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Chemical Control of Smutgrass (Sporobolus poiretii)

Published online by Cambridge University Press:  12 June 2017

Albert E. Smith
Albert E. Smith*
Affiliation:
Dep. Agron., Univ. of Georgia, Experiment, GA 30212
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Abstract

The influence of herbicide formulation and time of herbicide application on smutgrass [Sporobolus poiretii (Roem. & Schult.) Hitchc.] control and phytotoxicity to the major perennial forage-grass species were determined. Dalapon (2,2-dichloropropionic acid) applied at rates of 4.8 kg/ha and higher gave excellent control regardless of time of application. However, 4.8 kg/ha dalapon applied to Pensacola bahiagrass (Paspalum notátum Flügg ‘Pensacola′) and bermudagrass [Cynodon dactylon (L.) Pers.] in the spring, and to tall fescue (Festuca arundinacea Schreb. ‘Ky 31′) in the fall and spring, was phytotoxic. Applications of tebuthiuron {N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N′-dimethylurea} 80W (80% wettable powder) formulation at 2.4 kg/ha, or fertilizer coated with tebuthiuron at 2.4 kg/ha, gave excellent smutgrass control. The pelleted formulation of tebuthiuron was less phytotoxic to the forage species than the other formulations.

Keywords

Festuca arundinaceaCynodon dactylonPaspalum notatumphytotoxicitydalapontebuthiuron
Type
Research Article
Information
Weed Science , Volume 30 , Issue 3 , May 1982 , pp. 231 - 234
Copyright
Copyright © 1982 by the Weed Science Society of America 

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References

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