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Rice Response to Clomazone as Influenced by Application Rate, Soil Type, and Planting Date

Published online by Cambridge University Press:  20 January 2017

John H. O'Barr ,
Garry N. McCauley ,
Rodney W. Bovey ,
Scott A. Senseman  and
James M. Chandler
John H. O'Barr*
Affiliation:
Soil & Crop Sciences Department, Texas Agricultural Experiment Station, Texas A&M University, College Station, TX 77843–2474
Garry N. McCauley
Affiliation:
Department of Soil & Crop Sciences, Texas Agricultural Experiment Station, Box 717, Eagle Lake, TX 77534
Rodney W. Bovey
Affiliation:
Department of Rangeland Ecology and Management, Texas A&M University, College Station, TX 77843
Scott A. Senseman
Affiliation:
Soil & Crop Sciences Department, Texas Agricultural Experiment Station, Texas A&M University, College Station, TX 77843–2474
James M. Chandler
Affiliation:
Soil & Crop Sciences Department, Texas Agricultural Experiment Station, Texas A&M University, College Station, TX 77843–2474
*
Corresponding author's E-mail: john.obarr@basf.com
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Abstract

Clomazone is an effective herbicide widely used for PRE grass control in rice. However, use of clomazone on sandy textured soils of the western Texas rice belt can cause serious rice injury. Two field experiments at three locations were conducted in 2002 and 2003 to determine the optimum rate range that maximizes barnyardgrass and broadleaf signalgrass control and minimizes rice injury across a wide variety of soil textures and planting dates. At Beaumont (silty clay loam), Eagle Lake (fine sandy loam), and Ganado (fine sandy loam), TX, PRE application of 0.34 kg ai/ha clomazone applied to rice planted in March, April, or May optimized barnyardgrass and broadleaf signalgrass control and rice yield while minimizing rice injury. Data suggest that, although injury might occur, clomazone is safe to use in rice on sandy textured soils.

Keywords

Clomazone, barnyardgrass, Echinochloa crus-galli (L.) Beauv. ECHCGbroadleaf signalgrass, Brachiaria platyphylla BRAPPrice, Oryza sativa L.Crop tolerancesoil-pesticide interaction
Type
Research
Information
Weed Technology , Volume 21 , Issue 1 , March 2007 , pp. 199 - 205
Copyright
Copyright © Weed Science Society of America 

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