CN116889230A - Weeding composition - Google Patents

Weeding composition Download PDF

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Publication number
CN116889230A
CN116889230A CN202310913713.6A CN202310913713A CN116889230A CN 116889230 A CN116889230 A CN 116889230A CN 202310913713 A CN202310913713 A CN 202310913713A CN 116889230 A CN116889230 A CN 116889230A
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CN
China
Prior art keywords
weeds
germination
herbicidal composition
growth
mefenacet
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CN202310913713.6A
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Chinese (zh)
Inventor
罗昌炎
詹姆斯·T·布里斯托
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Jiangsu Rotam Chemical Co Ltd
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Jiangsu Rotam Chemical Co Ltd
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Priority to CN202310913713.6A priority Critical patent/CN116889230A/en
Publication of CN116889230A publication Critical patent/CN116889230A/en
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    • 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
    • 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
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
    • A01N43/84—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms six-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,4
    • 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

Abstract

The application relates to a weeding composition, which comprises an active component (A) of flumioxazin and an active component (B) of one or more of oxaziclomefone, oxadiargyl, fenbuconazole, triazoxamide, simetryn, gramineralfate, bentazone, tetrazole oxadiazon, pyraclonil and halosulfuron-methyl, wherein the weight ratio of the active component (A) to the active component (B) is 100:1-1:100. The application also relates to the use of said herbicidal composition for controlling the germination or growth of weeds in useful plants; the useful plant is selected from wheat, barley, rye, triticale, oat, corn, rice, soybean, peanut, oilseed rape, kala, potato, sugar beet, sugarcane, cotton, flax, sorghum, pasture, turf; is especially suitable for controlling the germination or growth of weeds in rice crops.

Description

Weeding composition
The application is a divisional application with the patent number of 202210015128X and the patent name of 'a weeding composition' applied by the applicant in 2019, 12 and 4 days.
Technical Field
The application relates to a weeding composition, belonging to the field of crop protection; the weeding composition is particularly suitable for preventing and controlling weeds in soybean, corn, peanut, cotton, sugarcane, potato and rice fields.
Background
Long-term use of herbicides results in a change in sensitivity of the herbicide to weeds. Improving the control of resistant or resistant weed species by increasing the application rate of the herbicide is often unsatisfactory. The operation of increasing the application rate of the herbicide reduces the selectivity of the herbicide or does not improve the herbicidal effect even at higher application rates.
Thus, in weed control, there is a need for herbicides with better overall selectivity for weeds; the same or better control effect is obtained under the condition of less application dosage; reducing emissions of active compounds into the environment to avoid, for example, leaching and residual effects; the combination of rapid action and long-acting action avoids multiple administrations.
Flumioxazin (Flumioxazin) is described in EP170191C, which has the structural formula I. Flumioxazin is not satisfactory in all respects in terms of its herbicidal properties.
Disclosure of Invention
The present application aims to address the above-mentioned shortcomings by providing a herbicidal composition which solves at least one of the problems such as improving biological properties, providing synergistic properties, lowering dosage rates, expanding the herbicidal spectrum, combining fast and long acting effects, resistance management to delay resistance.
The application provides a weeding composition which comprises an active component (A) of flumioxazin and an active component (B) of one or more of oxaziclomefone, oxadiargyl, fenbuconazole, triazoxamide, simetryn, gramineralocorticoid, mefenacet, metamifop, pyrazosulfuron-ethyl, wherein the weight ratio of the active component (A) to the active component (B) is 100:1-1:100.
The active component (B) is selected from oxazin; the weight ratio of the flumioxazin to the oxazin is 50:1-1:50, preferably 25:1-1:25; more preferably 10:1 to 1:10; more preferably 5:1 to 1:5.
The active component (B) is selected from oxadiargyl; the weight ratio of the flumioxazin to the oxadiargyl is 10:1-1:50, preferably 5:1-1:50; more preferably 5:1 to 1:30; more preferably 5:1 to 1:25, and still more preferably 5:1 to 1:15.
The active component (B) is selected from the group consisting of cyclopentaoxadiazon; the weight ratio of the flumioxazin to the cyclopentaoxadiazon is 10:1-1:50, preferably 5:1-1:50; more preferably 5:1 to 1:50; more preferably 5:1 to 1:25.
The active component (B) is selected from triazoxamide; the weight ratio of the flumioxazin to the triazoxamide is 5:1-1:50, preferably 5:1-1:25; more preferably 5:1 to 1:10.
The active component (B) is selected from the moxazin; the weight ratio of the flumioxazin to the simetryn is 1:1-1:100, preferably 1:5-1:50; more preferably 1:5 to 1:30; more preferably 1:5 to 1:20.
The active component (B) is selected from graminium; the weight ratio of the flumioxazin to the gramineous is 1:1-1:100, preferably 1:5-1:100; more preferably 1:10 to 1:80; more preferably 1:10 to 1:60, and still more preferably 1:10 to 1:50.
The active component (B) is selected from benthiavalicarb isopropyl; the weight ratio of the flumioxazin to the mefenacet is 1:1-1:100, and preferably 1:5-1:100; more preferably 1:10 to 1:80; more preferably 1:10 to 1:50, and still more preferably 1:10 to 1:35.
The active component (B) is selected from the group consisting of metamifop; the weight ratio of the flumioxazin to the metamifop is 1:1-1:50, preferably 1:5-1:40; more preferably 1:5 to 1:30; more preferably 1:5 to 1:25.
The active component (B) is selected from the group consisting of pyraclonil; the weight ratio of the flumioxazin to the pyraclonil is 1:1-1:100, preferably 1:1-1:50; more preferably 1:1 to 1:30.
The active component (B) is selected from bicyclosultone; the weight ratio of the flumioxazin to the bicyclosultone is 1:1-1:80, preferably 1:5-1:50; more preferably 1:5 to 1:30; more preferably 1:5 to 1:20.
The active component (B) is selected from metazosulfuron; the weight ratio of the flumioxazin to the metazosulfuron is 20:1-1:20, and the preferable weight ratio is 10:1-1:10; more preferably 5:1 to 1:10; more preferably 5:1 to 1:5.
The present application has unexpectedly found that flumioxazin in combination with oxaziclomefone, oxadiargyl, oxadiazon, triazoxamide, simetryn, graminerally, mefenacet, tetrazolyl oxadiazon, pyraclonil, bicyclosultone, metazosulfuron act together in a particularly advantageous manner.
The simultaneous application of the active components (a) and (B) or the sequential application of the active components (a) and (B) gives an enhanced weed control effect compared to the possible control rates of the individual compounds, which unexpected effect is a true synergistic effect and not just a summation of the activities.
Thus, the herbicidal compositions of the present application significantly reduce the application concentration of each individual compound. But also has longer control time for weeds.
Firstly, in the herbicidal composition of the present application, the application rate of a single compound is reduced while maintaining a good level of action; second, the herbicidal composition of the present application achieves a high level of control of weeds when a single compound becomes ineffective from an agronomic perspective in a low application rate range.
The herbicidal composition of the present application remarkably broadens the spectrum of control of weeds by the compound. The combination of the application not only maintains excellent control of weeds in useful plants, but also allows greater flexibility in succeeding crops.
The herbicidal composition of the present application exhibits an effective weed control effect on both dry land weeds and paddy field weeds. Thus, the herbicidal compositions are useful for weed control in useful plants such as wheat, barley, rye, triticale, oat, corn, peanut, soybean, cotton, sugarcane, potato, rice crops or plantations such as citrus orchards, vineyards.
Accordingly, the present application provides the use of the herbicidal composition in controlling the germination or growth of weeds in useful plants; the useful plants are selected from wheat, barley, rye, triticale, oat, corn, peanut, soybean, cotton, sugarcane, potato, rice crops, citrus, and grape.
Particularly preferred useful plants of the application are corn, soybean, peanut, sugarcane, cotton, rice; rice crops are particularly preferred.
The herbicidal compositions of the present application can be used to control a wide variety of agro-economically important weeds, such as:
grass weeds, such as, for example, myrtus (Alopecurus species), poa (Poa-specs), agarum (Apera-specs), avena (Avena spec), lolium (Lolium-specs), bromus (Bromus-specs), barnyard (Echinochloa spec.), stephania (Leptosphaera spec.), crabgrass (Digitaria spec.), green bristlegrass (Setaria spec), brachypodium (Brachiaria spec), and duckbill (Ischeamp spec);
the weeds in the broad-leaved family, such as galium spp, wild sesame spp, geranium spp, solanum spp, veronica, viola spp (e.g., pansy (violet tricolor)), collyrium (Alchemilla spp.), kochia spp, chickweed (Stellaria spp), polygonum (Polygonum spp), matrimony (Matricaria spp), chenopodium spp, amaranthus (Amaranthus spp), bovine Teng Ju (Galinsoga spp), sedum (monochloria spp), matrimony (Lindernia spp), chamomile (antemias spp), and the like white mustard (Sinapis spp.), radish (Raphanus spp.), poppy (Papaver spp.), shepherd's purse (Capsella spp.), festival dish (Rotala spp.), iris spp), japanese velvet leaf (Limnocharis spp), cusp spp, dayflower spp, syzygium Ludwigia spp, clover needle (Bidens pilosa), chickpea spp; the combination also controls annual and perennial sedge, e.g., guan grass (Scirpus spp.) (e.g., fluorescent iris (Scirpus juncoides)), arrowhead (Sagittaria spp.), cyperus spp.), and waffle grass (Fimbristylis spp.).
The herbicidal compositions of the present application are particularly suitable for controlling weeds in fields of useful plants, for example:
examples of weeds include physalis (Alopecurus Species), poa (Poa-specs), alaca (Apera-specs), avena (Avena spec)), lolium (Lolium-specs), bromus (Bromus-specs), fumaria spec, not-forget-grass (myotis spec), galium (galium spec.), geranium (gerbera spec) (e.g., geranium rotundifolium), veronica (Veronica spec), viola (Viola spec) (e.g., tricolor), wild sesame (Lamium spec), zoysia (jig spec), polygonum (polygo spec), aesculum (plumula spec), alpina (alpina spec), and alpina (kohlrabi spec), and flavedodes (kohlrabi spec), and the genus of the genus alpina (phospho spec);
rice plants-examples of which weeds include barnyard grass (Echinochloa spp.), stephania Leptochloa spp.), crabgrass (Digitaria spp.), setaria (Setaria spp.), brachympathica (Brachiaria spp.), and duckbill spp.), yujingsha (Ischeamum spp.), yujinghua (Monochoria spp.), masterbatch (Lindernia spp.), syzygium aromaticum (Ludwigia spp.), ditch chickweed (Elatine spp.), scirpus (Scirpus spp.), for example, rush (Scirpus juncoides)), cyperus spp.), flower rush (Butomus spp.), festival spp (Rotaa spp.), commelina spp, japanese grass spp (Lepidium spp.), and Filipendula spp;
examples of weeds include Echinochloa spp, digitaria spp, setaria spp, cyperus spp, kochia spp, matricaria spp, chenopodium spp, solanum spp, polygonum spp, amaranthus spp, and Amaranthus spp; and sugarcane-examples of which weeds include Echinochloa spp, digitaria spp, setaria spp, brachypodium spp, kochia spp, amaranthus spp.
In particular, the herbicidal composition of the present application is particularly suitable for controlling the germination or growth of undesired weeds in rice fields:
barnyard grass (Echinochloa crusgalli), ear She Shuixian (Ammannia arenaria h.b.k.), heterotypic sedge (Cyperus difformis l.), scirpus platyphylla (Scirpus planiculmis Schmidt), kohlrabi (Linderniaprocumbens Philcox), sparganium rotundus (Cyperus rotundus l.), alisma (Alisma taceae), sagittaria (Sagittaria trifolia), sesbania (sesbania ex altata), buttercup (Commelina diffusa), glossopus arvensis (Monochoria vaginalis), festival grass (Equisetum ramosissimum Desf), dayflower (Herba comrinae), strand of water bamboo (mlrdania angustifolia), corm (Heleocharisplantagineiformis Tang et Wang), sun-dried fimbriae (Fimbristylis miliacea (l.) Vahl), garrulate sedge (cyclopera iria l.), japanese rush (Scirpus juncoides Roxburgh), stephania (leptochlogosis) and snakehead (Eclipta prostrata (l.).
The use of the herbicidal composition of the present application is not limited to control of these weeds as described above, but may be used for control of other weeds.
The present application also provides a method of controlling germination or growth of weeds, comprising: (i) prior to germination of the weeds; (ii) after germination of the weeds; or (iii) applying a herbicidally effective amount of the herbicidal composition containing the active components (a) and (B) to the weeds or the locus thereof at the time of (i) and (ii).
The present application also provides a method for controlling the germination or growth of weeds, comprising contacting the weeds, or the locus thereof, with a herbicidally effective amount of said herbicidal composition. A herbicidally effective amount refers to the amount of the herbicidally active ingredient applied to control weeds.
The application also provides a method for controlling the germination or growth of weeds, and the weeding composition is applied to soil to control the germination or growth of weeds.
A method of controlling the germination or growth of weeds, applying the herbicidal composition of the present application to weeds to control the germination or growth of weeds.
A method for controlling undesired sprouting or growth, comprising applying the active components (a) and (B) in the herbicidal composition of the present application to weeds or a locus thereof, together or separately, so as to control sprouting or growth thereof.
A method for controlling weeds, wherein the active components (A) and (B) in the herbicidal composition of the present application are applied to the soil before germination of weeds, the foliage after germination of weeds, or both together or separately to control the germination or growth of weeds.
The term "weeds" are those plants which affect the growth and quality of useful crop plants. Including grassy weeds and broadleaf weeds.
If the herbicidal composition of the present application is applied to the soil surface before the germination of weeds, the germination of weed seedlings is completely prevented, or weeds grow to the cotyledon stage, but then they stop growing, and eventually die completely after two to four weeks.
If the herbicidal composition is applied to the green parts of weeds after germination of the weeds, the growth is also stopped sharply in a relatively short time after the treatment, and the weed plants remain in the growing period at the point of application time, or they die completely after a certain time, in such a way that competition by weeds harmful to the useful plants is eliminated early and continuously.
Although the active components (a) and (B) have already shown good or even sufficient selectivity in a large number of crops, in principle, phytotoxicity to the crop plants may occur in some crops, in particular also when mixed with other less selective herbicides. Compositions comprising a herbicidal composition according to the application and one or more safeners are therefore particularly advantageous. The safener is used in an detoxically effective amount, for example in economically important crops or in fruit tree plantations (plantation crops) to reduce the phytotoxic side effects of the herbicide used. For example wheat, barley, rye, triticale, oats, corn, peanuts, soybeans, cotton, sugarcane, potatoes, rice crops or in plantations such as citrus orchards, vineyards.
The herbicidal compositions of the present application may be applied in a conventional manner by using techniques well known to those skilled in the art. Application methods include, but are not limited to, application to weeds or their locus of growth, for example to areas adjacent to plants, as well as pre-emergence, post-emergence, foliar (spread, directional, ribbon, spot, mechanical, jump-top, or recuperate), and application methods by hand, backpack, machinery, tractor, or air (aircraft, helicopter, drone).
A method of controlling weeds, comprising adding the herbicidal composition of the present application to irrigation water, and applying the composition to the weeds or the locus thereof by using a ground or aerial duster, sprayer, granule spreader.
The type of application depends in a well known manner on the intended purpose; in any case, this technique should ensure the best possible distribution of the active ingredient in the herbicidal composition according to the application.
The application rate can vary within a wide range and depends on the soil properties, the application method (pre-emergence or post-emergence, etc.), the crop plant, the weeds to be controlled, the prevailing climatic conditions and other factors controlled by the application method, the application time and the target crop. The active ingredients of the herbicidal compositions according to the application can generally be applied in amounts of from 1 to 2000g/ha, preferably from 10 to 100 g/ha.
The herbicidal compositions of the present application may be formulated in conventional formulation forms. The preparation forms of the composition can be emulsifiable concentrates, aqueous suspending agents, oil suspending agents, seed treatment dry powder agents, seed treatment suspending agents, water dispersible granules, wettable powder agents, suspending emulsion agents, aerosol agents, coated granules, extrusion granules, aqueous emulsion agents, microcapsule suspending agents, dry suspending agents, ultra-low volume liquid agents, electrostatic oil agents, gels, granules and microparticles.
The formulations according to the application can be prepared by mixing the active components (A) and (B) together with liquid diluents and/or solid diluents and, if desired, surfactants such as emulsifiers and/or dispersants and/or foaming agents.
Suitable liquid diluents include water or organic solvents. Such as toluene, xylene, cyclohexane, mineral oil, vegetable oil, butanol, ethylene glycol, methyl ethyl ketone, methyl isobutyl ketone, dimethylformamide, dimethyl sulfoxide, water, and the like.
Suitable solid diluents are diatomaceous earth, magnesium aluminum silicate, activated clay, kaolin, clay, gypsum, bentonite, white carbon, light calcium carbonate, limestone, wood chips, corn starch, soluble starch, and the like.
Suitable emulsifiers may be anionic and/or non-ionic emulsifiers such as alkylphenol ethoxylates, alkylphenol ethoxylates polyoxypropylene ethers, benzyl phenol ethoxylates, polyoxyethylene fatty acid esters, polyoxyethylene fatty alcohol ethers, polyoxyethylene fatty amines, alkylphenol polyglycol ethers and the like.
Suitable dispersants may be alkyl naphthalene sulfonates, bis (alkyl) naphthalene sulfonate formaldehyde condensates, alkylphenol polyoxyethylene phosphates, alkylphenol polyoxyethylene ether formaldehyde condensate sulfates, alkylphenol polyoxyethylene ether phosphates, alkylphenol polyoxyethylene ethers, castor oil ethylene oxide adducts, ethylene oxide-propylene oxide block copolymers, alkylphenol polyoxyethylene ether formaldehyde condensates, octylphenol polyoxyethylene ether sulfates and methylcellulose. For example, sodium lignin sulfonate, calcium lignin sulfonate, sodium methyl naphthalene sulfonate formaldehyde condensate, sodium methylene naphthalene sulfonate, etc.
The preferable preparation form of the application can be wettable powder, emulsifiable concentrate, suspending agent, oil suspending agent, microcapsule, microemulsion, aqueous emulsion, suspension emulsion, water dispersible granule, microcapsule suspension-suspending agent and ultra-low volume liquid.
For water dispersible granules, the person skilled in the art is familiar with using the corresponding auxiliary agents to complete the application. The dispersant is selected from polycarboxylate, lignosulfonate, alkyl naphthalene sulfonate, alkylphenol polyoxyethylene, ethylene oxide/propylene oxide block polyether; the wetting agent is selected from alkyl sulfate, alkyl sulfonate, naphthalene sulfonate, sodium lignin sulfonate, fatty alcohol polyoxyethylene ether and alkylphenol polyoxyethylene ether; the disintegrating agent is selected from ammonium sulfate, sodium chloride, ammonium chloride, urea, sucrose, glucose, carboxymethyl cellulose, soluble starch, and polyvinylpyrrolidone; the binder is selected from polyvinyl alcohol, soluble starch, dextrin, xanthan gum, carboxymethyl (ethyl) cellulose; the filler is selected from diatomite, kaolin, white carbon black, light calcium carbonate, talcum powder, attapulgite and clay.
For wettable powders, the adjuvants which can be used are: the dispersant is selected from polycarboxylate, lignosulfonate and alkyl naphthalene sulfonate; the wetting agent is selected from alkyl sulfate, alkyl sulfonate and naphthalene sulfonate; the filler is selected from ammonium sulfate, urea, sucrose, glucose, diatomite, kaolin, white carbon black, light calcium carbonate, talcum powder, attapulgite and clay.
For suspending agents, adjuvants which may be used are: the dispersant is selected from polycarboxylate, lignosulfonate and alkyl naphthalene sulfonate; the emulsifier is selected from alkylphenol formaldehyde resin polyoxyethylene ether, sorbitan monostearate polyoxyethylene ether and phenethyl phenol polyoxyethylene polyoxypropylene ether; the wetting agent is selected from alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethyl phenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonate and naphthalene sulfonate; the thickener is selected from xanthan gum, polyvinyl alcohol, bentonite, and magnesium aluminum silicate; the preservative is selected from formaldehyde, benzoic acid, and sodium benzoate; the defoaming agent is an organosilicon defoaming agent; the antifreezing agent is selected from ethylene glycol, propylene glycol, glycerol, urea, and inorganic salts (such as sodium chloride).
For dispersible oil suspensions, adjuvants which may be used are: the dispersing agent is selected from polycarboxylate, lignosulfonate, alkyl naphthalene sulfonate, castor oil polyoxyethylene ether, alkylphenol formaldehyde polyoxyethylene ether, sorbitan monostearate polyoxyethylene ether and phenethyl phenol polyoxyethylene polyoxypropylene ether; the wetting agent is selected from alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethyl phenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonate and naphthalene sulfonate; the thickener is selected from white carbon black, polyvinyl alcohol, bentonite and magnesium aluminum silicate; the antifreezing agent is selected from ethylene glycol, propylene glycol, glycerol, urea, and inorganic salts (such as sodium chloride); the stabilizer is selected from epoxidized soybean oil, epichlorohydrin and triphenyl phosphate; the dispersion medium is selected from soybean oil, rapeseed oil, corn oil, methyl oleate, diesel oil, engine oil, and mineral oil.
The formulations according to the application contain active components (a) and (B) which together constitute from 1% to 90%, preferably from 5% to 80%, more preferably from 5% to 70%, still more preferably from 10% to 60% by weight of the herbicidal composition.
Other additional components, such as protective colloids, binders, adhesives, thickeners, antifreezes, defoamers, thixotropic agents, penetrants, stabilizers, masking agents, sequestering agents, complex forming agents may also be present if appropriate in the herbicidal compositions according to the application. In general, the active component may be combined with any solid or liquid additive conventionally used for formulation purposes.
Suitable thickeners are polysaccharides (e.g. xanthan gum, carboxymethyl cellulose), inorganic clays (organically modified or unmodified), polycarboxylates and silicates.
Suitable antifreeze agents are ethylene glycol, propylene glycol, urea and glycerol.
Suitable defoamers are polysiloxanes, long-chain alcohols and fatty acid salts.
Suitable binders are polyvinylpyrrolidone, polyvinyl acetate, polyvinyl alcohol, polyacrylates and cellulose ethers.
Depending on the nature of the formulation, the application method may be selected according to the intended subject and prevailing circumstances, such as foliar, saturation, spraying, dusting, scattering.
When used, the formulations may be in commercial form, diluted as desired in conventional manner, for example by dilution with water, of wettable powders, emulsifiable concentrates, dispersions and water dispersible granules. For formulations of the powder, soil application granule, broadcast granule and spray solution type, it is common to dispense with dilution with other inert substances prior to use.
The herbicidal compositions of the present application may also comprise various active compounds of other components, for example selected from fungicides, insecticides, acaricides, nematicides, bird repellents, soil conditioners, and plant growth regulators.
The synergistic effect of the present application allows for reduced application rates of individual herbicides, greater effectiveness at the same application rate, control of non-controlled varieties, control of varieties that are tolerant or resistant to the individual herbicide or herbicides, extended application periods and/or reduced individual application times required; and a weed control system which is more economically and ecologically advantageous to the user is obtained.
Detailed Description
Biological test case
The method comprises the following steps:
the stock solutions of the single agents are prepared by dissolving flumioxazin and active component (B) in the table respectively with acetone, and then diluted to the required concentration with an aqueous solution containing 0.1% of Tween-80.
The weed seeds to be measured are respectively dry sown in plastic pots with the diameter of 20cm, and covered with soil for 1cm. The next day, the prepared medicament to be tested is uniformly applied to the surface of soil by adopting a DeVries, SB6-202 walking spray tower, and water comparison is carried out; each treatment was repeated 3 times. And (3) airing the test material in a ventilation place for 2-3h naturally, wherein the test material leaves are not required to be sprayed in the 3d after the test material is treated, water is supplied in an infiltrating irrigation mode, and the test material is placed in a greenhouse for management. And after 21d, weighing the fresh weight of the overground part, and respectively calculating the fresh weight control effect.
Fresh weight control (%) = (fresh weight of control weed-fresh weight of drug treated weed)/fresh weight of control weed x 100
The intended effect of a particular combination of two active compounds may be achieved using the so-called "Colby formula" (see S.R. Colby, "Calculating Synergistic and Antagonistic Responses of HerbicideCombinations", wells 1967,15, 20-22)
The expected value for Colby is calculated by the following formula:
x is the controlling effect of the active component (A) when the dosage is mg/ha or the concentration is mppm;
y is the control effect of the active ingredient (B) at a dose of ng/ha or at a concentration of nppm;
e is the expected value for the active ingredient (A) and the active ingredient (B) at doses of m and ng/ha or at concentrations of m and nppm;
when the actual weed control tested is greater than the control expected according to the Colby formula, then the mixture is super-additive, i.e., has a synergistic effect.
TABLE 1 control of barnyard grass
TABLE 2 control of heterotypic Cyperus rotundus
TABLE 3 control of Qianjin
TABLE 4 control effect on snakehead intestines
The test results show that the weeding effect of the combination of the flumioxazin and the active component (B) is obviously better than that of the flumioxazin and the active component (B) which are independently applied, and the flumioxazin and the active component (B) have obvious gain effect.

Claims (13)

1. The weeding composition is characterized by comprising an active component (A) flumioxazin and an active component (B) mefenacet, wherein the weight ratio of the active component (A) to the active component (B) is 100:1-1:100.
2. The herbicidal composition of claim 1 wherein the active ingredient (B) is selected from mefenacet and the weight ratio of flumioxazin to mefenacet is 1:1-1:100.
3. The herbicidal composition of claim 11 wherein the active ingredient (B) is selected from mefenacet and the weight ratio of flumioxazin to mefenacet is 1:5-1:100.
4. The herbicidal composition of claim 11 wherein the active ingredient (B) is selected from mefenacet and the weight ratio of flumioxazin to mefenacet is 1:10-1:80.
5. The herbicidal composition of claim 11 wherein the active ingredient (B) is selected from mefenacet and the weight ratio of flumioxazin to mefenacet is 1:10-1:50.
6. The herbicidal composition of claim 11 wherein the active ingredient (B) is selected from mefenacet and the weight ratio of flumioxazin to mefenacet is 1:10-1:35.
7. The herbicidal composition of claim 1, wherein the herbicidal composition is formulated as wettable powders, emulsifiable concentrates, suspensions, oil suspensions, microcapsules, microemulsions, emulsions in water, suspoemulsions, water dispersible granules, microencapsulated suspension-suspensions, ultra low volume liquids.
8. Use of the herbicidal composition of claim 1 for controlling the germination or growth of weeds in a useful plant selected from the group consisting of wheat, barley, rye, triticale, oat, corn, peanut, soybean, cotton, sugarcane, potato, rice, citrus, grape.
9. Use of the herbicidal composition of claim 1 for controlling the germination or growth of weeds in rice, soybean, maize, cotton, peanut crops.
10. A method of controlling germination or growth of weeds, comprising: (i) prior to germination of the weeds; (ii) after germination of the weeds; or (iii) applying a herbicidally effective amount of the herbicidal composition of claim 1 to the weeds or the locus thereof at the time of (i) and (ii).
11. A method of controlling the germination or growth of weeds, characterized in that the herbicidal composition of claim 1 is applied to soil to control the germination or growth of weeds.
12. A method for controlling the germination or growth of weeds, characterized in that the herbicidal composition of claim 1 is applied to the weeds or their locus so as to control the germination or growth of the weeds.
13. A method for controlling the germination or growth of weeds, characterized in that the herbicidal composition of claim 1 is applied to the soil before germination of weeds, the foliage after germination of weeds to control the germination or growth of weeds.
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