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Differential Tolerance of Rice (Oryza sativa) Varieties to Clomazone

Published online by Cambridge University Press:  20 January 2017

Wei Zhang ,
Eric P. Webster ,
David C. Blouin  and
Steve D. Linscombe
Wei Zhang
Affiliation:
Department of Agronomy, Louisiana State University AgCenter, Baton Rouge, LA 70803
Eric P. Webster*
Affiliation:
Department of Agronomy, Louisiana State University AgCenter, Baton Rouge, LA 70803
David C. Blouin
Affiliation:
Department of Experimental Statistics, Louisiana State University AgCenter, Baton Rouge, LA 70803
Steve D. Linscombe
Affiliation:
Rice Research Station, Louisiana State University AgCenter, Crowley, LA 70527
*
Corresponding author's E-mail: [email protected]
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Abstract

Tolerance of nine rice varieties to clomazone at 1.12 kg ai/ha was evaluated from 2000 to 2002. Rice injury was 27 to 51% at 14 d after treatment (DAT) and reduced to 5 to 30% at 42 DAT with long-grain ‘Drew’ having less injury compared with all medium-grain varieties. Medium- grain ‘Earl’ and ‘LL-401’ were injured most compared with all other varieties at 42 DAT. Plant height was reduced by clomazone with all varieties except Drew at 34 DAT. Clomazone also reduced plant population of Earl, LL-401, and ‘Wells’, but other varieties were not affected at 34 DAT. However, rice grain yield reduction was only observed with LL-401. These results indicate that differential tolerance to clomazone exists among rice varieties.

Keywords

Clomazonerice, Oryza sativa L. ‘Bengal’, ‘Cocodrie’, ‘Cypress’, ‘Drew’, ‘Earl’, ‘CL-141’, ‘LL-401’, ‘LL-601’, ‘Wells’Herbicide toleranceDAT, days after treatmentDPRE, delayed preemergencePPI, preplant incorporatedPRE, preemergence
Type
Research
Information
Weed Technology , Volume 18 , Issue 1 , March 2004 , pp. 73 - 76
Copyright
Copyright © Weed Science Society of America 

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References

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