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Preemergence Herbicides for Potential Use in Potato Production

Published online by Cambridge University Press:  20 January 2017

Rick A. Boydston*
Affiliation:
Agricultural Research Service, United States Department of Agriculture, Irrigated Agriculture Research and Extension Center, Prosser, WA 99350-9687
Joel Felix
Affiliation:
Oregon State University, Malheur Experiment Station, 595 Onion Ave, Ontario, OR, 97914
Kassim Al-Khatib
Affiliation:
University of California, One Shields Avenue, Davis, CA 95616-8621
*
Corresponding author's E-mail: rick.boydston@ars.usda.gov
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Abstract

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Field trials were conducted in 2009 and 2010 near Paterson, WA and Ontario, OR to evaluate weed control and potato tolerance to PRE-applied pyroxasulfone, saflufenacil, and KSU12800 herbicides. Pyroxasulfone at 0.09 to 0.15 kg ai ha−1 and saflufenacil at 0.05 to 0.07 kg ai ha−1 applied PRE alone or in tank mixes with several currently labeled herbicides did not injure potatoes at either site in both years. KSU12800 at 0.15 kg ai ha−1 injured potatoes from 18 to 26% for a period of about 4 wk after emergence at Ontario both years. In addition, KSU12800 at 0.29 and 0.45 kg ha−1 injured potatoes from 17 to 38% at 17 d after treatment (DAT) at Paterson in 2009. Pyroxasulfone at 0.15 kg ha−1 controlled barnyardgrass, hairy nightshade, and redroot pigweed 96% or greater, but control of common lambsquarters was variable. Saflufenacil at 0.07 kg ha−1 provided greater than 93% control of common lambsquarters, hairy nightshade, and redroot pigweed at both sites in 2010. KSU12800 at 0.15 kg ha−1 controlled common lambsquarters, hairy nightshade, and redroot pigweed 99% or more at Ontario, but only 87 to 93% at Paterson in 2010. These herbicides did not reduce yield of U.S. no. 1 tubers or total tuber yields compared to standard labeled herbicide treatments when weed control was adequate.

Se realizaron experimentos de campo en 2009 y 2010 cerca de Paterson, WA y Ontario, OR para evaluar el control de malezas y la tolerancia de la papa a los herbicidas pyroxasulfone, saflufenacil y KSU12800 aplicados PRE. Se aplicó pyroxasulfone a dosis de 0.09 a 0.15 kg ai ha−1 y saflufenacil de 0.05 a 0.07 kg ha−1 solos o en mezclas en tanque con varios herbicidas registrados actualmente para papa sin causar daño al cultivo en ninguno de los sitios en ambos años. KSU12800 a 0.15 kg ha−1 dañó las papas de 18 a 26% por un período de 4 semanas después de la emergencia, en Ontario en ambos años. Adicionalmente, KSU12800 a 0.29 y 0.45 kg ha−1 dañó la papa de 17 a 38% a 17 días después del tratamiento (DAT) en Paterson en 2009. Pyroxasulfone a 0.15 kg ha−1 controló Echinochloa crus-galli, Solanum physalifolium y Amaranthus retroflexus 96% o más, pero el control de Chenopodium album fue variable. Saflufenacil a 0.07 kg ha−1 brindó un control superior a 93% de C. album, S. physalifolium y A. retroflexus en ambos sitios en 2010. KSU12800 a 0.15 kg ha−1 controló C. album, S. physalifolium y A. retroflexus 99% o más en Ontario, pero solamente 87 a 93% en Paterson en 2010. Estos herbicidas no redujeron el rendimiento de los tubérculos U.S. no. 1 ni el rendimiento total de tubérculos en comparación con los tratamientos con herbicidas estándar con etiqueta para este cultivo cuando el control de malezas fue adecuado.

Information

Type
Weed Management—Other Crops/AREAS
Copyright
Copyright © Weed Science Society of America