Patent Grant
12144342
The present subject matter relates to pesticidal compositions for use in agricultural pest control applications. In particular, this subject matter provides a stable fungicidal oil liquid formulation comprising at least one dithiocarbamate fungicide, suspended in a non-aqueous liquid carrier; and at least one triazole fungicide and at least one strobilurin fungicide, dissolved in the non-aqueous liquid currier.
Dithiocarbamates are generally known to have effective fungicidal activity. However, a particular problem of these active ingredients is their relatively high instability. This is caused by the low stability of the C—S bonds and of the thiocarbamate function, in particular at low pH values and in the presence of nucleophilic agents.
These active ingredients may be formulated as solid formulations in order to improve their stability. Solid powder formulations which are known are, for example, Manzate 75 WG (product of DuPont), Polyram DF (product of Nufarm) and Vondozeb 75 WG (product of Agrosimex). However, there are known disadvantages with solid formulations such as water dispersible granules. Some of these may include poor dispersion in water, difficulties in measuring dosages, compatibility with other components in tank mix and the high cost to manufacture such formulations.
In many cases, liquid products are preferred nowadays to the abovementioned solid formulations. The liquid products have the advantage that they show good miscibility, even under ULV (ultra-low volume) conditions, with oil-based tank-mix additives, in a water/oil formulations or oil formulations (see EP0435760 and EP0697171).
Agrochemical oil dispersions (OD) are stable suspensions of agrochemical active ingredients, such as pesticides and crop protection chemicals, in non-aqueous fluids, which may contain other dissolved active ingredients. Oil dispersions are particularly useful for formulating oil insoluble solid active ingredients.
Oil dispersion formulations are a concentrate which is diluted with water before use to produce an aqueous composition which is used in crop protection. In order to enable dispersion in water, such formulation contain emulsifies, dispersants and further formulation components such as thickeners, antifoaming agents and solid carriers. Oil dispersions are often chosen if the active ingredient is sensitive to water or if the oil is required to act as an adjuvant in order to improve biological performance of the pesticide. Oil dispersions are usually free of water. This is either to prevent degradation of active ingredients and to prevent phase separation of the formulation.
Oil dispersion formulations provide certain advantages to the farmer. Active ingredients which are usually unstable in water may now be formulated in solid suspended form. Oil-based adjuvants may also be combined with these types of formulations in order to enhance efficacy. Further, suspension of active ingredients in non-aqueous liquid carrier can possibly lead to higher active ingredient strength formulations than would otherwise be possible. This is because active ingredients have a solubility limit on the amount that can be added into a formulation.
A disadvantage of the existing oil dispersion formulations is that such formulations frequently show phase separation after storage. Thus, storage even at ambient temperatures leads to aggregation effects, lump formation or pronounced settling off the suspended phase. Depending on the density of the active ingredient and of the non-aqueous liquid carrier used, it is also possible for the active ingredient particles to separate from the non-aqueous liquid carrier. In some cases, the effects are irreversible.
A common method to solve this problem is to add to the oil dispersion formulations, anti-settling agents. These may include a thickener that increases the viscosity of the system and acts as suspending agent by reducing the settling rate of the particles.
As described in WO 2009/004281, typical thickeners for physically stable oil dispersion include organoclays such as smectite, hectorite or montmorillonite clays which are organophilic and therefore compatible with non-aqueous formulations. The use of these thickeners is further described for example in EP 789999, GB 2067407, EP 149459 and GB 2008949.
Other known thickeners are hydrophobically-modified silicas and synthetic polymers that are described, for example, in WO 2008135854 and U.S. Pat. No. 5,599,768. However, these thickeners are difficult to dissolve and homogenize them while avoiding the formation of gels or lumps and continued and careful monitoring of the process is required.
WO 2012/167322 relates to an agricultural oil-based suspension formulation comprising an active ingredient suspended in finely divided form in an oil; and at least one surfactant selected from a polyalkylene glycol-fatty acid condensate or a polyalkylene glycolether fatty acid condensate.
WO 2012/167321 relates to an agricultural oil-based suspension formulation comprising an active ingredient suspended in finely divided form in an oil; and at least one unsaturated rubber-type copolymer or a mixture thereof, wherein the rubber-type copolymer comprises at least styrene as a residue.
WO 2012/080208 relates to a method for the preparation of an agrochemical oil dispersion comprising a thickener which is an amide obtained by reacting a polyhydroxystearic acid with diethylene triamine and/or triethylene tetramine.
WO 2014/169363 relates to new agrochemical formulations of the oil dispersion type that comprise at least one active ingredient suspended in an oil phase, dispersants, a clay-based, rheological additive, a cellulose-derived, rheological additive and emulsifies, and optionally at least one additional active ingredient solubilized in the oil phase.
CN 104247712 relates to a dispersible oil suspension consisting of pyraclostrobin, mancozeb, an emulsifier, a dispersant, a wetting agent, a thickening agent, an antifreezing agent, a stabilizer, and a dispersion medium.
During the last decade the need for new agrochemical compositions with high performance has been increasing, while the number of chemicals approved for use in agrochemical compositions by regulatory authorities has been decreasing due to more rigid standards for the toxicological and ecological properties of these materials. As such, there is a need in the art for a fungicidal composition which allows reduced application rates of individual active ingredients while concurrently maintaining an increased efficacy of the active ingredients. Further, the combination of a multi-site fungicide (such as a dithiocarbamate fungicide) with two systemic fungicides (such as a triazole fungicide and a strobilurin fungicide) in a stable formulation provides a solution which reduces resistance of the diseases, reduces application rates of the active ingredients, improves yield and reduces costs.
Based on the aspects discussed above, there is a need in the art for a physically stable oil liquid formulation which will include a combination of a multi-site fungicide (such as a dithiocarbamate fungicide) with two systemic fungicides.
According to one aspect, the present subject matter provides a fungicidal oil liquid formulation comprising: a) at least one dithiocarbamate fungicide; b) at least one co-fungicide selected from the group consisting of triazole fungicides and strobilurin fungicides; and c) an agrochemically acceptable non-aqueous liquid carrier; wherein the dithiocarbamate fungicide is suspended in the liquid carrier; wherein the co-fungicide is dissolved in the liquid carrier; and wherein the liquid carrier optionally comprises an adjuvant.
According to another aspect, the present subject matter provides a fungicidal oil liquid formulation comprising: a) at least one dithiocarbamate fungicide; and b) at least one triazole fungicide; c) at least one strobilurin fungicide; and d) an agrochemically acceptable non-aqueous liquid carrier; wherein the dithiocarbamate fungicide is suspended in the liquid carrier; wherein the triazole fungicide and the strobilurin fungicide are dissolved in the liquid carrier, and wherein the liquid carrier optionally comprises an adjuvant.
According to a further aspect, the present subject matter provides a fungicidal oil liquid formulation comprising: a) 20-60% by weight of at least one dithiocarbamate fungicide; b) 1-15% by weight of a combination of a triazole fungicide and a strobilurin fungicide; c) 10-50% by weight of a non-aqueous liquid carrier; and d) 1-40% by weight of at least one surfactant; wherein the dithiocarbamate fungicide is suspended in the liquid carrier; wherein the triazole fungicide and the strobilurin fungicide are dissolved in the liquid carrier; and wherein the liquid carrier optionally comprises an adjuvant.
According to a further aspect, the present subject matter provides a fungicidal suspoemulsion formulation comprising: a) the above mentioned fungicidal oil liquid formulation; and b) water.
According to yet a further aspect, the present subject matter provides a use of the fungicidal oil liquid formulation, for controlling or preventing a pest on plants or propagation material thereof.
All technical and scientific terms used herein have the same meanings as commonly understood by someone ordinarily skilled in the art to which the present subject matter belongs. The following definitions are provided for clarity.
As used herein, the term “pesticide” broadly refers to an agent that can be used to control and/or kill a pest. The term is understood to include but is not limited to fungicides, insecticides, nematicides, herbicides, acaricides, parasiticides or other control agents. For chemical classes and applications, as well as specific compounds of each class, see “The Pesticide Manual Thirteenth Edition” (British Crop Protection Council, Hampshire, UK, 2003), as well as “The e-Pesticide Manual, Version 3” (British Crop Protection Council, Hampshire, UK, 2003-04), the contents of each of which are incorporated herein by reference in their entirety.
As used herein the term “plant” or “crop” includes reference to whole plants, plant organs (e.g. leaves, stems, twigs, roots, trunks, limbs, shoots, fruits etc.), plant cells, or plant seeds. This term also encompasses plant crops such as fruits. In yet another embodiment, the term “plant” may include the propagation material thereof, which may include all the generate parts of the plant such as seeds and vegetative plant material such as cuttings and tubers, which can be used for the multiplication of the plant. This includes seeds, tubers, spores, corms, bulbs, rhizomes, sprouts basal shoots, stolons, and buds and other parts of plants, including seedlings and young plants, which are to be transplanted after germination or after emergence from soil.
As used herein, the term “locus” includes not only areas where weeds may already be growing, but also areas where weeds have yet to emerge, and also to areas under cultivation.
As used herein, the term “mixture” or “combination” refers, but is not limited to, a combination in any physical form, e.g., blend, solution, alloy, or the like.
As used herein, the term “effective amount” refers to an amount of the compound that, when ingested, contacted with or sensed, is sufficient to achieve a good level of control.
As used herein, the phrase “enhancing crop plants” means improving one or more of plant quality, vigor, nutrient uptake, root strength, and/or tolerance to stress factors, any of which may lead to improved yield.
As used herein, the phrase “enhancing roots system” means the roots system is improved qualitatively or quantitatively. Enhanced roots system include but are not limited to improved visual appearance and composition of the roots system (i.e., improved color, density, uniformity, and visual appearance), increased root growth, a more developed root system, stronger and healthier roots, improved plant stand, and increased roots system weight.
As used herein, the phrase “improving nutrient uptake” or “increasing nutrient uptake” means the uptake of one or more nutrients is improved qualitatively or quantitatively. Such nutrients include but are not limited to nitrogen, phosphorus, potassium, calcium, copper, zinc, sulfur, and magnesium.
As used herein, the phrase “improving plant quality” means that one or more traits are improved qualitatively or quantitatively. Such traits include but are not limited to improved visual appearance and composition of the plant (i.e., improved color, density, uniformity, compactness), reduced ethylene (reduced production and/or inhibition of reception), improved visual appearance and composition of harvested material (i.e., seeds, fruits, leaves, vegetables), improved carbohydrate content (i.e., increased quantities of sugar and/or starch, improved sugar acid ratio, reduction of reducing sugars, increased rate of development of sugar), improved protein content, improved oil content and composition, improved nutritional value, reduction in anti-nutritional compounds, increased nutrient uptake, stronger and healthier roots, improved organoleptic properties (i.e, improved taste), improved consumer health benefits (i.e., increased levels of vitamins and antioxidants), improved post-harvest characteristics (i.e., enhanced shelf-life and/or storage stability, easier processability, easier extraction of compounds), and/or improved seed quality (i.e., for use in following seasons).
As used herein, the phrase “improving plant vigor” means that one or more traits are improved qualitatively or quantitatively. Such traits include but are not limited to early and/or improved germination, improved emergence, the ability to use less seeds, increased root growth, a more developed root system, stronger and healthier roots, increased shoot growth, increased tillering, stronger tillers, more productive tillers, increased or improved plant stand, decreased plant lodging, an improvement in plant height, an increase in plant weight (fresh or dry), bigger leaf blades, greener leaf color, increased pigment content, increased photosynthetic activity, earlier flowering, homogenous flowering, longer panicles, early grain maturity, increased seed, fruit, or pod size, increased pod or ear number, increased seed number per pod or ear, increased seed mass, enhanced seed filling, less dead basal leaves, delay of senescence, improved vitality of the plant and/or less inputs needed (i.e., less fertilizer, water, and/or labor).
As used herein, the phrase “improving tolerance to stress factors” means that one or more traits are improved qualitatively or quantitatively. Such traits include but are not limited to increased tolerance and/or resistance to abiotic stress factors, which cause suboptimal growing conditions such as drought (i.e., any stress which leads to a lack of water content in plants, a lack of water uptake potential or a reduction in the water supply to plants), cold exposure, heat exposure, osmotic stress, UV stress, flooding, increased salinity (i.e., in the soil), increased mineral exposure, ozone exposure, high light exposure and/or limited availability of nutrients (i.e., nitrogen and/or phosphorous nutrients).
As used herein, the phrase “improving plant yield” or “improving yield” means that where it is possible to take a quantitative measurement, the yield of a product of the respective plant is increased. Such an improvement in yield includes but is not limited to (a) an increase in biomass production, grain yield (i.e., grain size, grain number, grain density), starch content, oil content, and/or protein content, which may result from (i) an increase in the amount produced by the plant per se, or (ii) an improved ability to harvest plant matter; (b) an improvement in the composition of the harvested material (i.e., improved sugar acid ratios, improved oil composition, increased nutritional value, reduction of anti-nutritional compounds, increased consumer health benefits); and/or (c) an increased/facilitated ability to harvest the crop, improved processability of the crop, and/or better storage stability/shelf life.
As used herein, the phrase “agriculturally acceptable carrier” means carriers which are known and accepted in the art for the formation of formulations for agricultural or horticultural use.
As used herein, the term “adjuvant” is broadly defined as any substance that itself is not a fungicide but which enhances or is intended to enhance the effectiveness of the fungicide with which it is used. Adjuvants may be understood to include sticking agents, spreading agents, surfactants, synergists, penetrants, compatibility agents, buffers, acidifies, defoaming agents, thickeners and drift retardants.
The term “a” or “an” as used herein includes the singular and the plural, unless specifically stated otherwise. Therefore, the terms “a,” “an” or “at least one” can be used interchangeably in this application.
Throughout the application, descriptions of various embodiments use the term “comprising”; however, it will be understood by one of skill in the art, that in some specific instances, an embodiment can alternatively be described using the language “consisting essentially of” or “consisting of.”
For purposes of better understanding the present teachings and in no way limiting the scope of the teachings, unless otherwise indicated, all numbers expressing quantities, percentages or proportions, and other numerical values used in the specification and claims, are to be understood as being modified in all instances by the term “about.” Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained. At the very least, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. In this regard, used of the term “about” herein specifically includes ±10% from the indicated values in the range. In addition, the endpoints of all ranges directed to the same component or property herein are inclusive of the endpoints, are independently combinable, and include all intermediate points and ranges.
Fungicidal Oil Liquid Formulations
The oil liquid formulations of the present subject matter were found to be stable and showed no phase separation, precipitation or particle agglomeration when stored for a long period of time. Moreover, a major advantage of this formulation is the ability to suspend a high concentration of at least one dithiocarbamate fungicide in the non-aqueous liquid carrier and dissolve at least one triazole fungicide and at least one strobilurin fungicide in the non-aqueous liquid carrier without loss of stability of the formulation. This allows active ingredients with different physicochemical properties commonly formulated into formulations such as SC and WG, to be combined into a single formulation.
Such combination of different active ingredients in a single formulation is important;
In addition, there is an economic advantage in that the oil liquid formulation may include an adjuvant therein, as opposed to adding the adjuvant in the spray tank. This further brings logistic, packaging, and storage benefits to the farmer, as a single product can be used instead of two or more.
The present subject matter relates to a fungicidal oil liquid formulation comprising: (a) at least one dithiocarbamate fungicide; (b) at least one triazole fungicide; (c) at least one strobilurin fungicide, and (d) an agrochemically acceptable non-aqueous liquid carrier; wherein the dithiocarbamate fungicide is suspended in the liquid carrier; and wherein the triazole fungicide and the strobilurin fungicide are dissolved in the liquid carrier, and wherein the liquid carrier optionally comprises an adjuvant.
According to another embodiment, the subject matter relates to a fungicidal oil liquid formulation comprising: (a) at least one dithiocarbamate fungicide; (b) at least one co-fungicide selected from the group consisting of triazole fungicides and strobilurin fungicides, and (c) an agrochemically acceptable non-aqueous liquid carrier; wherein the dithiocarbamate fungicide is suspended in the liquid carrier; and wherein the co-fungicide is dissolved in the liquid carrier, and wherein the liquid carrier optionally comprises an adjuvant.
The dithiocarbamate fungicide may include but is not limited to ferbam, mancozeb, maneb, metiram, propineb, thiram, zinc thiazole, zineb and ziram.
The triazole fungicide may include but is not limited to azaconazole, bitertanol, bromuconazole, cyproconazole, difenoconazole, diniconazole, epoxiconazole, etaconazole, fenbuconazole, fluquinconazole, flusilazole, flutriafol, hexaconazole, imibenconazole, ipconazole, metconazole, myclobutanil, penconazole, propiconazole, simeconazole, tebuconazole, tetraconazole, triadimefon, triadimenol, triticonazole and prothioconazole.
The strobilurin fungicide may include but is not limited to azoxystrobin, coumoxystrobin, enoxastrobin, flufenoxystrobin, picoxystrobin, pyraoxystrobin, mandestrobin, pyraclostrobin, pyrametostrobin, triclopyricarb, kresoxim-methyl, trifloxystrobin, dimoxystrobin, fenaminstrobin, metominostrobin, orysastrobin and fluoxastrobin.
For chemical classes of fungicides, as well as specific compounds of each class, see “The Pesticide Manual Thirteenth Edition” (British Crop Protection Council, Hampshire, UK, 2003), as well as “The e-Pesticide Manual, Version 5.2” (British Crop Protection Council, Hampshire, UK, 2008-2011), the contents of each of which are incorporated herein by reference in their entirety.
In a preferred embodiment, the subject matter relates to a fungicidal oil liquid formulation comprising: a) mancozeb, suspended in a non-aqueous liquid carrier; and b) tebuconazole and picoxystrobin, dissolved in the non-aqueous liquid carrier.
In another preferred embodiment, the subject matter relates to a fungicidal oil liquid formulation comprising: a) mancozeb, suspended in a non-aqueous liquid carrier; and b) prothioconazole and picoxystrobin, dissolved in the non-aqueous liquid carrier.
In another preferred embodiment, the subject matter relates to a fungicidal oil liquid formulation comprising: a) mancozeb, suspended in a non-aqueous liquid carrier; and b) prothioconazole and trifloxystrobin, dissolved in the non-aqueous liquid carrier.
In another preferred embodiment, the subject matter relates to a fungicidal oil liquid formulation comprising: a) mancozeb, suspended in a non-aqueous liquid carrier; and b) prothioconazole, dissolved in the non-aqueous liquid carrier.
In an embodiment, the amount of the dithiocarbamate fungicide may be about (0.1-80 wt. %, or about 0.1-70 wt. %, based on the total weight of the composition. In a further embodiment, the dithiocarbamate fungicide may be present in a concentration of about 20-60% by weight based upon the total weight of the composition. In yet a further embodiment, the dithiocarbamate fungicide may be present in a concentration of about 25-50% by weight based upon the total weight of the composition. In another embodiment, the dithiocarbamate fungicide may be present in a concentration of about 30-40% by weight based upon the total weight of the composition. In another embodiment, the dithiocarbamate fungicide may be present in a concentration of about 35-45% by weight based upon the total weight of the composition. In a specific embodiment, the dithiocarbamate fungicide may be present in a concentration of about 38% by weight based upon the total weight of the composition.
In an embodiment, the amount of the triazole fungicide and the strobilurin fungicide together may be present in a concentration of about 0.1-30 wt. %, based on the total weight of the composition. In a further embodiment, the amount of the triazole fungicide and the strobilurin fungicide together may be present in a concentration of about 1-15% by weight based upon the total weight of the composition. In another embodiment, the amount of the triazole fungicide and the strobilurin fungicide together may be present in a concentration of about 1-10% by weight based upon the total weight of the composition. In yet another embodiment, the amount of the triazole fungicide and the strobilurin fungicide together may be present in a concentration of about 3-8% by weight based upon the total weight of the composition. In a specific embodiment, the amount of the triazole fungicide and the strobilurin fungicide together may be present in a concentration of about 5% by weight based upon the total weight of the composition.
In an embodiment, the amount of the co-fungicide may be present in a concentration of about 0.1-30 wt. %, based on the total weight of the composition. In a further embodiment, the amount of the co-fungicide may be present in a concentration of about 1-15% weight based upon the total weight of the composition. In another embodiment, the amount of the co-fungicide may be present in a concentration of about 1-10% by weight based upon the total weight of the composition. In yet another embodiment, the amount of the co-fungicide may be present in a concentration of about 1-5% by weight based upon the total weight of the composition. In a specific embodiment, the amount of the co-fungicide may be present in a concentration of about 3% by weight based upon the total weight of the composition.
According to embodiments, the non-aqueous liquid carrier may include but is not limited to aromatic hydrocarbons (e.g. toluene, o-, m-, p-xylene, ethylbenzene, isopropylbenzene, tert-butylbenzene, naphthalenes, mono- or polyalkyl-substituted naphthalenes), paraffins (e.g. octane, nonane, decane, undecane, dodecane, tridecane, tetradecane, pentadecane, hexadecane, hepta-decane, octa-decane, nona-decane, eicosance, heneicosane, docosane, tricosane, tetracosane, pentacosane, and branched chain isomers thereof), petroleum, ketones (e.g. acetophenone, cyctohexanone), vegetable oil (e.g. olive oil, kapok oil, castor oil papaya oil, camellia oil, palm oil, sesame oil, corn oil, rice bran oil, peanut oil, cotton seed oil, soybean oil, rapeseed oil, linseed oil, tung oil, sunflower oil, safflower oil, tall oil), alkyl ester of vegetable oils, (e.g. rapeseed oil methyl ester or rapeseed oil ethyl ester, rapeseed oil propyl esters, rapeseed oil butyl esters, tall oil fatty acids esters etc . . . ), diesel, mineral oil, fatty acid amides (e.g. C1-C3 amines, alkylamines or alkanolamines with C6-C18 carboxylic acids), fatty acids, tall oil fatty acids, alkyl esters of fatty acids (e.g. C1-C4 monohydric alcohol esters of C8 to C22 fatty acids such as methyl oleate, ethyl oleate), modified vegetable oils and combinations thereof.
In a preferred embodiment, the non-aqueous liquid carrier may include but is not limited to aromatic hydrocarbons, fatty acid amides, alkyl ester of vegetable oils and vegetable oils.
In an embodiment, the amount of the non-aqueous liquid carrier may be about 0.1-60 wt %, about 0.1-55 wt. %, or about 0.1-50 wt. %, based on the total weight of the composition. In another embodiment, the non-aqueous liquid carrier may be present in a concentration of about 10-50% by weight based upon the total weight of the composition. In a further embodiment, the non-aqueous liquid carrier may be present in a concentration of about 15-50% by weight based upon the total weight of the composition. In another embodiment, the non-aqueous liquid carrier may be present in a concentration of about 20-40% by weight based upon the total weight of the composition. In yet another embodiment, the non-aqueous liquid carrier may be present in a concentration of about 25-40% by weight based upon the total weight of the composition. In a further embodiment, the non-aqueous liquid carrier may be present in a concentration of about 30-35% by weight based upon the total weight of the composition. In a specific embodiment, the non-aqueous liquid carrier may be present in a concentration of about 34% by weight based upon the total weight of the composition.
According to embodiments, the adjuvant in the liquid carrier may include but is not limited to vegetable oils, alkyl esters of vegetable oils such as for example, soy methyl ester, soy ethyl ester, rapeseed oil methyl ester or rapeseed oil ethyl ester, alkoxylated sorbitan esters such as for example sorbitan monolaurate alkoxylates such as for example polyoxyethylene (16) sorbitan monolaurate (Tween™ 24), polyoxyethylene (20) sorbitan monolaurate (Tween™ 20; Alkamuls® PSML-20), polyoxyethylene (4) sorbitan monolaurate (Tween™ 21), polyoxyethylene (8) sorbitan monolaurate (Tween™ 22, polyoxyethylene (12) sorbitan monolaurate (Tween™ 23), sorbitan monolaurate (Alkamuls® S/20, Glycomul® LK, Glycomul® LC, Span® 20), polyoxyethylene (20) sorbitan monostearate alkoxylates such as for example polyoxyethylene (20) sorbitan monosterate (Tween™ 60), polyoxyethylen (4) sorbitan monostearate (Tween™ 61), sorbitan monostearate (Alkamuls® S/90, Glycomul® s, Span® 60), sorbitan monooleate alkoxylates such as for example polyoxyethylene (20) sorbitan monooleate (Tween™ 80), Emulgin® SMO 20, T-Maz® 80, Agnique® SMO 20U), polyoxyethylene (5) sorbitan monooleate (Tween™ 81), sorbitan monooleate (Alkamuls® S/80, Span® 80), and combinations thereof.
In a preferred embodiment, the adjuvant in the liquid carrier comprises tall oil fatty acids (TOFA) and/or soy methyl ester and/or sorbitan monolaurate alkoxylates such as polyoxyethylene (16) sorbitan monolaurate (Tween™ 24).
In an embodiment, the adjuvant is present in the amount of at least 10% of the total weight of all components in the formulation. In another embodiment, the adjuvant is present in the amount of at least 15% of the total weight of all components in the formulation. In a further embodiment, the adjuvant is present in the amount of at least 20% of the total weight of all components in the formulation. In yet another embodiment, the adjuvant is present in the amount of at least 30% of the total weight of all components in the formulation. In a specific embodiment, the total amount of adjuvant may be present in a concentration of about 17% by weight based upon the total weight of the composition. In another specific embodiment, the total amount of adjuvant may be present in a concentration of about 35% by weight based upon the total weight of the composition.
According to embodiments, the fungicidal oil liquid formulation further comprises at least one surfactant. The at least one surfactant may include but is not limited to alkyl sulfonates, alkyl benzene sulfonates, alkyl aryl sulfonates, alkylphenolalkoxylates, tristyryiphenol ethoxylates, natural or synthetic fatty ethoxylate alcohols, natural or synthetic fatty acid alkoxylates, natural or synthetic fatty alcohols alkoxylates, alkoxylated alcohols (such as n-butyl alcohol poly glycol ether), block copolymers (such as ethylene oxide-propylene oxide block copolymers and ethylene oxide-butylene oxide block copolymers) or combinations thereof.
In a preferred embodiment, the surfactant may include but is not limited to tristyrylphenol ethoxylates, alkyl benzene sulfonates and n-butyl alcohol poly glycol ether.
In an embodiment, the total amount of surfactants present in the formulation may be about 0.1-40 wt %, about 0.1-35 wt. %, or about 0.1-30 wt %, based on the total weight of the composition. In a further embodiment, the total amount of surfactants may be present in a concentration of about 1-40% by weight based upon the total weight of the composition. In another embodiment, the total amount of surfactants may be present in a concentration of about 10-40% by weight based upon the total weight of the composition. In yet another embodiment, the total amount of surfactants may be present in a concentration of about 15-25% by weight based upon the total weight of the composition. In a specific embodiment, the total amount of surfactants may be present in a concentration of about 24% by weight based upon the total weight of the composition. In another specific embodiment, the total amount of surfactants may be present in a concentration of about 9% by weight based upon the total weight of the composition.
In an embodiment, the total amount of surfactants selected from the group including but is not limited to tristyrylphenol ethoxylates, alkyl benzene sulfonates and n-butyl alcohol poly glycol ether may be present in a concentration of about 1-40% by weight based upon the total weight of the composition.
Other ingredients, such as adhesives, neutralizers, thickeners, binders, sequestrates, biocides, stabilizers, buffers preservatives, antioxidants or anti-freeze agents, may also be added, to the present compositions in order to increase the stability, density, and viscosity of the described compositions.
Further, the agricultural compositions herein may be used in conjunction with one or more other pesticides to control a wider variety of undesirable pests. When used in conjunction with other pesticides, the herein described composition maybe formulated with the other pesticide/s, tank mixed with the other pesticide/s or applied sequentially with the other pesticide/s. In addition, herein described composition may, optionally, be combined with or blended with other pesticide compositions. This blend of pesticide may be used to control pests in crops and non-crop environments.
In some embodiments, the agricultural compositions herein may be used in conjunction with one or more other adjuvants.
Methods of Use
The formulations described herein are suitable for the control of undesirable pests such as phytopathogenic fungi. Methods include adding the fungicidal oil liquid formulation to a carrier such as water and using the resulting solution containing the fungicidal formulation for spray applications to control phytopathogenic fungi in plant or propagation material thereof in crop or non-crop environments.
By diluting the fungicidal oil liquid formulation in water, a suspoemulsion may be formed.
Effective application rates of the pesticidal composition cannot generally be defined, as it varies depending upon various conditions such as the type of pesticide, target pest, weather conditions, nature of the soil, and the type of crop. In one embodiment, the fungicidal oil liquid formulation is generally applied at a rate of about 1 to about 5 L/ha. In a preferred embodiment the fungicidal oil liquid formulation is applied at a rate of about 2 to 3 L/ha. In a specific embodiment the fungicidal oil liquid formulation is applied at a rate of about 2 L/ha. In another specific embodiment the fungicidal oil liquid formulation is applied at a rate of about 3 L/ha. In another specific embodiment the fungicidal oil liquid formulation is applied at a rate of about 2.5 L/ha.
In an embodiment, the fungicidal oil liquid formulation may be diluted in a carrier such as water in an amount of from about 1 to 100 L of the fungicidal formulation per 1000 L of water. In a further embodiment, the composition may be diluted in a carrier such as water in an amount of from about 1 to 30 L of the fungicidal formulation per 1000 L of water. In yet another embodiment, the composition may be diluted in a carrier such as water in an amount of from about 5 to 15 L of the fungicidal formulation per 1000 L of water.
The methods of the present subject matter may be applied to any crop plants, including but not limited to soybean, cereals, wheat corn, papaya, melon, cacao and coffee.
In another embodiment, the phytopathogenic fungi are one or more of the classes including but not limited to soybean rust (Phakopsora pachyrhizie), target spot (Corynespora cassiicola), late season diseases (Septoria glycines and Cercospora kikuchii), Northern leaf blight (Exserohilum turcicum), yellow leaf spot (Dreshslera tritici-repentis), Phaeosphaeria leaf spot (Phaeosphaeria maydis), Anthracnose (Colletotrichum gloeosporioides), Cereal smuts, Common smut (Ustilago maydis), Head smut (Sphacelotheca reiliana), False smut (Ustilaginoidea virens), Flag smut (Usrocystis agropyri), Loose smut of wheat/barley (Ustilago nuda), Covered smut (Ustilago segetum var. hordei), and Semi-loose smut (Ustilago avenae).
the agricultural compositions herein may be mixed with water and/or fertilizers and may be applied to a desired locus by any means, such as airplane spray tanks, knapsack spray tanks, cattle dipping vats, farm equipment used in ground spraying (e.g., boom sprayers, hand sprayers), and the like. The desired locus may be soil, plants, and the like.
The agricultural compositions herein may be applied to soybeans from vegetative growth stage: V2 (Second trifoliolate—two sets of unfolded trifoliolate leaves) to reproductive growth stage R8 (Full maturity—95% of the pods have reached their full mature color).
The present composition may include additional crop protection agents, for example insecticides, herbicides, fungicides, bactericides, nematicides, molluscicides, growth regulators, biological agents, fertilizers, or mixtures thereof. When used in conjunction with additional crop protection agents, the composition can be formulated with these co-agents, tank mixed with the co-agents or applied sequentially with the co-agents.
Methods of Preparation
The present subject matter also extends to a process for obtaining fungicidal oil liquid formulation comprising the steps of:
In an embodiment, an adjuvant is optionally added in step (3). In another embodiment, a surfactant may also be added in step (2) and/or a non-aqueous liquid carrier may also be added in step (3).
A formulation was made according to following procedure:
Solvesso 200: (Heavy aromatic naphthalene), N,N-Dimethyldecanamide, TSP 16EO-Tristyrylphenol ethoxylates, and dodecylbenzene sulfonic acid, calcium salt were added to a vessel. Under agitation, picoxystrobin and tebuconazole were charged. While stirring, the mixture was heated to 70 to 75° C. Stirring was maintained until the picoxystrobin and tebuconazole were completely dissolved. The heat was turned off. While stirring, n-butyl alcohol polyglycol ether, and methyl soyate were added to the vessel. Mancozeb and micronized hexamethylenetetramine were then added to the mixture. The rate of stirring was increased to 800 RPM. The stirring was continued until a complete homogeneous formulation was achieved.
A formulation was made according to following procedure:
Solvesso 200 (Heavy aromatic naphthalene), N,N-Dimethyldecanamide, TSP 16EO-Tristyrylphenol ethoxylates, and dodecylbenzene sulfonic acid, calcium salt were added to a vessel. Under agitation, picoxystrobin and tebuconazole were charged. While stirring, the mixture was heated to 70 to 75° C. Stirring was maintained until the picoxystrobin and tebuconazole were completely dissolved. The heat was turned off.
While stirring, n-butyl alcohol polyglycol ether, methyl soyate and TOFA were added to the vessel. Mancozeb and micronized hexamethylenetetramine were then added to the mixture. The rate of stirring was increased to 800 RPM. The stirring was continued until a complete homogeneous formulation was achieved.
A formulation was made according to following procedure:
Solvesso 200 (Heavy aromatic naphthalene), Tween® 24, TSP 16EO-Tristyrylphenol ethoxylates, and dodecylbenzene sulfonic acid, calcium salt were added to a vessel. Under agitation, picoxystrobin and tebuconazole were charged. While stirring, the mixture was heated to 70 to 75° C. Stirring was maintained until the picoxystrobin and tebuconazole were completely dissolved. The heat was turned off. While stirring, ethopropoxylated alcohol, methyl soyate and TOFA were added to the vessel. Mancozeb, hexamethylenetetramine and an antifoam agent were then added to the mixture. The rate of stirring was increased to 800 RPM. The stirring was continued until a complete homogeneous formulation was achieved.
The formulation of Formula III appears as an opaque homogeneous yellow liquid.
Determination of Dynamic Viscosity
The dynamic viscosity of the formulation of Formula III was measured using a rotational viscometer LVT and spindle no63. The viscometer was adjusted to the right rotation (60 rpm) and reading was carried out after 30 seconds of rotation of the red pointer for viscometer stabilization. Two determinations of dynamic viscosity of the formulation were performed 1) at 20±0.2° C. and 2) at 40±0.2° C. Dynamic viscosity of the formulation at 20±0.2° C. was determined to be 1160 mPa·s and at 40±0.2° C. as 560 mPa·s.
Determination of Miscibility at 30° C.
The formulation of Formula III was added to three different solvents 1) standard water with a hardness of 20 ppm CaCO3; 2) acetone; and 3) ethanol. Each solution was prepared by transferring approximately 2 mL of the formulation into a 250 mL beaker and then diluted with 50 mL of solvent (water, acetone and ethanol). Each solution was mixed for 3 minutes and then transferred to a 100 mL graduated cylinder and its volume completed to 90 mL with the applicable solvent. The solutions were immersed in a bath at a controlled temperature of 30±1° C. After reaching thermal equilibrium, the cylinders were filled to a final volume of 100 mL with the applicable solvent. The cylinders were inverted 30 times, once every 2 seconds, returning to its original position. The solutions were immersed in a bath at a controlled temperature of 30±1° C. and after 1 hour at rest, the solutions were tested for homogeneity, with or without, separation of solid or liquid phases.
Under the above conditions, precipitation of less than 1% was noted for the standard water solutions; approximately 4% of precipitation was noted for the acetone solution; and approximately 6% of precipitation was noted for the ethanol solution. No liquid phase separation was noted for any of the solutions.
Stability Test
Approximately 50 ml of the OD formulation of Formula III were added to three glass vials. The vials were sealed with rubber stopper and an aluminum seal, one of these was kept at room temperature and the other two were kept in an oven at a temperature of 20±2° C. After 14 days of incubation the concentration of active ingredients were determined by liquid chromatography (HPLC) and gas chromatography (GC/FID), The study of thermal stability and the air follows the GLP procedure 50010/Rev. 04—Determination of Thermal Stability and Air. The percentage degradation was calculated by comparing the concentration of the active ingredients at both room temperature and at the elevated temperature.
According to the above test, there was only about a 2% degradation, of mancozeb, about a 0.2% degradation of picoxystrobin and about a 2.4% degradation of tebuconazole. As such the OD formulation of Formula III can be considered stable at room temperature as well as at higher temperatures (55° C.).
Once formulated, the OD formulation of Formula III produced by the method of the present subject matter would be expected to show stability on storage at temperatures ranging from −5° C. to 55° C. for up to 2 weeks and also stability at ambient temperature for up to 2 years.
The oil dispersion formulation of the subject matter has good stability over an extended period of time and also at elevated temperatures. These dispersions are easily pourable and dispersible into water.
Field Trial 1:
The formulation of Formula I was applied to a crop of soybean to determine its efficacy against soybean rust (Phakopsora pachyrhizie). The formulation was applied at a rate of 3 L/ha.
For comparison, the same disease was also treated with (i) a WG formulation of picoxystrobin+tebuconazole+mancozeb (40+40+600 g/Kg) at a rate of 2 Kg/ha.
Field Trial 2:
The formulation of Formula III was applied to a crop of wheat to determine its efficacy against yellow leaf spot (Drechslera tritici-repentis). At the time of application the pressure of the disease on the crop was considered to be high (high disease incidence). The formulation was applied at a rate of 3 L/ha.
For comparison, the same disease was also treated with (i) a WG formulation of picoxystrobin+tebuconazole+mancozeb (40+40+600 g/Kg) at a rate of 2 Kg/ha together with Nimbus® at a rate of 500 ml/ha; and (ii) the formulation of Formula III at a rate of 3 L/ha together with Nimbus® at a rate of 500 ml/ha.
Field Trials 3-5
In a series of three different field trial, the formulation of Formula III was applied to a crop of soybean to determine its efficacy against soybean rust (Phakopsora pachyrhizie). The formulation was applied at a rate of 2.5 L/ha (67.5 g of picoxy+82.5 g of tebuco+1000 g of MZB).
For comparison, the same disease was also treated with (i) a WG formulation of picoxystrobin+tebuconazole+mancozeb (40+40+600 g/Kg) at a rate of 2 Kg/ha.
For field trials 1-5, the efficacy of the OD formulation was calculated using Abbott's formula as defined by Abbott in an article entitled “A method of computing the effectiveness of an insecticide” published in the Journal of Economic Entomology, 1925, vol. 18, p. 265-267, incorporated herein by reference in its entirety. The efficacy of a fungicidal treatment may be calculated as follows:
in which X represents disease severity of the control (non-treated crop) and Y represents disease severity of the treated crop.
EC50 Comparison:
The EC50 of the OD formulation of Formula III was compared with the EC50 of the WG formulation. Soybean leaves infected with Phakopsora pachyrhizie were treated with one of the OD or WG formulations. The EC50 for the OD formulation was 4.3 ppm and the EC50 for the WG formulation was 15.5 ppm. EC50 is defined as the dose that provides 50% inhibition of a fungal isolate as compared to a non-fungicide-amended control. The lower the EC50 value the more effective the fungicide or fungicidal formulation.
Conclusions:
As can be seen above, the formulation of the present subject matter performs the same if not better than the equivalent WG formulation comprising the same active ingredients. By showing higher levels of efficacy, at lower concentrations of active ingredients the OD formulation shows to be superior over the WG formulation.
A formulation was made according to following procedure:
Solvesso 200 (Heavy aromatic naphthalene), Tween® 24, TSP 16EO-Tristyrylphenol ethoxylates, dodecylbenzene sulfonic acid, calcium salt, acetophenone and TOFA were added to a vessel. Under agitation (300-400 rpm), prothioconazole was charged. While stirring, the mixture was heated to 70 to 75° C. Stirring was maintained until the prothioconazole was completely dissolved. The heat was turned off. While stirring, methyl soyate and silicone oil were added to the vessel. Mancozeb was then added to the mixture. The rate of stirring was increased to 800 RPM. The stirring was continued until a complete homogeneous formulation was achieved.
The EC50 of the OD formulation of Formula IV was compared with the EC50 of a tank mixture comprising prothioconazole and mancozeb. Soybean leaves infected with Phakopsora pachyrhizie were treated with either the mixture or the OD formulation. The EC50 for the OD formulation was 17.2 ppm and the EC50 for the tank mixture was 19.4 ppm.
As described above, in the fungicidal oil liquid formulation has significant advantages over the mixtures and formulations which are known in the art. The formulation is physically stable and easy to use in the fields.
In order to show that the fungicidal oil liquid formulation performs at least as well as mixtures and formulations known in the art, the formulation may be applied to a crop such as soybean. Its control against diseases such as soybean rust may be determined by methods known in the art. The formulation may be applied at multiple application rates and/or multiple applications may be applied.
While the present subject matter has been shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that many alternatives, modifications and variations may be made thereto without departing from the spirit and scope thereof. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the spirit and broad scope of the appended claims.
All publications, patents and patent applications mentioned in this specification are herein incorporated in their entirety by reference into the specification, to the same extent as if each individual publication, patent or patent application was specifically and individually indicated to be incorporated herein by reference.
This application is a $371 national stage of PCT International Application No. PCT/IL2017/050576, filed May 24, 2017, claiming priority of U.S. Provisional Application Nos. 62/456,175, filed Feb. 8, 2017, and 62/340,610, filed May 24, 2016, the contents of each of which are hereby incorporated by reference into the application.
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| Number | Date | Country | |
|---|---|---|---|
| 20190150430 A1 | May 2019 | US |
| Number | Date | Country | |
|---|---|---|---|
| 62456175 | Feb 2017 | US | |
| 62340610 | May 2016 | US |
