CN112931522A - Weeding composition - Google Patents

Weeding composition Download PDF

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Publication number
CN112931522A
CN112931522A CN201911260272.4A CN201911260272A CN112931522A CN 112931522 A CN112931522 A CN 112931522A CN 201911260272 A CN201911260272 A CN 201911260272A CN 112931522 A CN112931522 A CN 112931522A
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China
Prior art keywords
weeds
germination
herbicidal composition
growth
spp
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CN201911260272.4A
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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 CN201911260272.4A priority Critical patent/CN112931522A/en
Priority to CN202310519276.XA priority patent/CN116508772A/en
Priority to CN202310519279.3A priority patent/CN116508773A/en
Priority to CN202310519284.4A priority patent/CN116508774A/en
Publication of CN112931522A publication Critical patent/CN112931522A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • A01N33/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds
    • A01N33/16—Biocides, pest repellants or attractants, or plant growth regulators containing organic nitrogen compounds containing nitrogen-to-oxygen bonds
    • A01N33/18—Nitro compounds
    • 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<
    • A01N47/30—Derivatives containing the group >N—CO—N aryl or >N—CS—N—aryl
    • 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

A weeding composition contains active components (A) flumioxazin, (B) diuron and (C) one of pendimethalin, oxadiazon or flufenacet. The weight ratio of the active component (A), the active component (B) and the active component (C) is 1-10: 1-100: 1 to 100. The invention also relates to the use of said herbicidal composition for controlling the germination or growth of weeds in crops of useful plants; the useful crop is selected from wheat, barley, rye, triticale, oat, corn, rice, soybean, peanut, oilseed rape, kala, potato, sugar beet, sugarcane, cotton, flax, sorghum, pasture grass, lawn; particularly useful for controlling the germination or growth of weeds in cotton crops.

Description

Weeding composition
Technical Field
The invention relates to a weeding composition, belonging to the field of crop protection; the weeding composition is particularly suitable for preventing and controlling weeds in soybeans, corns, peanuts, cotton, sugarcanes, potatoes and paddy fields.
Background
The long-term use of herbicides results in a change in the sensitivity of the herbicide to weeds. Improving the control of tolerant or resistant weed species by increasing the application rate of the herbicide is often unsatisfactory. Increasing the application rate of the herbicide reduces the selectivity of the herbicide, or the herbicidal effect is not improved 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 the emission of active compounds into the environment, to avoid leaching and residual effects, for example; combines the rapid action with the long-acting action, and avoids multiple application.
Flumioxazin (Flumioxazin) is described in EP170191C and has the formula I. Flumioxazin is not satisfactory in all respects for its herbicidal properties.
Figure 990591DEST_PATH_IMAGE001
Formula I
Disclosure of Invention
The present invention has been made in view of the above-mentioned disadvantages, and it is an object of the present invention to provide a herbicidal composition which solves at least one of the problems such as improvement of biological properties, provision of synergistic properties, reduction of dosage rate, enlargement of herbicidal spectrum, combination of rapid action and long-lasting action, and management of resistance to delay resistance.
The invention provides a weeding composition containing active components
(A) Flumioxazin
And
(B) diuron (D)
And
(C) one of pendimethalin, oxadiazon or flufenacet.
In the herbicidal composition according to the present invention, the weight ratio of the active ingredients is present in such a proportion that a synergistic effect is obtained.
Wherein the weight ratio of the active component (A), the active component (B) and the active component (C) is 1-10: 1-100: 1 to 100.
Further, the weight ratio of the active component (A), the active component (B) and the active component (C) is 1-10: 1-50.
Furthermore, the weight ratio of the active component (A), the active component (B) and the active component (C) is 1-10: 1-20.
Furthermore, the weight ratio of the active component (A), the active component (B) and the active component (C) is 1-5: 1-20.
Furthermore, the weight ratio of the active component (A), the active component (B) and the active component (C) is 1-5: 5-20.
It has now been found that, surprisingly, the combination of active ingredient (a), active ingredient (B) and active ingredient (C) act together in a particularly advantageous manner.
The simultaneous application of active ingredients (a), (B) and (C) or the sequential application of active ingredients (a), (B) and (C) gives an enhanced weed control effect compared to the control rate possible with the individual compounds, the unexpected effect being a true synergistic effect, not just a sum of the activities.
Thus, the herbicidal compositions of the present invention significantly reduce the applied concentration of each individual compound. But also has longer control time on weeds.
Firstly, in the herbicidal compositions of the invention, the application rate of the individual compounds is reduced while still maintaining a good level of action; secondly, the herbicidal compositions of the present invention achieve a high level of control of weeds when the individual compounds become ineffective from an agronomic standpoint at low application rates.
The weeding composition provided by the invention remarkably widens the weed control spectrum of the compound. The combinations of the present invention not only maintain excellent control of weeds in crops of useful plants, but also allow greater flexibility in succeeding crops.
The herbicidal composition of the present invention exhibits effective weed control effects on both dry-land weeds and paddy-field weeds. Thus, the herbicidal compositions can be used for weed control in crops of useful plants such as wheat, barley, rye, triticale, oats, maize, peanut, soybean, cotton, sugarcane, potato, rice or plantation like citrus orchards, vineyards.
Accordingly, the present invention provides the use of the herbicidal composition for controlling the germination or growth of weeds in crops of useful plants; the useful crop is selected from wheat, barley, rye, triticale, oat, corn, peanut, soybean, cotton, sugarcane, potato, rice crop, orange, grape.
Particularly preferred useful crops of the invention are corn, soybean, peanut, sugarcane, cotton, rice; cotton crops are particularly preferred.
The herbicidal compositions of the present invention can be used to control a large number of agronomically important weeds, such as:
the herbicidal compositions of the present invention are particularly suitable for controlling weeds, including grasses and broadleaf weeds, in fields of useful crops. For example:
cotton crops-weeds include Echinochloa (Echinochloa spp.), Leptochloa spp, Digitaria (Digitaria spp.), Amaranthus (Amaranthus spp.), Cyperus spp, Chenopodium (Chenopodium L.), Abutilon Miller, Setaria spp, Sagitaria spp, Sagittaria spp, Solanum nigrum (oanum), Amaranthus spp, Eleusine garten (Eleusine gartn), Eclipta (Eclipta spp), and the like;
wheat crops-weeds include Alopecurus (Alopecurus Species), precocious grasses (Poa-Species), alura-spec (Apera-specs), Avena (Avena spp.), Lolium (Lolium-specs), Bromus (broous-specs), forget-me-not (Myosotis spp.), cleaver (galium spp.), gerbera (Geranium spp.), speranskia (germanium spp.), Veronica (Veronica spp.), Viola (Viola spp.), Lamium (Lamium spp.), chickweed (stemona spp.), calli (calli spp.), Polygonum spp.), aea (Polygonum spp.), aethiopicula, calli (calli spp.), pellithum (calli spp.), pelargonium spp.), rhoea spp.), pellittora (calli spp.), cara spp.), eupata (calli spp.), carassia spp., carnea spp.);
rice crops-weeds include Echinochloa (Echinochloa spp.), Leptochloa spp, Digitaria spp, Setaria spp, Brachiaria spp and Duck grass (Ischeama spp), Ramaria spp, Lindernia spp, Ludwigia spp, Strigold, Scirpus spp, Cyperus spp, Irish spp, Spanish spp (Sachali spp), Spanish spp, Spiritis spp (Spanish spp), Spiritis spp (Spiritis spp, Spiritis spp (Costurtina spp, Spiritis spp, and Spiritis spp;
corn crops-weeds include Echinochloa (Echinochloa spp.), Digitaria (Digitaria spp.), Setaria (Setaria spp.), Cyperus (Cyperus spp.), Kochia spp, Matricaria spp, Chenopodium (Chenopodium spp.), Solanum spp, Polygonum (Polygonum spp.), Amaranthus spp);
sugarcane-weeds include Echinochloa (Echinochloa spp.), Digitaria (Digitaria spp.), Setaria (Setaria spp.), Brachiaria (Brachiaria spp.), Kochia (Kochia spp.) and Amaranthus (Amaranthus spp.).
In particular, the herbicidal compositions of the present invention are particularly suitable for controlling the germination or growth of undesirable weeds:
digitaria sanguinalis (Digitaria sanguinalis), Eleusine indica (Eleusines indica), piemarker (Abutilon theopteridis), Eclipta carinica (Eclipta prostrata), Alternanthera philoxeroides (Alternanthera philoxeroides), Stellaria gigas (Malachium aquaticum), Setaria viridis (L.) Beauv., Acalypha australis L., Cyperus rotundus L., Portulaca oleracea (L.)), Amaranthus retroflexus (Amaranthus retroflexus L., Abutilon theophrasti), Abelmoschus manihot (L.) Kuntze), Pelvetia scholaris (L.) Kuntze, Pleuropterus rotundus L., Pleuropterus vulgaris (L.) Kuntze), Spargania crispa japonica (L.), Adhatherum purpurea (L.), Spartina crispa (L.), Spartina indica (Xanthium purpurea), Spartina indica (L.), Spartina crispa (L.), Spartina crispa), Spartina (L.), Ecklonia inermis), Spartina (L.), Echina), Spartina (L.), Echinalis), Spartina (L.), Rottus), Spartina (L.), Robinia indica (L.), Robinia) and (L.) (L.), Spartina (L.) (L Equisetum ramosissimum Desf, Commelina communis (Herba Commelinae), Lophatherum gracile (Mlrdanniatriguetra), Eleocharis abrupta (Heleocharis plantaginis Tang et al), Fimbristylis major (L.) Vall, Cyperus rotundus L.), Iris floribunda (Scirpus juncoides Roxburgh), and Euphorbia lathyris (Leptochloa chinensis).
The use of the herbicidal composition of the present invention is not limited to the use for controlling these weeds described above, but may be used for controlling other weeds.
The present invention also provides a method of controlling weed germination or growth comprising: (i) before the weeds germinate; (ii) after the weeds germinate; or (iii) applying a herbicidally effective amount of the herbicidal composition of the present invention to the weeds or the growing locus thereof at (i) and (ii).
The present invention also provides a method for controlling the germination or growth of weeds, comprising contacting the weeds or their locus 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 present invention also provides a method for controlling the germination or growth of weeds by applying the herbicidal composition of the present invention to soil to control the germination or growth of weeds.
A method for controlling the germination or growth of weeds, wherein the herbicidal composition of the present invention is applied to weeds to control the germination or growth of weeds.
A method for controlling undesired germination or growth, comprising applying the active ingredients (A), (B) and (C) of the herbicidal composition of the present invention to weeds or their growing field collectively or individually so as to control their germination or growth.
A method for controlling weeds, wherein the active ingredients (A), (B) and (C) in the herbicidal composition of the present invention are applied to the soil before the emergence of weeds and the foliage of weeds after the emergence, either together or individually, to control the emergence or growth of weeds.
The term "weeds" are those plants that affect the growth and quality of useful crop plants. Including grasses and broadleaf weeds.
If the herbicidal composition according to the present invention is applied to the soil surface before the weeds germinate, the seedlings of the weeds are completely prevented from germinating, or the weeds grow to the cotyledon stage, but then they stop growing, and finally die completely after two to four weeks.
If the herbicidal composition is applied to the green parts of the weeds after their emergence, the growth likewise stops sharply within a relatively short time after the treatment, and the weed plants remain in the growth phase at the point of application, or they die completely after a certain time, in such a way that competition by weeds which is harmful to the useful crop is eliminated early and continuously.
Although the active components (a), (B), (C) already exhibit good or even sufficient selectivity in a large number of crops, phytotoxicity to the crop plants can in principle occur in some crops, in particular also in combination with other less selective herbicides. Compositions comprising the herbicidal compositions according to the present invention together with one or more safeners are particularly advantageous. The safeners are used in antidotally effective amounts, for example to reduce the phytotoxic side effects of the herbicides used in economically important crops or in fruit plantations (plantation crops). For example in wheat, barley, rye, triticale, oats, maize, peanut, soybean, cotton, sugarcane, potato, rice crops or plantations such as citrus orchards, vineyards.
The herbicidal compositions of the present invention may be applied in a conventional manner by using techniques well known to those skilled in the art. Methods of application include, but are not limited to, application to weeds or their locus, such as to the area adjacent to the plants, as well as pre-emergence, post-emergence, foliar (strewn, oriented, banded, spot, mechanical, overhead or re-growing), and application by hand, backpack, mechanical, tractor, or aerial (airplane, helicopter, drone).
A method for controlling weeds, which comprises adding the herbicidal composition of the present invention to irrigation water and applying it to weeds or their growing sites by using a ground or aerial duster, sprayer, or granule applicator.
The type of application depends in a well-known manner on the intended purpose; in any case, the technique should ensure the best possible distribution of the active ingredients in the herbicidal compositions according to the invention.
The application rate can vary within wide limits and depends on the soil properties, the application method (pre-emergence or post-emergence, etc.), the crop plants, 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 of the present invention may generally be applied in amounts of from 1 to 2000g/ha, preferably from 50 to 500 g/ha.
The herbicidal compositions of the present invention may be formulated in conventional formulations. The preparation form can be missible oil, aqueous suspension, oil suspension, seed treatment dry powder, seed treatment suspension, water dispersible granule, wettable powder, suspoemulsion, aerosol, coated granule, extruded granule, aqueous emulsion, microcapsule suspension-suspension, dry suspension, ultra-low volume liquid, electrostatic oil agent, gel, granule and fine granule.
The formulations according to the invention can be prepared by mixing the active ingredients (A), (B), (C) 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 black, light calcium carbonate, limestone, wood chips, corn starch, soluble starch, and the like.
Suitable emulsifiers may be anionic and/or nonionic emulsifiers such as alkylphenol ethoxylates, alkylphenol polyoxyethylene polyoxypropylene ethers, benzyl phenol polyoxyethylene ethers, 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, naphthalene sulfonic acid formaldehyde condensates, alkylphenol polyoxyethylene phosphates, alkylphenol polyoxyethylene ether formaldehyde condensate sulfates, alkylphenol polyoxyethylene ether phosphate esters, alkylphenol polyoxyethylene ethers, castor oil ethylene oxide adducts, ethylene oxide-propylene oxide block copolymers, alkylphenol polyoxyethylene ether formaldehyde condensates, octylphenol polyoxyethylene ether sulfates and methyl cellulose. For example, sodium lignosulfonate, calcium lignosulfonate, sodium methylnaphthalenesulfonate-formaldehyde condensate, sodium naphthalenesulfonate-formaldehyde condensate, sodium methylenenaphthalenesulfonate and the like.
The preferable preparation form of the invention can be wettable powder, missible oil, suspending agent, oil suspending agent, microcapsule, microemulsion, emulsion in water, 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 the use of corresponding auxiliaries for carrying out the invention. The dispersant is selected from polycarboxylate, lignosulfonate, alkyl naphthalene sulfonate, alkylphenol polyoxyethylene ether and ethylene oxide/propylene oxide block polyether; the wetting agent is selected from alkyl sulfate, alkyl sulfonate, naphthalene sulfonate, sodium lignosulfonate, 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 pottery clay.
For wettable powders, the auxiliaries 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, diatomaceous earth, kaolin, white carbon black, light calcium carbonate, talcum powder, attapulgite and argil.
For the suspending agents, usable are: the dispersant is selected from polycarboxylate, lignosulfonate and alkyl naphthalene sulfonate; the emulsifier is selected from alkylphenol formaldehyde resin polyoxyethylene ether, sorbitan monostearate), 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, sodium benzoate; the defoaming agent is an organic silicon defoaming agent; the antifreeze agent is selected from ethylene glycol, propylene glycol, glycerol, urea, and inorganic salts (such as sodium chloride).
For dispersible oil suspensions, the adjuvants that can be used are: the dispersant is selected from polycarboxylate, lignosulfonate, alkyl naphthalene sulfonate, castor oil polyoxyethylene ether, 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 white carbon black, polyvinyl alcohol, bentonite and magnesium aluminum silicate; the antifreeze 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, oleum Rapae, oleum Maydis, methyl oleate, diesel oil, engine oil, and mineral oil.
The formulations of the present invention contain active ingredients (a), (B) and (C), the weight of the active ingredients (a), (B) and (C) together making up 1% to 90%, preferably 5% to 80%, more preferably 5% to 70%, still more preferably 10% to 60% by weight of the herbicidal composition.
If appropriate, the herbicidal compositions according to the invention may also be provided with further additional components, for example protective colloids, adhesives, tackifiers, thickeners, antifreezes, antifoams, thixotropic agents, penetrants, stabilizers, sequestering agents, complex-forming agents. In general, the active ingredient may be combined with any solid or liquid additive conventionally used for formulation purposes.
Suitable thickeners are polysaccharides (e.g. xanthan gum, carboxymethylcellulose), inorganic clays (organically modified or unmodified), polycarboxylates and silicates.
Suitable anti-freeze agents are ethylene glycol, propylene glycol, urea and glycerol.
Suitable antifoams are polysiloxanes, long-chain alcohols and fatty acid salts.
Suitable binders are polyvinyl pyrrolidone, polyvinyl acetate, polyvinyl alcohol, polyacrylates and cellulose ethers.
The selection of application methods, such as foliar, drench, spray, dusting, scattering, can be made according to the intended object and prevailing circumstances, depending on the nature of the formulation.
When applied, the formulations may be in commercial form and, if desired, diluted in conventional manner, for example with water as wettable powders, emulsifiable concentrates, dispersants and water dispersible granules. For powders, soil application granules, broadcast granules and spray solution type formulations, it is common practice not to dilute them with other inert substances until use.
The herbicidal compositions according to the present invention may also comprise other components of various active compounds, for example selected from the group consisting of fungicides, insecticides, acaricides, nematicides, bird repellents, soil conditioners, and plant growth regulators.
The synergistic effect of the invention allows a reduction in the application rate of the individual herbicides, a higher efficacy at the same application rate, control of species which have not been controlled, control of species which are tolerant or resistant to a single herbicide or to a plurality of herbicides, an extended application period and/or a reduction in the number of individual applications required; and for the user, a more economically and ecologically advantageous weed control system is obtained.
Detailed Description
Biological test example
The method comprises the following steps:
according to the experimental design, the active components (A), (B) and (C) are respectively dissolved by acetone to prepare single-dose mother liquor, and then the mother liquor is diluted to the required concentration by using an aqueous solution containing 0.1 percent of Tween-80.
And (3) adopting a pot bottom infiltrating irrigation mode to completely wet the soil. And respectively sowing the weed seeds to be detected in plastic pots with the diameter of 20cm, sowing 20 seeds in each pot, and covering soil for about 2 cm. The next day, uniformly applying the prepared to-be-detected medicament to the surface of the soil by adopting a DeVries, SB6-202 walking type spray tower, and setting clear water for comparison; each treatment was repeated 3 times. After treatment, the pot is placed in a weed culture room. And weighing the fresh weight of the overground part 21 days after the pesticide application, and respectively calculating the fresh weight control effect.
Fresh weight control effect (%) = (blank control weed fresh weight-medicament treatment weed fresh weight)/blank control weed fresh weight x 100
The evaluation of the synergistic effect shown in the mixed application of the three herbicidal active ingredients was determined on the basis of the Colby's method described in "synergistic synergy and antibiotic Response of herbicidal compositions" (Weeds 15/1(1967), s.r.colby).
E0=A×B×C/ (100×（N-1））
N is 3;
a is the survival rate of weeds when the active ingredient (A) is used in an amount of m g/ha or at a concentration of m ppm; expressed as a percentage of untreated control;
b is the survival rate of weeds when active ingredient (B) is used at an amount of n g/ha or at a concentration of n ppm; expressed as a percentage of untreated control;
c is the survival rate of weeds when active ingredient (C) is used at a level of h g/ha or at a concentration of h ppm; expressed as a percentage of untreated control;
E0is the theoretical weed survival when using active compounds (A), (B) and (C) in amounts of m, n, h g/ha or at concentrations of m, n, h ppm;
if the actually observed weed survival rate (E) is less than the theoretical weed survival rate (E)0) Then the composition is super-additive, i.e. has a synergistic effect.
TABLE 1 control of Solanum nigrum
Figure 195307DEST_PATH_IMAGE002
TABLE 2 preventive Effect against Xanthium strumarium
Figure 331891DEST_PATH_IMAGE003
TABLE 3 preventive effects on Cyperus rotundus
Figure 769DEST_PATH_IMAGE004
TABLE 4 Effect against abutilon
Figure 931816DEST_PATH_IMAGE005
TABLE 5 control of barnyard grass
Figure 686146DEST_PATH_IMAGE006
The results of the above tests show that the herbicidal effect of the combination of active ingredients (A), (B) and (C) is significantly better than that of the individual application of active ingredients (A), (B) or (C), and that it has a significant herbicidal benefit.

Claims (10)

1. A herbicidal composition, characterized in that it comprises as active ingredient
(A) Flumioxazin
And
(B) diuron (D)
And
(C) one of pendimethalin, oxadiazon or flufenacet.
2. A herbicidal composition according to claim 1, wherein the weight ratio of the active component (A), the active component (B) and the active component (C) is 1-10: 1-100, preferably 1-10: 1-50, more preferably 1-10: 1-20, more preferably 1-5: 1-20, more preferably 1-5: 5-20.
3. A herbicidal composition according to claim 1, characterized in that the weight of the active components (a), (B) and (C) together represents 1% to 90%, preferably 5% to 80%, more preferably 5% to 70%, still more preferably 10% to 60% by weight of the herbicidal composition.
4. The herbicidal composition as claimed in claim 1, wherein said herbicidal composition is formulated as emulsifiable concentrates, aqueous suspensions, oil suspensions, dry powders for seed treatment, suspensions for seed treatment, water dispersible granules, wettable powders, suspoemulsions, aerosols, coated granules, extruded granules, aqueous emulsions, microcapsule suspensions, microcapsule suspension-suspensions, dry suspensions, ultra-low volume liquids, electrostatic oils, gels, granules, microgranules.
5. Use of the herbicidal composition according to claim 1 for controlling the germination or growth of weeds in crops of useful plants selected from the group consisting of wheat, barley, rye, triticale, oats, corn, peanut, soybean, cotton, sugarcane, potato, rice, citrus, grapes.
6. Use of the herbicidal composition of claim 1 to control weed germination or growth in soybean, corn, peanut, cotton, sugarcane, potato, rice field crops.
7. A method of controlling weed germination or growth, comprising: (i) before the weeds germinate; (ii) after the weeds germinate; or (iii) applying a herbicidally effective amount of the herbicidal composition of claim 1 to the weeds or the locus thereof at (i) and (ii).
8. A method for controlling the germination or growth of weeds, characterized in that the herbicidal composition according to claim 1 is applied to soil to control the germination or growth of weeds.
9. A method for controlling the germination or growth of weeds, characterized in that the herbicidal composition according to claim 1 is applied to weeds to control the germination or growth of weeds.
10. A method for controlling the germination or growth of weeds, characterized in that the herbicidal composition according to claim 1 is applied to the soil before the germination of weeds, to the foliage of weeds after the germination of weeds, to control the germination or growth of weeds.
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