Method for controlling herbicide resistant or tolerant weeds

Patent metadata

Field	Value
Publication number	US-12336536-B2
Application number	US-201615741454-A
Country	US
Kind code	B2
Filing date	Jul 6, 2016
Priority date	Jul 10, 2015
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

The present invention relates to methods and uses for controlling herbicide resistant or tolerant weed species by applying the herbicidal compound (±)-2-exo-(2-Methylbenzyloxy)-1-methyl-4-isopropyl-7-oxabicyclo[2.2.1]heptane, any of its individual enantiomers or any non-racemic mixture thereof. The methods and uses are particularly suitable for the protection of crops. The invention also relates to specific herbicidal compositions comprising said herbicidal compound.

First claim

The invention claimed is:

1. A method for controlling undesirable vegetation which comprises applying to the vegetation or the locus thereof a herbicidally effective amount of (±)-2-exo-(2-methylbenzyloxy)-1-methyl-4-isopropyl-7-oxabicyclo [2.2.1]heptane, any of its individual enantiomers or any non-racemic mixture thereof (herbicide A) wherein:
the undesirable vegetation comprises at least one herbicide resistant or tolerant weed species which is selected from (A) Poa annua and (B) Digitaria insularis;
the herbicide resistant or tolerant weed species is a biotype with resistance or tolerance to at least one herbicide selected from the group consisting of acetyl COA carboxylase (ACCase) inhibitors, acetolactate synthase (ALS) inhibitors, and photosystem II (PS II) inhibitors;
the herbicide A is the only herbicidally active ingredient;
the herbicide A is applied in an amount of (A) 50 to 500 g/ha when the herbicide resistant or tolerant weed species is Poa annua or (B) 10 to 250 g/ha when the herbicide resistant or tolerant weed species is Digitaria insularis,
the herbicide A is applied before emergence of the undesirable vegetation,
the herbicide A has a herbicidal activity of at least 85 against the at least one herbicide resistant or tolerant weed species,
the herbicide A has a herbicidal activity of at least 85 against a sensitive standard of the at least one weed species when applied in the same amount as against the at least one herbicide resistant of tolerant weed species, and
the herbicidal activity is expressed as a percentage of weed aerial moieties destroyed by application of the herbicide A.

2. The method of claim 1 , wherein the herbicide A is (±)-2-exo-(2-methylbenzyloxy)-1-methyl-4-isopropyl-7-oxabicyclo [2.2.1]heptane.

3. The method of claim 1 , wherein the undesirable vegetation is controlled in crop plants selected from wheat, barley, rye, triticale , oat, corn (maize), sunflower, rice, soybeans, peas, Vicia -beans, Phaseolus -beans, peanuts, oilseed rape, canola, cotton, potato, sugarbeet, sugarcane, turfgrasses and vegetables.

4. The method of claim 1 , further comprising applying at least one safener C selected from the group consisting of benoxacor, cloquintocet, cyometrinil, cyprosulfamide, dichlormid, dicyclonon, dietholate, fenchlorazole, fenclorim, flurazole, fluxofenim, furilazole, isoxadifen, mefenpyr, mephenate, naphthaleneacetic acid (NAA), naphthalic anhydride (NA), oxabetrinil, 4 (dichloroacetyl)-1-oxa-4-azaspiro[4.5]decane (MON4660), 2,2,5-trimethyl-3-(dichloroacetyl)-1,3-oxazolidine (R 29148), N-(2-Methoxybenzoyl)-4-[(methylaminocarbonyl) amino]benzenesulfonamide and agriculturally acceptable salts, esters or amides thereof.

5. The method of claim 1 , further comprising applying one or more auxiliaries customary in crop protection.

6. The method of claim 1 , wherein a composition comprising a herbicidally effective amount of herbicide A is applied.

7. The method of claim 1 , wherein the at least one herbicide resistant or tolerant weed species is Poa annua.

8. The method of claim 1 , wherein the at least one herbicide resistant or tolerant weed species is Digitaria insularis.

9. The method of claim 1 , wherein, relative to the sensitive standard, the resistant or tolerant weed species exhibits one or more of (i) a gene mutation coding for or overproducing an herbicide target-site enzyme limiting binding of the at least one herbicide, (ii) reduced uptake or translocation of the at least one herbicide, (iii) increased sequestration of the at least one herbicide, and (iv) enhanced metabolism of the at least one herbicide.

10. The method of claim 7 , wherein, relative to the sensitive standard, the resistant or tolerant weed species exhibits one or more of (i) a gene mutation coding for or overproducing an herbicide target-site enzyme limiting binding of the at least one herbicide, (ii) reduced uptake or translocation of the at least one herbicide, (iii) increased sequestration of the at least one herbicide, and (iv) enhanced metabolism of the at least one herbicide.

11. The method of claim 8 , wherein, relative to the sensitive standard, the resistant or tolerant weed species exhibits one or more of (i) a gene mutation coding for or overproducing an herbicide target-site enzyme limiting binding of the at least one herbicide, (ii) reduced uptake or translocation of the at least one herbicide, (iii) increased sequestration of the at least one herbicide, and (iv) enhanced metabolism of the at least one herbicide.

Assignees

• Basf Agro Bv

Inventors

• Kraus Helmut
• Sievernich Bernd
• Etcheverry Mariano
• Evans Richard R
• Nielson Ryan Louis
• Landes Andreas
• Zagar Cyrill
• Liebl Rex A

Classifications

• A01N2300/00

  Combinations or mixtures of active ingredients covered by classes A01N27/00 - A01N65/48 with other active or formulation relevant ingredients, e.g. specific carrier materials or surfactants, covered by classes A01N25/00 - A01N65/48 · CPC title

• A01N47/38

  containing the group >N—CO—N< where at least one nitrogen atom is part of a heterocyclic ring; Thio analogues thereof · CPC title

• A01N47/36

  containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof · CPC title

• A01N43/86

  six-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,3 · CPC title

• A01N43/80

  five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2 · CPC title