WO2023079575A1 - Composition herbicide comprenant de la sulfonylurée et de la triazine - Google Patents

Composition herbicide comprenant de la sulfonylurée et de la triazine Download PDF

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Publication number
WO2023079575A1
WO2023079575A1 PCT/IN2022/050964 IN2022050964W WO2023079575A1 WO 2023079575 A1 WO2023079575 A1 WO 2023079575A1 IN 2022050964 W IN2022050964 W IN 2022050964W WO 2023079575 A1 WO2023079575 A1 WO 2023079575A1
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present
herbicidal composition
sodium
range
atrazine
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PCT/IN2022/050964
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English (en)
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Aminul Islam
Balram BHAVANI
Kiran Pawar
Rajul EDOLIYA
Rajan Kumar TRIVEDI
Sanket PATIL
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Coromandel International Limited
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Publication of WO2023079575A1 publication Critical patent/WO2023079575A1/fr

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P13/00—Herbicides; Algicides
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
    • A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
    • A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
    • A01N47/36—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing the group >N—CO—N< directly attached to at least one heterocyclic ring; Thio analogues thereof

Definitions

  • the present invention relates to a herbicidal composition for protecting crops against weeds, undesired vegetation and grasses. More, particularly, the present invention relates to the herbicidal composition comprising a mixture of triazines, particularly metribuzin and atrazine and sulfonyl urea, particularly pyrazosulfuron ethyl. The present invention further relates to a method of controlling weeds comprising applying a composition of the present invention to the weeds or an area in need of weed control.
  • Unwanted plants such as weeds, reduce the number of resources available to crop plants and can have a negative effect on crop plant yield and quality.
  • the control of unwanted vegetation is a continually important effort as it is needed for reducing health problems, such as allergies, the removal of poisonous/noxious weeds, increasing crop productivity, as well as improving the general aesthetics around the home.
  • Unwanted vegetation can be controlled using herbicides that are either selective or non-selective. Non-selective herbicides kill or damage all plants to which they are applied, i.e., both desired and undesired vegetation. In contrast, selective herbicides eliminate or inhibit the growth of unwanted vegetation, while leaving the desired vegetation relatively unharmed.
  • Contact herbicides are applied to the top growth, or portion(s) of the plant located above the soil surface. These herbicides, which kill or damage the top-growth only, are typically effective on annual weeds or vegetation. In contrast, systemic herbicides are initially taken up by the roots and/or the foliage of the plant and subsequently translocated to tissues that are remotely located from the point of application.
  • the herbicidal effectiveness of a compound cannot be predicted from an examination of the substituent groups of the compound and often quite closely related compounds possess different weed control abilities.
  • Various herbicides of the same class of compounds may have complementary areas of activity and thus can be useful to control a variety of weeds upon application of a combination.
  • the various herbicides are not completely effective so as to control all the infesting weeds in a field crop, which necessitates the use of herbicidal combinations.
  • An ideal herbicide should afford selective weed control, over the full growing season, with a single administration. It should be able to control all common weeds by controlling their growth and reproduction as the seed, the germinating seed, the seedling and the growing weed plant. It is often imperative to use herbicidal combinations to achieve these advantages, although the selection of the components of an ideal combination is not a straightforward choice for a skilled artisan.
  • the present invention provides a herbicidal composition
  • a herbicidal composition comprising a a mixture of triazines, particularly metribuzin and atrazine and sulfonyl urea, particularly pyrazosulfuron ethyl.
  • metribuzin is present in a range from 10% (w/w) to 25% (w/w); and atrazine is present in a range from 30% (w/w) to 50% (w/w) and pyrazosulfuron ethyl is present in a range from 0.30% (w/w) to 1.2% (w/w).
  • the adjuvants are selected from a wetting agent, a dispersing agent, a rheology modifier, a buffer and a filler.
  • the wetting agent is selected from the group comprising dialkyl naphthalene sulphonate sodium salt, alkylnaphthalene sulfonate condensate blend, sodium ligno sulphonate, linear alcohol derivative and polyethylene glycol nonyl phenyl ether ammonium sulfate, present in a range from 4% to 5% w/w.
  • the dispersing agent is selected from the group comprising Sodium salt of polyalkyl naphthalene sulfonate, sodium ligno sulphonate, acrylate copolymer, phenol sulfonic acid-formaldehyde- polycondensation as sodium salt, sodium polycarboxylate, sodium methyl oleoyl taurate and sodium lauryl sulphate or combination thereof, present in a range from 4% to 5.5% w/w.
  • the rheology modifier is silicon dioxide, present in a range from 1.5% to 2.5% w/w.
  • the buffer is selected from the group comprising oxalic acid, Citric acid, orthophosphoric acid, and disodium hydrogen orthophosphate, present in a range from 0.20% to 0.22% w/w.
  • the filler is selected from the group comprising corn starch, lactose monohydrate, quartz, talc, kaolin, pyrophyllite, montmorillonite, attapulgite, bentonite clay, china clay, kieselguhr, chalk, zeolite, calcite, sericite, acid clay, diatomaceous earth, natural rock, Fuller’s earth, meerschaum, gibbsite, dolomite or pumice; synthetic minerals such as precipitated silica, fumed silica, sodium silicate, silicon dioxide, alumina, aluminium silicate, and aluminium hydroxide, present in an amount of 14% to 43% w/w.
  • the composition is formulated as wettable powder.
  • active ingredient refers to that component of the composition responsible for control of weeds, undesired vegetation and grasses.
  • % refers to % weight; and % weight refers to % of the weight of the respective component with respect to the total weight of the composition.
  • the term "effective amount” means the amount of the active substances in the compositions to achieve an observable effect on growth, including the effects of necrosis, death, retardation, prevention, and removal, destruction, or otherwise diminishing the occurrence and activity of the target weed.
  • the effective amount can vary for the various compositions used in the present invention.
  • An effective amount of the compositions will also vary according to the prevailing conditions such as desired herbicidal effect and duration, weather, target species, locus, mode of application, and the like.
  • plants, weeds and vegetation include germinant seeds, emerging seedlings, plants emerging from vegetative propagules and established vegetation.
  • the present invention aims provide a herbicidal combination, which allows efficient and reliable control of grass and broadleaf weeds. Moreover, the persistence of the herbicidal activity of the combination should be sufficiently long in order to achieve control of the weeds over a sufficient long time period thus allowing a more flexible application.
  • the combination should also have a low toxicity to humans or other mammals.
  • the combinations should also show an accelerated action on harmful plants, i.e., they should effect damaging of the harmful plants more quickly in comparison with application of the individual herbicides.
  • Metribuzin chemically known as 4-amino-6-tert-butyl-3-methylsulfanyl- l,2,4-triazin-5-one has chemical structure as below.
  • Metribuzin is a triazinone herbicide that inhibits photosynthesis in a susceptible plant by binding to a protein of the photosystem II complex, which in turn, cause a chain of events where, eventually, plant lipids and proteins are attacked and oxidized by highly reactive free radicals. As a result, chlorophyll and plant pigments are lost causing chlorosis followed by plant cell drying and disintegration.
  • metribuzin When applied to soil, metribuzin is readily absorbed by roots, after which translocation upward to the shoots and beyond occurs through the xylem. Once susceptible plants emerge through treated soil into the sunlight, they become yellow/chlorotic, then totally brown after 2 to 5 days. Microbial breakdown is the main means of metnbuzin degradation in the soil. Soil absorption decreases as pH increases, which makes the herbicide more available for degradation. Metribuzin half-life in soils under optimum degradation conditions can be 14 to 28 days.
  • Atrazine IUPAC name is 6-Chloro-N2-ethyl-N4-(propan-2-yl)-l,3,5- triazine-2,4-diamine is a widely used herbicide that can be applied before and after planting to control broadleaf and grassy weeds.
  • Atrazine is a member of the triazine chemical class, which includes simazine and propazine. Atrazine is represented by the following structure.
  • Atrazine interferes with photosynthesis in some broadleaf plants and grasses. It is taken up by roots and leaves and moves upward in the plant to areas of new growth. The plant dries out and dies. Older leaves on plants may be affected more than new leaves. Root growth is not affected by atrazine. Atrazine is broken down slowly by water, sunlight, and microorganisms. Atrazine has a half-life of 168 days in water exposed to sunlight. Atrazine has a low to moderate solubility in water. Atrazine does not bind well to soil and can easily move in it.
  • Pyrazosulfuron ethyl chemically known as (ethyl5-(4,6- dimethoxypyrimidin-2-ylcarbamoylsulfamoyl)-l-methylpyrazole- 4-carboxylate) is a post-emergence sulfonylurea herbicide for the control of annual and perennial grasses and broad-leaved weeds in rice production.
  • the molecular structure of pyrazosulfuron ethyl is presented as
  • Pyrazosulfuron ethyl shows outstanding efficacy against broad spectrum of annual and perennial broad leaf weeds and sedges with pre-emergence and post emergence applications at low use rates with an ample margin of crop safety for major rice varieties.
  • the herbicide pyrazosulfuron ethyl has both foliar and soil activity. It is generally recommended as a pre-emergence herbicide in trans-planted rice.
  • the herbicidal composition in addition to herbicidal actives further contains a support, an adjuvant and/or a surfactant.
  • a common adjuvant can be mixed with the composition.
  • the active compounds within the herbicidal composition according to the invention have potent weedicide activity and can be employed for controlling undesired weeds, vegetation and sedges.
  • the present invention provides a herbicidal combination comprising at least two triazine herbicides in combination with a third herbicide.
  • the present invention may provide a combination comprising metribuzin, atrazine and at least a third herbicide.
  • the present invention provides a method of controlling weeds at a locus by treating the locus with a combination comprising metribuzin, atrazine and at least a third herbicide pyrazosulfuron ethyl.
  • the present invention composition may contain an additional herbicide, fungicides, antibiotics, plant hormones, insecticides, fertilizers, phytotoxicity-reducing agents, etc., in addition to actives metribuzin, atrazine and pyrazosulfuron ethyl.
  • the present invention provides a herbicidal composition comprising metribuzin, atrazine and pyrazosulfuron ethyl in effective amounts and adjuvants.
  • the herbicidal composition comprises of metribuzin in a range from 10% (w/w) to 25% (w/w), atrazine in a range from 30% (w/w) to 50% (w/w), pyrazosulfuron ethyl in a range from 0.30% (w/w) to 1.2% (w/w), and adjuvants
  • Suitable adjuvants may be a solid or liquid and are generally a substance commonly used in formulation processing process, for example, wetting agents, dispersing agents, rheology modifier, buffer and filler.
  • the novel herbicidal composition of the present invention may be formulated as Granular composition (GR), Capsule suspension (CS), Dispersible concentrate (DC), Dustable powder (DP), Powder for dry seed treatment (DS), Emulsifiable concentrate (EC), Emulsifiable granule (EG), Emulsion water-in-oil (EO), Emulsifiable powder (EP), Emulsion for seed treatment (ES), Emulsion oil- in-water (EW), Flowable concentrate for seed treatment (FS), Granules (GR), Micro-emulsion (ME), Oil-dispersion (OD), Oil miscible flowable concentrate (OF), Oil miscible liquid (OL), Oil dispersible powder (OP), Suspension concentrate (SC), Suspension concentrate for direct application (SD), Suspo- emulsion (SE), Water soluble granule (SG), Soluble concentrate (SL), Spreading oil (SO), Water soluble powder (SP), Water soluble tablet (ST), Ultra-low volume (ULV)
  • wetting is the first stage of dispersion, in which air surrounding the granular composition is substituted with water. Wetting of the composition with water cannot occur if the surface tension of the liquid is very high. Hence, it is recommended to add a wetting agent to the composition to facilitate the process of dispersion of the granules in the liquid.
  • the wetting agent is selected from the group comprising of naphthalene alkyl aryl sulphonate, dioctyl sulfosuccinate, sodium lauryl sulfate, non-ionic ethoxylated polyarylphenol phosphate ester, sodium alkyl naphthalene sulfonate or a combination thereof.
  • the wetting agent suitable for use in the present invention are dialkyl naphthalene sulphonate sodium salt, alkylnaphthalene sulfonate condensate blend, sodium ligno sulphonate, linear alcohol derivative and polyethylene glycol nonyl phenyl ether, ammonium sulfate, present in a range from 4% to 5% w/w.
  • the composition of the present invention contains dispersing agents such as amine salt of phosphate tristyryl phenol ethoxylated, acrylic copolymer, naphthalene sulphonates of formaldehyde condensate, lignin based sulphonate.
  • dispersing agents such as amine salt of phosphate tristyryl phenol ethoxylated, acrylic copolymer, naphthalene sulphonates of formaldehyde condensate, lignin based sulphonate.
  • One or more dispersing agents may be used in the synergistic composition of the present invention.
  • the dispersing agent suitable for use in the present invention are Sodium salt of poly alkyl naphthalene sulfonate, sodium ligno sulphonate, acrylate copolymer, phenol sulfonic acid-formaldehyde-polycondensation as sodium salt, sodium polycarboxylate, sodium methyl oleoyl taurate and sodium lauryl sulphate or combination thereof, present in a range from 4% to 5.5% w/w.
  • Rheology modifiers are sometimes referred to as thickeners or viscosity modifiers, but they do much more than just thicken a formulation.
  • a good rheology modifier structures the formulation but when a force is applied it becomes flowable and easily poured.
  • Flowable formulations require a rheology modifier to prevent sedimentation phenomena.
  • Rheology modifiers produce a “three-dimensional” gel network in the continuous phase resulting in a non-Newtonian fluid, which provides stability to the formulation.
  • the rheology modifier must give high viscosity, so the product does not separate during long-term storage but still allow the product to be easily poured from the package.
  • the suitable rheology modifier of the present invention is silicon dioxide.
  • Rheology modifiers are suitably present in the range of 1.5% to 2.5% (w./w.).
  • Buffering agent or buffer is classified as a utility modifier that widens the range of conditions under which a given herbicide formulation is useful.
  • a buffering agent increases the dispersion and/or solubility of an herbicide under conditions of extreme acidic or alkaline waters.
  • the suitable buffering agents of the present invention are selected from oxalic acid, Citric acid, orthophosphoric acid, and disodium hydrogen orthophosphate.
  • buffer is suitably present in a range of 0.20% to 0.22% (w./w.)
  • the term “filler” refers to solid chemicals that are added to a herbicide formulation to aid in the delivery of the active ingredient.
  • Filler is selected from the group comprising of, but not limited to, natural minerals such as corn starch, lactose monohydrate, quartz, talc, kaolin, pyrophyllite, montmorillonite, attapulgite, bentonite clay, china clay, kieselguhr, chalk, zeolite, calcite, sericite, acid clay, diatomaceous earth, natural rock, Fuller’s earth, meerschaum, gibbsite, dolomite or pumice; synthetic minerals such as precipitated silica, fumed silica, sodium silicate, alumina, aluminium silicate, aluminium hydroxide; inorganic salts such as calcium carbonate, ammonium sulfate or other ammonium salts, sodium sulfate, potassium chloride.
  • the filler may be used alone or in combination thereof.
  • the filler may be used alone
  • the present invention provides a method of selectively controlling the broadleaf weeds and grass infestation at a locus, said composition comprising herbicidally effective amount of a combination comprising metribuzin, atrazine and pyrazosulfuron ethyl.
  • Broad leaf weed being selected from chickweed, dandelion, florida betony, japenese clover, plantain, common vetch, Echinochloa Beauvois, Cyperus difformis, Cyperus rotundus (sedge), Cynodon dactylon, Digitaria sanguinalis, Dinebra retroflexa, Eleusine indica, Panicum spp., Dactyloctenium aegyptium (among grasses) Chenopodium album, Trianthema portulacastrum, Trianthema monogyna, convolvulus arvensis, Amaranthus viridis, A blitum, Digera arvensis, Portulaca oleracea, Lactuca runcinata, Euphorbia hirta, Euphorbia geniculata, Eclipta alba, Commelina benghalensis, Digera arvensis, Phyllanthus niruri and
  • the herbicide compositions of the present invention can be applied to a variety of undesired vegetation in both residential and commercial plant or crop areas.
  • the herbicide compositions are effective to selectively control broadleaf weeds growing in grass and turf areas.
  • the herbicidal compositions disclosed herein are very effective against numerous common broadleaf weeds, mosses, liverworts, and algae. Grass and turf areas that are infested with undesired vegetation can be entirely sprayed with a herbicidal composition of the present invention to selectively remove the unwanted vegetation, while leaving the grass, turf and other desired plants undamaged.
  • compositions can be applied to the undesirable vegetation and/or weeds or their locus by the use of conventional ground or aerial dusters, sprayers, and granule applicators, by addition to irrigation or paddy water, and by other conventional means known to those skilled in the art.
  • Example 1 Process of preparation of composition of Metribuzin, Atrazine and Pyrazosulfuron ethyl in Wettable Powder form.
  • composition of Metribuzin, Atrazine, and Pyrazosulfuron ethyl, in wettable powder form is prepared by following steps as below:
  • Step 1 Weighing the raw materials according to the batch size as follows: a. filler b. wetting agent c. dispersing agent d. rheology modifier e. Metnbuzin f. Pyrazosulfuron ethyl g. Atrazine, h. optionally buffer. weighing all this raw material in a pre -blender and mixing it for 1 hr.
  • Step 2 Milling the sample through air jet mill instrument at inlet pressure 2-3 kg/cm 2 , grinding pressure 6 kg/ cm 2 and checking for the particle size ⁇ 15 micron.
  • Step 3 Collecting the Milled material, and post blending the sample for Bit.
  • Step 4 Sending the sample to the Quality analysis.
  • Step 5 Pack the formulated material in a suitable packaging.
  • Example 2 Compositions of the present invention
  • the illustrative embodiments show the composition of Metribuzin, Atrazine, and Pyrazosulfuron ethyl in wettable powder form in different amount as follows:
  • Process for manufacture of composition of Table 1 is as follows: 25.0 gm of metribuzin, 1.17 gm of pyrazosulfuron ethyl, 50.0 gm of atrazine, 4.0 gm of Alkylnaphthalene sulfonate condensate blend, 2.0 gm of phenol sulfonic acid- formaldehyde, 2.0 gm of sodium poly alkylnaphthalene sulphonate, 1.5 gm of silicon dioxide, and 14.33 gm of china clay were weighed in the pre-blender reactor and mixed for 1 hour.
  • the mixture was milled through air jet mill instrument (Inlet pressure 2-3 kg/cm 2 , grinding pressure 6 kg/ cm 2 ) to obtain the desired particle size (D90 ⁇ 15 microns). Collecting the milled material and post blending the material for 1 hour followed by packing the material in a suitable package.
  • Process for manufacture of composition of Table 2 is as follows: 20.0 gm of metribuzin, 0.35 gm of pyrazosulfuron ethyl, 30.0 gm of atrazine, 5.0 gm of Alkylnaphthalene sulfonate condensate blend, 3.0 gm of phenol sulfonic acid- formaldehyde polycondensation as sodium salt, 1.0 gm of Acrylate copolymer, 2.0 gm of silicon dioxide, 0.20 gm of oxalic acid and 38.45 gm of china clay were weighed in the pre-blender reactor and mixed for 1 hour.
  • the mixture was milled through air jet mill instrument (Inlet pressure 2-3 kg/cm 2 , grinding pressure 6 kg/ cm 2 ) to obtain the desired particle size (D90 ⁇ 15 microns). Collecting the milled material and post blending the material for 1 hour followed by packing the material in a suitable package.
  • Process for manufacture of composition of Table 3 is as follows: 10.0 gm of metribuzin, 0.50 gm of pyrazosulfuron ethyl, 35.0 gm of atrazine, 4.5 gm of Dialkyl naphthalene sulphonate sodium salt, 2.5 gm of Sodium salt of methyl naphthalene sulfonate, 2.5 gm of phenol sulfonic acid-formaldehyde- polycondensation as sodium salt, 1.8 gm of silicon dioxide, 0.22 gm of oxalic acid and 42.98 gm of china clay were weighed in the pre-blender reactor and mixed for 1 hour.
  • the mixture was milled through air jet mill instrument (Inlet pressure 2-3 kg/cm 2 , grinding pressure 6 kg/ cm 2 ) to obtain the desired particle size (D90 ⁇ 15 microns). Collecting the milled material and post blending the material for 1 hour followed by packing the material in a suitable package.
  • Process for manufacture of composition of Table 4 is as follows: 15.0 gm of metribuzin, 0.9 gm of pyrazosulfuron ethyl, 40.0 gm of atrazine, 4.5 gm of Linear Alcohol Derivative, 2.5 gm of Sodium polycarboxylate, 3.0 gm of Sodium Methyl Oleoyl Taurate, 2.5 gm of silicon dioxide, 0.20 gm of oxalic acid and 31.40 gm of china clay were weighed in the pre-blender reactor and mixed for 1 hour.
  • the mixture was milled through air jet mill instrument (Inlet pressure 2-3 kg/cm 2 , grinding pressure 6 kg/ cm 2 ) to obtain the desired particle size (D90 ⁇ 15 microns). Collecting the milled material and post blending the material for 1 hour followed by packing the material in a suitable package.
  • Process for manufacture of composition of Table 5 is as follows: 20.0 gm of metribuzin, 1.1 gm of pyrazosulfuron ethyl, 45.0 gm of atrazine, 5.0 gm of Polyethylene glycol Nonyl phenyl ether ammonium sulfate, 3.0 gm of Sodium Ligno sulphonate, 1.0 gm of Sodium lauryl sulphate, 2.5 gm of silicon dioxide, 0.21 gm of oxalic acid and 22.19 gm of china clay were weighed in the pre-blender reactor and mixed for 1 hour.
  • the mixture was milled through air jet mill instrument (Inlet pressure 2-3 kg/cm 2 , grinding pressure 6 kg/ cm 2 ) to obtain the desired particle size (D90 ⁇ 15 microns). Collecting the milled material and post blending the material for 1 hour followed by packing the material in a suitable package.
  • Metribuzin, Atrazine & Pyrazosulfuron ethyl belongs to chemical family “Triazinones” with mode of action of inhibition of photosynthesis at PSII synthesis (PSII) inhibitors and Pyrazosulfuron ethyl belongs to chemical family “Sulfonylureas” with Acetolactate synthase (ALS inhibitor) mode of action.
  • PSII PSII synthesis
  • Pyrazosulfuron ethyl belongs to chemical family “Sulfonylureas” with Acetolactate synthase (ALS inhibitor) mode of action.
  • This combination helps in controlling the cross- spectrum weeds (broad leaf weeds, grassy weeds, and sedges) in sugarcane when applied in post-emergence application timing at 2-4 weed leaf stage. All the molecules are safe to sugarcane.
  • weed control activity of the individual herbicides of the invention and their combinations were evaluated on weeds such as Cyperus rotund s, Parthenium hysterophorus, Dactyloctenium aegyptium, Echinochloa colona and Dinebra retroflexa.
  • weeds such as Cyperus rotund s, Parthenium hysterophorus, Dactyloctenium aegyptium, Echinochloa colona and Dinebra retroflexa.
  • Trials were conducted with randomized block design with net plot size of 5m x 6m. Each trial was replicated four times and conducted under GEP guidelines. Spraying was done with manual operated backpack knapsack sprayer with 300 L of water spray volume per hectare at post-emergence (2-4 weed leaf stage) application timing. Such field trials were carried out at various locations to generate independent data, the locations were chosen randomly across India.
  • B observed efficacy of active ingredient B at the same concentration as used in the mixture.
  • C observed efficacy of active ingredient C at the same concentration as used in the mixture.
  • Table 6 demonstrates synergy on weeds using the combination of Metribuzin 25% + Pyrazosulfuron ethyl 1.17% + Atrazine 50% WP.
  • the field trials were carried out in India at various locations. The percentage efficacy was calculated after 30 days of application.
  • the target weeds were Cyperus rotundus, Parthenium hysterophorus and Amaranthus viridis and the results are recorded in the table 6 below.
  • WP Wettable Powder
  • GAH gram active per hectare.
  • Table 7 demonstrates synergy on weeds using the combination of Metribuzin 25% + Pyrazosulfuron ethyl 1.17% + Atrazine 50% WP.
  • the field trials were carried out in India at various locations. The percentage efficacy was calculated after 30 days of application.
  • the target weeds were Dinebra retroflexa ,Dactyloctenium aegyptium, and Echinochloa colona and the results are recorded in the table 7 below.
  • the combinations of the present invention have several advantages over solo application of these herbicides.
  • the combination of the present invention shows enhanced herbicide action in comparison with the herbicide action of solo action of pyrazosulfuron ethyl, metribuzin and atrazine against undesirable vegetation.
  • the combinations are generally non-toxic or of low toxicity against mammals and reduce environmental load.

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Abstract

La présente invention concerne une nouvelle composition herbicide pour protéger des cultures contre les mauvaises herbes, la végétation indésirable et les graminées. Plus particulièrement, la présente invention concerne une composition herbicide comprenant des triazines, en particulier un mélange de métribuzine et d'atrazine et de sulfonylurée, en particulier de pyrazosulfuron-éthyle. La présente invention concerne en outre un procédé de lutte contre les mauvaises herbes comprenant l'application d'une composition de la présente invention sur les mauvaises herbes ou sur une zone nécessitant une lutte contre les mauvaises herbes.
PCT/IN2022/050964 2021-11-03 2022-11-02 Composition herbicide comprenant de la sulfonylurée et de la triazine WO2023079575A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024134474A1 (fr) * 2022-12-20 2024-06-27 Upl Limited Composition agrochimique stable

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103053575A (zh) * 2011-10-18 2013-04-24 孙雪梅 烟嘧磺隆和莠去津混合除草剂
WO2017140650A1 (fr) * 2016-02-16 2017-08-24 Upl Europe Ltd Combinaison herbicide

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103053575A (zh) * 2011-10-18 2013-04-24 孙雪梅 烟嘧磺隆和莠去津混合除草剂
WO2017140650A1 (fr) * 2016-02-16 2017-08-24 Upl Europe Ltd Combinaison herbicide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024134474A1 (fr) * 2022-12-20 2024-06-27 Upl Limited Composition agrochimique stable

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