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Response of Rotational Crops to BAY MKH 6561

Published online by Cambridge University Press:  20 January 2017

Curtis R. Rainbolt ,
Donald C. Thill  and
Daniel A. Ball
Curtis R. Rainbolt*
Affiliation:
Department of Plant, Soil, and Entomological Sciences, University of Idaho, Moscow, ID 83844–2339
Donald C. Thill
Affiliation:
Department of Plant, Soil, and Entomological Sciences, University of Idaho, Moscow, ID 83844–2339
Daniel A. Ball
Affiliation:
Columbia Basin Agricultural Research Center, Oregon State University, Pendleton, OR 97801
*
Corresponding author's E-mail: crainbolt@turbonet.com.
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Abstract

BAY MKH 6561, a sulfonylaminocarbonyl-triazolinone herbicide for postemergence control of annual grasses and selected broadleaf weeds in wheat, was evaluated for weed control and rotational crop (barley, pea, lentil, and mustard) injury in the Pacific Northwest. BAY MKH 6561 was applied postemergence in winter wheat at 22, 45, and 90 g ai/ha during fall 1997 and spring 1998 near Moscow, ID, Pendleton, OR, and Wilcox, WA, to determine its effect on barley, pea, lentil, and mustard planted during spring 1999. At Pendleton, BAY MKH 6561 reduced barley height 6% and grain yield 11%, when applied in the spring at 90 g/ha, and visibly injured mustard 4 to 19% when applied at 45 or 90 g/ha. All BAY MKH 6561 treatments reduced mustard seed yield 47 to 54% at Moscow and 38 to 48% at Wilcox. Pea and lentil seed yields were not affected by herbicide treatments at all locations, whereas barley was not affected at Moscow and Wilcox. In growth chamber soil bioassay experiments, fall-applied BAY MKH 6561 dissipated 10 to 48% faster at Moscow compared to Pendleton, and the predicted half-life ranged from about 68 (Moscow) to 79 d (Pendleton). Dissipation of spring-applied BAY MKH 6561 at 45 and 90 g/ha was 17 to 21% slower at Moscow than Wilcox, and the predicted half-life ranged from 60 (Wilcox) to 69 d (Moscow).

Keywords

BAY MKH 6561, methyl 2-({[(4-methyl-5-oxo-3-propoxy-4,5-dihydro-1H-1,2,4-triazol-1- l)carbonyl]amino}sulfonyl)benzoate sodium saltbarley, Hordeum vulgare L. ‘Baronesse’lentil, Lens culinaris Medic. ‘Pardina’mustard, Sinapsis alba L. ‘Tilney’pea, Pisum sativum L. ‘Columbia’winter wheat, Triticum aestivum L. ‘Cashup’, ‘Madsen’, ‘Stephens’Corn root bioassaydissipationMON 37500pHprecipitationsoil temperaturesoil residuesyieldDAT, days after treatmentOM, organic matterPNW, Pacific NorthwestPOST, postemergencePPI, preplant incorporated
Type
Research
Information
Weed Technology , Volume 15 , Issue 2 , June 2001 , pp. 365 - 374
Copyright
Copyright © Weed Science Society of America 

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