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The Potential for Clomazone Use in Rice (Oryza Sativa)

Published online by Cambridge University Press:  12 June 2017

Eric P. Webster,
Ford L. Baldwin and
Tomilea L. Dillon
Eric P. Webster*
Affiliation:
University of Arkansas Southeast Research and Extension Center, Monticello, AR 71656
Ford L. Baldwin
Affiliation:
Arkansas Cooperative Extension Service, Little Rock, AR 72203
Tomilea L. Dillon
Affiliation:
Arkansas Cooperative Extension Service, Little Rock, AR 72203
*
Corresponding author's E-mail: ewebster@agctr.lsu.edu.
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Abstract

Clomazone was applied preplant incorporated, preemergence, delayed preemergence, or postemergence and compared to pendimethalin, quinclorac, and thiobencarb for control of barnyardgrass in rice. Seven days after the clomazone postemergence application, all clomazone treatments except those applied postemergence controlled barnyardgrass ≥ 86%. At 49 d after the postemergence application, control of barnyardgrass with 0.56 and 0.67 kg/ha clomazone postemergence improved to 92 and 93%, respectively. Clomazone and quinclorac applied delayed preemergence generally controlled barnyardgrass less than 70%. Visible injury to rice was ≤ 18% 7 d after emergence and had declined to less than 10% when evaluated 7 d after postemergence treatments. Rice yields were higher with all treatments compared to the nontreated control.

Keywords

Clomazone, 2-[(chlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidinonependimethalin, N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenaminequinclorac, 3,7-dichloro-8-quinolinecarboxylic acidthiobencarb, S-[(4-chlorophenyl)methyl]diethylcarbamothioate, barnyardgrass, Echinochloa crus-galli (L.) Beauv. #ECHCGrice, Oryza sativa L. ‘Lemont.’PendimethalinquincloracthiobencarbEchinochloa crus-galliDAE, days after emergenceDAPOST, days after postemergenceDPRE, delayed preemergenceEC, emulsifiable concentrateME, microencapsulatedPOST, postemergencePPI, preplant incorporatedPRE, preemergencePTO, power takeoff

Information

Type
Research
Information
Weed Technology , Volume 13 , Issue 2 , June 1999, pp. 390 - 393
Copyright
Copyright © 1999 by the Weed Science Society of America 

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Footnotes

1

Published with the permission of the Director of the Agricultural Experiment Station, Fayetteville, AR 72701.

Current address of first author: Assistant Professor, Department of Plant Pathology and Crop Physiology, Louisiana State University Agricultural Center, Baton Rouge, LA 70803.

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