WO2021212171A1 - Procédé de préparation d'une composition de glyphosate - Google Patents

Procédé de préparation d'une composition de glyphosate Download PDF

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Publication number
WO2021212171A1
WO2021212171A1 PCT/AU2021/050354 AU2021050354W WO2021212171A1 WO 2021212171 A1 WO2021212171 A1 WO 2021212171A1 AU 2021050354 W AU2021050354 W AU 2021050354W WO 2021212171 A1 WO2021212171 A1 WO 2021212171A1
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WIPO (PCT)
Prior art keywords
spray
water
glyphosate
previous
ammonium sulfate
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PCT/AU2021/050354
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English (en)
Inventor
Philip Patterson
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4 Farmers Australia Pty Ltd
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Publication date
Priority claimed from AU2020901288A external-priority patent/AU2020901288A0/en
Application filed by 4 Farmers Australia Pty Ltd filed Critical 4 Farmers Australia Pty Ltd
Priority to CA3176471A priority Critical patent/CA3176471A1/fr
Priority to AU2021261046A priority patent/AU2021261046A1/en
Publication of WO2021212171A1 publication Critical patent/WO2021212171A1/fr
Priority to ZA2022/11454A priority patent/ZA202211454B/en

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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
    • A01N57/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds
    • A01N57/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-carbon bonds
    • A01N57/20—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-carbon bonds containing acyclic or cycloaliphatic radicals
    • 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
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/22—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing ingredients stabilising the active ingredients
    • 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
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/30—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests characterised by the surfactants

Definitions

  • This invention relates to a method of preparing aqueous glyphosate compositions in a spray tank from relatively water insoluble glyphosate acid powder and to a method of controlling weeds by application of the aqueous glyphosate composition.
  • Glyphosate in the form of its salts is the most common form of glyphosate that is used as an active agent in agriculture and industrial herbicidal liquid formulations (soluble liquids) or solid formulations (soluble powders or water dispersible granules). Glyphosate salts have been preferred because of glyphosate acid's relative lack of solubility in water. Thus, glyphosate salts have been chosen as the form to use in the vast majority of herbicidal applications because they can be readily dissolved in water by farmers in a spray tank shortly before spray application to plants to be controlled.
  • the glyphosate salt compositions are generally sold in liquid formulations composed of glyphosate in a salt form and suitable adjuvants, such as surfactant, which may enhance the absorption of the active agent in the plants to be controlled.
  • the content of the active salt is generally expressed in terms of the glyphosate acid equivalent, that is, the equivalent acid content. This allows the activity of different salt compositions to be compared based on the glyphosate component.
  • Typical loadings of commercial salt solution concentrates contain from 20 to 600 g/L glyphosate acid equivalent.
  • the salt forms commonly contain glyphosate with amines or other cations.
  • the amines and cations include isopropylamine, monoethanolamine and potassium in in the case of liquid formulations (soluble liquids).
  • Glyphosate is also sold in the form of water dispersible granule (WDG) formulations which contain the water-soluble glyphosate salt and adjuvants such as solid carriers and wetters which allow the granule and water-soluble salts to be rapidly dissolved in a spray tank by the farmer.
  • WDG water dispersible granule
  • the farmer will generally mix the aqueous concentrate or WDG with water in a tank shortly before spray application to the weeds or the area of land on which weeds are to be controlled.
  • Glyphosate acid has poor water solubility which produces fine precipitates in water, particularly at low temperature or in hard water which can lead to blocking of spray nozzles with the risk of ineffective weed control from under dosing of weeds. While in pure water glyphosate has a solubility of about 12 g/L at 20 Q C the solubility is significantly reduced at lower temperature and/or in even moderately hard water commonly available in farming districts.
  • glyphosate is normally formulated in the form of a water-soluble salt
  • the herbicide is converted to the acid form in the plant to provide herbicidal activity.
  • Amine salts are generally water-soluble but often have an unpleasant odour.
  • some amines used in forming salts have a low flash point and present significant process hazards for storage of these amines and preparation of the salts.
  • AU 2010330690 teaches the inclusion of glyphosate acid with an agriculturally acceptable glyphosate salt in a solid glyphosate formulation such as a granule.
  • the glyphosate acid and the glyphosate salt are in admixture and the mole ratio of glyphosate acid to total glyphosate moieties is at least 10% and less than 50%.
  • AU 2007260586 teaches a method of preparing a spray tank mix of glyphosate which involves forming a dilute mixture of a first pack containing a mixture of an alkaline composition together with a surfactant, particularly ethanolamine which is added first to the spray tank and a second pack of glyphosate acid, subsequently added to the spray tank to form a glyphosate salt in situ.
  • a surfactant particularly ethanolamine which is added first to the spray tank and a second pack of glyphosate acid
  • tank mixes of (i) glyphosate acid from glyphosate acid in powder form and (ii) other pesticides such as one or more herbicides, insecticides and fungicides so that the tank mix provides a broader spectrum of pest control.
  • glyphosate acid spray solution may be prepared in the spray tank by combining glyphosate acid powder and ammonium sulfate in the spray-water.
  • a method of preparing a glyphosate solution in a spray tank comprising: adding ammonium sulfate to spray-water in the spray tank; adding glyphosate acid powder to spray-water in the spray tank containing the ammonium sulfate; adding a wetter surfactant to spray-water in the spray tank.
  • the glyphosate powder is added to the spray tank following addition of at least a portion of the ammonium sulfate. Addition of the glyphosate powder following the ammonium sulfate addition provides significant advantages in enhancing the dissolution of glyphosate acid and reducing the occurrence of solid precipitates and crystallisation.
  • the method comprises a first step of partially filling the spray tank with spray-water, and a subsequent step of filling the partially filled spray tank with spray-water to make up the required spray-water volume following the addition of ammonium sulfate, glyphosate acid, wetter, and any further herbicide or adjuvant.
  • the method comprises: adding an initial amount of water to the spray tank; adding ammonium sulfate to the spray tank, optionally in an aqueous mixture; adding an aqueous slurry of glyphosate powder to the spray tank following addition of at least a portion of the ammonium sulfate, preferably all the ammonium sulfate; adding a wetter to the spray tank; optionally adding further water to make up the desired spray volume following addition of the ammonium sulfate glyphosate acid slurry and wetter; and optionally adding a further pesticide during the method.
  • the wetter surfactant is added to the spray-water following addition of at least a portion of the glyphosate acid and preferably following addition of the glyphosate acid.
  • the invention involves a method of formulating an aqueous composition of glyphosate acid in a spray tank using ammonium sulfate.
  • the ammonium sulfate is typically added to water in the spray tank and may be added in finely divided form such as a powder, granules or as an aqueous mixture.
  • the ammonium sulfate may be pre-dissolved in the water or may be in the form of a slurry in which the ammonium sulfate may be partly dissolved. It is typically convenient to use ammonium sulfate in the form of a powder or granules which are forms readily available for suppliers for a range of agrochemical uses.
  • the ammonium sulfate may be formed into a solution or slurry prior to addition to the spray-water or if desired may be added to the spray- water in the form of powder or granules to form the solution of ammonium sulfate.
  • the ammonium sulfate in one embodiment is in crystalline form for example as a powder or granules containing crystalline ammonium sulfate.
  • the invention provides an efficient method for the on-farm formulation of aqueous glyphosate acid solution in spray-water.
  • the method involves the addition to spray-water of powdered glyphosate acid technical material and low-cost, safe and commonly available agricultural adjuvants can be individually purchased by the farmer.
  • these adjuvants include agricultural ammonium sulfate and agricultural non-ionic wetters.
  • ammonium sulfate to the spray-water prior to powdered glyphosate acid provides an unexpected level of stability under conditions of hard water and low temperatures which allowing farmers the flexibility to formulate aqueous glyphosate acid composition directly from powdered glyphosate available from manufacturers without the additional costs associated with pre-formulated proprietary glyphosate compositions.
  • aqueous solution compositions prepared according to the invention show enhanced efficacy (per unit weight (wt) of glyphosate acid equivalent) against important weeds such as ryegrass, capeweed, melons and provide enhanced early brown-out.
  • the composition of the ammonium sulfate may comprise at least 70wt% ammonium sulfate, preferably at least 80 wt% ammonium sulfate, more preferably at least 90wt% ammonium sulfate, such as at least 95 wt% ammonium sulfate.
  • other materials may, for example be inert fillers, granulation agents or other materials used in granulation or preserving reducing caking of ammonium sulfate.
  • ammonium sulfate acts as a week acid. It was surprising to find that the use of ammonium sulfate in place of an alkaline material would provide a spray solution containing a solutions of the ammonium sulfate and glyphosate having an acid pH of, for example 2 to 3.5 such as 2.5 to 3.
  • the low pH of 2 to 3.5 such as 2.5 to 3 of the final glyphosate solution allows alkaline materials to be completely omitted and the glyphosate to remain in free acid form from addition to the spray water to the final glyphosate acid solution.
  • the glyphosate acid is generally in powder form and typically is of particle size of maximum dimensions of no more than 1 mm preferably no more than 0.5 mm such as 0.01 to 0.5 mm.
  • the glyphosate powder will typically contain glyphosate acid and optionally an inert carrier although powders of technical grade glyphosate acid are preferred due to their economical pricing.
  • glyphosate acid herein is the glyphosate free acid and will be understood to be clearly distinguished from glyphosate salts used in solutions or granules of prior art solid and liquid compositions of glyphosate.
  • the glyphosate acid powder is typically free of alkali and is relatively insoluble in typical spray-water.
  • the glyphosate acid powder will typically contain at least 90 % by weight glyphosate acid on the dry weight of the powder such as at least 95% by weight.
  • Technical grade glyphosate acid available from manufacturers is typically about 95 wt% to 97 wt% purity.
  • the glyphosate acid powder is added to the spray tank as a slurry of the powder.
  • the slurry of powder may be prepared by turbulent mixing in an induction hopper which may also be referred to in the art as an induction vessel for transfer of chemicals to the sprayer.
  • An induction hopper may be used which provides mixing of the glyphosate acid powder with water in a swirling flow such as a vortex action. It is particularly preferred that at least the glyphosate acid powder is added via formation of a slurry of the powder in an induction hopper. In a further embodiment the ammonium sulfate and glyphosate acid powder are each added via the chemical induction hopper either simultaneously or preferable the ammonium sulfate is added at least in part prior to addition of the glyphosate acid powder. Induction hoppers known in the art are a smaller tank than the spray tank providing a swirling flow such as a vortex of water within the induction hopper for mixing water with the concentrated material.
  • the glyphosate acid and optionally one or both ammonium sulfate and wetter are added to the spray tank after mixing with water in an induction hopper.
  • the induction hopper is adapted to deliver the aqueous mixtures formed in the hopper into the spray tank. It may be placed above the spray tank or may be adapted to transfer the contents of the hopper to the spray tank via a transfer conduit.
  • Suitable induction hoppers for providing swirl (e.g. vortex) mixing are available from Hardi Industries under the trade mark “Granni Pot” or from Gold Acres of St Arnaud, Victoria, Australia.
  • the preparation and spraying of the glyphosate composition in accordance with the invention is conducted using spray apparatus comprising a chemical induction hopper adapted to deliver chemicals mixed with water to a spray tank and one or more boom spray arms comprising spray nozzles, the spray tank being adapted to deliver an aqueous composition in the spray tank to the spray nozzles.
  • the aqueous composition in the spray tank is continuously agitated in the time period during addition of the ammonium sulfate, glyphosate acid powder, wetter and any other materials and preferably through addition of the water used to make up the final volume of the spray mixture.
  • the final spray mixture volume in the spray tank may in one set of embodiments be from 1000 L to 15,000L, preferably about 5,000L.
  • the invention further comprises spray application of the glyphosate composition from the spray tank to an area of land in which growth of undesirable plants is to be controlled.
  • the rate at which the spray-water is applied to an area of land in which weeds are to be controlled will depend on the concentration of the glyphosate, the presence of any other herbicides and the chosen wetter surfactant.
  • the spray-water may be applied to an area at a rate of at least 20 L/ha, preferably at least 30 L/ha, more preferably at least 40 L/ha such as at least 50 L/ha, at least 60 L/ha or at least 70 L/ha.
  • the spray-water may be applied to an area at a rate of no more than 400L/ha, preferably no more than 300 L/ha such as no more than 200 L/ha or no more than 100 L/ha.
  • the rate of application of spray-water onto an area of land on which plants are to be controlled by the herbicidal composition is preferably 30 L/ha to 200 L/ha, more preferably 40 L/ha to 100 L/ha, preferably about 60 L/ha to 80 L/ha.
  • the quantity of ammonium sulfate added to the spray tank is 0.3 kg/100L to 5 kg/100L, preferably 0.5 kg/100L to 5 kg/100L of spray-water, preferably 1 kg/100L to 3 kg/100L of spray-water, more preferably about 2kg/100L of spray-water.
  • an amount of ammonium sulfate in this range is added to the spray water prior to addition of the glyphosate acid powder.
  • the quantity of glyphosate acid powder added to the spray-water is preferably from 1 g/L to 20 g/L spray-water, preferably about 5g/L spray-water (based on final spray-water volume).
  • the concentration of ammonium sulfate in the final spray-water composition is typically at least 0.3 wt% such as at least 0.5 wt%, at least 1 wt%, at least 1.5 wt% or at least 2 wt%.
  • the amount of ammonium sulfate in the final spray-water composition is no more than 6 wt%, preferably no more than 5 wt%, such as no more than 4 wt%, no more than 3 wt% or no more than 2 wt%
  • the concentration of glyphosate in the final spray-water volume is preferably 0.3 wt% to 3 wt% of the spray-water composition.
  • addition to the spray water of ammonium sulfate prior to addition of glyphosate acid is at least 0.3 wt% such as at least 0.5 wt%, at least 1 wt%, at least 1.5 wt% or at least 2 wt%.
  • the amount of ammonium sulfate added to the spray water spray-water prior to glyphosate acid is no more than 6 wt%, preferably no more than 5 wt%, such as no more than 4 wt%, no more than 3 wt% or no more than 2 wt% wherein the amounts are based on the final solution composition.
  • the concentration of glyphosate in the final spray-water volume is preferably 0.3 wt% to 3.
  • the quantity of glyphosate acid powder added to the spray tank is typically sufficient to provide an application rate of 0.1 kg/ha-2 kg/ha, preferably about 0.5kg/ha.
  • the glyphosate may be introduced to the spray tank in the form of an aqueous slurry which can be prepared in an induction hopper such as those described herein.
  • the induction hopper will typically provide mixing of the glyphosate acid powder and water in a swirling action.
  • the concentration of glyphosate and the application rate in g/ha will depend on whether the composition is used in crop-topping weed control or general control of weeds such as fallow or pre-seed treatment.
  • concentration and rate may be determined having regard to the type and age of weed and the rate required for effective control.
  • the concentration of glyphosate is typically in the range of 1.8 g/L to 3.0 g/L such as about 2.4 g/L.
  • the concentration is typically 4.0 g/L to 10 g/L and preferably 5 g/L to 8 g/L.
  • the crop-topping rate is typically 80 g/ha to 180 g/ha.
  • the rate is typically 300 g/ha to 1000 g/ha.
  • the glyphosate may be transferred to the spray tank from a bag containing, for example 10 kg or 15 kg of glyphosate, by pouring the glyphosate from the bag into an induction hopper, which may be fitted onto the spray tank opening, so as to form a slurry of the glyphosate powder prior to addition to the spray tank.
  • the amount of glyphosate may be measured using a chute attachment fitted to a bulker bag to measure weighed amounts of glyphosate which may be delivered into a container, such as a suitable bag for containing for example 10 kg or 15 kg of glyphosate.
  • the wetter is in the form of a liquid composition at 20 Q C.
  • the liquid composition may, and preferably will, comprise a high concentration of the wetter surfactant such as at least 600g/L preferably 800 g/L of wetter surfactant, more preferably at least 900 g/L wetter surfactant and still more preferably at least 1000 g/L of wetter surfactant.
  • the wetter surfactant is itself preferably in the form of a liquid at 20 Q C or a low melting point solid. Low melting point solids may, and preferably will, be presented as liquid formulations. It is particularly preferred that the wetter surfactant is a liquid at 20 Q C. This allows convenient handling of the wetter surfactant by farmers who are more accustomed to dealing with liquid compositions of wetters and the high concentration of liquid wetter surfactant allows storage and handling of this component to be conveniently managed.
  • the wetter surfactant is present preferably present in the final spray-water composition in an amount of at least 0.05 wt% preferably at least 0.1 wt%.
  • the wetter surfactant is typically present in the final spray-water composition in an amount of no more than 2 wt%, preferably no more than 1.5 wt%, more preferably no more than 1 wt% and still more preferably no more than 0.5 wt% of the final spray-water.
  • the wetter components may comprise a surfactant chosen from the group consisting of alkylaryl ethoxylates, alkyl ethoxylates, amidoaliphaticbetaines, alkylamine alkoxylates particularly fatty amine ethoxylates such as tallowamine ethoxylates, cocobetaine, alkoxylated aliphaticamines, alkylpolyglucosides, alkylglycosides, aliphatic amines, quaternary amines, aliphatic acetates, ethylene diamine ethoxylates, amphoteric surfactants such as polyoxyethylene aliphatic amine oxides and polyoxyethylene aliphatic ether salts, amine oxides and amphoacetates.
  • a surfactant chosen from the group consisting of alkylaryl ethoxylates, alkyl ethoxylates, amidoaliphaticbetaines, alkylamine alkoxylates particularly fatty
  • aliphatic is used to include saturated as well as unsaturated hydrocarbon chains and includes linear and branched chains.
  • Glyphosate-synergising surfactants typically contain at least one aliphatic group containing 8 to 22, more frequently 12 to 18 carbon atoms. Discussions of glyphosate-synergising surfactants are provided in US 6207617, WO 95/16351 , US Pub 20030158042, US Pub 20050170965 and US Pub 20040224846 the contents of which are herein incorporated by reference.
  • the preferred surfactants are selected from aliphatic, betaines amidoaliphaticbetaines and tallow amine ethoxylates.
  • Preferred surfactant include alcohol ethoxylates, alkylarylethoxylates, fatty amine ethoxylates, organosilicones and mixtures of alcohol ethoxylates and alkylarylethoxylates. Suitable agriculturally acceptable surfactants are available from these classes.
  • the wetter added to the spray tank comprises a nonionic wetter, more preferably comprises at least one wetter chosen from alkylphenol ethoxylates, such as octyl phenyl ethoxylates and nonyl phenol ethoxylates, and alcohol ethoxylates, more preferably the wetter surfactant comprises both a nonylphenol ethoxylate and an alcohol ethoxylate.
  • alkylphenol ethoxylates such as octyl phenyl ethoxylates and nonyl phenol ethoxylates
  • alcohol ethoxylates more preferably the wetter surfactant comprises both a nonylphenol ethoxylate and an alcohol ethoxylate.
  • a suitable wetter is “Wetter 1000” available from FMC Australia which contains 1000 g/L nonyl phenol and alcohol ethoxylates.
  • the method may be conducted at ambient temperature where the temperature.
  • the method is conducted using water at a temperature of at least 5 Q C preferably at least 10 Q C, more preferably at least 15 Q C and most preferably at least 20C.
  • the temperature of the water is generally not more than 40 Q C and may be not more than 35 Q C such as not more than 30 Q C or not more than 25 Q C.
  • Water may be heated by running it through black polymer (e.g. polyethylene) pipe or other means such as solar heating or direct conductive heating.
  • the glyphosate solution prepared according to the method may be used in method of the invention may be used in spay application to plants to control plant growth such as in the preparation of fallow land, pre-sowing preparation of land and crop-topping.
  • “Crop-topping” is the application of a non-selective herbicide (in this case glyphosate) prior to crop harvest when the target weed is at flowering/early grain fill.
  • the selectivity of the crop-topping process is dependent on a sufficient gap in physiological maturity between crop and weed. Crop-topping is particularly useful in control of weeds in pulse crops.
  • a method as described herein further comprising spray application of the glyphosate solution onto an area of land in which the growth of undesirable plants is to be controlled.
  • the spray application is used in preparation of fallow land or pre-so land preparation.
  • the spray application of the glyphosate solution is carried out over a plant crop to provide crop topping.
  • the method for preparation of the glyphosate acid solution may include addition of a co-pesticides, such as herbicide, fungicides and insecticides, such as one or more herbicides or insecticides registered for pest control in croplands and pastures.
  • a co-pesticide such as herbicide, fungicides and insecticides, such as one or more herbicides or insecticides registered for pest control in croplands and pastures.
  • the co-pesticide may be added at any stage during the method such as after the mixing of the ammonium sulfate and glyphosate acid.
  • the co-pesticide may, for example, be added in the form of a water-soluble salt, a solution of a water-soluble salt or emulsifiable concentrate of an ester.
  • the co-pesticide component when used is added to the spray tank at some time before completing the addition of spray-water.
  • the co-pesticide may be an acid, acid-salt or ester functional pesticide such as
  • the relevant herbicides may include: benzoic acid herbicides such as cambendichlor, chloramben, dicamba, 2,3,6-TBA and tricamba; pyrimidinyloxybenzoic acid herbicides such as bispyribac and pyriminobac; pyrimidinylthiobenzoic acid herbicides such as pyrithiobac; picolinic acid herbicides such as aminopyralid, clopyralid, florpyrauxifen halauxifen and picloram; quinolinecarboxylic acid herbicides such as quinclorac; phenoxyacetic herbicides such as clacyfos, 4-CPA, 2,4-D, 3,4-DA, MCPA and 2,4,5-T; phenoxybutyric herbicides such as 4-CPB2, 4-DB, 3,4-DB, MCPB and 2,4,5-TB; phenoxypropionic herbicides such as cloprop, 4-CPP, dichlorprop, dichlorprop-P
  • the additional herbicide may be in the form of an ester or salt.
  • the additional pesticide when present may be selected from the group consisting of dicamba, aminopyralid, clopyralid, picloram, quinclorac, 2,4-D ester, MCPA, dichlorprop, dichlorprop-P, mecoprop and mecoprop-P herbicides.
  • Preferred herbicides and insecticides for inclusion as co-pesticides may be selected from the group consisting of cypermethrin pendimethalin, oxyfluorfen, trifluralin, diuron, metolachlor, chlorpyrifos, simazine and atrazine.
  • the aqueous glyphosate acid composition during preparation in accordance with the invention is tank mixed with c co-pesticide liquid composition.
  • co-pesticides which may be tank mixed in liquid form include trifluralin, s-metolachlor, prosulfocarb, 2,4-D isobutylester, carfentrazone and oxyfluorfen.
  • Some specific examples of these compositions are commercially available as Trifluralin 480, s-metolachlor 960, prosulfocarb 800, 2,4-D IBE 800 (isobutyl ester), carfentrazone 240 and oxyfluorfen 240.
  • the number following the pesticide name generally refers to the concentration of the active in grams per litre of liquid composition.
  • the co-pesticide is preferably in the form of a suspension concentrate, solution concentrate or emulsifiable concentrate.
  • the 2,4-D ester co-herbicide may be added in a formulation in an amount of at least 40% on a weight/volume (w/v) of the 2,4-D ester herbicide (based on acid equivalent), preferably more than 60% w/v, more preferably about 62.5% w/v.
  • spray-water refers to the water used in formulating aqueous pesticidal compositions for spray application in control of pests especially pesticidal formulations, which are in a diute form to provide a sprayable preparation, for example, a pressure pack (“aerosol”) or commercial scale mobile boom sprayer, for domestic, horticultural or agricultural use.
  • concentration of materials in the spray water refers to the final spray water volume which may, in accordance with the described process be made up to the final volume following addition of the materials such as ammonium sulfate, glyphosate acid, wetter and optionally additional pesticide.
  • ha is used as an abbreviation of hectare and g/ha and kg/ha refer to grams per hectare and kilograms per hectare respectively.
  • Spray-water was run into a 5000L spray tank on a boom spray rig.
  • the water was passed through a chemical induction hopper mounted on the spray rig, and the passage of water in the chemical induction hopper caused the water in the hopper to swirl.
  • ammonium sulfate was added to the swirling water stream in the chemical hopper (at a rate of 2kg per 100L of final spray-water volume).
  • Example 3 (solubilisation of glyphosate acid in aqueous solution of ammonium sulfate)
  • T3 is a composition in accordance with the invention.
  • the application equipment was a handheld 2m boom, the nozzle size was 110-015, the nozzle type was “Agrotop” Flat fan air induction, spray water application rate 60 L/ha, spraying pressure 230 kPa.
  • Example 7 (examples of spray tank water preparation according to the invention)
  • Example 8 Spray-water preparations according to the invention.
  • Preferred for this invention are alcohol ethoxylates, alkylaryl ethoxylates and blends thereof.
  • wetters of this type are available under the trade name “Wetter 1000” sold by 4 farmers, a liquid product which comprises 1000g/L nonylphenol and alcohol ethoxylate blend.
  • the options include:
  • the application equipment was a handheld 2m boom, the nozzle size was 110-015, the nozzle type was “Agrotop” Flat fan air induction, spray water application rate 100 L/ha, spraying pressure 250 kPa.
  • treatment T2 according to the invention (at 350g/ha glyphosate acid) provided significantly better weed brown-out than treatment T4 (same glyphosate acid equivalent as T2, same ammonium sulfate, same wetter cone.) - the only difference between the two treatments is that glyphosate acid was used in T2 rather than ammonium glyphosate in T4.
  • compositions in accordance with the invention may be prepared according to T3 of Table 1 with variation to include a further tank-mixed pesticide in the form of a liquid compositions shown in Table 10.
  • the copesticide was added following the AMS and glyphosate acid.
  • the specified co-pesticides in liquid form were found to be compatible when tank-mixed in carrying out the method of the invention.
  • the water used was tap water in Welshpool Western Australia.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

L'invention concerne un procédé de préparation d'une solution de glyphosate dans un réservoir de pulvérisation, comprenant l'ajout de sulfate d'ammonium à l'eau de pulvérisation dans le réservoir de pulvérisation; l'ajout d'une poudre d'acide de glyphosate à l'eau de pulvérisation dans le réservoir de pulvérisation ; l'ajout d'un tensioactif humide à l'eau de pulvérisation dans le réservoir de pulvérisation.
PCT/AU2021/050354 2020-04-24 2021-04-21 Procédé de préparation d'une composition de glyphosate WO2021212171A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA3176471A CA3176471A1 (fr) 2020-04-24 2021-04-21 Procede de preparation d'une composition de glyphosate
AU2021261046A AU2021261046A1 (en) 2020-04-24 2021-04-21 Method for preparation of glyphosate composition
ZA2022/11454A ZA202211454B (en) 2020-04-24 2022-10-19 Method for preparation of glyphosate composition

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2020901288A AU2020901288A0 (en) 2020-04-24 Method for Preparation of Glyphosate Composition
AU2020901288 2020-04-24

Publications (1)

Publication Number Publication Date
WO2021212171A1 true WO2021212171A1 (fr) 2021-10-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2021/050354 WO2021212171A1 (fr) 2020-04-24 2021-04-21 Procédé de préparation d'une composition de glyphosate

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Country Link
AU (2) AU2021102098A4 (fr)
CA (1) CA3176471A1 (fr)
WO (1) WO2021212171A1 (fr)
ZA (1) ZA202211454B (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991008666A1 (fr) * 1989-12-20 1991-06-27 Cheminova Agro A/S Preparation herbicide contenant de l'acide de glyphosate
WO1992012637A1 (fr) * 1991-01-24 1992-08-06 Monsanto Company Formulations ameliorees a base de glyphosate
EP0290416B1 (fr) * 1987-04-29 1993-06-23 Monsanto Europe S.A./N.V. Formulations de glyphosate
EP0498145B1 (fr) * 1991-02-08 1995-11-15 Monsanto Europe S.A./N.V. Compositions solides de glyphosate et leurs utilisations
US6475954B2 (en) * 2000-10-23 2002-11-05 Schirm Ag Solid glyphosphate-formulation and manufacturing process
WO2011069202A1 (fr) * 2009-12-08 2011-06-16 Eureka! Agresearch (Vic) Pty Ltd Nouvelle formulation de glyphosate

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290416B1 (fr) * 1987-04-29 1993-06-23 Monsanto Europe S.A./N.V. Formulations de glyphosate
WO1991008666A1 (fr) * 1989-12-20 1991-06-27 Cheminova Agro A/S Preparation herbicide contenant de l'acide de glyphosate
WO1992012637A1 (fr) * 1991-01-24 1992-08-06 Monsanto Company Formulations ameliorees a base de glyphosate
EP0498145B1 (fr) * 1991-02-08 1995-11-15 Monsanto Europe S.A./N.V. Compositions solides de glyphosate et leurs utilisations
US6475954B2 (en) * 2000-10-23 2002-11-05 Schirm Ag Solid glyphosphate-formulation and manufacturing process
WO2011069202A1 (fr) * 2009-12-08 2011-06-16 Eureka! Agresearch (Vic) Pty Ltd Nouvelle formulation de glyphosate

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS REG: "Roundup Prodry Herbicide", PRODUCT LABEL, 27 November 2010 (2010-11-27), XP055864803, Retrieved from the Internet <URL:https://web.archive.org/web/20101127093718if_/http://natseed.com/pdf/Roundup%20Pro%20Dry%20Label.pdf> [retrieved on 20211123] *
ANONYMOUS: "Spray Grade Ammonium Sulphate 980 HERBICIDE ADJUVANT", APPARENT, 18 February 2017 (2017-02-18), XP055864799, Retrieved from the Internet <URL:https://web.archive.org/web/20170218072106if_/http://www.apparentag.com.au/documents/brochures/66719_APPARENT_SPRAY-GRADE_AMMONIUM_SULPHATE_ADJUVANT_Booklet_1.pdf> [retrieved on 20211123] *
ANONYMOUS: "Titan Spray Grade Ammonium Sulphate Herbicide Adjuvant", TITAN AG, 19 February 2017 (2017-02-19), XP055864785, [retrieved on 20211123] *

Also Published As

Publication number Publication date
AU2021261046A1 (en) 2022-11-17
ZA202211454B (en) 2023-06-28
AU2021102098A4 (en) 2021-06-17
CA3176471A1 (fr) 2021-10-28

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