CN103283760B - Rice field weeding composite and preparation thereof - Google Patents
Rice field weeding composite and preparation thereof Download PDFInfo
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Abstract
The invention relates to the field of pesticide preparations, and discloses a rice field weeding composite and a preparation thereof. The weeding composite is prepared from sulphonamide compound pyrimisulfan and a sulfonylurea compound with a ratio weight of 1:10-20:1. According to the rice field weeding composite and the preparation thereof, the sulphonamide compound pyrimisulfan and the sulfonylurea compound are compounded to serve as an active ingredient; the sulphonamide compound pyrimisulfan and the sulfonylurea compound, which complement each other in advantages and synergistically act, can be used for slowing the generation of herbicide resistance of weeds and meanwhile has a synergistic effect on rice field weeding; the use amount and the number of use times of the herbicide are reduced greatly, so that the composite and the preparation thereof have the advantages of safety, high efficiency, environment friendliness and the like and can be widely used for preventing and controlling rice field weeds.
Description
Technical field
The present invention relates to pesticidal preparations field, relate to specifically a kind of Herbicidal composition for paddy fields and preparation thereof.
Background technology
Paddy rice is annual gramineae plant, produces the each continent spreading all over except the South Pole, and paddy rice is not only the main cereal crops of China, one of Ye Shi world staple food crop.Approximately 1.45 hundred million hectares of whole world Monitoring of Paddy Rice Plant Areas.China's rice growing area accounts for 1/4 of national cereal crops.No matter cultivated area or output, paddy rice all ranks first in China cereal crops.But the rice field of all rice workspaces of China, always has crop smothering in various degree to occur.Wherein, medium crop smothering area accounts for the more than 46% of the total cultivated area of paddy rice, and serious crop smothering area is more than 11.5%, and these weeds and paddy rice are at war with in every respect, and paddy rice is worked the mischief, and lose every year thus more than 200 hundred million kilograms, grain.Therefore, domestic rice field is widely used weed killer herbicide, avoids paddy rice because of the weeds underproduction.
But, owing to using the change of a certain class weed killer herbicide and wheatland cropping system, the introducing of new varieties at paddy field for a long time, make weed community occur significantly to change, paddy field weed bamboo telegraph also constantly spreads, and some weed killer herbicides have been found to have produced resistance, particularly sulfonyl urea compound weed killer herbicide.And broad leaved weed is as strong in weeds in paddy field fertilities such as angustifolia arrowhead herb, rhizoma alismatis, Monochoria vaginalis, Monochoria korsakowiis, diffusion velocity is fast, and harm is heavy, has become the de novo malignant weed of paddy field in recent years, causes Severe Reduction of Rice.In recent years, angustifolia arrowhead herb, rhizoma alismatis, Monochoria vaginalis, Monochoria korsakowii etc. constantly strengthen the anti-drug resistance of sulfonylurea (especially bensulfuron-methyl, pyrazosulfuron) weed killer herbicide, sealing effect to broad leaved weed declines rapidly, and the weed killer herbicide of this sulfonylurea now can not meet paddy field prevents and kill off the needs of broad leaved weed.Therefore need to research and develop a kind of weed killer herbicide of efficient control weeds in paddy field, in order to tackle increasingly serious weeds harm.
Summary of the invention
In view of this, the object of the invention is to provide a kind of Herbicidal composition for paddy fields and preparation thereof, makes Herbicidal composition for paddy fields of the present invention to have synergistic effect to the control of grassy weed, broad leaved weed and sedge weed in paddy field.
For realizing object of the present invention, the present invention adopts following technical scheme:
A kind of Herbicidal combinations, by (RS)-2'-[(4, 6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and sulfonyl urea compound composition, described (RS)-2'-[(4, 6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and sulfonyl urea compound weight ratio are 1:10-20:1, described sulfonyl urea compound is ethoxysulfuron, azimsulfuron, uliron is grand, flucarbazone, foramsulfuron, tebuthiuron, flucarbazonesodium, AC322140, chlorimuronethyl, triflusulfuronmethyl, penoxsuam, halosulfuronmethyl, promazine Sulfometuron Methyl, one or more in ethametsulfuron.
Pyrimisulfan, its chemistry (RS)-2'-[(4 by name, 6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN).Structural formula is as follows:
Pyrimisulfan is the novel sulfamido paddy field weed killer herbicide taking Japanese combinatorial chemistry company as main exploitation.This agent has broad weed-killing spectrum, to all also features such as effective of fool proof, active high, antagonism sulfonylurea herbicide weeds of crop and environment.Pyrimisulfan can prevent and kill off transplanting rice Tanaka's the weeds such as various annual weed and needle spikesedge herb, firefly Lin, short arrowhead, Herba Cyperi Glomerati, alisma canaliculatum, pondweed, Chinese celery, wild arrowhead, water chestnut, Japanese Fischer grass, flat bar Fischer grass, the not plump shell grass of rice shape, water silk floss, needle spikesedge herb, firefly Lin, short arrowhead, Herba Cyperi Glomerati and Chinese celery effectively.
The action target of sulfonyl urea compound weed killer herbicide is the acetolactate synthestase (ALS or AHAS) of the synthetic first step reaction of branched-chain amino acid in catalysis plant corpus, this enzyme is subject to the inhibition of sulfonyl urea compound, the biosynthesis of branched-chain amino acid is obstructed, synthetic the stopping of protein will be caused, make the synthetic destroyed of DNA and the requisite material of other mitosis, cause the growth of plant roots, stem, leaf to be suppressed, thereby plant growth is badly damaged until dead.
As preferably, described (RS)-2'-[(4,6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and sulfonyl urea compound weight ratio are 1:5-10:1, more preferably 2:1-5:1.
As preferably, described sulfonyl urea compound is ethoxysulfuron, azimsulfuron or penoxsuam.Further preferably, described (RS)-2'-[(4,6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the weight ratio of the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and ethoxysulfuron is 5:1-10:1; Described (RS)-2'-[(4,6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the weight ratio of the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and azimsulfuron is 3:1-7:1; Described (RS)-2'-[(4,6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the weight ratio of the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and penoxsuam is 1:1-6:1.
Different herbicidal activity components are mixed the difference of rear each active component due to composition, structure, physicochemical property, make the synergy between each active component be typically expressed as synergistic effect, summation action or antagonism.So-called synergistic effect is exactly the mutual synergism between different material, and the effect of its generation is greater than the sum total of each composition effect; And the effect that summation action is exactly its generation equals the sum total of each composition effect; Antagonism refers to that when two kinds of materials act on living organism, a kind of material disturbs the effect of another kind of material, or the effect of interfering with an opponent each other, the phenomenon that general effect is declined.
The present invention is according to Sun Yunpei (Sun Y-P) method, calculate respectively co-toxicity coefficient evaluation (RS)-2'-[(4, 6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and ethoxysulfuron, the mixed effect of azimsulfuron and penoxsuam, result is presented at (RS)-2'-[(4, 6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, when the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and sulfonyl urea compound weight ratio are 1:10-20:1, co-toxicity coefficient is all greater than 120, the mixing use that shows the two has notable synergistic effect.
Therefore, the invention provides the application of described Herbicidal combinations in preparation control rice field grassy weed, sedge weed and broadleaf weed herbicide.
Herbicidal combinations of the present invention can be made into multiple formulation of herbicide, can accept auxiliary material form by percentage composition on the Herbicidal combinations of the present invention that is 1%-90% and pesticidal preparations.As preferably, the percentage composition of described Herbicidal combinations is 10%-85%.Auxiliary material of the present invention comprises the components such as wetting agent, dispersant, disintegrant, adhesive, thickener, emulsifier, solvent, filler and water.
As preferably, described weed killer herbicide is granule, wetting powder or water dispersible granules.
Granule is the granular preparation being processed through pulverizing granulation by pesticide original medicine, auxiliary agent and carrier.Granule has good directionality, without the advantage such as dust from flying, public hazards be little.Prilling process has infusion process, coating method, kneading method, fluidized bed prilling method, spray granulation, rotation comminution granulation etc.
Wetting powder is with pesticide original medicine, inert filler and a certain amount of auxiliary agent, after abundant co-grinding, reaches the formulation of certain particle size in proportion.From in shape, with pulvis indistinction, but owing to having added the auxiliary agent such as wetting agent, dispersant, can be moistening by water after being added in water, disperse, form suspension, can spray and use.
Water dispersible granules claims again dry flowable, water outstanding property granule, adds certain auxiliary agent and carrier by pesticide original medicine, makes through pulverizing, granulation, dry, screening.Enter after water, disintegration automatically, is dispersed into suspension.It is the novel form growing up on the basis of wetting powder and suspending agent, it has that good dispersion, good fluidity, suspensibility are high, good stability, without dust from flying, the feature such as easy to use, production method has mist projection granulating, suspension type granulation, extruder grain, high strength mixing granulation, fluidized bed prilling etc.
Preferably, in granule, the weight percentage of Herbicidal combinations is 10%-72%;
Preferably, in wetting powder, the weight percentage of Herbicidal combinations is 20%-80%;
Preferably, in water dispersible granules, the weight percentage of Herbicidal combinations is 15%-85%.
Preferably prepare in the technical scheme of granule, wetting powder or water dispersible granules in the present invention, described auxiliary material comprises the components such as wetting agent, dispersant, disintegrant, filler (carrier).
Wherein, as preferably, wetting agent of the present invention is selected from alkyl sulfate, alkylbenzenesulfonate, alkylsulfonate, alkylnaphthalene sulfonate, pulls open powder, moistening penetrant t, sorbitan fatty acid ester APEO, Fluhyzon formaldehyde condensation products.
Dispersant of the present invention can be selected from lignosulfonates, Sodium Polyacrylate, di-2-ethylhexylphosphine oxide naphthalene sulfonate, alkyl amine group taurate, polycarboxylate, sodium methylene bis-naphthalene sulfonate formaldehyde condensation products, carboxymethyl cellulose, sodium phosphate trimer, alkylnaphthalene sulfonate condensation polymer.
Disintegrant of the present invention is selected from urea, sodium carboxymethylcellulose, ammonium sulfate, sodium sulphate, silica gel, bentonite, PEG, SF-04, SHX.
Filler of the present invention is selected from kaolin, bentonite, potter's clay, diatomite, white carbon, precipitated calcium carbonate, attapulgite.
Weed killer herbicide field control effectiveness test result of the present invention shows, singly using under the prerequisite of dose lower than two, has significantly improved preventive effect.As can be seen here, Herbicidal composition for paddy fields provided by the invention and preparation thereof have greatly reduced dosage and medication number of times, have the advantages such as safety, efficient, environmental protection, and have delayed the generation of herbicide resistance.
From above technical scheme, Herbicidal combinations of the present invention and preparation thereof are with (RS)-2'-[(4,6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and sulfonyl urea compound are composite as active ingredient, the two mutual supplement with each other's advantages, synergy, delay the generation of herbicide resistance, weeds in paddy field is had to synergistic effect simultaneously, dosage and medication number of times are greatly reduced, there is the advantages such as safety, efficient, environmental protection, can be widely used in the control of rice field crop smothering.
Embodiment
The embodiment of the invention discloses a kind of Herbicidal composition for paddy fields and preparation thereof.Those skilled in the art can use for reference content herein, suitably improve technological parameter and realize.Special needs to be pointed out is, all similar replacements and change apparent to those skilled in the artly, they are all deemed to be included in the present invention.Product of the present invention and method are described by preferred embodiment, and related personnel obviously can change product as herein described in content of the present invention, spirit and scope or suitably change and combination not departing from, and realizes and apply the technology of the present invention.
Weed killer herbicide of the present invention has wider herbicide spectrum, comprise grassy weed, sedge weed and broad leaved weed, as barnyard grass, nutgrass flatsedge, difformed galingale herb, buttercup, moleplant seed, annual bluegrass, lady's-grass, green foxtail, nutgrass flatsedge, Monochoria korsakowii, angustifolia arrowhead herb, water chestnut, pondweed, knotweed, mexicana, beggar-ticks, chickweed, rhizoma alismatis, needle spikesedge herb, Chinese celery, Japanese Fischer grass, flat bar Fischer grass, Procumbent Falsepimpernel, eleusine indica, broad-leaved arm shape grass.Asiatic plantain, three-coloured amaranth, piemarker, black nightshade have good preventive effect.The growth that Herbicidal combinations of the present invention can be used for rice field resists annual and perennial noxious plant, has very wide herbicide spectrum, can prevent and kill off grassy weed, sedge weed, the broad leaved weed of paddy field.The weeds such as sedge family Herba Cyperi Glomerati, difformed galingale herb, cyperus iria, miliary fimbristylis herb, the rhizome of nutgrass flatsedge, kyllinga brevifolia, fescue, firefly Lin, flat stalk Fischer grass, Japanese Fischer grass.This weed killer herbicide also can be prevented and kill off the weeds such as direct seading rice Tanaka's short arrowhead, moleplant seed, barnyard grass, Monochoria korsakowii, mexicana, rhizoma alismatis, chickweed, knotweed and Chinese celery.
In the time that the each active component of the present invention is used jointly, there is superior super addition.The activity of bond is higher than the expection summation of each herbicidal activity of using.Synergy can reduce utilization rate, prevent and treat more broad leaved weed, grassy weed and the sedge of wide range, herbicide effect onset is faster, the duration is longer,, and using phase of can widening better to the control of noxious plant by only using once or several times.Above-mentioned character and advantage be for putting into practice control of weeds to keep in rice field not having undesired competitive plant, thereby guarantee that from quality and quantity angle rice yield level is necessary.With regard to described character, these new Herbicidal combinations have exceeded the state of the art of this area significantly.
Further set forth the present invention below in conjunction with embodiment.
Embodiment 1:10%Pyrimisulfan ethoxysulfuron granule
Pyrimisulfan1 part, 9 parts of ethoxysulfurons, 3 parts of neopelexes, 6 parts of sodium lignin sulfonates, 81 parts of kaolin.
Above-mentioned each active ingredient and raw material are fully mixed, and then granulation, acquisition granule is dried, sieves.
Embodiment 2:30%Pyrimisulfan ethoxysulfuron granule
Pyrimisulfan20 part, 10 parts of ethoxysulfurons, 2 parts of moistening penetrant ts, 5 parts of calcium lignosulfonates, 63 parts, diatomite.
Above-mentioned each active ingredient and raw material are fully mixed, and then granulation, acquisition granule is dried, sieves.
Embodiment 3:70%Pyrimisulfan ethoxysulfuron granule
18 parts of Pyrimisulfan40 parts, 30 parts of ethoxysulfurons, 4 parts of Nekal BXs, NNO8 part, white carbon.
Above-mentioned each active ingredient and raw material are fully mixed, and then granulation, acquisition granule is dried, sieves.
Embodiment 4:12%Pyrimisulfan azimsulfuron granule
Pyrimisulfan2 part, 10 parts of azimsulfurons, K123 part, 5 parts of sodium phosphate trimers, 80 parts of kaolin.
Above-mentioned each active ingredient and raw material are fully mixed, and then granulation, acquisition granule is dried, sieves.
Embodiment 5:33%Pyrimisulfan azimsulfuron granule
Pyrimisulfan3 part, 30 parts of azimsulfurons, 5 parts of neopelexes, 9 parts of carboxymethyl celluloses, 53 parts of kaolin.
Above-mentioned each active ingredient and raw material are fully mixed, and then granulation, acquisition granule is dried, sieves.
Embodiment 6:63%Pyrimisulfan azimsulfuron granule
Pyrimisulfan54 part, 9 parts of azimsulfurons, 3 parts of penetrating agent JFCs, 7 parts of Sodium Polyacrylates, 27 parts of precipitated calcium carbonates.
Above-mentioned each active ingredient and raw material are fully mixed, and then granulation, acquisition granule is dried, sieves.
Embodiment 7:15%Pyrimisulfan penoxsuam granule
Pyrimisulfan10 part, 5 parts of penoxsuams, 5 parts of neopelexes, 10 parts of sodium lignin sulfonates, 70 parts of attapulgites.
Above-mentioned each active ingredient and raw material are fully mixed, and then granulation, acquisition granule is dried, sieves.
Embodiment 8:43%Pyrimisulfan penoxsuam granule
Pyrimisulfan30 part, 13 parts of penoxsuams, 3 parts of moistening penetrant ts, 6 parts of sodium lignin sulfonates, 48 parts, diatomite.
Above-mentioned each active ingredient and raw material are fully mixed, and then granulation, acquisition granule is dried, sieves.
Embodiment 9:72%Pyrimisulfan penoxsuam granule
Pyrimisulfan60 part, 12 parts of penoxsuams, 4 parts of neopelexes, 8 parts of carboxymethyl celluloses, 16 parts of kaolin.
Above-mentioned each active ingredient and raw material are fully mixed, and then granulation, acquisition granule is dried, sieves.
Embodiment 10:21%Pyrimisulfan ethoxysulfuron wetting powder
Pyrimisulfan20 part, 1 part of ethoxysulfuron, 3 parts of moistening penetrant ts, 7 parts of calcium lignosulfonates, 69 parts of precipitated calcium carbonates.
By above-mentioned each active ingredient with raw material fully mixes, air-flow crushing obtains wetting powder.
Embodiment 11:40%Pyrimisulfan ethoxysulfuron wetting powder
Pyrimisulfan30 part, 10 parts of ethoxysulfurons, K123 part, 6 parts of carboxymethyl celluloses, 51 parts of kaolin.
By above-mentioned each active ingredient with raw material fully mixes, air-flow crushing obtains wetting powder.
Embodiment 12:80%Pyrimisulfan ethoxysulfuron wetting powder
Pyrimisulfan70 part, 10 parts of ethoxysulfurons, 4 parts of moistening penetrant ts, 8 parts of Sodium Polyacrylates, 8 parts, diatomite.
By above-mentioned each active ingredient with raw material fully mixes, air-flow crushing obtains wetting powder.
Embodiment 13:23%Pyrimisulfan azimsulfuron wetting powder
62 parts of Pyrimisulfan20 parts, 3 parts of azimsulfurons, 5 parts of polysorbate60s, PVA10 part, white carbon.
By above-mentioned each active ingredient with raw material fully mixes, air-flow crushing obtains wetting powder.
Embodiment 14:42%Pyrimisulfan azimsulfuron wetting powder
47 parts of Pyrimisulfan40 parts, 2 parts of azimsulfurons, SOPA4 part, NNO7 part, bentonite.
By above-mentioned each active ingredient with raw material fully mixes, air-flow crushing obtains wetting powder.
Embodiment 15:76%Pyrimisulfan azimsulfuron wetting powder
15 parts of Pyrimisulfan60 parts, 16 parts of azimsulfurons, 3 parts of neopelexes, MF6 part, precipitated calcium carbonate.
By above-mentioned each active ingredient with raw material fully mixes, air-flow crushing obtains wetting powder.
Embodiment 16:22%Pyrimisulfan penoxsuam wetting powder
68 parts of Pyrimisulfan2 parts, 20 parts of penoxsuams, 3 parts of lauryl sodium sulfate, NO7 part, kaolin.
By above-mentioned each active ingredient with raw material fully mixes, air-flow crushing obtains wetting powder.
Embodiment 17:36%Pyrimisulfan penoxsuam wetting powder
Pyrimisulfan30 part, 6 parts of penoxsuams, 5 parts of moistening penetrant ts, 10 parts of sodium carboxymethylcelluloses, 49 parts of precipitated calcium carbonates.
By above-mentioned each active ingredient with raw material fully mixes, air-flow crushing obtains wetting powder.
Embodiment 18:47%Pyrimisulfan penoxsuam wetting powder
Pyrimisulfan40 part, 7 parts of penoxsuams, 3 parts of Nekal BXs, 7 parts of sodium lignin sulfonates, 43 parts of kaolin.
By above-mentioned each active ingredient with raw material fully mixes, air-flow crushing obtains wetting powder
Embodiment 19:15%Pyrimisulfan ethoxysulfuron water dispersible granules
Pyrimisulfan5 part, 10 parts of ethoxysulfurons, 3 parts of Nekal BXs, 6 parts of Dispersant MFs, 1 part, urea, 75 parts of white carbons.
Above-mentioned each active ingredient and raw material are fully mixed, pulverized, kneading, granulation, dry, screening obtains water dispersible granules.
Embodiment 20:45%Pyrimisulfan ethoxysulfuron water dispersible granules
49 parts of Pyrimisulfan30 parts, 15 parts of ethoxysulfurons, Morwet D-4252 part, Morwet EFW4 part, kaolin.
Above-mentioned each active ingredient and raw material are fully mixed, pulverized, kneading, granulation, dry, screening obtains water dispersible granules.
Embodiment 21:75%Pyrimisulfan ethoxysulfuron water dispersible granules
16 parts of Pyrimisulfan55 parts, 20 parts of ethoxysulfurons, SP-28363 part, SP-2845W6 part, precipitated calcium carbonate.
Above-mentioned each active ingredient and raw material are fully mixed, pulverized, kneading, granulation, dry, screening obtains water dispersible granules.
Embodiment 22:20%Pyrimisulfan azimsulfuron water dispersible granules
Pyrimisulfan15 part, 5 parts of azimsulfurons, 5 parts of Nekal BXs, 8 parts of sodium lignin sulfonates, 1 part, urea, 66 parts of white carbons.
Above-mentioned each active ingredient and raw material are fully mixed, pulverized, kneading, granulation, dry, screening obtains water dispersible granules.
Embodiment 23:54%Pyrimisulfan azimsulfuron water dispersible granules
Pyrimisulfan44 part, 10 parts of azimsulfurons, 3 parts of lauryl sodium sulfate, 6 parts of carboxymethyl celluloses, 2 parts, ammonium sulfate, 35 parts of precipitated calcium carbonates.
Above-mentioned each active ingredient and raw material are fully mixed, pulverized, kneading, granulation, dry, screening obtains water dispersible granules.
Embodiment 24:85%Pyrimisulfan azimsulfuron water dispersible granules
2 parts of Pyrimisulfan75 parts, 10 parts of azimsulfurons, 4 parts of penetrating agent JFCs, 8 parts of sodium lignin sulfonates, PEG1 part, kaolin.
Above-mentioned each active ingredient and raw material are fully mixed, pulverized, kneading, granulation, dry, screening obtains water dispersible granules.
Embodiment 25:25%Pyrimisulfan penoxsuam water dispersible granules
Pyrimisulfan20 part, 5 parts of penoxsuams, 4 parts of lauryl sodium sulfate, 9 parts of calcium lignosulfonates, 1 part, urea, 61 parts of bentonites.
Above-mentioned each active ingredient and raw material are fully mixed, pulverized, kneading, granulation, dry, screening obtains water dispersible granules.
Embodiment 26:53%Pyrimisulfan penoxsuam water dispersible granules
Pyrimisulfan50 part, 3 parts of penoxsuams, SOPA4 part, 7 parts of sodium phosphate trimers, 1 part, urea, 35 parts of kaolin.
Above-mentioned each active ingredient and raw material are fully mixed, pulverized, kneading, granulation, dry, screening obtains water dispersible granules.
Embodiment 27:84%Pyrimisulfan penoxsuam water dispersible granules
8 parts of Pyrimisulfan80 parts, 4 parts of penoxsuams, 2 parts of neopelexes, 5 parts of Sodium Polyacrylates, PDG1 part, kaolin.
Above-mentioned each active ingredient and raw material are fully mixed, pulverized, kneading, granulation, dry, screening obtains water dispersible granules.
Embodiment 28: Toxicity Determination test
In order further to understand Pyrimisulfan and the synergy of sulfonyl urea compound mixture to weeds, carry out following test the mixture of Pyrimisulfan and sulfonylurea herbicide has been carried out to formula screening, taking ethoxysulfuron, azimsulfuron, penoxsuam as example, formula screening.
Test method: according to mixture object, serial proportioning is set, each proportioning arranges 5-7 concentration gradient.Weeds are cultured to the 2-3 leaf phase for subsequent use.After the weeds cauline leaf of the number of finishing is processed, calculate preventive effect, then calculate concentration EC in inhibition by method of least squares
50(95% confidence interval), then calculate co-toxicity coefficient (CTC) by the abundant method of Sun Yun.
Actual measurement toxicity index (ATI)=(standard medicament EC50/ reagent agent EC50) × 100
Theoretical toxicity index (TTI)=(percentage composition of A in toxicity index × mixture of A)+(percentage composition of B in toxicity index × mixture of B)
Co-toxicity coefficient (CTC)=[the theoretical virulence coefficient of mixture actual measurement virulence coefficient (ATI)/mixture (TTI)] × 100
Co-toxicity coefficient (CTC) >=120 shows as synergistic effect; Co-toxicity coefficient (CTC)≤80 shows as antagonism; 80< co-toxicity coefficient (CTC) <120 shows as summation action.
Testing result is in table 1, table 2 and table 3.
Table 1Pyrimisulfan and ethoxysulfuron are measured the synergy of grassy weed, sedge weed and broad leaved weed
Table 2Pyrimisulfan and azimsulfuron are measured the synergy of grassy weed, sedge weed and broad leaved weed
Table 3Pyrimisulfan and penoxsuam are measured the synergy of grassy weed, sedge weed and broad leaved weed
From the measurement result of table 1, table 2 and table 3, in the time that Pyrimisulfan and ethoxysulfuron, azimsulfuron, penoxsuam weight ratio are 1:10-20:1, co-toxicity coefficient is all greater than 120, has obvious synergistic effect.
Embodiment 29: field control effectiveness test
The product making with each single dose 10%Pyrimisulfan wetting powder, 15% ethoxysulfuron water dispersible granules, 50% azimsulfuron water dispersible granules, 25g/L penoxsuam oil-suspending agent and the embodiment of the present invention 21, embodiment 23, embodiment 25 is respectively to stems and leaves of rice spraying processing, after medicine, 20d adds up the preventive effect to weeds, the results are shown in Table 4, table 5 and table 6.
Table 4 weed killer herbicide of the present invention and single dose weed killer herbicide preventive effect contrast (%)
Table 5 weed killer herbicide of the present invention and single dose weed killer herbicide preventive effect contrast (%)
Table 6 weed killer herbicide of the present invention and single dose weed killer herbicide preventive effect contrast (%)
From the field control effectiveness test of table 4, table 5 and table 6, be less than under the prerequisite of single amount of application in the each effective ingredient consumption of weed killer herbicide of the present invention, grassy weed is significantly improved with preventive effect and the integrated control effect of, sedge weed and broad leaved weed, this is consistent with Toxicity Determination result of the test, has obvious synergistic effect.
The explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (8)
1. a Herbicidal composition for paddy fields, it is characterized in that, by (RS)-2'-[(4, 6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and sulfonyl urea compound composition, described (RS)-2'-[(4, 6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and sulfonyl urea compound weight ratio are 1:10-20:1, described sulfonyl urea compound is ethoxysulfuron, azimsulfuron, one in penoxsuam.
2. Herbicidal combinations according to claim 1, it is characterized in that, described (RS)-2'-[(4,6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and sulfonyl urea compound weight ratio are 1:5-10:1.
3. Herbicidal combinations according to claim 1, it is characterized in that, described (RS)-2'-[(4,6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the weight ratio of the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and ethoxysulfuron is 5:1-10:1.
4. Herbicidal combinations according to claim 1, it is characterized in that, described (RS)-2'-[(4,6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the weight ratio of the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and azimsulfuron is 3:1-7:1.
5. Herbicidal combinations according to claim 1, it is characterized in that, described (RS)-2'-[(4,6-dimethoxypyridin-2-yl) (hydroxyl) methyl]-1, the weight ratio of the fluoro-6'-of 1-bis-(methoxy) methane benzene sulfanilamide (SN) and penoxsuam is 1:1-6:1.
6. the application of Herbicidal combinations in preparation control rice field grassy weed, sedge weed and broadleaf weed herbicide described in claim 1-5 any one.
7. a weed killer herbicide, is characterized in that, can accept auxiliary material described in the claim 1-5 any one that is 1%-90% form by weight percentage on Herbicidal combinations and pesticidal preparations.
8. weed killer herbicide according to claim 7, is characterized in that, described weed killer herbicide is granule, wetting powder or water dispersible granules.
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Cited By (2)
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| CN105284848A (en) * | 2014-07-24 | 2016-02-03 | 江苏龙灯化学有限公司 | Weeding composition |
| WO2016115883A1 (en) * | 2015-01-19 | 2016-07-28 | Jiangsu Rotam Chemistry Co., Ltd. | A herbicidal composition and method of controlling plant growth |
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| WO2016017547A1 (en) * | 2014-07-30 | 2016-02-04 | 日産化学工業株式会社 | Solid agrochemical composition |
| CN104304297B (en) * | 2014-10-26 | 2016-05-11 | 山东滨农科技有限公司 | A kind of Herbicidal combinations of Han You oxazole acyl grass amine |
| CN104542667A (en) * | 2014-12-26 | 2015-04-29 | 北京燕化永乐生物科技股份有限公司 | Herbicidal composition |
| CN105409993A (en) * | 2015-11-05 | 2016-03-23 | 北京燕化永乐生物科技股份有限公司 | Weeding composition |
| CN107027791A (en) * | 2017-03-08 | 2017-08-11 | 南京华洲药业有限公司 | The Herbicidal combinations of a kind of Sulfometuron Methyl containing promazine and benzobicylon and its application |
| CN106922717A (en) * | 2017-03-08 | 2017-07-07 | 南京华洲药业有限公司 | A kind of Herbicidal combinations of Sulfometuron Methyl containing promazine with ethoxysulfuron and its application |
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