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Reduced and Standard Herbicide Rates for Grass Control in Rice (Oryza sativa)

Published online by Cambridge University Press:  12 June 2017

Victor F. Carey III ,
Roy J. Smith Jr.  and
Ronald E. Talbert
Victor F. Carey III
Affiliation:
Supv. Res. Agron. (USDA-ARS), Univ. Ark., Fayetteville, AR 72701
Roy J. Smith Jr.
Affiliation:
Dep. Agron., Univ. Ark., Fayetteville, AR 72701
Ronald E. Talbert
Affiliation:
U.S. Dep. Agric., Stuttgart, AR 72160
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Abstract

Field research was conducted in 1988 and 1989 to compare effects of clethodim, fenoxaprop, haloxyfop, and sethoxydim each applied singly and sequentially at full (1X) and reduced (0.5X) rates on barnyardgrass, bearded sprangletop, and rice. A tank-mixture of propanil plus thiobencarb (2.2 + 2.2 kg ha–1) applied sequentially was included as a standard treatment. Control of barnyardgrass and bearded sprangletop was equal to that of the standard treatment both years with 1X rates of clethodim and fenoxaprop, and with 0.5X rates of clethodim, fenoxaprop, and sethoxydim each applied after propanil; rice so treated produced high grain yields. In 1988, severe rice injury occurred after the second application of clethodim at the 0.5X rate, but rice recovered. Grass control costs were reduced 57% with a single application of fenoxaprop at the 1X rate compared with the standard treatment, but net returns were not different.

Keywords

Clethodim, (E,E)-(±)-2-[1-[[(3-chloro-2-propenyhl)oxy]imino]propyol-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-onefenoxaprop, (±)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acidhaloxyfop, 2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]propanoic acidpropanil, N-(3,4-dichlorophenyl)propanamidesethoxydim, 2-[1-(ethoxyimino)butyl]-5-[2-(ethylhio)propyl]-3-hydroxy-2-cyclohexen-1-onethiobencarb, S-[(4-chlorophenyl)methyl]diethylcarbamothioatebarnyardgrass, Echinochloa crus-galli (L.) Beauv., ♯ ECHCGbearded sprangletop, Leptochloa fascicularis (Lam.) Gray, ♯ LEFFArice, Oryza sativa L. ‘Tebonnet’ClethodimfenoxaprophaloxyfopsethoxydimEchinochloa crus-galliLeptochloa fascicularisECHCGLEFFA
Type
Research
Information
Weed Technology , Volume 6 , Issue 2 , June 1992 , pp. 409 - 414
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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