CN114287435B - Weeding composition - Google Patents
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- CN114287435B CN114287435B CN202210047031.7A CN202210047031A CN114287435B CN 114287435 B CN114287435 B CN 114287435B CN 202210047031 A CN202210047031 A CN 202210047031A CN 114287435 B CN114287435 B CN 114287435B
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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
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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
- 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
- A01N33/20—Nitro compounds containing oxygen or sulfur attached to the carbon skeleton containing the nitro group
- A01N33/22—Nitro compounds containing oxygen or sulfur attached to the carbon skeleton containing the nitro group having at least one oxygen or sulfur atom and at least one nitro group directly attached to the same aromatic ring system
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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
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
- A01N43/42—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings condensed with carbocyclic rings
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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
- A01N43/74—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 five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,3
- A01N43/76—1,3-Oxazoles; Hydrogenated 1,3-oxazoles
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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
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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
- A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
Abstract
The invention relates to a weeding composition, which contains active components (A) and (B), wherein the active component (A) is a compound shown in a formula I, and the active component (B) is one of the following compounds: oxazosulfuron, flumioxazin, ethoxysulfuron, oxyfluorfen, quinclorac, and pyraclonil. The invention also relates to the application of the weeding composition for controlling the germination or growth of weeds such as barnyard grass, quinoa, sedum aizoon, heterotypic nutgrass flatseum, gloiopeltis, chinese iris, purslane, arrowhead, sweet wormwood and the like, wherein the active components (A) and (B) are applied in a synergistic proportion;
Description
The invention is a divisional application with the application number of 202010012738.5, the application date of 2020.1.7 and the name of 'a weeding composition'.
Technical Field
The invention relates to a weeding composition, belonging to the technical field of crop protection; the herbicidal compositions of the present invention are particularly suitable for controlling weeds in rice crops.
Background
The compounds of formula I are protoporphyrinogen oxidase inhibitors; it was first described as a herbicide in EP0241559.
I is a kind of
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.
Disclosure of Invention
The object of the present invention is 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, expansion of herbicidal spectrum, combination of fast and long acting effects, resistance management to delay resistance.
The present invention has unexpectedly found that the combination of active components (a) and (B) co-act in a particularly advantageous manner. The simultaneous (i.e. combined or separate) application of the active components (a) and (B) or the sequential application of the active components (a) and (B) gives enhanced weed control compared to the possible control rates of the individual compounds, the unexpected effect being a true synergistic effect, not just the addition of the activities.
The weeding composition disclosed by the invention is realized by adopting the following technical scheme:
a herbicidal composition comprising active components (a) and (B); the active component (A) is a compound of the formula I, and the active component (B) is selected from one of the following compounds: oxaziclomefone, flumioxazin, ethoxysulfuron, oxyfluorfen, quinclorac, and pyraclonil; the weight ratio of the active components (A) to (B) is 100:1-1:100.
I is a kind of
The active component (B) is selected from metazosulfuron, and the weight ratio of the active components (A) to (B) is 100:1-1:100, preferably 50:1-1:50, preferably 25:1-1:25, more preferably 10:1-1:10, more preferably 5:1-1:5.
The active component (B) is selected from flumioxazin, and the weight ratio of the active components (A) to (B) is 50:1-1:50, more preferably 25:1-1:25, more preferably 10:1-1:10, more preferably 5:1-1:5.
The active component (B) is selected from oxyfluorfen, and the weight ratio of the active components (A) to (B) is 50:1-1:50, preferably 25:1-1:25, more preferably 10:1-1:10, and more preferably 5:1-1:5.
The active component (B) is selected from ethoxysulfuron, and the weight ratio of the active components (A) to (B) is 1:1-50:1, preferably 1:1-40:1, more preferably 2:1-40:1, more preferably 5:1-40:1, more preferably 8:1-30:1.
The active component (B) is selected from quinclorac, and the weight ratio of the active components (A) to (B) is 50:1-1:50, preferably 25:1-1:25, more preferably 15:1-1:15, more preferably 10:1-1:10, more preferably 5:1-1:5.
The active component (B) is selected from the group consisting of the pyraclonil, and the weight ratio of the active components (A) to (B) is 50:1-1:50, preferably 25:1-1:25, more preferably 10:1-1:10, more preferably 5:1-1:5.
The herbicidal composition according to the present invention shows a significantly improved weed control effect (synergistic effect) compared to the additive effect of each compound contained in the composition alone.
Thus, the herbicidal compositions of the present invention exhibit reduced application concentrations of each individual compound. But also has longer control time for weeds.
The invention also relates to the use of said herbicidal composition for weed control. The herbicidal composition of the present invention exhibits a good control effect on the following weeds:
dicotyledonous weeds: polygonum (Polygonum), artemisia (Rotala), matricaria (Lindernia), bidens (Bidens), ecliptae (Eclipta), chickweed (Elatine), anise (Gratiola), syzygium (Ludwigia), oenanthe (Oenanthe), juliana (Monochoria), artemisia (Artemisia).
Monocotyledonous weeds: barnyard grass (Echinochloa), scirpus (Scirpus), chenopodium (Panicum), poa (Poa), cyperus (Cyperus), fimbristylis (Fimbristylis), sagittaria (Sagittaria), chufa (Elecharis), alisma (Alisma), lophatherum (Aneilema), ocular vegetables (Potamogteton), sagittaria (Sagittaria L.), cyperus (Cyperus Linn.) and the like.
In particular, the herbicidal composition of the present invention can be used for controlling the following representative weeds:
barnyard grass (Echinochloa crusgalli), japanese fluorescent iris (Scirpus juncoides), quinoa (chenopodium album l.), ear She Shuixian (Ammannia arenaria h.b.k.), heteromorphic sedge (Cyperus difformis l.), scirpus platyphylla (Scirpus planiculmis Schmidt), common sage (Linderniaprocumbens Philcox), sparganium stoloniferum (Cyperus rotundus l.), alisma orientale (Alisma taceae), arrowhead (Sagittaria trifolia), sesbania (Sesbania exaltata), japanese knotweed (Commelinfusa), japanese glossopus (Monochoria vaginalis), festival grass (Equisetum ramosissimum Desf), dayflower (Herba Commelina), water bamboo leaf (mrdanniatiduguera), wild chufa (Heleocharisplantagineiformis Tanget Wang), sun-dried balloonflower (Fimbristylis miliacea (l.) Vahl), garcinia (Cyperus sativa l.), stephania (leptosus), sedum (leicosum), flos yunnamomum (Monochoria korsakowii), purslane (Portulaca oleracea l), and sweet wormwood herb (haena).
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 invention provides an application of the weeding composition in 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; cereals (e.g. wheat, barley, rye, oats, maize, rice, sorghum), cotton, soybean are preferred.
The herbicidal composition of the present invention exhibits an effective weed control effect particularly against low-ground weeds. Thus, the herbicidal compositions are also useful for weed control in useful plants such as cereal crops or plantation crops, particularly for selectively controlling weeds, more preferably for controlling weeds in rice crops, including rice. In particular, in rice planting, the herbicidal composition of the present invention can obtain a good weed control effect immediately after rice planting and throughout the growth period of rice.
The invention provides a use of the herbicidal composition in controlling weeds in useful plants, such as Polygonum (Polygonum), artemisia (Rotala), matricaria (Lindernia), bidens (Bidens), duchesnea (Eclipta), cyperus (Elatine), anise (Gratiola), polygonum (Ludwigia), oenanthe (Oenothera), yujia (Monochoria), artemisia (Artemisia), echinochloa (Scirpus), chenopodium (Panicum), cyperus (Poa), cyperus (Cyperus), scirpus (Fimbristylis), cirsia (Sagittaria), elecarria (Elecharia), alisma (Alisma), phyllostachys (Anleia), oenanthe (Postata), satagon (Satagon), sagittaria (L), cyperus (Cyperus), and the like, in synergistic ratio.
The invention provides synergistic applications of the weeding composition for controlling barnyard grass (Echinochloa crusgalli), chinese iris (Scirpus juncoides), chenopodium album L.), ear She Shuixian (Ammannia arenaria H.B.K.), special-shaped nutgrass (Cyperus difformis L.), flat-stalk scirpus (Scirpus planiculmis Schmidt), common sage (Linderniaprocumbens Philcox), common burreed herb (Cyperus rotundus L.), rhizoma alismatis (Alisma taceae), indian arrowhead (Sagittaria trifolia), sesbania (Sesbania exaltata), japanese bamboo flower (Commelina), japanese glossostrea (Monochoria vaginalis), festival grass (Equisetum ramosissimum Desf), dayflower (Herba Commelina e), water bamboo leaf (Mllrdania angustifolia), wild water chestnut (Heleocharisplantagineiformis Tang et Wang), japanese sage (Fimbristylis miliacea (L.), garrulline (Cyperia L.), climbing fern (Leptospermum) seed (Leptospermum), rain flower (Monochoria korsakowii), herba Portulacae (49A), herba Portulacae (A) and the like, and the synergistic applications.
The invention provides the use of the herbicidal composition for controlling the germination or growth of weeds such as barnyard grass (Echinochloa crusgalli), quinoa (Chenopodium album l.), sedum aizoon (Monochoria korsakowii), heteromorphic sedge (cyperusadifformis l.), glossoides (Monochoria vaginalis), japanese rush (Scirpus juncoides), purslane (Portulaca oleracea l.), sagittaria sagittifolia (sagittaria trifolia), sweet wormwood (a. Apiacea Hance) and the like, wherein the active components (a) and (B) are applied in a synergistic ratio.
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 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.
The formulations according to the invention can be prepared by mixing the active components (A) and (B) together with a spreading agent, for example a liquid diluent and/or a solid diluent, and, if desired, a surfactant, for example an emulsifier and/or a dispersant and/or a foaming agent.
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.
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.
The formulations according to the invention contain active components (a) and (B) which together constitute from 1% to 90%, preferably from 5% to 90%, more preferably from 10% to 80%, still more preferably from 10% to 70% by weight of the herbicidal composition.
In another aspect, a composition comprising a herbicidal composition according to the invention and one or more safeners is particularly advantageous. Suitable safeners may be selected from at least one of benoxacor, metamifop (fenchlorazole), metamifop ethyl (fenchlorazole-ethyl), cloquintocet-mexyl (cloquintocet-mexyl), furazoles (Furilazole), 2-dichloro-2-methyl-1, 3-dioxane, oxadiazon (cyclotricril), oxazin (oxabel), oxazin (fenpicline), oxadiazon (fludan), oxaden (actetamide), bisbenzoxazole (Isoxadifen), bisbenzoxazole ethyl (Isoxadifen), cyclopropanesulfonamide (cyclopanesulfonyl), and mefenamic acid.
The weight ratio of active components (a) and (B) to safener in the herbicidal composition generally depends on the application rate of the herbicide and the effect of the safener and can vary within a wide range, for example, in the range from 1000:1 to 1:300 in particular. The safener can be formulated with the active components (a) and (B) in the finished formulation or supplied and used in the form of a tank mix with the herbicidal composition.
Safeners can be used for the pretreatment of seed material of cultivated plants (seed dressing) or can penetrate into the soil before or after sowing. It is also possible to apply the herbicidal compositions of the present invention alone or together after germination of the plants. The treatment of the plant or seed material with the safener is in principle unaffected by the time of herbicide application. Weeds can also be treated by applying the herbicide and safener simultaneously (e.g., in the form of a tank mix).
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).
The present invention provides a method of controlling the germination or growth of weeds in a useful plant, comprising applying the herbicidal composition of the present invention in the presence of the useful plant, the seed of the useful plant or other reproductive parts of the useful plant.
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 a herbicidal composition containing a compound of formula I and a compound II to the weeds or the locus thereof at the time of (I) and (II).
The present invention also provides a method of controlling weeds comprising contacting the weeds or their locus with a herbicidally effective amount of the 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, which comprises applying the herbicidal composition of the present invention to the leaf surfaces of weeds to control the germination or growth of weeds.
A method for controlling the germination or growth of weeds, wherein the active ingredients (A) and (B) in the herbicidal composition of the present invention are applied to weeds or their habitat together or individually so as to control the germination or growth of weeds.
A method for controlling the germination or growth of weeds, wherein the active components (A) and (B) in the herbicidal composition of the present invention are applied to the ground before the germination of weeds and to the foliage after the germination of weeds together or separately to control the germination or growth of 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 plants after germination of the weeds, the growth is likewise 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.
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.
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.
For administration, the wettable powders, emulsifiable concentrates, dispersions and water dispersible granules can be diluted in a conventional manner, for example with water. For soil application formulations of the granule and spray solution type, other inert substances are generally not diluted before application.
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 invention allows for reduced application rates of individual herbicides, greater effectiveness at the same application rate, control of varieties that have not yet been controlled, control of varieties that are resistant or resistant to the individual herbicide or herbicides, extended application periods and/or reduced number of individual applications required; and a more economically and ecologically advantageous weed control system is obtained for the user.
The herbicidal compositions according to the invention, the active components (A) and (B) in combination act together in a particularly advantageous manner. The simultaneous (i.e. combined or separate) application of the active components (a) and (B) or the sequential application of the active components (a) and (B) gives enhanced weed control compared to the possible control rates of the individual compounds, the unexpected effect being a true synergistic effect, not just the addition of the activities.
Detailed Description
Biological test case
The active ingredient (A) (compound of formula I) and active ingredient (B) in the table were dissolved with acetone to prepare a single-dose mother liquor, and then diluted to a desired concentration with an aqueous solution containing 0.1% Tween-80.
Indoor potting test. The weed seeds to be measured are respectively sown in plastic pots with the diameter of 20 cm. And (5) sealing and spraying the soil two days after sowing. After the medicine is applied, water is supplied from the bottom of the basin to keep the soil moist, and no water is accumulated on the soil surface. And setting a clear water contrast; each treatment was repeated 3 times. 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 specific combination of two active compounds may be achieved using the so-called "Colby formula" (see S.R. Colby, "Calculating Synergistic and Antagonistic Responses of Herbicide Combinations", 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 after 21D
TABLE 2 control of Duck grass after 21D
TABLE 3 control of Chenopodium quinoa after 21D
Table 4 21D control of Portulaca oleracea
As can be seen from the test results in tables 1 to 4, the herbicidal composition of the present invention has a significantly better herbicidal effect than the herbicidal effect obtained by independently applying the active component (A) and the active component (B), and has a significantly better herbicidal effect.
Claims (6)
1. The use of a herbicidal composition for controlling the germination or growth of weeds in rice crops, characterized in that the active component in the herbicidal composition consists of an active component (A) and an active component (B), wherein the active component (A) is a compound of formula I, the active component (B) is pyraclonil, the weight ratio of the active component (A) to the active component (B) is 5:1-1:5,
a formula I;
the weeds are barnyard grass, glossoside, quinoa or purslane.
2. The use according to claim 1, wherein the herbicidal composition is formulated as wettable powder, emulsifiable concentrate, suspension concentrate, oil suspension concentrate, microcapsule, microemulsion, aqueous emulsion, suspoemulsion, water dispersible granule, microcapsule suspension-suspension or ultra low volume liquid.
3. The use according to claim 1, wherein (i) before 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).
4. The use according to claim 1, characterized in that the herbicidal composition of claim 1 is applied to the soil to control the germination or growth of the weeds.
5. The use according to claim 1, characterized in that the herbicidal composition of claim 1 is applied to the weed foliage to control the germination or growth of the weeds.
6. The use according to claim 1, characterized in that the herbicidal composition of claim 1 is applied to the ground before the germination of the weeds, the foliage after the germination of the weeds to control the germination or growth of the weeds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210047031.7A CN114287435B (en) | 2020-01-07 | 2020-01-07 | Weeding composition |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN107114384A (en) * | 2017-05-27 | 2017-09-01 | 北京科发伟业农药技术中心 | A kind of Herbicidal combinations containing pyraclonil |
| CN112889830A (en) * | 2019-12-04 | 2021-06-04 | 江苏龙灯化学有限公司 | Weeding composition |
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| AU760278B2 (en) * | 1998-11-10 | 2003-05-08 | Syngenta Participations Ag | Herbicidal composition |
| CN108064849A (en) * | 2016-11-15 | 2018-05-25 | 江苏龙灯化学有限公司 | A kind of Herbicidal combinations |
| CN106993626A (en) * | 2017-05-19 | 2017-08-01 | 北京科发伟业农药技术中心 | A kind of Herbicidal combinations of Han Huan Wu Evil humulones and furans sulphur humulone |
| CN106982845A (en) * | 2017-05-19 | 2017-07-28 | 北京科发伟业农药技术中心 | A kind of Herbicidal combinations containing the Evil humulones of ring penta and three azole amides |
| CN107183045A (en) * | 2017-05-19 | 2017-09-22 | 北京科发伟业农药技术中心 | A kind of Herbicidal combinations of Han Huan Wu Evil humulones |
| CN108477197A (en) * | 2018-06-04 | 2018-09-04 | 山东耘歌生物科技有限公司 | A kind of effervescent formulation containing Huan Wu Evil humulones, ethoxysulfuron and mefenacet |
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| CN107114384A (en) * | 2017-05-27 | 2017-09-01 | 北京科发伟业农药技术中心 | A kind of Herbicidal combinations containing pyraclonil |
| CN112889830A (en) * | 2019-12-04 | 2021-06-04 | 江苏龙灯化学有限公司 | Weeding composition |
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| CN114287436B (en) | 2023-10-31 |
| CN113142237A (en) | 2021-07-23 |
| CN114271287B (en) | 2023-10-20 |
| CN114271287A (en) | 2022-04-05 |
| CN114287436A (en) | 2022-04-08 |
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