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Broadleaf Weed Control and Potato Crop Safety with Postemergence Rimsulfuron, Metribuzin, and Adjuvant Combinations

Published online by Cambridge University Press:  20 January 2017

Pamela J. S. Hutchinson ,
Charlotte V. Eberlein  and
Dennis J. Tonks
Pamela J. S. Hutchinson*
Affiliation:
Department of Plant, Soil, and Entomological Sciences, University of Idaho, Aberdeen, ID 83210
Charlotte V. Eberlein
Affiliation:
Cooperative Extension, University of Idaho, Twin Falls, ID 83303
Dennis J. Tonks
Affiliation:
Washington State University, Davenport, WA 99122
*
Corresponding author's E-mail: [email protected]
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Abstract

The effects of postemergence rimsulfuron, metribuzin, and adjuvant combinations on potato crop safety and weed control were evaluated in field studies conducted at the University of Idaho Aberdeen Research and Extension Center in 1999 and 2000. Rimsulfuron at 26 g ai/ha plus metribuzin at 0, 140, or 280 g ai/ha was combined with nonionic surfactant (NIS), crop oil concentrate (COC), or methylated seed oil (MSO) in a 3 by 3 factorial with two controls. Under cool, cloudy conditions in 1999, initial ‘Russet Burbank’ potato injury was greater when metribuzin was included in the tank mixture than when rimsulfuron was applied alone, regardless of adjuvant. Under warmer conditions in 2000, however, adding MSO or COC to the tank mixture caused more injury than adding NIS. Rimsulfuron did not provide acceptable season-long common lambsquarters control in 1999 (76%) or in 2000 (88%), regardless of adjuvant. Rimsulfuron combined with metribuzin at 140 or 280 g/ha provided ≥95% common lambsquarters control both years, regardless of adjuvant. Among adjuvants, using MSO (1999 and 2000) or COC (2000) in the spray mixture improved common lambsquarters control compared with using NIS. Tuber yield and quality were not reduced as a result of metribuzin rate or adjuvant treatments either year compared with the weed-free control.

Keywords

Metribuzinrimsulfuroncommon lambsquarters, Chenopodium album L. # CHEALpotato, Solanum tuberosum L. ‘Russet Burbank’Crop oil concentratecrop safetyherbicide injurymethylated seed oilnonionic surfactantALS, acetolactate synthaseCOC, crop oil concentrateMSO, methylated seed oilNIS, nonionic surfactantPNW, Pacific NorthwestPOST, postemergencePRE, preemergenceWAT, weeks after treatment
Type
Research
Information
Weed Technology , Volume 18 , Issue 3 , September 2004 , pp. 750 - 756
Copyright
Copyright © Weed Science Society of America 

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Footnotes

∗ Publication 03738 University of Idaho Agricultural Experiment Station.

References

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