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Postemergence Green Foxtail (Setaria viridis) Control in Corn (Zea mays) in Western Canada

Published online by Cambridge University Press:  12 June 2017

Patrick M. McMullan  and
Robert E. Blackshaw
Patrick M. McMullan
Affiliation:
Brandon, MB R7A 5Y3 and Lethbridge, AB T1J 4B1
Robert E. Blackshaw
Affiliation:
Brandon, MB R7A 5Y3 and Lethbridge, AB T1J 4B1
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Abstract

Field research was conducted to determine the effectiveness of DPX-79406 (a 1:1 mixture of nicosulfuron and rimsulfuron) for green foxtail control in field corn. Green foxtail control was similar when DPX-79406 was applied postemergence compared to preplant incorporated EPTC/dichlormid or metolachlor. DPX-79406 gave similar green foxtail control to that of cyanazine and better control than inter-row cultivation following soil-applied herbicides. Green foxtail control was greatest when DPX-79406 was applied at the one- to two-tiller stage compared to the one- to two-leaf stage, suggesting that green foxtail is more susceptible to DPX-79406 at later growth stages. DPX-79406 injured ‘Pioneer 3995’ corn in all trials but injured ‘Pride K020’ corn in only one treatment. DPX-79406 between 15 and 25 g ai/ha gave 85% control of green foxtail with minimal corn injury. Adjuvants tended to increase both corn injury and green foxtail control with Scoil and Merge increasing DPX-79406 activity the most. DPX-79406 provides an effective postemergence alternative for green foxtail control in field corn, for either preplant incorporated herbicides or postemergence cyanazine.

Keywords

Cyanazine, 2-[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl]amino]-2-methylpropanenitriledichlormid, 2,2-dichloro-N,N-di-2-propenylacetamideEPTC, 5-ethyl dipropyl carbamothioatemetolachlor, 2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamidenicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-N,N-dimethyl-3-pyridinecarboxamiderimsulfuron, N-[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]-3-(ethylsulfonyl)-2-pyridinesulfonamidegreen foxtail, Setaria viridis (L.) Beauv. # SETVIcorn, Zea mays L. ‘Pioneer 3995,’ ‘Pride K020.’Adjuvantscultivationgrowth stagepreplant incorporated herbicidecyanazineDPX-79406SETVI
Type
Research
Information
Weed Technology , Volume 9 , Issue 1 , March 1995 , pp. 37 - 43
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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