Compositions comprising pyridine carboxylate herbicides with synthetic auxin herbicides or auxin transport inhibitors
Inventors
Satchivi, Norbert M. • Kister, Jeremy
Assignees
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Publication Number
US-12568967-B2
Publication Date
2026-03-10
Expiration Date
Abstract
Disclosed herein are compositions comprising (a) a pyridine carboxylate herbicide or an agriculturally acceptable N-oxide, salt, or ester thereof and (b) a synthetic auxin herbicide, an auxin transport inhibitor, agriculturally acceptable salts or esters thereof, or combinations thereof. Also disclosed herein are methods of controlling undesirable vegetation, comprising applying to vegetation or an area adjacent the vegetation or applying in soil or water to control the emergence or growth of vegetation (a) a pyridine carboxylate herbicide or an agriculturally acceptable N-oxide, salt, or ester thereof and (b) a synthetic auxin herbicide, an auxin transport inhibitor, agriculturally acceptable salts or esters thereof, or combinations thereof.
Core Innovation
The invention relates to herbicide compositions comprising a pyridine carboxylate herbicide and a synthetic auxin herbicide and/or an auxin transport inhibitor, including agriculturally acceptable salts or esters thereof, or combinations thereof. The pyridine carboxylate herbicide is propargyl 4-amino-3-chloro-5-fluoro-6-(7-fluoro-1H-indol-6-yl)pyridine-2-carboxylate. The composition constrains the weight ratio of the pyridine carboxylate herbicide in g ae to the synthetic auxin herbicide or auxin transport inhibitor in g ai from 1:200 to 20:1.
The invention also provides a method of controlling undesirable vegetation by applying the composition to vegetation or an area adjacent the vegetation, or by applying it to soil or water to limit the emergence or growth of vegetation. In the method, the pyridine carboxylate herbicide is applied in an amount of at least 0.1 g ae/ha, and the synthetic auxin herbicide or auxin transport inhibitor is applied in an amount of at least 1 g ai/ha. The same weight ratio constraint from 1:200 to 20:1 is maintained.
The disclosed examples report % visual injury and crop phytotoxicity for compositions containing Compound A in combination with synthetic auxin herbicides and/or auxin transport inhibitors, including clopyralid, halauxifen-methyl, fluroxypyr, aminopyralid, dicamba, quinclorac, 2,4-D, bromoxynil, diflufenzopyr, chlorflurenol-methyl, mecoprop, dichlorprop, MCPA, MCPA-2-ethylhexyl, 2,4-D-2-ethylhexyl, florpyrauxifen-benzyl, 2,4-DB, aminocyclopyrachlor, picloram, and triclopyr. The testing is described across multiple weed species and crop species, including spring wheat, spring barley, winter wheat, and winter barley.
Claims Coverage
The independent claims are directed to a herbicide composition and a method of controlling undesirable vegetation. Across these claims, the core inventive features are the specific pyridine carboxylate herbicide, the synthetic auxin herbicide and/or auxin transport inhibitor component, the defined weight ratio from 1:200 to 20:1, and the method claim’s minimum application amounts.
Specific pyridine carboxylate herbicide with auxin component
A composition comprising a pyridine carboxylate herbicide wherein the pyridine carboxylate herbicide compound is propargyl 4-amino-3-chloro-5-fluoro-6-(7-fluoro-1H-indol-6-yl)pyridine-2-carboxylate, and a synthetic auxin herbicide, an auxin transport inhibitor, agriculturally acceptable salts or esters thereof, or combinations thereof.
Defined pyridine carboxylate to auxin component weight ratio
The weight ratio of the pyridine carboxylate herbicide in g ae to the synthetic auxin herbicide or auxin transport inhibitor in g ai is from 1:200 to 20:1.
Controlling undesirable vegetation by applying the composition
A method of controlling undesirable vegetation comprising applying to vegetation or an area adjacent the vegetation or applying to soil or water to limit the emergence or growth of vegetation a composition comprising the pyridine carboxylate herbicide propargyl 4-amino-3-chloro-5-fluoro-6-(7-fluoro-1H-indol-6-yl)pyridine-2-carboxylate and the synthetic auxin herbicide or auxin transport inhibitor.
Minimum application amounts in the method
The pyridine carboxylate herbicide is applied in an amount of at least 0.1 g ae/ha, and the synthetic auxin herbicide or auxin transport inhibitor is applied in an amount of at least 1 g ai/ha.
Claim coverage centers on combining propargyl 4-amino-3-chloro-5-fluoro-6-(7-fluoro-1H-indol-6-yl)pyridine-2-carboxylate with a synthetic auxin herbicide and/or an auxin transport inhibitor under a weight ratio of 1:200 to 20:1. The method claim further requires minimum application amounts for both components and applies the composition to vegetation, adjacent areas, soil, or water to limit emergence or growth.
Stated Advantages
Unexpectedly enhanced herbicidal effect when combining pyridine carboxylate herbicide component (a) with synthetic auxin herbicide/auxin transport inhibitor component (b) within the described actives limitation.
Controls undesirable vegetation by limiting emergence or growth of vegetation.
Substantial injury is reported for many undesirable weed species when the pyridine carboxylate herbicide is combined with companion herbicides.
Grain crops show minimal injury under the described companion herbicide-only control conditions.
Documented Applications
Controlling undesirable vegetation by applying the composition to vegetation or an area adjacent the vegetation, or applying to soil or water to limit the emergence or growth of vegetation.
Herbicidal efficacy testing and crop phytotoxicity evaluation, including % visual injury measurements, across multiple weed species and crop species such as winter/spring wheat and winter/spring barley.
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