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Activity of Nicosulfuron, Rimsulfuron, and Their Mixture on Field Corn (Zea mays). Soybean (Glycine max), and Seven Weed Species

Published online by Cambridge University Press:  12 June 2017

Mounir Mekki  and
Gilles D. Leroux
Mounir Mekki
Affiliation:
Dep. Phytologie, Univ. Laval, Ste-Foy, Québec, Canada, G1K 7P4
Gilles D. Leroux
Affiliation:
Dep. Phytologie, Univ. Laval, Ste-Foy, Québec, Canada, G1K 7P4
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Abstract

Seven annual weed species were treated under greenhouse conditions with six rates of either nicosulfuron, rimsulfuron, or a 1:1 mixture (DPX-79406). Herbicide rates in g ai/ha producing 90% dry biomass reduction (GR90) were calculated for each weed species. Accordingly, weeds were classified as very susceptible when GR90 ≤ 9, susceptible when 9 < GR90 ≤ 18, moderately susceptible when 18 < GR90 ≤ 27, and tolerant when, GR90 > 27. Giant and green foxtails were very susceptible to the three herbicides. Proso millet was very susceptible to rimsulfuron and DPX-79406, and susceptible to nicosulfuron. Wild oat was susceptible to nicosulfuron and DPX-79406, and moderately susceptible to rimsulfuron. Redroot pigweed was very susceptible to nicosulfuron; whereas, it was susceptible to rimsulfuron and DPX-79406. Common ragweed and smooth crabgrass were tolerant to the three herbicides. In a second experiment, we used regression estimate analysis with an additive reference model to evaluate nicosulfuron and rimsulfuron interaction on corn, soybean, common ragweed, and smooth crabgrass. We found these herbicides synergistic on smooth crabgrass, antagonistic on soybean, less than additive on common ragweed, and additive on corn.

Keywords

Nicosulfuron, 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-pyridinesulfon midecommon ragweed, Ambrosia artemisiifolia L. # AMBELgiant foxtail, Setaria faberi Herrm. # SETFAgreen foxtail, Setaria viridis L. Beauv. # SETVIproso millet, Panicum miliaceum L. # PANMIredroot pigweed, Amaranthus retroflexus L. # AMAREsmooth crabgrass, Digitaria ischaemum (Schreb. ex Schweig.) Schreb. ex Mühl. # DIGISwild oat, Avena fatua L. # AVEFA)corn, Zea mays L. ‘Pioneer 3971’;soybean, Glycine max L. ‘Maple Glen.’DPX-E9636DPX-V9360DPX-79406AMAREAMBELAVEFADIGISPANMISETFASETVI
Type
Research
Information
Weed Technology , Volume 8 , Issue 3 , September 1994 , pp. 436 - 440
Copyright
Copyright © 1994 by the Weed Science Society of America 

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References

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