CN102812962A - Rice-field weeding composition and preparation thereof - Google Patents
Rice-field weeding composition and preparation thereof Download PDFInfo
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- CN102812962A CN102812962A CN2012103356127A CN201210335612A CN102812962A CN 102812962 A CN102812962 A CN 102812962A CN 2012103356127 A CN2012103356127 A CN 2012103356127A CN 201210335612 A CN201210335612 A CN 201210335612A CN 102812962 A CN102812962 A CN 102812962A
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Abstract
The invention belongs to the field of pesticide preparation, and discloses a rice-field weeding composition. The rice-field weeding composition consists of orthosulfamuron and mefenacet. The invention also discloses a rice-field weedicide which consists of the weeding composition and an auxiliary material accepted by pesticide preparation, wherein the weight ratio of the weeding composition to the weedicide is 1-90%. By using the composition formed by mixing the orthosulfamuron and the mefenacet according to a certain proportion, the generation of pesticide resistance of weeds in a rice field is delayed, the dosage is reduced, most weeds in the rice field can be controlled, and particularly, worst weeds such as sagittaria trifolia, rhizome alismatis, sheathed monochoria herb and rice millet in the rice field can be controlled.
Description
Technical field
The present invention relates to the pesticidal preparations field, relate to a kind of Herbicidal composition for paddy fields and preparation thereof specifically.
Background technology
Paddy rice is the annual gramineae plant, produces and spreads all over each continent except that the South Pole, and paddy rice is not only the main cereal crops of China, also is one of world's staple food crop.About 1.45 hundred million hectares of whole world paddy rice cultivated area.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 all rice of China do the rice field in district, always have crop smothering in various degree to take place.Wherein, medium crop smothering area accounts for 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, more than 200 hundred million kilograms in annual thus loss grain.Therefore, the domestic rice field weed killer herbicide that is widely used avoids paddy rice because of the weeds underproduction.
Rice field sealing weeding makes weeds in paddy field group that obvious variation take place owing to using a certain type of weed killer herbicide such as pyrazosulfuron, bensulfuron-methyl and the change of rice field cropping system, the introducing of new varieties for many years continuously, and the weeds in paddy field bamboo telegraph also constantly spreads; Pesticide resistance strengthens; Harm increases the weight of, especially angustifolia arrowhead herb (donkey ear dish), rhizoma alismatis (water-white dish), Monochoria korsakowii broad leaved weeds such as (orchid dishes), and its fertility is strong; Diffusion velocity is fast; Harm is heavy, has become the de novo malignant weed in rice field in recent years, causes the serious underproduction of paddy rice.In recent years; Constantly strengthen like the pesticide resistance of weeds in paddy field such as angustifolia arrowhead herb, rhizoma alismatis, Monochoria vaginalis, Monochoria korsakowii sulfonylurea (especially bensulfuron-methyl, pyrazosulfuron) weed killer herbicide; Sulfonylurea herbicide descends rapidly to the sealing effect of weeds in paddy field, and the product of this sulfonylurea can not satisfy the needs of rice field management of weeds at present.
Phonetic aniline sulphur is grand to be the amine sulfonylurea herbicide of Isagro and the exploitation of RiceCo company, and before the seedling, be used to prevent and kill off paddy field broad leaved weed, nutgrass flatsedge and Gramineae ruderal behind the seedling, its mechanism of action is the acetolactate synthestase (ALS) through the inhibition weeds.Synthesizing of the branched-chain amino acid of prevention plant, thus the synthetic of weeds protein stoped, the weeds cell division is stopped, last weeds are withered.This medicine can be through leaf, root absorption.Got permission registration and sale in the U.S. first, and be used for agent for removing grass in paddy field in 2007.Paddy field barnyard grass grass, nutgrass flatsedge and broad leaved weed there is preventive effect preferably; Excellent performance; Can substitute the pyrazosulfuron, the bensulfuron-methyl that used in more than 20 year always and prevent and kill off paddy field broad leaved weed, sedge weed, weeds are eased to the resistance problem of pyrazosulfuron, bensulfuron-methyl.
Weed killer herbicide can be protected the growth of crops better efficiently; Though the effect that phonetic aniline sulphur swells on the control weeds in paddy field is pretty good; But its control efficiency can't farthest protect crops not receive the infringement of weeds; And use for a long time that phonetic aniline sulphur is grand also can be prone to produce resistance as pyrazosulfuron, bensulfuron-methyl, therefore a kind of Herbicidal composition for paddy fields novel, that have higher control efficiency need be provided, so that cover crop avoids the infringement of weeds in paddy field better.
Summary of the invention
In view of this, the object of the invention provides a kind of Herbicidal composition for paddy fields and preparation thereof, makes the present composition and preparation thereof can improve the preventive effect to rice field common weeds such as angustifolia arrowhead herb, rhizoma alismatis, Monochoria vaginalis, Monochoria korsakowii, rice barnyard grasses, has synergistic effect.
For realizing the object of the invention, the present invention adopts following technical scheme:
A kind of Herbicidal composition for paddy fields is formed with mefenacet by phonetic aniline sulphur is grand.
Wherein, the grand weight ratio with mefenacet of said phonetic aniline sulphur is preferably 1:1-30, further is preferably 1:5-25, and more preferably 1:9-20 most preferably is 1:9-12.
Phonetic aniline sulphur is grand, chemistry 1-(4,6-dimethoxypyridin-2-yl) by name-3-［ 2-(formyl-dimethylamino) phenylsulfamoyl base ］ urea, and its mechanism of action is through suppressing the acetolactate synthestase (ALS) of weeds.Synthesizing of the branched-chain amino acid of prevention plant, thus the synthetic of weeds protein stoped, the weeds cell division is stopped, last weeds are withered.Paddy field barnyard grass grass, nutgrass flatsedge and broad leaved weed there is preventive effect preferably.
Mefenacet is a selectivity inner sucting conduction type acyl aniline herbicide, is cell growth and division inhibitor, and the division of the former mother cell of children is had strong especially inhibitory action.Main through bud scale and root absorption, conduct to young shoot and the tender leaf of weeds through xylem and phloem, stop weed growth point cell division to be extended,, grassy weed (barnyard grass is careless) accumulates in the growing point place very soon after contacting this medicine.Pair cell particularly mother cell plays inhibition cell division, increase, thereby hinders the careless growth of barnyard grass until death.Can effectively prevent and kill off grassy weed, the barnyard grass grass is had special efficacy in rudiment to the 2 leaf phase.In addition, it also has certain preventive effect to moleplant seed, needle spikesedge herb, wartwort, Monochoria vaginalis, mexicana, special-shaped nutgrass flatsedge, flat nutgrass flatsedge, cyperus iria and aquatic for many years nutgrass flatsedge.
The present invention also provides a kind of herbicides for use in paddy, can accept auxiliary material by Herbicidal combinations according to the invention and pesticidal preparations and form.
Wherein, to account for the percentage by weight of said weed killer herbicide be 1-90% to said Herbicidal combinations.
According to method known in those skilled in the art, the present invention can be made into agricultural and goes up any formulation of acceptable, and the preferred formulation formulation is water dispersible granules and wetting powder.
Wherein, When formulation is wetting powder; The mass percent that said Herbicidal combinations accounts for wetting powder is preferably 20-40%; Other wetting powder auxiliary materials get final product according to conventional selection the in this area, can be selected from TERWET 1004, SP-2845W, Morwet EFW, EMPICOL LX/B, draw back powder, lauryl sodium sulfate, dodecyl sodium naphthalene sulfonate, neopelex, calcium dodecyl benzene sulfonate etc. like wetting agent; Dispersant can be selected from Morwet D-425, Morwet D-500, SP-2836, TERSPERSE 2700, TERSPERSE 2425, DEHSCOFIX 920, sodium methylene bis-naphthalene sulfonate, dispersing agent MF, sodium lignin sulfonate, calcium lignosulfonate, carboxymethyl cellulose etc.; Carrier can be selected from kaolin, bentonite, potter's clay, diatomite, white carbon, precipitated calcium carbonate etc.
When formulation is water dispersible granules; The percentage by weight that said Herbicidal combinations accounts for water dispersible granules is preferably 50-80%; Other water dispersible granules auxiliary materials get final product according to conventional selection the in this area, can be selected from TERWET 1004, SP-2845W, Morwet EFW, EMPICOL LX/B, draw back powder, lauryl sodium sulfate, dodecyl sodium naphthalene sulfonate, neopelex, calcium dodecyl benzene sulfonate etc. like wetting agent; Dispersant can be selected from Morwet D-425, Morwet D-500, SP-2836, TERSPERSE 2700, TERSPERSE 2425, DEHSCOFIX 920, sodium methylene bis-naphthalene sulfonate, dispersing agent MF, sodium lignin sulfonate, calcium lignosulfonate, carboxymethyl cellulose etc.; Carrier can be selected from kaolin, bentonite, potter's clay, diatomite, white carbon, precipitated calcium carbonate etc.
Different herbicidal activity components mix each active component of back because the difference of composition, structure, physicochemical property makes that the synergy between each active component is 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 being exactly the effect of its generation, summation action equals the sum total of each composition effect; Antagonism is meant that a kind of material disturbed the effect of another kind of material when two kinds of materials acted on living organism, or the effect of interfering with an opponent each other, the phenomenon that general effect is descended.
The present invention is swelled phonetic aniline sulphur with different proportionings and is mixed with mefenacet, detects its synergy to weeds, i.e. Toxicity Determination; The result shows; Grand and the mefenacet proportioning of phonetic aniline sulphur is between 1:1-30, and co-toxicity coefficient has synergistic effect all greater than 120.
The rice field weed control test has been carried out in weed killer herbicide according to the invention and each single agent; The result shows; Under the prerequisite of weed killer herbicide effective ingredient consumption according to the invention single agent effective ingredient consumption smaller or equal to each; The drug effect of controlling weeds of the present invention is higher than each single agent, shows that each active component does not have cross tolerance in the weed killer herbicide according to the invention, and control efficiency has synergistic effect.
Therefore, Herbicidal combinations according to the invention can be applied in the control weeds in paddy field and prepare in the herbicides for use in paddy.Wherein, said weeds in paddy field is preferably angustifolia arrowhead herb, rhizoma alismatis, Monochoria vaginalis, Monochoria korsakowii or rice barnyard grass.
Can know that by above technical scheme the weeds preventive effect of Herbicidal combinations according to the invention and preparation thereof significantly improves, and has the notable synergistic effect; And reduce the consumption of active ingredient; Delay the drug-fast generation of weeds, reduce pollution, can be widely used in agriculture field environment.
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 this paper content, suitably improve technological parameter and realize.Special needs to be pointed out is that all similarly replace and change apparent to those skilled in the art, they all are regarded as and are included in the present invention.Product of the present invention is described through preferred embodiment, and the related personnel obviously can change or suitably change and combination product as herein described in not breaking away from content of the present invention, spirit and scope, realizes and use technology of the present invention.
In order further to understand the present invention, a kind of Herbicidal composition for paddy fields provided by the invention and preparation thereof are elaborated below in conjunction with embodiment.
The phonetic aniline sulphur of embodiment 1:20% swells the mefenacet wetting powder
Phonetic aniline sulphur is grand 10%, mefenacet 10%, EMPICOL LX/B 2.0%, DEHSCOFIX9203.0%, precipitated calcium carbonate supply 100%, through comminution by gas stream, fully mix, promptly obtains the grand mefenacet wetting powder of 20% phonetic aniline sulphur.
The phonetic aniline sulphur of embodiment 2:30% swells the mefenacet wetting powder
Phonetic aniline sulphur is grand 5%, mefenacet 25%, Morwet EFW 1.2%, Morwet D-4253.5%, kaolin supply 100%, through comminution by gas stream, fully mix, promptly obtains the grand mefenacet wetting powder of 30% phonetic aniline sulphur.
The phonetic aniline sulphur of embodiment 3:40% swells the mefenacet wetting powder
Phonetic aniline sulphur is grand 3%, mefenacet 37%, NNO 7%, lauryl sodium sulfate 3%, kaolin supply 100%, through comminution by gas stream, fully mix, promptly obtains the grand mefenacet wetting powder of 40% phonetic aniline sulphur.
The phonetic aniline sulphur of embodiment 4:50% swells the mefenacet water dispersible granules
Phonetic aniline sulphur is grand 5%, mefenacet 45%, TERWET 10041.2%, TERSPERSE 27004.5%, diatomite supply 100%; Through comminution by gas stream, fully mixing, kneading granulation, drying and screening, promptly get the grand mefenacet water dispersible granules of 50% phonetic aniline sulphur.
The phonetic aniline sulphur of embodiment 5:60% swells the mefenacet water dispersible granules
Phonetic aniline sulphur is grand 3%, mefenacet 57%, Morwet EFW 1.5%, Morwet D-4253.5%, kaolin supply 100%; Through comminution by gas stream, fully mixing, kneading granulation, drying and screening, promptly obtain the grand mefenacet water dispersible granules of 60% phonetic aniline sulphur.
The phonetic aniline sulphur of embodiment 6:80% swells the mefenacet water dispersible granules
Phonetic aniline sulphur is grand 3%, mefenacet 77%, TERWET 10041.5%, TERSPERSE 27004.2%, TERSPERSE 24251.0%, kaolin supply 100%.Through comminution by gas stream, fully mixing, kneading granulation, drying and screening, can obtain the grand mefenacet water dispersible granules of 80% phonetic aniline sulphur.
Embodiment 7: Toxicity Determination
Phonetic aniline sulphur is grand to be mixed to the synergy of weeds with mefenacet in order further to understand, and carries out following test grand being mixed with mefenacet of phonetic aniline sulphur carried out the prescription screening.
Test method: according to the purpose that is mixed serial proportioning is set, each proportioning is provided with 5-7 concentration gradient.It is subsequent use that angustifolia arrowhead herb is cultured to the 2-3 leaf phase.After the weeds cauline leaf processing with the number of finishing, calculate preventive effect, calculate concentration EC in the inhibition with method of least squares then
50(95% confidence interval) calculated co-toxicity coefficient (CTC) with the abundant method of Sun Yun again.
Co-toxicity coefficient (CTC)>=120 shows as synergistic effect; Co-toxicity coefficient (CTC)≤80 shows as antagonism;<120 show as summation action to 80<co-toxicity coefficient (CTC).
Actual measurement toxicity index (ATI)=(standard medicament EC
50/ confession reagent agent EC
50) * 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)=［ mixture actual measurement virulence coefficient (the ATI)/theoretical virulence coefficient (TTI) of mixture ］ * 100
The phonetic aniline sulphur of the different proportionings of table 1 is grand to be measured the synergy of angustifolia arrowhead herb with mefenacet
Mensuration result shows, the grand and mefenacet proportioning of phonetic aniline sulphur is between 1:1-1:30, and co-toxicity coefficient has synergistic effect greater than 120.
Embodiment 8: the control of weeds test
Weed killer herbicide and the grand WDG of commercially available 50% phonetic aniline sulphur, the 50% mefenacet WDG of embodiment 1-6 are carried out the control test of weeds, and experimental condition, environment facies carry out the cauline leaf spray pesticide in the paddy rice 1-3 leaf phase together.Wherein, 50% phonetic aniline sulphur swells WDG effective ingredient consumption 10g/ mu, and 50% mefenacet WDG effective ingredient consumption is a 35g/ mu, and each embodiment effective ingredient consumption is a 10g/ mu.The preventive effect result that 30d adds up respectively angustifolia arrowhead herb, rhizoma alismatis, Monochoria vaginalis, rice barnyard grass behind the medicine sees table 2.
The test of table 2 control of weeds
Can know by table 2; Under the prerequisite of weed killer herbicide effective ingredient consumption according to the invention single agent effective ingredient consumption smaller or equal to each; The present invention is all high than single agent to the preventive effect of rice field common weeds such as angustifolia arrowhead herb, rhizoma alismatis, Monochoria vaginalis, Monochoria korsakowii, rice barnyard grass, shows that weed killer herbicide control efficiency according to the invention has synergistic effect, can reduce dosage; Reduce cost, environmentally friendly.
The explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle 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 claim of the present invention.
Claims (10)
1. a Herbicidal composition for paddy fields is characterized in that, forms with mefenacet by phonetic aniline sulphur is grand.
2. according to the said Herbicidal combinations of claim 1, it is characterized in that the grand weight ratio with mefenacet of said phonetic aniline sulphur is 1:1-30.
3. according to the said Herbicidal combinations of claim 2, it is characterized in that the grand weight ratio with mefenacet of said phonetic aniline sulphur is 1:5-25.
4. according to the said Herbicidal combinations of claim 3, it is characterized in that the grand weight ratio with mefenacet of said phonetic aniline sulphur is 1:9-20.
5. according to the said Herbicidal combinations of claim 4, it is characterized in that the grand weight ratio with mefenacet of said phonetic aniline sulphur is 1:9-12.
6. the application of any said Herbicidal combinations of claim 1-5 in the control weeds in paddy field.
7. according to the said application of claim 6, it is characterized in that said weeds in paddy field is angustifolia arrowhead herb, rhizoma alismatis, Monochoria vaginalis, Monochoria korsakowii or rice barnyard grass.
8. the application of any said Herbicidal combinations of claim 1-5 in the preparation herbicides for use in paddy.
9. a herbicides for use in paddy is characterized in that, is made up of acceptable auxiliary material on any said Herbicidal combinations of claim 1-5 and the pesticidal preparations, and the percentage by weight that said Herbicidal combinations accounts for said weed killer herbicide is 1-90%.
10. according to the said weed killer herbicide of claim 9, it is characterized in that it is wetting powder or water dispersible granules.
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| CN2012103356127A CN102812962A (en) | 2012-09-12 | 2012-09-12 | Rice-field weeding composition and preparation thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105104405A (en) * | 2015-09-30 | 2015-12-02 | 河南科技学院 | Weeding composition containing triflusulfuron-methyl and mefenacet |
| CN103766173B (en) * | 2014-01-08 | 2015-12-30 | 湖南省植物保护研究所 | A kind of method of preventing and kill off direct sowing rice field Herbicide-resistant weeds |
| CN106489975A (en) * | 2015-09-07 | 2017-03-15 | 江苏龙灯化学有限公司 | A kind of Herbicidal combinations |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101578046A (en) * | 2006-12-11 | 2009-11-11 | 伊萨格罗股份公司 | Herbicidal compositions |
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2012
- 2012-09-12 CN CN2012103356127A patent/CN102812962A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101578046A (en) * | 2006-12-11 | 2009-11-11 | 伊萨格罗股份公司 | Herbicidal compositions |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103766173B (en) * | 2014-01-08 | 2015-12-30 | 湖南省植物保护研究所 | A kind of method of preventing and kill off direct sowing rice field Herbicide-resistant weeds |
| CN106489975A (en) * | 2015-09-07 | 2017-03-15 | 江苏龙灯化学有限公司 | A kind of Herbicidal combinations |
| CN105104405A (en) * | 2015-09-30 | 2015-12-02 | 河南科技学院 | Weeding composition containing triflusulfuron-methyl and mefenacet |
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Application publication date: 20121212 |