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Weed Control and Potato (Solanum Tuberosum) Crop Response With Low Rates of Sulfentrazone Applied Postemergence With Metribuzin

Published online by Cambridge University Press:  20 January 2017

Pamela J.S. Hutchinson ,
Brent R. Beutler  and
Daniel M. Hancock
Pamela J.S. Hutchinson*
Affiliation:
Department of Plant, Soils, and Entomological Science, University of Idaho, 1693 South 2700 West, Aberdeen, ID 83210
Brent R. Beutler
Affiliation:
Department of Plant, Soils, and Entomological Science, University of Idaho, 1693 South 2700 West, Aberdeen, ID 83210
Daniel M. Hancock
Affiliation:
Department of Plant, Soils, and Entomological Science, University of Idaho, 1693 South 2700 West, Aberdeen, ID 83210
*
Corresponding author's E-mail: phutch@uidaho.edu.
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Abstract

Sulfentrazone was applied POST at 13, 26, or 53 g ai/ha alone or in combination with metribuzin at 280 or 420 g ai/ha in field trials conducted with ‘Russet Burbank’ potatoes in 2002 to 2004. Sulfentrazone alone provided less than 84% redroot pigweed, common lambsquarters, and kochia control, although control usually improved to 90% or greater when metribuzin was included. Hairy nightshade control reached 90% only when the highest rates of both herbicides were applied in combination. Sulfentrazone alone did not provide any volunteer oat control, whereas control was 85% when the highest metribuzin rate was included. Potato crop injury, consisting of chlorosis, interveinal blackening of the leaves, eventual necrosis, leaf malformation, and plant stunting, increased as the sulfentrazone rate increased. In contrast, injury decreased as metribuzin rate increased from 0 to 420 g/ha, when averaged across sulfentrazone rates. Reduction in injury levels and increased weed control translated to improved tuber yields as metribuzin rate increased. However, when sulfentrazone was combined with the highest metribuzin rate, potato injury was still relatively high at 26 and 18% at 1 and 4 wk after treatment, and acceptance of sulfentrazone applied POST with metribuzin by potato growers is unlikely.

Keywords

Metribuzinsulfentrazonecommon lambsquarters, Chenopodium album L. #3 CHEALkochia, Kochia scoparia (L.) Shrad. # KCHSCredroot pigweed, Amaranthus retroflexus L. # AMAREhairy nightshade, Solanum sarrachoides Sendtn # SOLSAvolunteer oat, Avena sativa L. # AVESApotato, Solanum tuberosum L. ‘Russet Burbank’Herbicide interactionpotato crop responsesafening effectWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 20 , Issue 4 , December 2006 , pp. 1023 - 1029
Copyright
Copyright © Weed Science Society of America 

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