CN116508772A - Weeding composition - Google Patents

Weeding composition Download PDF

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Publication number
CN116508772A
CN116508772A CN202310519276.XA CN202310519276A CN116508772A CN 116508772 A CN116508772 A CN 116508772A CN 202310519276 A CN202310519276 A CN 202310519276A CN 116508772 A CN116508772 A CN 116508772A
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Prior art keywords
weeds
herbicidal composition
active component
germination
growth
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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 CN202310519276.XA priority Critical patent/CN116508772A/en
Publication of CN116508772A publication Critical patent/CN116508772A/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
    • 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

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  • Life Sciences & Earth Sciences (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Plant Pathology (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Pest Control & Pesticides (AREA)
  • General Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Agronomy & Crop Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

A herbicidal 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: 1-100. The invention also relates to 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, 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 cotton crops.

Description

Weeding composition
The application is a divisional application with the application number of 201911260272.4, the application date of 2019, 12 months and 10 days, and the name of the divisional application of 'a 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 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.
I is a kind of
Disclosure of Invention
The present invention 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 invention provides a weeding composition containing active ingredients
(A) Flumioxazin
And
(B) Diuron (diuron)
And
(C) One of pendimethalin, oxadiazon or flufenacet.
The herbicidal composition of the present invention comprises active components in a weight ratio such that a synergistic effect is obtained.
The weight ratio of the active component (A), the active component (B) and the active component (C) is 1-10:1-100: 1-100.
Further, the weight ratio of the active component (A), the active component (B) and the active component (C) is 1-10:1-50:1-50.
Further, the weight ratio of the active component (A), the active component (B) and the active component (C) is 1-10:1-20:1-20.
Further, the weight ratio of the active component (A), the active component (B) and the active component (C) is 1-5:1-20:1-20.
Still further, the weight ratio of the active component (A), the active component (B) and the active component (C) is 1-5:5-20:5-20.
The present invention has unexpectedly found that the combination of active component (a), active component (B) and active component (C) co-acts in a particularly advantageous manner.
The simultaneous application of the active components (a), (B) and (C) or the sequential application of the active components (a), (B) and (C) 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 the addition of the activities.
Thus, the herbicidal compositions of the present invention 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 invention, the application rate of a single compound is reduced while maintaining a good level of action; second, the herbicidal composition of the present invention 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 invention remarkably broadens the spectrum of control of weeds by the compound. The combination of the invention not only maintains excellent control of weeds in crops of useful plants, but also allows greater flexibility in succeeding crops.
The herbicidal composition of the present invention 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 crops of useful plants such as wheat, barley, rye, triticale, oats, corn, peanuts, soybeans, cotton, sugarcane, potatoes, rice crops or plantations such as citrus orchards, vineyards.
Accordingly, the present invention provides the use of the herbicidal composition in 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, citrus, grape.
Particularly preferred crops of useful plants according to the invention are maize, soybean, peanut, sugar cane, cotton, rice; cotton crops are particularly preferred.
The herbicidal compositions of the present invention can be used to control a wide variety of agro-economically important weeds, such as:
the herbicidal compositions of the present invention are particularly suitable for controlling weeds, including grasses and broadleaf weeds, in crops of useful plants. For example:
cotton crops-weeds include barnyard grass (Echinochloa spp.), stephania Leptochloa spp.), crabgrass (Digitaria spp.), amaranthus (Amaranthus spp.), nutgrass (Cyperus spp.), chenopodium (chenopodium l.), abutilon (Abutilon Miller), green bristlegrass (Setaria spp.), arrowhead (Sagittaria spp.), black nightshade (sloan), amaranthus (Amaranthus spp.), pone (eleeusine gaertn), eclipta (Eclipta), and the like;
the wheat crop-weeds include Myrtus (Alopecurus Species), poa (Poa-specs), agrimonia (Apera-specs), avena (Avena spec), lolium (Lolium-specs), bromus (Bromus-specs), foeniculum (Myosotis spec.), galium (Galium spec.), geranium (Geranium spec.), veronica (Veronica spec.), viola (Viola spec.), viola wild sesame (Lamium spp.), chickweed (Stellaria spp.), polygonum (Polygonum spp.), aechusa cynapum, phyllanthus (Alchemila spp), kochia (Kochia spp.), matricaria (Matricaria spp), matricaria (Antheraea spp), papaver (Papaver spp), dohnum (Myosotisspp), capsella (Capsella spp), chenopodium (Chenopodium spp);
rice crops-weeds include barnyard grass (Echinochloa spp.), stephania Leptochloa spp.), crabgrass (Digitaria spp.), bristlegrass (Setaria spp.), brachypodium spp.), duckbill grass (Ischeamum spp.), longhairy antenoron (Monochoria spp.), mother grass (Lindernia spp.), lilac knotweed (Ludwigia spp.), chickweed (Elatine spp.), scirpus spp, cyperus spp.), russelus spp, holipus spp, festival spp, commelina spp, sampleus spp, and Filipendula spp;
corn crops-weeds include barnyard grass (Echinochloa spp.), crabgrass (Digitaria spp.), green bristlegrass (Setaria spp.), cyperus (Cyperus spp.), kochia (Kochia spp.), chamomile (Matricaria spp.), chenopodium (Chenopodium ppp), solanum (Solanum spp), polygonum (Polygonum spp), amaranthus (Amaranthus spp.);
sugarcane-weeds include barnyard grass (Echinochloa spp.), crabgrass (Digitaria spp.), setaria (Setaria spp.), brachyo (Brachiaria spp.), kochia (Kochia spp.), and amaranthus (Amarachusspp.).
In particular, the herbicidal compositions of the present invention are particularly suitable for controlling the germination or growth of the following undesirable weeds:
the formulation comprises the following components of large crabgrass (Digitaria sanguinalis), eleusine indica (Eleusine indica), piemarker (Abutilon theophrasti), eclipta alba (Eclipta prostrata), allium hollow (Alternanthera philoxeroides), bovine chickweed (Malachiumaaquatum), green bristlegrass (Setaria viredis (L.) Beauv.), acalypha australis (Acalypha australis L.), nutgrass (Cyperus rotundatus L.), purslane (Portulaca oleracea L.), amaranthus retroflexus (Amaranthus retroflexus L.), abutilon (Abutileo thes), solanum nigrum (Solanum nigrum), round leaf morning (Ipomoea purpleum), xanthium (Xanthium sibiricum), barnyard grass (Echinochloa crusgalli), ear She Shuixian (Ammannia arenaria H.B.K.), special-shaped nutgrass (Cyperus difformis L.), scirpus (Scirpus planiculmis Schmidt), ulipressin (Lindernia procumbens Philcox), grasswort (Cyperus rotundus L.), herba Portulacae (Portulaca oleracea L.), herba Cypernicifluviae (Abutili) (52L.), herba Cyperllae (Cyperus (Abutili), herba Cyperi (Abutili) and (Cyperus) Herba cistanches (Abutili (35L.), filipressi (Cyperus), herba Elliptae (Abelmosi (Cyperus (Abelmosi), herba Elliptae (Abelmosi) (35).
The use of the herbicidal composition of the present invention is not limited to control of these weeds as described above, but may be used for control of other weeds.
The present invention 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 of the present invention to the weeds or the locus thereof at the time of (i) and (ii).
The present invention 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 invention 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 invention to weeds to control the germination or growth of weeds.
A method for controlling undesired sprouting or growth, comprising applying the active ingredients (A), (B) and (C) in the herbicidal composition of the present invention to weeds or a locus thereof, together or separately, to thereby control sprouting or growth.
A method for controlling weeds, wherein the active components (A), (B) and (C) in the herbicidal composition of the present invention are applied to soil before germination of weeds and to leaf surfaces after germination of weeds together or separately to control 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 invention 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, the growth is also stopped sharply in a relatively short time after the treatment, and the weed plant remains in the growing period at the point of application time, or it dies completely after a certain time, in such a way that competition by weeds harmful to the useful crops is eliminated early and continuously.
Although the active components (a), (B), (C) already show 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 invention 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 invention 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 invention 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 invention.
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 invention can 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 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 invention can be prepared by mixing the active components (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, 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 invention 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 invention. 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 invention contain active components (a), (B) and (C) in total in amounts of 1% to 90%, preferably 5% to 80%, more preferably 5% to 70%, still more preferably 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 invention. 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 invention 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 invention 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:
according to the test design, the active components (A), (B) and (C) are dissolved by acetone to prepare a mother solution of a single agent, and then the mother solution is diluted to the required concentration by aqueous solution containing 0.1% of Tween-80.
The soil is completely wetted by adopting a infiltrating irrigation mode at the bottom of the pot. The weed seeds to be measured are respectively sown in plastic pots with the diameter of 20cm, 20 seeds are sown in each pot, and the soil is covered by about 2cm. 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. After treatment, the pot was placed in the weed culture chamber. 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
Evaluation of the synergism shown in the mixed application of the three herbicidal active ingredients was determined based on the Colby's method described in "CalculationSynergistic and Antagonistic Response of Herbicide Combinations" (wells 15/1 (1967), s.r. Colby).
E 0 =A×B×C/ (100× （N-1） ）
N is 3;
a is the survival 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 of weeds when the active ingredient (B) is used in an amount of n g/ha or at a concentration of n ppm; expressed as a percentage of untreated control;
c is the survival of weeds when the active ingredient (C) is used in an amount of h g/ha or at a concentration of h ppm; expressed as a percentage of untreated control;
E 0 is 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 actual observed weed survival rate (E) is smaller than the theoretical weed survival rate (E 0 ) The composition then has a synergistic effect by adding up.
TABLE 1 control effect on Solanum nigrum
TABLE 2 control of Xanthium sibiricum
TABLE 3 control of Cyperus rotundus
TABLE 4 control of Abutilon
TABLE 5 control of barnyard grass
As can be seen from the above test results, the herbicidal effect of the combination of the active components (A), (B) and (C) is significantly better than that of the individual application of the active components (A), (B) or (C), with a significant herbicidal gain effect.

Claims (16)

1. A herbicidal composition comprising an active ingredient
(A) Flumioxazin
And
(B) Diuron (diuron)
And
(C) Fluofenacet;
the weight ratio of the active component (A), the active component (B) and the active component (C) is 1-10:1-100:1-100.
2. The 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 to 10:1 to 50:1 to 50.
3. The 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 to 10:1 to 20:1 to 20.
4. The 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 to 5:1 to 20:1 to 20.
5. The 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 to 5:5 to 20:5 to 20.
6. The herbicidal composition according to claim 1, wherein the weight of the active components (a), (B) and (C) together amounts to 1% -90% by weight of the herbicidal composition.
7. The herbicidal composition according to claim 1, wherein the weight of the active components (a), (B) and (C) together amounts to 5% -80% by weight of the herbicidal composition.
8. The herbicidal composition according to claim 1, wherein the weight of the active components (a), (B) and (C) together amounts to 5% -70% by weight of the herbicidal composition.
9. The herbicidal composition according to claim 1, wherein the weight of the active components (a), (B) and (C) together amounts to 10% -60% by weight of the herbicidal composition.
10. The herbicidal composition of claim 1, wherein the herbicidal composition is formulated as an emulsifiable concentrate, an aqueous suspension, an oil suspension, a seed-treatment dry powder, a seed-treatment suspension, a water dispersible granule, a wettable powder, a suspoemulsion, an aerosol, a coated granule, an extruded granule, an aqueous emulsion, a microcapsule suspension-suspension, a dry suspension, an ultra-low volume liquid, an electrostatic oil, a gel, a granule, a microparticle.
11. Use of the herbicidal composition of 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, oat, corn, peanut, soybean, cotton, sugarcane, potato, rice, citrus, grape.
12. Use of the herbicidal composition of claim 1 for controlling the germination or growth of weeds in soybean, corn, peanut, cotton, sugarcane, potato, paddy crops.
13. 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).
14. 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.
15. A method of controlling the germination or growth of weeds, characterized in that the herbicidal composition of claim 1 is applied to weeds to control the germination or growth of weeds.
16. 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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CN102132701A (en) * 2010-01-25 2011-07-27 安徽丰乐农化有限责任公司 Weeding combination for soybean and peanut fields
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