station
J. A. Long
Affiliation:
formerly Texas Agricultural Experiment Station, presently Geneticist, Scotts, Marysville, Ohio
W. Wayne Allen
Affiliation:
formerly Texas Agricultural Experiment Station, presently Agronomist, U. S. Golf Association Green Section, College Station, Texas
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Abstract

Nutsedge tubers germinated readily in soil treated with EPTC. However, growth was suppressed and emergence delayed, the delay depending on the rate of application. EPTC at 12 and 16 pounds per acre with 8 and 12 weeks exposure was very effective in killing nutsedge tubers as indicated by tuber germination and condition of tubers that did not germinate.

The granular formulation of EPTC killed highly significantly more nutsedge tubers than the emulsifiable formulation. Repeat applications of EPTC were significantly better in terms of tubers killed than single applications of the same rate of the herbicide. Thorough incorporation of EPTC to a depth of 5 inches of mechanical means was significantly more effective than incorporation by leaching.

Type
Research Article
Information
Weeds , Volume 10 , Issue 2 , April 1962 , pp. 103 - 105
Copyright
Copyright © 1962 Weed Science Society of America 

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References

Literature Cited

1. Hauser, E. W. 1959. A preliminary study of the interaction of herbicides and potassium gibberellin on nutgrass (Cyperus rotundus L.) Proc. SWC 12:196.Google Scholar
2. Hauser, E. W. and Thompson, J. T. 1959. (Abstract) Rate of infestation of nutgrass (Cyperus rotundus L.) from space-planted tubers. Proc. SWC 12:178–179.Google Scholar
3. Orsenigo, J. R. 1959. Effect of rate and number of EPTC applications and method of incorporation on control of nutgrass and annual weeds. Proc. SWC 12:194.Google Scholar
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