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Fenoxaprop Interactions for Barnyardgrass (Echinochloa crus-galli) Control in Rice

Published online by Cambridge University Press:  20 January 2017

Wei Zhang ,
Eric P. Webster ,
David C. Blouin  and
Christopher T. Leon
Wei Zhang
Affiliation:
Department of Agronomy and Environmental Management, 104 Sturgis Hall, Louisiana State University AgCenter, Baton Rouge, LA 70803
Eric P. Webster*
Affiliation:
Department of Agronomy and Environmental Management, 104 Sturgis Hall, Louisiana State University AgCenter, Baton Rouge, LA 70803
David C. Blouin
Affiliation:
Department of Experimental Statistics, 45 Agricultural Administration Building, Louisiana State University AgCenter, Baton Rouge, LA 70803
Christopher T. Leon
Affiliation:
Department of Agronomy and Environmental Management, 104 Sturgis Hall, Louisiana State University AgCenter, Baton Rouge, LA 70803
*
Corresponding author's E-mail: ewebster@agctr.lsu.edu
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Abstract

A study was conducted in 2000 and 2001 to evaluate interaction of fenoxaprop with other herbicides for barnyardgrass control in rice. Changes in herbicide interaction over time were also evaluated, and herbicide combinations were ranked on the basis of compatibility. Fenoxaprop at 0.075 kg/ha plus bentazon or propanil plus molinate resulted in an additive response for barnyardgrass control at 10, 20, and 30 d after treatment (DAT); however, when the rate of fenoxaprop increased to 0.089 kg/ha, an antagonistic effect was found. Carfentrazone and halosulfuron consistently antagonized the activity of fenoxaprop at both rates on barnyardgrass. Bensulfuron at 10 and 20 DAT and triclopyr at 20 DAT were antagonistic to fenoxaprop. An increase in interaction over time was detected when fenoxaprop at 0.089 kg/ha was applied in mixture with carfentrazone at 0.04 kg/ha or halosulfuron at 0.05 kg/ha. These results indicate that propanil plus molinate and bentazon are more compatible with fenoxaprop at 0.075 kg/ha for barnyardgrass control, whereas bensulfuron, carfentrazone, halosulfuron, and triclopyr can antagonize fenoxaprop activity on barnyardgrass.

Keywords

Bensulfuronbentazoncarfentrazonefenoxaprophalosulfuronmolinatepropaniltriclopyrbarnyardgrass, Echinochloa crus-galli (L.) Beauv. # ECHCGrice, Oryza sativa L. ‘Cocodrie’AntagonismsynergismDAT, days after treatmentNLMIXED, nonlinear mixed procedurePOST, postemergence
Type
Research Article
Information
Weed Technology , Volume 19 , Issue 2 , June 2005 , pp. 293 - 297
Copyright
Copyright © Weed Science Society of America 

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