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Factors Influencing Control of Annual Grasses with Sethoxydim or RO-13-8895

Published online by Cambridge University Press:  12 June 2017

Jon P. Chernicky ,
Billy J. Gossett  and
Tim R. Murphy
Jon P. Chernicky
Affiliation:
Agron. Dep., Clemson Univ., Clemson, SC 29631
Billy J. Gossett
Affiliation:
Agron. Dep., Clemson Univ., Clemson, SC 29631
Tim R. Murphy
Affiliation:
Agron. Dep., Clemson Univ., Clemson, SC 29631
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Abstract

Studies were conducted to measure the foliar activity of sethoxydim (BAS 9052 OH) {2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl-3-hydroxy-2-cyclohexen-1-one} and RO-13-8895 {acetone-O-[D-2-[p-[(α,α,α-trifluoro-p-tolyl)-oxy] phenoxy] propionyl] oxime} as affected by adjuvants, soil moisture, and growth stage of grasses, and to compare the responses of three grass species to these herbicides. The activity of both herbicides was increased by adjuvants. The activity of sethoxydim was not significantly affected by soil moisture. Goosegrass [Eleusine indica (L.) Gaertn. ♯3 ELEIN] and broadleaf signalgrass [Brachiaria platyphylla (Griseb. ♯ BRAPP) Nash] control was greater with RO-13-8895 at the high than at the low soil moisture level. Soil moisture did not influence large crabgrass [Digitaria sanguinalis (L.) Scop. ♯ DIGSA] control, since it was relatively tolerant to RO-13-8895. Both herbicides gave greater control at early than at late growth stages. When averaged over all variables, sethoxydim gave greater large crabgrass control than RO-13-8895, but RO-13-8895 gave greater goosegrass and broadleaf signalgrass control than sethoxydim.

Keywords

Digitaria sanguinalisEleusine indicaBrachiaria platyphyllasoil moisture levelsadjuvantsgrowth stagesDIGSAELEINBRAPP
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 32 , Issue 2 , March 1984 , pp. 174 - 177
Copyright
Copyright © 1984 by the Weed Science Society of America 

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