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US-12616200-B2 - Herbicidal combinations comprising diflufenican and mesotrione

US12616200B2US 12616200 B2US12616200 B2US 12616200B2US-12616200-B2

Abstract

The present disclosure primarily relates to certain agrochemically active herbicidal combinations comprising (A) diflufenican and (B) mesotrione. The disclosure further relates to the use of these combinations for controlling weeds, in particular for controlling resistant weeds, and to corresponding methods.

Inventors

  • Herve TOSSENS
  • John Hemminghaus
  • Alejandro Perez-Jones
  • Dawn PESTER

Assignees

  • BAYER AKTIENGESELLSCHAFT
  • MONSANTO TECHNOLOGY LLC

Dates

Publication Date
20260505
Application Date
20210902

Claims (12)

  1. 1 . A herbicidal combination, the combination comprising active herbicidal ingredients consisting of: (A) diflufenican; and (B) mesotrione; wherein a ratio by weight of a total amount of component (A) to a total amount of component (B) is in a range of from about 3:1 to about 1:3.
  2. 2 . The herbicidal combination according to claim 1 , wherein the ratio by weight of the total amount of component (A) to the total amount of component (B) is in a range of from about 2:1 to about 1:2.
  3. 3 . The herbicidal combination according to claim 1 , wherein the ratio by weight of the total amount of component (A) to the total amount of component (B) is in a range of from about 3:2 to about 2:3.
  4. 4 . The herbicidal combination according to claim 1 , wherein the ratio by weight of the total amount of component (A) to the total amount of component (B) is in a range of from about 3:2 to about 1:1.
  5. 5 . The herbicidal combination according to claim 1 , further comprising one or more further constituents selected from the group consisting of water, formulation adjuvants and safeners.
  6. 6 . The herbicidal combination according to claim 1 , wherein the herbicidal combination is a composition in a form of a concentrated formulation or a ready-to-use diluted spray application mixture.
  7. 7 . A method for controlling weed plants in crops of useful plants, characterized in that the herbicidal combination according to claim 1 is applied to the weed plants, crop plants, plant seeds, or to the area on which the weed plants are or will be growing.
  8. 8 . The method of claim 7 , further comprising applying the herbicidal combination to the weed plants, crop plants, plant seeds, or to the area on which the weed plants are or will be growing.
  9. 9 . The method according to claim 7 , characterized in that the crop plants are selected from the group consisting of corn, cotton and soybean, and wherein the crop plants preferably have been genetically modified.
  10. 10 . The method according to claim 7 , characterized in that the method or the use is carried out pre-emergence, early post-emergence or post-emergence.
  11. 11 . The method according to claim 7 , characterized in that the method or use is carried out for difficult to control weeds or plants, preferably for controlling weeds or plants having a resistance to herbicides of one, two, three, four, five or more different Modes of Action, wherein the resistances preferably are selected from the group consisting of auxin resistance, glyphosate resistance, acetolactate synthase (ALS) inhibitor resistance, 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitor resistance, CoA carboxylase (ACCase) inhibitor resistance, photosystem I (PS I) inhibitor resistance, photosystem II (PS II) inhibitor resistance, protoporphyrinogen oxidase (PPO) inhibitor resistance and synthesis of very long-chain fatty acid (VLCFA) inhibitor resistance.
  12. 12 . The method according to claim 7 , characterized in that: the diflufenican is used at an application rate of at least about 35 g/ha, preferably at an application rate of about 75 g/ha to about 200 g/ha; and/or the mesotrione is used at an application rate of at least about 50 g/ha, preferably at an application rate of about 50 g/ha to about 200 g/ha.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a U.S. national stage filing under 35 U.S.C. § 371 of International Application No. PCT/US2021/048938, filed on Sep. 2, 2021, which claims the benefit of, and priority to, U.S. Patent Application No. 63/076,534 filed Sep. 10, 2020. The entire disclosures of the above applications are incorporated herein by reference. FIELD The present disclosure primarily relates to certain agrochemically active herbicidal combinations comprising (A) diflufenican and (B) mesotrione. The disclosure further relates to the use of these combinations for controlling weeds, in particular for controlling resistant weeds, and to corresponding methods. BACKGROUND This section provides background information related to the present disclosure which is not necessarily prior art. The protection of crop plants (crops) from weed plants (weeds) and other unwanted vegetation which inhibit crop growth is a constantly recurring problem in agriculture. To help combat this problem, researchers in the field of synthetic chemistry have produced an extensive variety of active herbicidal ingredients (herbicides) and formulations effective in the control of such unwanted growth. Herbicides of many structural types and with different Modes of Action have been disclosed in the literature and a large number are in commercial use. Active herbicidal ingredients (herbicides) are typically categorized according to their Mode of Action (MoA) (or Site of Action (SoA)). The Mode of Action of herbicides is inter alia relevant concerning the weed spectrum that herbicides are able to control and in particular with respect to the ability to control unwanted plants (weeds) which are resistant (tolerant) or are evolving resistance (tolerance) to one or more Modes of Action. In normal use, the different classes of herbicides have proved to be very effective across a range of weeds. However, an increasing problem encountered in agriculture is the appearance of weeds that have developed a tolerance to classes of herbicides with certain Modes of Action. By ‘tolerance’ or “resistance” is meant that these weeds are less easily damaged or killed by the application of these herbicides than the normal phenotype. Typically, these weeds show little or no damage when these herbicides are applied at normal application rates. This tolerance arises naturally and occurs because of the selection pressure exerted on the weed population by repeated application of these herbicides. Some weeds have developed almost complete tolerance to herbicides of a certain Mode of Action, that is, they are virtually undamaged by these herbicides at the normal commercial application rates. Sometimes the word ‘resistant’ is also used to describe such weeds, in particular where they have the inherited ability to survive treatment by these herbicides. Herbicide resistance is obviously a problem, because either the weeds thrive to an increasing degree, which drive down crop yields, or alternatively increased quantities of herbicides must be used, which increases cost and risks environmental damage. The active ingredient diflufenican (IUPAC name: 2′,4′-difluoro-2-[3-(trifluoromethyl)phenoxy]pyridine-3-carboxanilide) is an active herbicidal ingredient (herbicide) known from U.S. Pat. No. 4,618,366 and is often abbreviated as DFF. Diflufenican controls unwanted weed plants pre-emergence and early post-emergence in certain crops; see, for example, “The Pesticide Manual”, 16th edition, The British Crop Protection Council and the Royal Soc. of Chemistry, 2012, p. 355-357. Diflufenican is an inhibitor of the phytoene desaturase (PDS), blocking carotenoid biosynthesis. The active ingredient mesotrione (IUPAC name: 2-[4-(methylsulfonyl)-2-nitrobenzoyl]cyclohexane-1,3-dione) is an active herbicidal ingredient (herbicide) known from U.S. Pat. Nos. 5,006,158, 5,506,195 and 5,912,207 and is often abbreviated as MST. Mesotrione controls unwanted weed plants in certain crops; see, for example, “The Pesticide Manual”, 16th edition, The British Crop Protection Council and the Royal Soc. of Chemistry, 2012, p. 728-729. Mesotrione is an inhibitor of the 4-hydroxyphenylpyruvate dioxygenase (HPPD). The active ingredient metribuzin (IUPAC name: 4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one) is an active herbicidal ingredient (herbicide) known from U.S. Pat. No. 3,905,801 and is often abbreviated as MRB. Metribuzin controls unwanted weed plants in certain crops; see, for example, “The Pesticide Manual”, 16th edition, The British Crop Protection Council and the Royal Soc. of Chemistry, 2012, p. 780-781. Metribuzin is an inhibitor of the Photosystem II (PSII). A variety of publications disclose herbicidal combinations involving the above-mentioned active herbicidal ingredients. For example, WO95/28839, WO02/21920 and WO02/100173 describe herbicidal combinations comprising mesotrione and herbicidally active triazines. WO03/005820 teaches a process