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Efficacy of Clomazone Applied at Various Timings in Soybean (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Steven J. Langton ,
R. Gordon Harvey  and
John W. Albright
Steven J. Langton
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706
R. Gordon Harvey
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706
John W. Albright
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706
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Abstract

Field studies conducted in 1991 to 1993 evaluated the efficacy of clomazone applied at various timings for weed control in soybean. Clomazone applied 45, 30, 15, or 0 days prior to planting (DPP) provided season-long control of velvetleaf and giant foxtail. In 1991 and 1992 clomazone alone 30 and 45 DPP failed to control redroot pigweed. Clomazone alone 45 DPP failed to control common lambsquarters. In 1991 and 1992 clomazone at 0.84 kg/ha plus metribuzin applied 45 DPP failed to control redroot pigweed. The addition of metribuzin plus chlorimuron to the above clomazone treatments resolved these weed control deficiencies. Weed control in 1993 was nearly complete across all clomazone treatments. In 1993 clomazone treatments which included metribuzin or metribuzin plus chlorimuron applied PPI or PRE reduced yield. Herbicide injury is the likely cause of this reduction because most treatments in 1993 provided 99% control of all weed species.

Keywords

Chlorimuron, 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoic acidclomazone, 2-[(2-chlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidinonemetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-onecommon lambsquarters, Chenopodium album L. # CHEALgiant foxtail, Setaria faberi Herrm. # SETFAredroot pigweed, Amaranthus retroflexus L. # AMAREvelvetleaf, Abutilon theophrasti Medicus # ABUTHsoybean, Glycine max (L.) Merr.Conservation tillageherbicide injuryoff-site movementvolatilizationchlorimuronmetribuzinAbutilon theophrastiAmaranthus retroflexusChenopodium albumSetaria faberiABUTHAMARECHEALSETFADAP, days after plantingDPP, days prior to plantingEPP, early preplant
Type
Research
Information
Weed Technology , Volume 11 , Issue 1 , March 1997 , pp. 105 - 109
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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