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Influence of Antidotes on Forage Grass Seedling Response to Metolachlor and Butylate

Published online by Cambridge University Press:  12 June 2017

Timothy S. Griffin ,
Lowell E. Moser  and
Alex R. Martin
Timothy S. Griffin
Affiliation:
Univ. Nebraska-Lincoln, Lincoln, NE 68583-0915
Lowell E. Moser
Affiliation:
Univ. Nebraska-Lincoln, Lincoln, NE 68583-0915
Alex R. Martin
Affiliation:
Univ. Nebraska-Lincoln, Lincoln, NE 68583-0915
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Abstract

Field studies were conducted for 3 yr near Mead, NE, to evaluate the effectiveness of seed safeners CGA-92194 [N-(1,3-dioxalon-2-yl-methoxy)iminobenzeneacetonitrile], NA (1,8-naphthalic anhydride), and R-29148 (2,2-dimethyl-5-methyldichloroacetyloxazolidine) to reduce herbicide injury to big bluestem (Andropogon gerardii Vitman), indiangrass [Sorghastrum nutans (L.) Nash], intermediate wheatgrass [Agropyron intermedium (Host.) Beauv.], sideoats grama [Bouteloua curtipendula (Michx.) Torr.], and switchgrass (Panicum virgatum L.) from preplant-incorporated butylate [5-ethyl bis-(2-methylpropyl)carbamothioate] and metolachlor [2-chloro-N- (2-ethyl-6-methylphenyl) -N- (2-methoxy-l-methylethyl)acetamide], applied at 4.5 and 2.2 kg ai/ha, respectively. Big bluestem stands were satisfactory, regardless of herbicide or safener treatment, although stands were reduced by NA treatment with either herbicide. Indiangrass stands varied by year, with protection from both herbicides by R-29148 in 1984 and by NA in 1985. All safeners reduced injury to intermediate wheatgrass from metolachlor and to a lesser extent from butylate; acceptable stands were obtained with metolachlor treatment when unsafened. Sideoats grama was nearly eliminated with either herbicide, regardless of safener. Switchgrass treated with NA produced stands two- to threefold higher than other safened or unsafened seed in metolachlor plots and equal to unsafened seed in the weeded control plots.

Keywords

Protectantssafenerswarm-season grass seedingsforage grass establishmentmetolachlorbutylate
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 36 , Issue 2 , March 1988 , pp. 202 - 206
Copyright
Copyright © 1988 by the Weed Science Society of America 

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