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Cuphea Tolerates Clopyralid

Published online by Cambridge University Press:  20 January 2017

F. Forcella ,
S. K. Papiernik  and
R. W. Gesch
F. Forcella*
Affiliation:
North Central Soil Conservation Research Laboratory, U.S. Department of Agriculture–Agricultural Research Service, 803 Iowa Avenue, Morris, MN 56267
S. K. Papiernik
Affiliation:
North Central Soil Conservation Research Laboratory, U.S. Department of Agriculture–Agricultural Research Service, 803 Iowa Avenue, Morris, MN 56267
R. W. Gesch
Affiliation:
North Central Soil Conservation Research Laboratory, U.S. Department of Agriculture–Agricultural Research Service, 803 Iowa Avenue, Morris, MN 56267
*
Corresponding author's E-mail: frank.forcella@ars.usda.gov
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Abstract

Cuphea is a new crop of temperate regions that produces seed oil that can substitute for imported coconut and palm kernel oils. Only four herbicides are known to be tolerated by cuphea to date. More herbicides, especially POST products, are needed for continued commercialization. In Minnesota and North Dakota, where cuphea currently is grown, greater control of Canada thistle and biennial wormwood is needed in cuphea. Because clopyralid is effective on both of these species, it was tested at rates ranging from about 25 to 850 g ae ha−1 in greenhouse and field trials. Visual assessment of injury, height, growth, and seed yield of cuphea were not reduced significantly in field-grown plants when clopyralid was applied at rates up to 400 g ae ha−1. Thus, at the rate commonly used in other crops, 200 g ae ha−1, clopyralid can be applied safely to cuphea.

La cufea (Cuphea viscosissima Jacq. × C. lanceolata W.T. Aiton), es un nuevo cultivo de regiones templadas que produce semillas oleaginosas que puede sustituir a los aceites importados de coco y de semillas de palma. Que se conozca, a la fecha solamente existen cuatro herbicidas que la cufea tolera. Se necesitan más herbicidas, especialmente productos POST para una continua comercialización del cultivo. En Minnesota y North Dakota (USA), donde actualmente se cultiva la cufea, se necesita un mejor control de las especies Cirsium arvense y Artemisia biennis. Debido a que clopiralid es efectivo en estas dos especies de maleza, el herbicida se evaluó en estudios de invernadero y de campo, en dosis que variaron de 25 a 850 g ea ha−1. En condiciones de campo, plantas de cufea no fueron significativamente disminuidas ya sea por daño, altura de crecimiento y rendimiento de semilla, cuando clopiralid se aplicó en dosis de hasta 400 g ea ha−1. Por lo tanto, clopiralid en dosis 200 g ea ha−1, que es la cantidad comúnmente utilizada en otros cultivos, puede aplicarse de manera segura a cufea.

Keywords

Clopyralidbiennial wormwood, Artemisia biennis WilldCanada thistle, Cirsium arvense (L.) Scopcuphea, Cuphea viscosissima Jacq. × C. lanceolata W.T. AitonDose responseherbicideinjuryoilseedpostemergencePSR-23tolerance
Type
Notes
Information
Weed Technology , Volume 25 , Issue 3 , September 2011 , pp. 511 - 513
Copyright
Copyright © Weed Science Society of America 

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