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Postemergence Weed Control with Rimsulfuron and Various Adjuvants in Potato (Solanum tuberosum)

Published online by Cambridge University Press:  20 January 2017

Dennis J. Tonks  and
Charlotte V. Eberlein
Dennis J. Tonks*
Affiliation:
Department of Plant, Soil, and Entomological Sciences, University of Idaho, Aberdeen, ID 83210
Charlotte V. Eberlein
Affiliation:
District III Cooperative Extension, University of Idaho, Twin Falls, ID 83303
*
Corresponding author's E-mail: dtonks@wsu.edu.
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Abstract

Field studies assessed weed control and potato injury with rimsulfuron applied postemergence at various rates in combination with various adjuvants. Weed control was influenced by choice of adjuvant and rimsulfuron rate. Rimsulfuron at 0, 9, 18, 26, and 35 g ai/ha was applied with nonionic surfactant (NIS), crop oil concentrate (COC), methylated seed oil (MSO), or silicone-polyether copolymer (SIL). Potato injury was less than 5% for all rimsulfuron rates and adjuvant combinations. Redroot pigweed was controlled greater than or equal to 93% by all treatments except rimsulfuron at 9 g/ha + SIL. Except for redroot pigweed, rimsulfuron treatments with SIL controlled kochia, hairy nightshade, common lambsquarters, and volunteer oats less than with other adjuvants. At lower rimsulfuron rates, weed control with rimsulfuron + MSO tended to be greater than with rimsulfuron + NIS or rimsulfuron + COC. Common lambsquarters control was 75% or less regardless of rimsulfuron rate or adjuvant. Tuber yield generally increased with increasing rimsulfuron rates. Depending on rimsulfuron rate, tuber yield was 10 to 15% lower with rimsulfuron + NIS or rimsulfuron + COC compared to rimsulfuron + MSO, while tuber yield was 18 to 37% lower with rimsulfuron + SIL compared to rimsulfuron + NIS, rimsulfuron + COC, or rimsulfuron + MSO.

Keywords

Rimsulfuroncommon lambsquarters, Chenopodium album L. # CHEALhairy nightshade, Solanum sarrachoides # SOLSAkochia, Kochia scoparia L. Shrad. # KCHSCpotato, Solanum tuberosum L. ‘Russet Burbank’; redroot pigweed, Amaranthus retroflexus L. # AMAREvolunteer oat, Avena sativa L. # AVESACrop oil concentrate, methylated seed oil, nonionic surfactant, organosiliconeCOC, crop oil concentrateMSO, methylated seed oilNIS, nonionic surfactantPNW, Pacific NorthwestPOST, postemergencePRE, preemergenceSIL, silicone-polyether copolymerWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 15 , Issue 4 , December 2001 , pp. 613 - 616
Copyright
Copyright © Weed Science Society of America 

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Footnotes

University of Idaho Agricultural Experiment Station Paper 01701.
Current address of senior author: Washington State University, P.O. Box 399, Davenport, WA 99122

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