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Annual Grass Control in Corn (Zea mays) with Primisulfuron Combined with Nicosulfuron

Published online by Cambridge University Press:  12 June 2017

Thomas L. Rabaey  and
R. Gordon Harvey
Thomas L. Rabaey
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706-1597
R. Gordon Harvey
Affiliation:
Department of Agronomy, University of Wisconsin, Madison, WI 53706-1597
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Abstract

Efficacy of primisulfuron and reduced rates of nicosulfuron on woolly cupgrass, wild-proso millet, and giant foxtail in field corn was evaluated in 1994 and 1995. Nicosulfuron was applied at 18, 27, and 36 g ai/ha alone and with 20 g ai/ha primisulfuron. Woolly cupgrass control from nicosulfuron at 18 and 27 g/ha was less than control from 36 g/ha (79% and 84% vs. 90%, respectively). Woolly cupgrass control was 5% greater when primisulfuron was combined with nicosulfuron at 27 and 36 g/ha than when nicosulfuron was applied alone. Corn grain yields were similar among all nicosulfuron plus primisulfuron treatments applied to control woolly cupgrass in 1994. In 1995, corn grain yield was increased 900 kg/ha when primisulfuron was combined with nicosulfuron at 18 g/ha compared to nicosulfuron applied at the same rate alone. Wild-proso millet control 3 WAT with nicosulfuron at 18 g/ha was less than control with nicosulfuron at 36 g/ha. Wild-proso millet control 8 WAT with nicosulfuron alone was greater than when nicosulfuron at any rate was applied with primisulfuron. No differences in corn grain yields were observed across nicosulfuron rates or combinations with primisulfuron to control wild-proso millet either year. Giant foxtail control and corn grain yield were not affected by nicosulfuron rate or combined applications of nicosulfuron and primisulfuron either year.

Keywords

Nicosulfuron, 2-[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]-N,N-dimethyl-3-pyridinecarboxamideprimisulfuron, 2-[[[[[4,6-bis(difluoromethoxy)-2-pyrimidinyl]amino]carbonyl]amino]sulfonyl]benzoic acidgiant foxtail, Setaria faberi Herrm. # SETFAwild-proso millet, Panicum miliaceum L. ssp. ruderale (Kitagawa) Tzevelev. # PANMIwoolly cupgrass, Eriochloa villosa (Thunb.) Kunth # ERBVIcorn, Zea mays L., ‘Pioneer 3751.’Herbicide combinationsreduced ratesEriochloa villosaPanicum miliaceumSetaria faberiERBVIPANMISETFAWAT, weeks after POST treatment
Type
Research
Information
Weed Technology , Volume 11 , Issue 1 , March 1997 , pp. 171 - 175
Copyright
Copyright © 1997 by the Weed Science Society of America 

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