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KIH-485 and S-metolachlor Efficacy Comparisons in Conventional and No-Tillage Corn

Published online by Cambridge University Press:  20 January 2017

Patrick W. Geier,
Phillip W. Stahlman and
John C. Frihauf
Patrick W. Geier*
Affiliation:
Kansas State University Agricultural Research Center, Hays, KS 67601
Phillip W. Stahlman
Affiliation:
Kansas State University Agricultural Research Center, Hays, KS 67601
John C. Frihauf
Affiliation:
Kansas State University Agricultural Research Center, Hays, KS 67601
*
Corresponding author's E-mail: pgeier@ksu.edu
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Abstract

Field experiments were conducted during 2003 and 2004 to compare the effectiveness of KIH-485 and S-metolachlor for PRE weed control in no-tillage and conventional-tillage corn. Longspine sandbur control increased as KIH-485 or S-metolachlor rates increased in conventional-tillage corn, but control did not exceed 75% when averaged over experiments. Both herbicides controlled at least 87% of green foxtail with the exception of no-tillage corn in 2004, when KIH-485 was more effective than S-metolachlor at lower rates. Palmer amaranth control ranged from 85 to 100% in 2003 and 80 to 100% in 2004, with the exception of only 57 to 76% control at the lowest two S-metolachlor rates in 2004. Puncturevine control exceeded 94% with all treatments in 2003. In 2004, KIH-485 controlled 86 to 96% of the puncturevine, whereas S-metolachlor controlled only 70 to 81%. Mixtures of atrazine with KIH-485 or S-metolachlor generally provided the most effective control of broadleaf weeds studied.

Keywords

AtrazineKIH-485S-metolachlorPalmer amaranth, Amaranthus palmeri S. Wats. #3 AMAPAgreen foxtail, Setaria viridis (L.) Beauv. # SETVIpuncturevine, Tribulus terrestris L. # TRBTElongspine sandbur, Cenchrus longispinus (Hack.) Fern. # CCHPAcorn, Zea mays L.Tillage systemsbest management practicesBMP, best management practicesDAT, days after herbicide treatmentKow, herbicide adsorption coefficient

Information

Type
Research Article
Information
Weed Technology , Volume 20 , Issue 3 , September 2006, pp. 622 - 626
Copyright
Copyright © Weed Science Society of America 

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