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Oat (Avena sativa) Response to Imazapic Residues

Published online by Cambridge University Press:  20 January 2017

Eric P. Prostko ,
Timothy L. Grey ,
Robert N. Morgan  and
Jerry W. Davis
Eric P. Prostko*
Affiliation:
Department of Crop & Soil Sciences, The University of Georgia, P.O. Box 1209, Tifton, GA 31794
Timothy L. Grey
Affiliation:
Department of Crop & Soil Sciences, The University of Georgia, P.O. Box 1209, Tifton, GA 31794
Robert N. Morgan
Affiliation:
Department of Crop & Soil Sciences, The University of Georgia, P.O. Box 1209, Tifton, GA 31794
Jerry W. Davis
Affiliation:
University of Georgia, 1109 Experiment Street, Griffin, GA 30223
*
Corresponding author's E-mail: [email protected]
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Abstract

Three field trials were conducted in south Georgia under irrigated conditions in 2002/2003 and 2003/2004 to evaluate the effects of imazapic residues on oat growth and yield. Imazapic at 70 g ai/ha was applied during the first weeks of May, June, July, August, and September to bare soil. No additional tillage was performed after the herbicide application. Oats (cv. Coker 227) were planted the first week of October. Oat plant populations were not reduced by any timing of imazapic. Generally, oat plant heights and forage yields were reduced when imazapic was applied in August and September (1–2 mo before planting). Grain yields were not reduced by any timing of imazapic. Results of these tests suggest that the current 18-mo rotational restriction for oats following an application of imazapic could be reduced to 4 mo.

Keywords

Imazapicoats, Avena sativa L. ‘Coker 227’Carryovercrop rotationsherbicide persistenceimidazolinoneplant-back restrictionsDAPdays after planting
Type
Research Article
Information
Weed Technology , Volume 19 , Issue 4 , December 2005 , pp. 875 - 878
Copyright
Copyright © Weed Science Society of America 

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