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Carrier Volume Effects on the Antagonism of Sethoxydim by Bentazon

Published online by Cambridge University Press:  12 June 2017

Ralph B. Lassiter Jr.  and
Harold D. Coble
Ralph B. Lassiter Jr.
Affiliation:
Dep. of Crop Sci., North Carolina State Univ., Raleigh, NC 27695-7620
Harold D. Coble
Affiliation:
Dep. of Crop Sci., North Carolina State Univ., Raleigh, NC 27695-7620
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Abstract

The effect of spray carrier volume on the antagonism of sethoxydim {2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one} by bentazon [3-(1-methylethyl)-(1H)-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide] was investigated under greenhouse and field conditions. In the laboratory, the spray droplet overlap between components of a sequential spray application increased from 17 to 50% as carrier volume was increased from 94 to 374 L/ha, respectively. Carrier volume had a significant influence on treatments of sethoxydim alone and sethoxydim sequentially applied with bentazon, but not on the tank mixture of the two herbicides. Carrier volumes of 94 and 187 L/ha used to deliver sethoxydim alone and the sethoxydim/bentazon sequential treatment were superior to the use of 374 L/ha for the control of large crabgrass [Digitaria sanquinalis (L.) Scop. # DIGSA], fall panicum (Panicum dichotomiflorum Michx. # PANDI), and goosegrass (Eleusine indica Gaertn. # ELEIN). There was no difference in grass control between sethoxydim alone and the sequential treatment except at carrier volumes of 187 L/ha or more with which the sequential treatment was less effective. Rates of 0.06 and 0.11 kg ai/ha of sethoxydim were influenced more by changes in carrier volume than 0.22 kg/ha in both the alone and sequential treatments.

Keywords

Spray volumeDigitaria sanquinalisPanicum dichotomiflorumEleusine indicaDIGSAPANDIELEIN
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 35 , Issue 4 , July 1987 , pp. 541 - 546
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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