CN1053877A - The metolachlor of miniature capsule envelope - Google Patents
The metolachlor of miniature capsule envelope Download PDFInfo
- Publication number
- CN1053877A CN1053877A CN91101033A CN91101033A CN1053877A CN 1053877 A CN1053877 A CN 1053877A CN 91101033 A CN91101033 A CN 91101033A CN 91101033 A CN91101033 A CN 91101033A CN 1053877 A CN1053877 A CN 1053877A
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- CN
- China
- Prior art keywords
- metolachlor
- capsule
- corn
- antipoison
- emulsifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/26—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests in coated particulate form
- A01N25/28—Microcapsules or nanocapsules
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- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Agronomy & Crop Science (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The metolachlor that does not contain antipoison of capsule envelope is used for the corn field management of weeds, does not make monoacetylaniline weed killer herbicide injury reach underproof degree simultaneously corn.
Description
The present invention relates to use broad leaved weed and the annual grass of weed killer herbicide to prevent and kill off crop Tanaka.More specifically say, relate to use monoacetylaniline class weed killer herbicide to prevent and kill off broad leaved weed and annual grass in the corn field.
At many known commercially available herbicidal compositions that corn field is prevented and kill off broad leaved weed and annual grass that are used for, comprise and contain the pharmaceutical formulation of some monoacetylaniline as active component.Monoacetylaniline weed killer herbicide with remarkable agriculture effect comprises weeds locks (alachlor), i.e. 2-chloro-N-(2,6-diethyl phenyl)-the N-(methoxyl methyl) acetamide; Also have metolachlor (metolachlor), i.e. 2-chloro-N-(2-ethyl-6-aminomethyl phenyl)-N-(2-methoxyl group-1-first and second bases) acetamide.Prevent and kill off broad leaved weed and annual careless effect before these two kinds of excellent buds of monoacetylaniline tool, and the corn of plantation is not had obvious injury.
Another kind is metolachlor (acetochlor), i.e. 2-chloro-N-(ethoxyl methyl)-N-(2-ethyl-6-aminomethyl phenyl) acetamide.Though metolachlor can be prevented and kill off the weeds and the annual grass of wide spectrum well, disadvantageously, it reaches nonconforming degree to the phytotoxicity of corn.Prevent and kill off the weeds of wide spectrum in the corn field and the advantage of annual grass in order to bring into play metolachlor, do not make crop be subjected to obvious injury again simultaneously, known a kind of way is to add a kind of safener or antipoison in containing the herbicidal composition of metolachlor.Some acetamide He oxazolidine known be the most effective antipoison or the safener that alleviates metolachlor injury corn.People also study more effective antipoison or safener and metolachlor in continuation and share to prevent and kill off broad leaved weed and annual grass, make the malformation XOR dwarfing effect of corn reduce to minimum simultaneously.
The way that has proposed is with monoacetylaniline weed killer herbicide capsule envelope, so that the bigger flexibility of this weed killer herbicide packing and shipment to be provided.Yet, in the time will and in the greenhouse, estimating, finding that this micro-capsule with antipoison seals metolachlor and compares with the metolachlor with antipoison of making missible oil with the miniature capsule envelope of the metolachlor of antipoison, the former is more safer for corn.Yet, use no antipoison micro-capsule envelope metolachlor when greenhouse test, the injury of corn is still reached underproof degree.Owing to this reason, people never use the no antipoison metolachlor of micro-capsule envelope to go the purpose that reaches such, promptly with this method as Tanaka greatly to the security measure of known metolachlor to the corn injury effect.The unexpected discovery;, in fact need in this micro-capsule envelope herbicidal composition, not contain safener or antipoison and with the corn that adequately protects serious distortion not take place or downgrade in case when removing the weeds of corn field and annual grass when the metolachlor of micro-capsule envelope is used for big Tanaka as preemergence herbicide.Have found that, when the containing the metolachlor weed killer herbicide and use of no antipoison, for minimal tilling or the no-tillage system maize planting is effective especially with the micro-capsule form.Under this kind state of cultivation, the ability that the no antipoison metolachlor of this micro-capsule envelope is prevented and kill off broad-spectrum weeding and annual grass reaches and can compare with other commercially available monoacetylaniline weed killer herbicides, reaches defective degree to the injury of corn is unlikely simultaneously.
Prior art is not predicted or is obviously pointed out, it is unlikely to corn generation grievous injury in preventing and kill off broad leaved weed and annual grass to use the no antipoison metolachlor of micro-capsule envelope.
The present invention provides a kind of crop protection method, and wherein the no antipoison metolachlor of micro-capsule envelope is used to prevent and kill off broad leaved weed and the annual grass in the corn field as preemergence herbicide in big Tanaka.Reach metolachlor Tanaka and prevent and kill off the ability of wide spectrum broad leaved weed and annual grass and can compare, the unlikely injury that corn is produced defective degree simultaneously with the ability of other known monoacetylaniline weed killer herbicides.Use Tanaka under the situation of the no antipoison metolachlor of micro-capsule envelope, the preferred employing minimal tilled or the no-tillage system farming technique.The no antipoison metolachlor of this micro-capsule envelope is used the effective dose of weeding Tanaka, and the hole that metolachlor passes the capsule closure material spreads at a slow speed.Generally, the formulation rate of metolachlor is the about 1.0-5.0 kilogram of per hectare, preferably 1.5-4.0 kg/ha.
Have found that, when metolachlor is when the composition forms of suspension is used in water with the micro-capsule that contains metolachlor with ormal weight, can prevent the general injury that is caused during with independent metolachlor or with other herbicide mixtures effectively.Specifically, have found that, do not need to add safener or antipoison in the metolachlor in micro-capsule and improve the receptivity of corn metolachlor.And do not need in soil or corn seed surface applied safener or antipoison protect corn to make it not to be subjected to metolachlor to injure yet.
The capsule envelope and the compound method that are suitable for are indicated in US4280833.This method provides a kind of herbicidal composition, wherein comprises the micro-capsule that contains weed killer herbicide and suspends in water.The concentration of weed killer herbicide in this composition is suspension in about 480 to 700 grams per liter water.This method is the aqueous solution that preparation earlier contains a kind of emulsifier.This weed killer herbicide and first kind of polymer formation component are added down in this solution in stirring, form the dispersion liquid of weed killer herbicide droplet and first kind of polymer formation component.Under continuing stirring state second kind of polymer being formed component then joins in the dispersion liquid.These two kinds of polymer form component generation polycondensation, form softgel shell outside weed killer herbicide.
The method and the prescription that are used for capsule envelope metolachlor are all very important.This seed capsules encapsulation technique relates at the interface of metolachlor in water droplet makes a kind of polymer form material generation polymerization.Behind the polymerization reaction take place, form around the polymer shell wall that contains the metolachlor core.Optimal way, this polymer form material and comprise a kind of polyisocyanates and a kind of diamines, and they can form polymer.It mainly is by diffusing through the hole of capsule earth materials that metolachlor discharges at a slow speed in soil from capsule, rather than breaks this polymer shell wall.
In the method that the metolachlor capsule is enclosed within the suitable polyurea shell wall, provide the metolachlor that contains suitable emulsifier emulsion in water.Preferred solvent is a kind of lignosulphonates.In stirring, this contains the additive of metolachlor preparaton together with water-immiscible promotion with metolachlor, and many phenyl isocyanic acid polymethylene polyisocyanate joins this and contain aqueous phase, to form this water immiscible phase is dispersed into droplet at aqueous phase state.Add a kind of polyfunctional group amine then in this organic matter/aqueous dispersions, be preferably 1, the 6-hexamethylene diamine does not stop to stir.This polyfunctional amine and the reaction of many phenyl isocyanic acid polymethylene polyisocyanate form polyurea shell wall outside metolachlor.
The polyisocyanates that is suitable for includes but not limited to: toluene-2,4-diisocyanate, two isocyanic acids 1, the own ester of 6-, diphenyl isocyanic acid methylene ester, many phenyl isocyanic acid polymethylene polyisocyanate.Most preferably and what commercially available product was arranged is many phenyl isocyanic acid polymethylene polyisocyanate, many phenyl isocyanic acid polymethylene polyisocyanate of the merchant's name PAPI that sells as Dow.
Be applicable to that polyfunctional amine of the present invention is those kinds that can react and form polyurea shell wall with many phenyl isocyanic acid polymethylene polyisocyanate.It is own water-soluble that this polyfunctional amine should be, or the form of water soluble salt.Available polyfunctional amine has multiple, can include but not limited to: ethylenediamine, propane diamine, different propane diamine, 1,6-hexamethylene diamine, toluenediamine, trien, tetren, penten, diethylenetriamines, bis hexamethylene triamine or the like.These amine can use separately or with 1,6-hexamethylene diamine (HMD) share.With 1, it is preferred that the 6-hexamethylene diamine is used for the present invention.
Form the shell wall of capsule envelope metolachlor by many phenyl isocyanic acid polymethylene polyisocyanate and polyfunctional amine generation polycondensation.The shell wall content that is formed the envelope capsule by this method can be in about 5-30%(weight by metolachlor) scope, be preferably 8-20%.
The consumption of many phenyl isocyanic acid polymethylene polyisocyanate and polyfunctional amine depends on the shell wall content that is generated in this method.Though the consumption ratio of this two reactant serves as preferred to press stoichiometric ratio, also should understand that wherein any uses the excessive the spirit and scope of the present invention that also do not deviate from.
Need among the present invention with emulsifier be preferably lignosulphonates, for example, sodium, potassium, magnesium, calcium or ammonium salt.When implementing the inventive method, the lignosulphonic acid sodium salt is a preferred solvent.Any commercially available this type emulsifier all is suitable for, at Mc Cutcheon, and Detergents and Emulsifiers, North American Edition 1978(Mc Cutcheon Div., MC Publishing Co., Glen Rock, N.J.) middle description has multiple.The commercial emulsifier that can propose has: Treax
, LTS, LTK, LTM are respectively lignin sulfonic acid potassium, magnesium, sodium salt (50% aqueous solution), Scott Paper Co., Forest Chemical Products; Marasperse CR
With Marasperse CBOS-3
, sodium lignosulfonate, Can Co.; Polyfon O
, Polyfon T
, Rear 88B
, lignosulphonic acid sodium salt, Reax C-21
, lignosulphonic acid calcium salt, Westvaco Polychemicals.
Optimum emulsifier concentration scope is counted about 0.5-15.% by metolachlor weight in this system, is preferably about 2-6%.The preferable amount of sodium lignosulfonate is a 2%(weight, with respect to metolachlor).Also can adopt higher emulsifier concentration.
Following embodiment only supplies to illustrate the present invention, and is not limiting the scope of the invention completely.Those skilled in the art make multiple equivalents according to this specification with may be obvious that.
Except that other had the person of indicating, umber was weight basis in the example.
Example 1
The metolachlor for preparing no antipoison micro-capsule envelope.Following preparaton is provided:
Composition weight %
Metolachlor (93.5% active component) 45.7
Water 39.8
Reax 88B 1.0
PAPI2027 3.2
1,6-hexamethylene diamine 1.4
NaCl 2.9
CaCl
25.9
Kelzan
Xanthan 0.1
To remain in the mixed liquor of the mixture impouring water of 50 ℃ technical grade metolachlor and many phenyl of PAPI isocyanic acid polymethylene polyisocyanate and Reax lignin sulfonate emulsifier.Using high-shear mixer makes this mixture become emulsion.In this emulsion, add 1, the 6-hexamethylene diamine, the stirring of slowing down simultaneously forms the envelope capsule.Form after the envelope capsule, add NaCl, CaCl
2With
Xanthan.Every liter contains 480 gram metolachlor active components in formulation thus obtained.Become about 10 microns of the average diameter of micro-capsule.
Example 2
With the following ingredients vigorous stirring, preparation contains the missible oil of metolachlor:
Composition weight %
Metolachlor (96.0% active component) 89.3
Witco emulsifier 10.6
Polysiloxanes antifoamer＜0.1
Crystal violet dyestuff 0.1
Example 3
With the following ingredients vigorous stirring, preparation contains the missible oil of metolachlor and antipoison:
Composition weight %
Metolachlor (95.2% active component) 64.1
Metolachlor (93.5% active component) 15.0
Oxazolidine antipoison * (95.0% active component) 7.9
Witco emulsifier 7.5
Calcium dodecyl benzene sulfonate 0.5
Ethylene glycol 1.0
C
9Arsol 3.9
Polysiloxanes antifoamer＜0.1
Crystal violet dyestuff 0.02
* 4-(two chloracetyls)-1-oxa--4-azaspiro (4.5) decane
Example 4
The metolachlor of no antipoison micro-capsule envelope is used for management of weeds, and with weed killer herbicide the alleviating in field experiment of comparing with or without the missible oil that metolachlor was made into of antipoison to the corn injury.
Compared of the injury of following various situations to corn:
(1) missible oil that is become Yu Gai oxazolidine by metolachlor by example 3;
(2) missible oil that is become the time by metolachlor by example 2 not with antipoison;
(3) seal thing by example 1 by the micro-capsule of suspended emulsion in water that metolachlor is become not with antipoison the time.
Field experiment to these examples adopts whole district's group at random to design (3-6 repetition) or Latin square method (8 repetitions).Handle in big Tanaka's dispenser that routine was ploughed, use dilatory airborne or portamist, support from 0.51 meter height of soil surface,, and demarcate to 280 liters of per hectare sprays with 2 kilograms/cm2 pressure spray medicine with 3.05 meters spray lance.The crop belts area is 3.05 a meters * 7.6-12 rice.Employing is sowed in due form to the hybrid corn seed of monoacetylaniline herbicide sensitive, reaches selected planting density by every kind of soil types.Test in several states of producing corn of the U.S., test is carried out at the corn normal growth season.
Handle back observation in 20-30 days growing area in medication and prevent and kill off broad leaved weed and annual careless situation, and metolachlor is to the injury situation of corn.
In each test, test the effect of the metolachlor of executing objectively.The plant associations that comprise corn crop reduce percentage, and the growth of corn crop reduces percentage, and monoacetylaniline is to the injury percentage of corn crop.List these percentage in the table below.
When the mensuration plant associations reduce percentage (%SR), the corn plants number of check plot is counted.Also the district that uses metolachlor is carried out same counting.%SR is the corn plants number that deducts processed district from the corn plants number of check plot, again divided by previous corn plants number, multiply by 100 then promptly.
When the mensuration growth reduces percentage (%GR), tried to distinguish the actual height of the plant of selecting at random with the chi measurement.Described height is vertical vertical distance of extending the highest leaf from soil to this strain corn.%GR is the plant average height that deducts processed district from the plant average height of check plot, again divided by previous height, multiply by 100 and get again.
When measuring monoacetylaniline weed killer herbicide injury percentage (%AI), count estimating the abnormal plant of growth in the corn in each district.Distortion plant percentage (%TP) is that undesired corn plants number deducts undesired milpa number in the processed district in the check plot of spraying herbicide never, again divided by previous strain number, multiply by 100 and get again.%AI is %SR and %TP sum of the two.
Table
Inorganic agent consumption kilogram active matter/hectare %SR %GR %AI
Metolachlor missible oil 4.5 13.0(16) 23.2(7 15.7(16))
3.4 8.3（14） 6.1（14） 11.1（9）
Metolachlor micro-capsule 4.5 6.0(16) 12.7(7 7.7(16))
3.4 6.2（14） 2.5（14） 5.7（9）
Metolachlor and antipoison 4.5 7.5(16) 8.3(16) 11.8(7)
Missible oil 3.4 5.1(14) 5.3(9 3.5(14))
The number of ()-side by side contrast
From above-listed data as can be known, when metolachlor with micro-capsule envelope form when use in the land for growing field crops, it is to the safe coefficient of corn, the safe effect of the antipoison when adding known monoacetylaniline to corn in metolachlor is the same.In addition, also can see, in metolachlor, not when being applied to the land for growing field crops under the antipoison situation, adopt micro-capsule envelope form much more safer than the form that adopts missible oil.
Also can find, take to minimal till or during the land for growing field crops of no-tillage system farming, injure and obtain better result for alleviating corn when no antipoison micro-capsule envelope metolachlor is applied to.
When the dispenser of land for growing field crops, the no antipoison metolachlor of micro-capsule envelope can be administered to the floristic region under the situation of not having other auxiliary agents except that water quality carrier and surfactant.Usually, the no antipoison metolachlor of micro-capsule envelope is used with one or more additional adjuvants, and thinner, suspending agent, solvent, carrier, conditioner or the like are for example arranged, or the appropriate combination of these auxiliary agents.
Claims (12)
1, the method for management of weeds in a kind of farmland of the maize planting in farming, comprise that the micro-capsule of using herbicidally effective amount in these farmlands is enclosed in the metolachlor with antipoison in a kind of polymer, the hole that makes these metolachlors pass this capsule closure material diffuses out at a slow speed.
2, by the process of claim 1 wherein that described farmland takes to minimal till the technology farming.
3, by the method for claim 2, the no-tillage technology farming is taked in wherein said farmland.
4, by the process of claim 1 wherein that the amount of application of described metolachlor is the about 1.0-5.0 kilogram of per hectare.
5, by the method for claim 2, the amount of application of wherein said metolachlor is the about 1.0-5.0 kilogram of per hectare.
6, by the method for claim 3, the amount of application of wherein said metolachlor is the about 1.0-5.0 kilogram of per hectare.
7, by the process of claim 1 wherein that described capsule envelope polymer is a kind of polyureas.
8, by the method for claim 7, wherein said polyureas is by many phenyl isocyanic acid polymethylene polyisocyanate and 1, and the 6-hexamethylene diamine forms.
9, by the process of claim 1 wherein that described envelope capsule is to suspend in water.
10, by the method for claim 9, wherein have a kind of emulsifier to stablize this suspension.
11, by the method for claim 10, wherein said emulsifier is a kind of lignosulphonates.
12, by the method for claim 10, wherein said emulsifier is the lignosulphonic acid sodium salt.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US47887490A | 1990-02-12 | 1990-02-12 | |
| US478,874 | 1990-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1053877A true CN1053877A (en) | 1991-08-21 |
Family
ID=23901722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91101033A Pending CN1053877A (en) | 1990-02-12 | 1991-02-11 | The metolachlor of miniature capsule envelope |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR930002952B1 (en) |
| CN (1) | CN1053877A (en) |
| BR (1) | BR9100581A (en) |
| ZA (1) | ZA911009B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109874790A (en) * | 2019-03-08 | 2019-06-14 | 南通江山农药化工股份有限公司 | Herbicidal composition suspending agent of the micro-capsule containing suspension and preparation method thereof |
-
1991
- 1991-02-08 BR BR919100581A patent/BR9100581A/en not_active IP Right Cessation
- 1991-02-11 ZA ZA911009A patent/ZA911009B/en unknown
- 1991-02-11 CN CN91101033A patent/CN1053877A/en active Pending
- 1991-02-11 KR KR1019910002265A patent/KR930002952B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109874790A (en) * | 2019-03-08 | 2019-06-14 | 南通江山农药化工股份有限公司 | Herbicidal composition suspending agent of the micro-capsule containing suspension and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| BR9100581A (en) | 1991-10-29 |
| ZA911009B (en) | 1992-02-26 |
| KR930002952B1 (en) | 1993-04-16 |
| KR910015227A (en) | 1991-09-30 |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |