CN1934946A - Grass lawn herbicide and its preparing method - Google Patents
Grass lawn herbicide and its preparing method Download PDFInfo
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- CN1934946A CN1934946A CNA2006101070524A CN200610107052A CN1934946A CN 1934946 A CN1934946 A CN 1934946A CN A2006101070524 A CNA2006101070524 A CN A2006101070524A CN 200610107052 A CN200610107052 A CN 200610107052A CN 1934946 A CN1934946 A CN 1934946A
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- fluorine
- propionic acid
- lawn
- tears propionic
- grass
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Abstract
The present invention relates to a lawn weedicide and its preparation method. The composition of said lawn weedicide includes (by wt%) 1-50% of alpha-bifluoropropanoic acid, 1-20% of fenchlorazole, 5-10% of synergistic agent and the rest is adjuvant. Its preparation method includes the following steps: synthesizing monofluoride, synthesizing bifluoride, dissolving three kinds of isomer compounds in acetylacetone, separating to obtain alpha-bifluroropropanoic acid solution, mixing alpha-bifluoropropanoic acid, fenchlorazole, bromoxynil and adjuvant, stirring them uniformly so as to obtain the invented weedicide.
Description
Technical field:
The present invention relates to a kind of weed killer herbicide, particularly a kind of grass lawn herbicide and preparation method thereof.
Background technology:
At present, domestic lawn area is increasing, in the lawn weeds prevent and kill off a difficult problem that becomes turf management personnel maximum, mostly be artificial uprooting weed, have high input, efficient is low, weak effect.Weeds in the lawn can be divided three classes: i.e. broad leaved weed, sedge weed, grassy weed.Lawn chemical weeding field at home, it is few efficiently to prevent and kill off the medicament of grassy weed at Gramineae lawn at present.Since nineteen ninety-eight, there is the expert to be recommended in the Gramineae lawn to use cornfield herbicidal essence (height) fenoxaprop-P to prevent and kill off grassy weeds such as wherein lady's-grass, eleusine indica, barnyard grass grass, the experiment proved that, this medicament is only effective to the following grassy weed of 3 leaves, and poison bigger to annual bluegrass class, bent grass class lawn, make the lawn root system development be subjected to severe inhibition, lawn fresh weight and plant height are subjected to suppress obviously, blade performance is rubescent, tangible symptom of chemical damage such as flavescence even death, poisons the tall fescue turf performance is slight (strengthening water and fertilizer management can recover about 15 days).Smart (height) fenoxaprop-P is used for the lawn weeding, and because of its poor safety performance, and herbicidal effect is limited, the market of fading out gradually.Also there is the expert to recommend to use herbicides for use in paddy two chloroquine phosphoric acid to prevent and kill off grassy weed in the Gramineae lawn, but this agent is invalid to the bigger eleusine indica of quantity in the lawn, to the lady's-grass weak effect, only the barnyard grass grass to negligible amounts in the lawn has special efficacy, therefore can not satisfy turf management personnel's demand far away.Even if like this, the Lou Xiaoming of Huagang Administrative Office, Hangzhou City Bureau of Gardens Cultural Relic, Wu Changxing etc. have still declared tall fescue turf herbicides special prescription with essence (height) fenoxaprop-P, at present, do not see popularization on the market.
How effectively to prevent and kill off at grass family malignant weeds such as the lady's-grass in Gramineae lawn annual bluegrass class, fescue grass class, perennial ryegrass class, Manila class, the bent grass class, eleusine indica, green foxtail, barnyard grass grass, speedwell, india lovegrass, moleplant seeds, become the problem that the turf management personnel have a headache the most, also become to restrict the key issue of lawn maintenance quality, quality, develop and spread is effectively prevented and kill off the weed killer herbicide of above the average age for marriage grassy weed in Gramineae lawn, be the extremely urgent demands of turf management personnel.
Summary of the invention:
The purpose of this invention is to provide a kind of grass lawn herbicide and preparation method thereof, the weed killer herbicide that uses this preparation method to obtain is good to grass family malignant weed preventive effects such as the lady's-grass grass below 9 leaves in the Gramineae lawn, barnyard grass grass, speedwell, india lovegrass, moleplant seeds, and to the lawn high safety.Technical scheme of the present invention is that a kind of grass lawn herbicide is characterized in that each component and percentage by weight thereof are: α-two fluorine-based tears propionic acid 1-50%, and fenchlorazole 1-20%, synergist 5-10%, all the other are auxiliary agent.A kind of preparation method of grass lawn herbicide: (1), fluorine compounds synthetic: fenoxapropPethyl and active two fluorine-based aromatics are fed intake according to mol ratio at 2: 1, with the 4-dimethylamino naphthyridine as catalyzer, dissolving back pressure build up stirs simultaneously under 65 ℃ and normal pressure.Be stabilized in 320-330 ℃ and 8-9 following the stirring 2.5 hours of atmospheric pressure, cooling back centrifugal dehydration naturally promptly gets fluorine compounds; (2), difluoro compound is synthetic: fluorine compounds and active two fluorine-based aromatics are fed intake according to mol ratio at 3.5: 1, the same 4-dimethylamino naphthyridine of using is as catalyzer, be warming up to 570-585 ℃, stirring reaction under 19-20 atmospheric pressure, begin cooling after about 5 hours, obtain α-two fluorine-based tears propionic acid, β-two fluorine-based tears propionic acid, γ-three isomers of two fluorine-based tears propionic acid of difluoro compound, obtain crystal after the centrifugal dehydration; (3), three kinds of isomeric compounds are dissolved in acetylacetone,2,4-pentanedione, add FwF3 and NaNo2, stirred after 30-40 minute static 3 hours, the upper strata colourless liquid is got in separation, promptly obtains α-two fluorine-based tears propionic acid solution, then acetone separation is obtained crystal; (4), α-two fluorine-based tears propionic acid, fenchlorazole, Brominal and auxiliary agent are mixed make grass lawn herbicide missible oil.The present invention has been owing to adopted the compound herbicide of α-two fluorine-based tears propionic acid, fenchlorazole and synergist, thereby has compared with the prior art and prevent and kill off the above the average age for marriage malignant weed effect of grass family up to more than 90% and to the remarkable advantage of lawn high safety.
Embodiment:
The preparation method of weed killer herbicide of the present invention has following steps:
(1), fluorine compounds is synthetic
FenoxapropPethyl and active two fluorine-based aromatics are fed intake according to mol ratio at 2: 1, and as catalyzer, dissolving back pressure build up under 65 ℃ and normal pressure stirs simultaneously with the 4-dimethylamino naphthyridine.Be stabilized under 320-330 ℃ and 8-9 the atmospheric pressure and stirred 2.5 hours, cooling centrifugal dehydration afterwards naturally obtains fluorine compounds;
(2), difluoro compound is synthetic
One fluorine compounds and active two fluorine-based aromatics are fed intake according to mol ratio at 3.5: 1, the same 4-dimethylamino naphthyridine of using is as catalyzer, be warming up to 570-585 ℃, stirring reaction under 19-20 atmospheric pressure, begin cooling after about 5 hours, obtain three isomers of difluoro compound, promptly α-two fluorine-based tears propionic acid, β-two fluorine-based tears propionic acid, γ-two fluorine-based tears propionic acid obtain crystal after the centrifugal dehydration;
(3), three kinds of isomeric compounds are dissolved in acetylacetone,2,4-pentanedione, adding FeF
3And NaNO
3Stirred after 30-40 minute static 3 hours, the upper strata colourless liquid is got in separation, and (β, gamma isomer react respectively to generate has the solution of color compound and liquid level to move down, form sharp interface), promptly obtain α-two fluorine-based tears propionic acid solution, then acetone separation is obtained α-two fluorine-based tears propionic acid crystal;
(4), α-two fluorine-based tears propionic acid+fenchlorazoles+Brominal+dimethylbenzene, emulsifier, dispersant, adhesive agent, bleeding agent promptly obtain grass lawn herbicide missible oil.
The using method of weed killer herbicide of the present invention is, to the Cheng Ping lawn, when weeds were the 5-9 leaf, the cauline leaf spraying was carried out to the lawn after with 90 milliliters of weed killer herbicides and 30 kg of water mixings in every mu of lawn, and 3-5 days take effect after the dispenser, and weeds began death in 10-15 days.Weed killer herbicide of the present invention is obtained good herbicidal effect through the test of field, lawn, sees table 2 for details, table 3.
The formula combination of different single agent of weed killer herbicide of the present invention sees Table 1
The formula combination table of different single agent of table 1 weed killer herbicide of the present invention
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | |
| α-two fluorine-based tears propionic acid % | 50 | 1.5 | 35 | 30 | 25 |
| Fenchlorazole % | 50 | 20 | 7 | 12 | 17 |
| Synergist % | 4.5 | 6.5 | 8 | 7 | 5 |
| Auxiliary agent % | 43.5 | 72 | 50 | 51 | 53 |
Table 2 is prevented and kill off the Gramineae lawn owner of farmland and is wanted the grassy weed test
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Table 3 is prevented and kill off the Gramineae lawn owner of farmland and is wanted the grassy weed effect test
| Prescription | Spraying time | The dispenser place | The lawn kind | Handle (g/h m 2) | The investigation effective drug duration | The weeds leaf age | Strain preventive effect (%) | Fresh weight preventive effect (%) |
| Prescription one | 2001.7.15 | Ha Erbin | Annual bluegrass | 900～1200 | 20 days | 6——9 | 96.2 | 98.3 |
| Prescription three | 2001.5.12 | Ha Erbin | Annual bluegrass | 1200～1800 | 20 days | 5——9 | 97.7 | 99.1 |
| Prescription four | 2001.5.20 | Xinxiang | Festuca Arundinacea | 1200～1800 | 20 days | 4——9 | 97.4 | 98.6 |
| Prescription one | 2002.8.2 | Xinxiang | Festuca Arundinacea | 1200～1800 | 20 days | 6——9 | 94.8 | 95.5 |
| Prescription five | 2002.6.10 | Wuhan | Bent grass | 900～1200 | 15 days | 5——9 | 95.6 | 97.3 |
| Prescription two | 2002.4.6 | Shanghai | Perennial ryegrass | 1200～1800 | 25 days | 4——9 | 98.1 | 99.0 |
| Remarks: the weeds kind mainly contains: lady's-grass, mao matang, eleusine indica, green foxtail, ditch millet, Paspalum distichum, india lovegrass, wheatgrass, cogongrass, golden dog tail, speedwell etc. | ||||||||
Claims (2)
1, a kind of grass lawn herbicide is characterized in that each component and percentage by weight thereof are: α-two fluorine-based tears propionic acid 1-50%, and fenchlorazole 1-20%, synergist 5-10%, all the other are auxiliary agent.
2, a kind of grass lawn herbicide and preparation method thereof is characterized in that:
(1), fluorine compounds is synthetic
FenoxapropPethyl and active two fluorine-based aromatics are fed intake according to mol ratio at 2: 1, and as catalyzer, dissolving back pressure build up under 65 ℃ and normal pressure stirs simultaneously with the 4-dimethylamino naphthyridine.Be stabilized in 320-330 ℃ and 8-9 following the stirring 2.5 hours of atmospheric pressure, cooling back centrifugal dehydration naturally promptly gets fluorine compounds;
(2), difluoro compound is synthetic
One fluorine compounds and active two fluorine-based aromatics are fed intake according to mol ratio at 3.5: 1, the same 4-dimethylamino naphthyridine of using is as catalyzer, be warming up to 570-585 ℃, stirring reaction under 19-20 atmospheric pressure, begin cooling after about 5 hours, obtain α-two fluorine-based tears propionic acid, β-two fluorine-based tears propionic acid, γ-three isomers of two fluorine-based tears propionic acid of difluoro compound, obtain crystal after the centrifugal dehydration;
(3), three kinds of isomeric compounds are dissolved in acetylacetone,2,4-pentanedione, adding FwF
3And NaNo
2, stirred after 30-40 minute static 3 hours, separate and get the upper strata colourless liquid, promptly obtain α-two fluorine-based tears propionic acid solution, then acetone separation is obtained crystal;
(4), α-two fluorine-based tears propionic acid, fenchlorazole, Brominal and auxiliary agent are mixed make grass lawn herbicide missible oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101070524A CN1934946A (en) | 2006-09-15 | 2006-09-15 | Grass lawn herbicide and its preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101070524A CN1934946A (en) | 2006-09-15 | 2006-09-15 | Grass lawn herbicide and its preparing method |
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| Publication Number | Publication Date |
|---|---|
| CN1934946A true CN1934946A (en) | 2007-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101070524A Pending CN1934946A (en) | 2006-09-15 | 2006-09-15 | Grass lawn herbicide and its preparing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110833071A (en) * | 2018-08-17 | 2020-02-25 | 新乡市莱恩坪安园林有限公司 | Herbicide for preventing and controlling weeds in cold-season lawns |
-
2006
- 2006-09-15 CN CNA2006101070524A patent/CN1934946A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110833071A (en) * | 2018-08-17 | 2020-02-25 | 新乡市莱恩坪安园林有限公司 | Herbicide for preventing and controlling weeds in cold-season lawns |
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