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Application Timing and Corn (Zea mays) Residue Effects on Weed Control from Metribuzin plus Metolachlor

Published online by Cambridge University Press:  12 June 2017

Fritz K. Koppatschek ,
Rex A. Liebl  and
Fred W. Slife
Fritz K. Koppatschek
Affiliation:
Emeritus, Dep. Agron., Univ. Illinois, 1102 S. Goodwin Ave., Urbana, IL 61801
Rex A. Liebl
Affiliation:
Emeritus, Dep. Agron., Univ. Illinois, 1102 S. Goodwin Ave., Urbana, IL 61801
Fred W. Slife
Affiliation:
Emeritus, Dep. Agron., Univ. Illinois, 1102 S. Goodwin Ave., Urbana, IL 61801
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Abstract

Field and laboratory studies were conducted in 1985 and 1986 to determine the effect of herbicide application timing and level of corn residue on metribuzin plus metolachlor for weed control in soybean. Herbicides were applied early preplant (35 days before planting), sequentially (early preplant and preemergence), or preemergence. Giant foxtail control was better with sequential application than early preplant herbicide application in both years. Control of velvetleaf, smooth pigweed, and jimsonweed was independent of application timing, except in 1986, when jimsonweed control was less from herbicides applied early preplant compared to sequentially. Metribuzin reaching the soil was less when applied to high levels of corn residue compared to low residue levels. However, corn residue level had no effect on weed control.

Keywords

Corn, Zea mays L. ‘Pioneer 3377′soybean, Glycine max L. Merr. ‘Wells’giant foxtail, Setaria faberi Herm. ♯3 SETFAvelvetleaf, Abutilon theophrasti Medik. ♯ ABUTHsmooth pigweed, Amaranthus hybridus L. ♯ AMACHjimsonweed, Datura stramonium L. ♯ DATSTmetribuzin, 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-onemetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl) acetamideDegradationABUTHAMACHDATSTSETFA
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 37 , Issue 3 , May 1989 , pp. 345 - 349
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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