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Weed Control with Fall and Early-Preplant Herbicide Applications in No-Till Soybean

Published online by Cambridge University Press:  20 January 2017

Ryan F. Hasty ,
Christy L. Sprague  and
Aaron G. Hager
Ryan F. Hasty
Affiliation:
Department of Crop Sciences, University of Illinois, 1102 South Goodwin Avenue, Urbana, IL 61801
Christy L. Sprague*
Affiliation:
Department of Crop Sciences, University of Illinois, 1102 South Goodwin Avenue, Urbana, IL 61801
Aaron G. Hager
Affiliation:
Department of Crop Sciences, University of Illinois, 1102 South Goodwin Avenue, Urbana, IL 61801
*
Corresponding author's E-mail: [email protected]
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Abstract

Field studies were conducted during 1999 and 2000 to compare weed control after fall and early-preplant (EPP) herbicide applications in no-till soybean. Three residual treatments (chlorimuron plus metribuzin, chlorimuron plus sulfentrazone, and metribuzin) were applied at two rates and timings (fall and 30 d EPP) either alone or in combination with glyphosate and 2,4-D. The addition of glyphosate and 2,4-D to fall-applied residual herbicides significantly increased control of common chickweed, annual bluegrass, cressleaf groundsel, and shepherd's-purse. The effect of application rate on weed control was species dependent. Fall-applied residual herbicides were comparable with EPP treatments with respect to winter annual weed control; however, at planting control of summer annual weed species with fall treatments was less consistent compared with EPP residual herbicides.

Keywords

Chlorimuronglyphosatemetribuzinsulfentrazone2,4-D esterannual bluegrass, Poa annua L. #3 POAANcommon chickweed, Stellaria media L. Vill. # STEMEcressleaf groundsel, Senecio glabellus Poir. # SENGLshepherd's-purse, Capsella bursa-pastoris (L.) Medicus # CAPBPsoybean, Glycine max (L.) MerrAMATAAMBELAMBTRCHEALfall appliedLAMAMLAMPUno tillresidual controlwinter annualsEPP, early preplant.
Type
Research
Information
Weed Technology , Volume 18 , Issue 4 , December 2004 , pp. 887 - 892
Copyright
Copyright © Weed Science Society of America 

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References

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