Preemergence Herbicides for Potential Use in Potato Production Public Deposited

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This is the author's peer-reviewed final manuscript, as accepted by the publisher. The article is copyrighted by the Weed Science Society of America and published by Allen Press. It can be found at:  http://www.wssajournals.org/loi/wete. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work.

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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.
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  • Rick A. Boydston, Joel Felix, & Kassim Al-Khatib (2012) Preemergence Herbicides for Potential Use in Potato Production. Weed Technology: October-December, Vol. 26, No. 4, pp. 731-739.
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