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Herbicide Combinations for Control of Volunteer Potato

Published online by Cambridge University Press:  20 January 2017

Rebecca M. Koepke-Hill
Affiliation:
Plant Sciences, University of Tennessee, Knoxville, TN 37996
Gregory R. Armel*
Affiliation:
Plant Sciences, University of Tennessee, Knoxville, TN 37996
Henry P. Wilson
Affiliation:
Eastern Shore Agricultural Research and Extension Center, Virginia Tech, Painter, VA 23420
Thomas E. Hines
Affiliation:
Eastern Shore Agricultural Research and Extension Center, Virginia Tech, Painter, VA 23420
Javier J. Vargas
Affiliation:
Plant Sciences, University of Tennessee, Knoxville, TN 37996
*
Corresponding author's E-mail: garmel@utk.edu.

Abstract

Field studies were conducted to determine if POST applications of the p-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors mesotrione (105 g ai/ha), topramezone (18 g ai/ha), and tembotrione (92 g ai/ha) applied alone and in mixtures with the photosystem-II (PSII) inhibitors atrazine (560 g ai/ha), bentazon (560 g ai/ha), or bromoxynil (280 g ai/ha) would control volunteer potato. Mesotrione alone controlled potato 62%, but topramezone and tembotrione only provided 10 to 22% control by 6 wk after treatment (WAT). All PSII inhibitors applied alone provided less than 36% control of potato. Overall, mixtures of PSII inhibitors plus mesotrione improved initial potato control by 2 WAT; however, by 6 WAT, few differences were observed between mesotrione applied alone or in mixtures with PSII inhibitors. PSII inhibitors did not always improve activity of topramezone or tembotrione on potato, and in some instances appeared to antagonize control. HPPD inhibitors applied alone or in combinations with PSII inhibitors reduced potato yields in comparison to the untreated check.

Se realizaron algunos estudios de campo para determinar si las aplicaciones posteriores de inhibidores p-hydroxy phenylpyruvate dioxygenase (HPPD) de mesotrione (105 g ia/ha), topramezone (18 g ia/ha) y tembotrione (92 g ia/ha aplicados por sí solos o con mezclas de inhibidores fotosistemáticos-II (PSII) de atrazine (560 g ia/ha), bentazon (560 g ia/ha) o bromoxynil (280 g ia/ha) controlarían la papa silvestre. El mesotrione por sí solo controló la maleza en un 62% mientras que el topramezone y el tembotrione solamente proporcionaron del 10 al 22% de control para la sexta semana después del tratamiento (WAT). Todos los inhibidores PSII aplicados por sí solos proporcionaron menos del 36% del control de la papa silvestre. En general todas las mezclas de inhibidores de PSII más mesotrione mejoraron inicialmente el control de la maleza para la segunda semana después del tratamiento (2-WAT). Sin embargo, para las 6 semanas después del tratamiento (WAT), pocas diferencias se observaron entre mesotrione aplicado por sí solo o mezclado con inhibidores PSII. Los inhibidores PSII no siempre mejoraron la actividad de topramezone o tembotrione en la papa silvestre, y en algunas instancias pareció antagonizar el control. Los inhibidores HPPD aplicados por sí solos o en combinaciones con inhibidores PSII redujeron el rendimiento de la papa en comparación con el testigo no tratado.

Type
Weed Management—Major Crops
Copyright
Copyright © Weed Science Society of America 

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References

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