CN1025142C - Herbicidal compositions based on a glyphosate type herbicide and a phenoxybenzoic type herbicide and method for the treatment of undesirable plants using these compositions - Google Patents

Abstract

Herbicidal composition comprising at least one herbicide of the glyphosate type and at leat one herbicide of the phenoxybenzoic type, preferably acifluorfen sodium, the weight ratio between the phenoxybenzoic herbicide and the glyphosate herbicide being comprised between 1/12 and 1/80, preferably between 1/15 and 1/50. This composition is particularly resistant to washing due to precipitations which occur just after application.

Description

Herbicidal compositions based on a glyphosate type herbicide and a phenoxybenzoic type herbicide and method for the treatment of undesirable plants using these compositions

The present invention relates to a kind of weed killer herbicide of glyphosate type and a kind of weed killer herbicide of phenoxy benzoic acid type is the novel weed killer herbicide composition of base.The present invention also relates to use these to form the method for management of weeds.Glyphosate (or N-phosphono-methyl-glycine) and its esters are well-known to preventing and kill off the weed killer herbicide that annual and perennial weed has extensive field of activity.This class weed killer herbicide is famous with usefulness behind its bud especially, and is used in gardening and agriculture dispenser.Yet people wish further to improve the activity of weeding of these compounds still.

Known herbicides of glyphosate type role is slower.In fact usually need about three time-of-weeks could check its effectiveness.

In order to remedy this defective, world organization-the annotation of translation of PCT WO(Patent Cooperation Treaty) 84/03607 patent application is pointed out, in gardening enthusiasts' dispenser in particular cases, add the speed of action that one of the acifluofene of some or its esters can improve herbicides of glyphosate type to herbicides of glyphosate type.In this scope, be to use the herbicides of glyphosate type of an effective dose, and added acifluofene so that weight ratio is actually is included between 1/8.33 and 1/4.2.Yet, having proved already that described composition can demonstrate a kind of tangible antagonism under many occasions, its result is harmful to the usefulness of herbicides of glyphosate type.Therefore, people once advised using the instant preparating mixture of glyphosate and acifluofene to come management of weeds (be not in the garden weeds but big face kind crop ped location for example soybeans weeds).As southern weeds science association the 38th nd Annual Meeting collection (Sang Pei and partner thereof, 1985 86～89 pages) point out, a kind of dosage that the glyphosate of 430 gram/hectares is equipped with 70 gram/hectare acifluofene demonstrates has a kind of obvious antagonism to preventing and kill off of check weeds, in addition, this antagonism reduces along with the ratio of glyphosate/acifluofene and dwindles, also promptly when increasing acifluofene amount/time, this antagonism along with reduction.

Ibidem second edition, the 64th～67 page (Fu Luosite and partner thereof) confirmed the dosage fact of necessary increase acifluofene equally.

By the theory of this back one publication, people prove that also the glyphosate activity scope reduces to some extent, especially for preventing and kill off grassy weed.

With another defective relevant with the mode of action of glyphosate or derivatives thereof is to be that they are easy to be rinsed.That is to say that if there was a pouring rain suddenly a few hours after the dispenser, most of active ingredient will be flushed away.Equally, improve herbicides of glyphosate type to because poky plant or be desirable under low temperature and/or the low humidity condition for the effect of the plant that is in latter stage in plant growing cycle.

Unexpected, the present invention can remedy above these defectives, especially can reach one of following target or several:

Improve the speed of action of herbicides of glyphosate type;

Improve the field of activity of herbicides of glyphosate type;

Improve the weeding characteristic of herbicides of glyphosate type;

Avoid the leaching of herbicides of glyphosate type;

Improve herbicides of glyphosate type to because poky plant or for the effect of the plant that is in latter stage in plant growing cycle under low temperature and/or the low humidity condition.

According to the present invention, weed killer herbicide is formed and is comprised at least a glyphosate (I) type weed killer herbicide and at least a phenoxy benzoic acid (VIII) type weed killer herbicide, and it is characterized in that: the weight ratio of (VIII)/(I) is to be included between 1/12 and 1/80, is preferably between 1/15 and 1/50.

This be equivalent to (VIII)/(I) mol ratio (considered for (I) and for (VIII) all change into acid molar equivalent) be included in 1.2/12 and 1.2/80 between and be included in preferably between 1.2/15 and 1.2/50.

Detailed description of the present invention

Herbicides of glyphosate type

Spendable in the present invention herbicides of glyphosate type mainly is compound and their metabolite and the derivative that meets following chemical formula I and I a.Following chemical formula I and I a give a definition for described compound.

（Ⅰ）

In the formula

Z is cyano group or COOR;

R is a hydrogen atom or selects from low alkyl group, low-grade alkenyl or low-grade alkoxy alkyl group; Aryl contains 6～10 carbon atoms and non-imposed has 1～3 substituting group, and substituting group can at random be selected from the group of low alkyl group, lower alkoxy, halogeno-group, trifluoromethyl, nitro and cyano group; Or cation compatible, that can form a kind of salt;

R ¹And R ²Be identical or inequality, be hydrogen atom or in low alkyl group, aryl, substituted aryl, xenyl group, select; Or a plurality of cations compatible, that can form salt.

（Ⅰa）

In the formula

Z ²It is compatible, as to form an a kind of salt anion;

R ³And R ⁴Be identical or inequality, and represent a plurality of hydrogen atoms or low alkyl group or aryl (can be substituted), or xenyl;

Z ¹Be cyano group or COOR ⁵;

R ⁵Can have the same definition that provides as R, unless what relate to is a cation.

Chemical formula (I) and (I a) in, the compound of being estimated is those compounds, i.e. wherein Z and Z ¹COOR and COOR respectively do for oneself ⁵Group.As for chemical formula (I), the compound of being estimated is those compounds, i.e. wherein R, R ¹And R ²(identical or inequality) is hydrogen atom or compatible cation.The organic salt of ammonium accords with chemical formula (I), especially those wherein R provide good result for by the isopropylamine cationic salt of deriving, and commercial disposable.The organic salt of sulfonium or sulfoxide (those R wherein for example ¹And/or R ²Be trimethylsulfonium or the cationic salt of front three sulfoxide) also be suitable for.Accord with the isopropyl amine salt of chemical formula (I) or (example of I compound a) is the N-(phosphono-methyl) glycine, it is the active component in the weed killer herbicide, (Roundup) is gone on the market with trade name " Roundup " by Monsanto Company.

(I a), the compound of being estimated is those wherein R as for chemical formula ³And R ⁴Z in (identical or inequality) representative low alkyl group or aryl and the base ¹Be a COOR ⁵Group, R ⁵Be a low alkyl group or aryl.

From the cation of weed killer herbicide viewpoint with anion is as chemical formula (I) or (cation or the anion of the part of I a kind of salt a), they can not make the weed killer herbicide characteristic of compound degenerate.The form of salt normally the most easily is dissolved in the water, and more more favourable than corresponding free acid or free alkali.

Compatible cationic example comprises: alkali metal cation (as sodium or potassium), alkaline earth metal cation (as calcium or magnesium); The cation of copper, zinc, iron, nickel, manganese, ammonium or organic ammonium, Phosphonium, sulfonium or sulfoxide, these cations are to have to be lower than 300 molecular weight preferably.The organic cation of suitable ammonium comprises: the derivative of amine especially has aliphatic amine, cyclammonium or the heterocyclic amine of 1 or 2 amido, for example the derivative of alkylamine, alkylene amines, chain enamine and aliphatic alcohol amine.The example of amine derivant comprises (but being not limited to these): methylamine, ethamine, n-propylamine, isopropylamine, n-butylamine, isobutyl amine, sec-butylamine, n-amylamine, iso-amylamine, hexylamine, heptyl amice, octylame, nonyl amine, decyl amine, undecylamine, lauryl amine, tridecyl amine, tetradecy lamine, pentadecyl amine, cetylamine, heptadecyl-amine, octadecylamine, methyl ethyl-amine, methyl isopropyl amine, tuaminoheptane, the methyl nonyl amine, the methyl pentadecyl amine, the methyl octadecylamine, ethyl butyl amine, the ethyl heptyl amice, the ethyl octylame, the hexyl heptyl amice, the hexyl octylame, dimethylamine, diethylamine, di-n-propylamine, diisopropylamine, two n-amylamines, di-iso-amylamine, dihexylamine, two heptyl amices, dioctylamine, trimethylamine, triethylamine, Tri-n-Propylamine, tri-isopropyl amine, tri-n-butylamine, triisobutylamine, tri sec-butylamine, tri-n-amyl amine, normal propyl alcohol amine, isopropanolamine, diethanol amine, N, N '-diethyl ethylene diamine, the N-ethylpropanolamine, the N-butylethanolamine, allylamine, just-cyclobutenyl-2-amine, just-pentenyl-2-amine, 2,3-dimethyl butyrate thiazolinyl-2-amine, dibutene base-2-amine, just-hexenyl-2-amine and propane diamine Propylenedianjixe propane diamine; Uncle's arylamine class (as aniline, aminoanisole, phenetidine, ortho-aminotoluene, meta-aminotoluene and para-totuidine, phenylenediamine, 2,4,6-tribromaniline, benzidine, naphthylamines, o-chloraniline, m-chloroaniline, parachloroanilinum etc.); Heterocyclic amine (as pyridine, morpholine, piperidines, pyrrolidines, 2,3-dihydro indoles (Indoline), azepines etc.).

In the middle of the organic cation of sulfonium that is fit to and sulfoxide, C is arranged ₁～C ₁₀(be C preferably ₁～C ₅Low alkyl group) cation of alkyl-sulfonium and C ₁～C ₁₀The cation of (being low alkyl group preferably) alkyl-sulfoxide is as front three sulfonium, ethyl diformazan sulfonium, 3 third sulfoniums, front three sulfoxide, three second sulfoxides etc.These salts are described in U.S. Patent No. 4 315 765 especially to some extent.Shi He De phosphonium cation comprise (but being not limited to these) those by chemical formula:

The De phosphonium cation of representing.

In the formula, R ^a, R ^bAnd R ^c(identical or inequality) representative C ₁～C ₁₀Phenyl or alkyl (being low alkyl group preferably).These salts are all described in U.S. Patent No. 4 341 549 to some extent.Cationic other examples that are fit to are then described in U.S. Patent No. 3 799 758 to some extent.The compatible anion that is fit to comprises (but being not limited to these): anion such as chlorine, bromine, fluorine, sulphate, sulphite, bisulfites, phosphate, orthophosphates, carbonate, bicarbonate, acetate, butyrate, benzoate, maleate.

Chemical formula (I) and (I compound a) is in for example U.S. Patent No. 3 799 758,3 835 000,3 950 402,4 067 719,4 008 296, narration to some extent in 4 147 719 and 4 369 142, these patents propose in this application as a reference.

Many by the green plants metabolism compound or also can be used to be equivalent to the chemical combination that glyphosate activity part (from the phytotoxicity viewpoint) works.These compounds comprise: for example, with chemical formula (I) and (I a) representative chemical combination and by the compound of following chemical formula representative:

In the formula

Z ², R ¹, R ², R ³And R ⁴Meet above-mentioned definition;

Z ⁴Be a CH ₂The CN base; CONHOH(or its tautomeric forms-C(OH)=NOH); CH ₂COOR, wherein R has foregoing implication; CONR ⁷R ⁸, R wherein ⁷And R ⁸(identical or inequality) has equally and is same as the definition that provides for R;

Z ³Be one-CH ₂-CN base;-CO-NHOH(or its tautomeric forms-C(OH)-NOH);-CH ₂;-COOR ⁵Or-CONR ⁵R ⁵, wherein various R ⁵Group (mutually the same or inequality) has one of aforementioned implication.R ⁵⁰The aryl carbonyl that is a low alkyl group, lower alkoxy, hydroxyl, lower alkanols alkyl, optionally replaces, trifluoroacetyl group, low-grade alkyl thio group, lower alkanols alkyl; Amino, alkyl amino, nitro, nitroso or one-COOR ⁹,-OCH group; COOR ¹⁰,-CH ₂P(O) OR ¹⁵(OR ²⁵) ,-S(O) m-R ¹¹,-SO-X-R ¹¹Or-CO-S(O) m-R ¹², R wherein ⁹The aryl that is a low alkyl group, low-grade alkenyl, optionally replaces, R ¹¹Be a low alkyl group or the random aryl that replaces; X representative-O-or-S-; R ¹²Be from low alkyl group, low-grade alkenyl, low-grade alkynyl, the random aryl that replaces; Arbitrarily select between the aralkyl (rudimentary) that replaces; M equals 0,1 or 2; R ¹⁵, R ²⁵And R ¹⁰Have as being above R ¹The same definition that is proposed, R ⁶Be a hydrogen atom or a low alkyl group, an aryl that optionally replaces; The lower aryl of Qu Daiing optionally; The rudimentary aralkyl of Qu Daiing optionally; A COOR ⁵Or-P(O) (OR ³) (OR ⁴) group, wherein R ³, R ⁴And R ⁵Accord with definition above.

The product that meets formula hereinabove (II)～(VII) generally is many all, and can prepare by known method or with the similar method of known method.These products and preparation method are in U.S. Patent No. 4 035 177,4 175 946,4 251 258,4 231 782,4 322 238,4 322 239,4 323 387, all describe to some extent in 4 300 942,4 300 943; At American Studies explanation application No.220 001(Derwent No.73821 E/35); BP No.2 090 596; Belgian patent No.888 001; Japan Patent No.56139408,57120595 and 57099597; European publishing thing No.39 310; Also all describe to some extent among the Deutsche Reichs Patent application No.2 361 382.Top patent of mentioning and patent application are all as a reference.

Benzoic acid (phenoxy group replaces) derivative

Between spendable in the present invention benzoic acid (phenoxy group replaces) derivative, have to comprise 2-nitro-benzoic acid derivative of 5-phenoxy group replacement and their derivative, accord with following chemical formula (VIII):

（Ⅷ）

In the formula

Z ⁶Represent a chlorine atom or CF ₃Gene;

Z ⁵Represent a chlorine atom or fluorine atom;

Z ⁷Represent a hydrogen atom, chlorine atom or fluorine atom;

Z ⁸Represent a chlorine atom or a nitro;

The value that P has is 0 or 1;

R ¹³And R ¹⁴(identical or inequality), representative (a plurality of) hydrogen atom or (a plurality of) methyl; Z ⁹Representing a hydroxyl or alkoxyl (especially lower alkoxy) or OM(M is the atom of alkali metal or alkali earth metal, (especially Na or K) or alkyl (rudimentary)-sulfonamides.

In these compounds, people preferably accord with the compound of chemical formula (VIII), wherein Z ⁶Be a CF ₃Group, Z ⁸Be a nitro, Z ⁵Be a CP group, Z ⁷Be a hydrogen atom, because these compounds more can specifically satisfy the target of enumerating of the present invention in preamble.

In these compounds, we are preferred:

Acifluofene, it is P=O and Z in the chemical formula ⁹Be the compound of an OH base, the perhaps sylvite of acifluofene or sodium salt (Z ⁹=OM, M=Na or K);

Fomesafene, it is P=O and Z in the chemical formula ⁹Be N-sulfonyloxy methyl amine (NH-SO ₂CH ₃) compound;

Benzofluofene, it is P=1 in the chemical formula, R ¹³, R ¹⁴=H and Z ⁹It is an OEt group.

In these compounds, acifluofene-sodium is preferentially selected for use.

According to the present invention, new agrochemistry is formed can contain known active substance and the common mixture that uses ingredient (as surfactant, carrier and thinner) in the practice.Contain two kinds of substitutes (systemic herbicide and phenoxy benzoic acid derivative) if form, or two or more substitute, the described composition that is hopeful to obtain is (being mixed with even and/or homogeneous phase mode) of suitably being mixed, and we can reach this mixing by a kind of special paddling process.Composition can carry out bucket to be mixed or premix, especially premix.

The invention still further relates to the method for a weeding, be the plant that must be destroyed is applied the effective dose that a kind of weed killer herbicide is formed.This processing method possesses destructive purpose, enables to control weed growth especially and or may eliminate weeds whole or in part.

Weed killer herbicide is formed or active material admixture (as described and utilizable according to the present invention hereinbefore) is the blade face that is applied to plant in the mode that is fit to, particularly for weeds to be eliminated, when the latter presents a slice greenery.

Weed killer herbicide is formed equally can not long ago carry out dispenser with the elimination weeds in results, and the root of these weeds is held after results in the soil that exists.So just may after results, the mechanically actuated (manual or other modes) without weeding soon promptly plant.Yet, when the weed killer herbicide of using be not persist and/or to results after crop to be planted be optionally under the occasion, the method should careful use.

Usually, the absorption compound is that dosage by 0.3～0.9 kilogram/hectare (being about 0.4～0.8 kilogram/hectare and especially about 0.5～0.7 kilogram/hectare preferably) is applied on the plant in the glyphosate type.

The compound of chemical formula (VIII) is used as the chemical substance of modified membrane; Favourable application dosage is included between about 0.005～0.1 kilogram/hectare, preferably between about 0.02～0.08 kilogram/hectare.

The weight ratio of phenoxy benzoic acid type weed killer herbicide/herbicides of glyphosate type is to be included between 1/12 and 1/80, is preferably between 1/15 and 1/50.

Use composition of the present invention, we observe the effectively anti-removing solid capacity for following weeds: broadleaf weed: the Xanthium(Siberian cocklebur), Ipomoea(leads a cow), the Sesbania(sesbania), Abutilon(

Fiber crops), the Polygonum(corn-bind, willow-grass), the Amaranthus(amaranth), the Chenopodium(lamb's-quarters), the Sinapis(sinapsis alba), the Datura(datura), the Solanum(black nightshade), the Euphorbia(root of Beijing euphorbia), the Bidens(bur beggar-ticks), Galinsoga(clearvers nutgrass flatsedge).Monocotyledon weed: (grass family) Setaria(green foxtail), the Echinochloa(barnyard grass)

According with method of the present invention makes the annual and perennial weed (monocotyledonous or dicots) of preventing and kill off broad range become possibility.Weeds can be eliminated by method of the present invention and composition, make the soil in shape so that can continue from now on to grow up such as crops such as cereal, wheat class, rice class, cotton, soybean, respectful dish (particularly sugar beet), sunflower, rape, sugarcane, vegetables, and the effective herbicidal effect (vineyard, orchard) that obtains perennial crop.

Accord with method of the present invention and composition and also may prevent and treat the plant (especially weeds) of growth apace, herbicidal effect is becoming soon obviously after treatment and effectively [is playing a role faster than the independent herbicides of glyphosate type (when using high dose) that uses.

Method according to the invention also can be avoided the leaching of glyphosate or its derivative.Content of the present invention also relates to a method, can avoid glyphosate or accord with the leaching of one of its derivative of aforementioned chemical formula (I), described method is characterized in that: according to front definite dosage and weight ratio, use one of its derivative of glyphosate or chemical formula (I), and a kind of compound of fiting chemical formula (VIII).

When reality was used method of the present invention, the composition of weed killer herbicide often contained one or more ingredients that are different from glyphosate type compound and their derivative (hereinafter being called active ingredient).These compositions (can be used as weed killer herbicide) contain and are equipped with agricultural and go up acceptable solid or liquid support and agricultural and go up acceptable surfactant.Common inert carrier and common surfactant are operable.These are formed and also belong to a part of the present invention.

These compositions also can contain other ingredient; as protecting colloid, adhesive, thickener, thixotropic compound, penetration aid, activator (synergist), stabilizing agent, sequestering agent etc., and known other active ingredient that has agricultural chemicals characteristic (especially insecticide, fungicide or weed killer herbicide) or have the plant growth regulating characteristic.More common is that employed composition can contain all and accord with solid or the liquid additive that process preparation is practised Chang Fangfa among the present invention.

In the following description of the present invention, percentage calculates with weight percent, unless otherwise prescribed.

Activator is such some compounds, and they can not be cut weeds in normal dose (about 0.5～5 kilogram/hectare) time usually, but they present the activity of weeding that can increase the glyphosate type compound significantly.These activator major parts are well-known.Some activator is a surfactant, as hereinafter described, and many ethoxylated derivatives of (benzene) phenolic alcohol or amine especially.Some activator is an ammonium salt, especially inorganic or organic chloride, sulphate, the phosphate of ammonium.Other activator also can utilize.The activator that can improve the activity of weeding of glyphosate type compound usually also is effective (when using the derivative of phenoxy group nitrobenzoic acid) in the present invention.The activation dosage that is utilized in composition of the present invention can contain the glyphosate type compound amount between about 0.1% and about 500%, and is preferably between about 50% and about 350%.This percentage depends on the specific properties of the activator that is utilized.

The dosage of employed compound can change in the scope of broadness among the present invention, especially is subjected to the degree of weeds infringement according to the attribute of need killing off plant and/or crop.

In general, composition according to the invention contains have an appointment 0.05 to about 95% a kind of or several usually and accords with active ingredient of the present invention, about 1% to about 95% a kind of or several solids or liquid support, and a kind of or several surfactants of optionally getting about 0.1% to about 50%.

Preferably, form and to comprise 10% to 50%(in gross weight) chemical formula (I) and two kinds of active substances of (VIII), preferred 15% to 30%.

Accord with and above once mentioned, among the present invention employed active ingredient is equipped with carrier usually and optionally is equipped with surfactant.

In the present invention described, term " carrier " was meant organic or inorganic, natural or synthetic a kind of ingredient, and several active ingredients cooperate carrier so that dispenser on plant, seed or soil.So this carrier generally is an inertia, and it should be acceptable on agricultural, is acceptable for pending plant particularly.Carrier can be solid (clay, natural or synthetic silicate, silica, resin, wax, solid fertilizer etc.) or liquid (water, alcohols, especially butanols); Ester class (particularly methyl glycol acetate); Ketone (particularly cyclohexanone and isophorone); Petroleum cuts; Alkane or aromatic hydrocarbons (particularly dimethylbenzene); Chlorination aliphatic hydrocarbon (particularly trichloroethanes), or chlorinated aromatics (particularly chlorobenzene); Water miscible solvent (as dimethyl formamide, dromisol or N-Methyl pyrrolidone); Liquid gas etc.

Surfactant can be emulsifier, dispersant or wetting agent or these surfactant mixtures of a kind of ionic or nonionic.Example comprises polyacrylate; lignosulphonates; benzene sulfonic acid salt or naphthalenesulfonate; oxirane and aliphatic alcohols; the polycondensation product of fatty acid or fatty amine; the phenols (particularly induced by alkyl hydroxybenzene or aryl phenols) that replaces; sulfosuccinate ester salt; taurine derivatives (particularly alkyltaurate); the phosphoric acid ester of the polycondensation product of the phosphoric acid ester of alcohols or oxirane and phenols; the ester class of fatty acid and polyalcohol and above-claimed cpd have sulphate; the derivative of sulfonate and phosphate instrumentality.Usually the existence that has a kind of surfactant at least is well-thought-of.

For it uses, the active ingredient that is used for the present invention generally is to occur with composition form.Accord with these compositions of the present invention and itself be various forms solid or liquid.Composition form of the present invention comprises water solube powder (have active ingredient content and can reach 80%) and water-soluble granular formulation, particularly by the extruding of a kind of bead-type substrate, compacting, dipping gained granule, perhaps from a kind of powder and aqueous solution granulation gained granule, (active ingredient content is to be included between about 0.5% and about 80% in these granules under latter instance).

Solution or water-soluble concentrating agents (especially pulvis or granule) often contain 5% to about 80% the active ingredient of having an appointment, and generally contain 0.01% to about 20% the active ingredient of having an appointment and prepare the emulsion used or solution.Except that this agent, solution or concentrating agents can contain 2% to about 50% the appropriate addn of having an appointment, as stabilizing agent, surfactant, penetration aid, and corrosion inhibitor, dyestuff or adhesive.

Be particularly suitable for all can obtaining by dilute with water from these concentrating agents to any emulsion that must concentration of chemical applied to plants.

The dispersant of confession sprinkling usefulness or solution or moisture intermixture all can be applied on the crop plant that needs weeding by arbitrary suitable manner, and for example by means of nebulization, the medication ratio is generally the order of magnitude of about 100～1200 liters of spraying mixtures of per hectare.

Accord with the dispenser that composition of the present invention is applicable to plant, particularly be applied to weeds to be eliminated, when manifesting greenery for these weeds.

Following limiting examples illustrates the present invention visually, and its application mode can be undertaken by practice.

Implement 1: the weed killer herbicide behind the various plant lines buds is used (in greenhouse)

Several alms bowls of 7 * 7 * 8 centimetres fill with cultivation with loose sandy soil, and according to the function and the seed thickness of plant lines, a quantity of seeds are implanted in the soil.

Then, with the soil covering seed of about 3 millimeters thick of one deck, and allow seed germination grow into a suitable stage until tender seedling.It the processing stage of for gramineous plants " the second leaf one-tenth " stage.It the processing stage of dicotyledon the stage of " cotyledon launches and first true leaf is grown ".

Yet being equivalent to dispenser dosage (by volume) by sprinkling is that 500 liters/hectare amount is handled alms bowl, wherein contains the active substance of desired concn.Contain a kind of for the mixture that sprays usefulness: promptly for the mixed mixture of bucket

One water,

The aqueous solution of the acifluofene-sodium of-a kind of 240 grams per liters (concentration is grams per liter, and dosage is gram/hectare, relates to the sour form of acifluofene),

The salt of the isopropylamine of the N-phosphono-methyl-glycine of-a kind of 360 grams per liters (it is the sour form of glyphosate, and concentration is that grams per liter and dosage are gram/hectare, relates to the form of acid), it also contains the surface active agent of 15% polyethoxylated derivative type.

The various concentration of employed spraying liquid active substance are all corresponding to the various dose of the active substance of using.

Then the alms bowl of treated mistake is placed by subsurface irrigation and can accept in the container of irrigation water, and make it to remain on environmental temperature and assign 24 days (relative temperature is 70%).

13 and 29 days after treatment, calculate survival plant number in the treated alms bowl by containing the spraying liquid that remains to be tested active substance, and similarly by identical conditions, by means of the number of the contrast alms bowl internal memory living plant that does not contain the computing of active substance spraying liquid.Percentage equals the destruction fully of 100% plant lines that expression is considered, and the plant number that percentage equals to survive in the 0% expression processing alms bowl is the number that is equal to the survival plant in the control group.

The plant lines that is utilized in example 1 is: Pharbitis purpurea (Ipomoea purpurea) and vegetables kitchen garden (Portulaca oleracea).

The evidence of carrying out accords with composition of the present invention, and post processing has remarkable early stage herbicidal effect (seeing table I, II and the III of Ben Wenmo) for bud.

Implement 2. field trials

The arable land is divided into 5 square metres fritter.Several strains of sowing in each fritter, the row distance is 15 centimetres.These strains comprise following monocotyledon:

Wild oat: (Avena fatua) (AVEFA)

Barnyard grass: (Echinochloa crus-galli) (ECHCG)

Annual Ryegrass (Lolium multiflorum) (LOLMU)

Broomcorn millet: (Panicum miliaceum) (PANM I)

And following broadleaf weed:

A west wind left side: (Amaranthus retroflexus) (AMARE)

Wild mustard: (Sinapis arvensis) (SINAR)

When all these plant reached at least 2～3 leaf stages, i.e. after planting about three weeks, apply the processing (active ingredient of the mixed debita spissitudo of preparation bucket and be sprayed on the plant of enrank by 500 liters/hectare capacity; So that obtain suitable destruction ratio.A undressed splat is placed on each splat of handling and adjoins as a comparison and record.Locate time record after the processing at set intervals, and represent it (comparing) with the same strain in the undressed splat with the destruction percentage of each strain.

Handle and observed herbicidal effect in back 5 days.Use above identical active ingredient and dosage in the example.Can be observed and send out herbicidal effect remarkable morning, shown in the table IV of the end of writing.

In this embodiment, handle one 20 millimeters rain-out was arranged in back 15 hours plant.

Claims (7)

1, a kind of Herbicidal combinations that contains herbicides of glyphosate type and phenoxy benzoic acid type weed killer herbicide, wherein herbicides of glyphosate type be selected from N-(phosphono-methyl) glycine [N-(pho-phonomethyl) glycine] or it by methylamine, ethamine, the organic ammonium salt that n-propylamine or isopropylamine spread out; And phenoxy benzoic acid type weed killer herbicide is selected from acifluorfen or its sodium salt is characterized in that the weight ratio of phenoxy benzoic acid type weed killer herbicide and herbicides of glyphosate type is between 1: 12 to 1: 80.

2, Herbicidal combinations as claimed in claim 1 is characterized in that wherein the weight ratio of phenoxy benzoic acid type weed killer herbicide and herbicides of glyphosate type is between 1: 15 to 1: 5.

3, Herbicidal combinations as claimed in claim 1 is characterized in that glyphosate herbicidal wherein is the N-(phosphono-methyl) isopropyl amine salt of glycine, and phenoxy benzoic acid type weed killer herbicide is acifluorfen sodium (acifluorfen-sodium).

4, a kind of processing method to the weeds after growing, it is characterized in that on weeds, using the herbicides of glyphosate type of effective quantity as claimed in claim 1 and the phenoxy benzoic acid type weed killer herbicide of some, the dosage of herbicides of glyphosate type is between 0.125 to 0.9kg/ha, the dosage of phenoxy benzoic acid type weed killer herbicide is between 0.005 to 0.1kg/ha, and the weight ratio of phenoxy benzoic acid type weed killer herbicide and herbicides of glyphosate type is between 1: 12 and 1: 80.

5, as claimed in claim 4 to growing the processing method of back weeds, it is characterized in that wherein the better dosage of herbicides of glyphosate type is to 0.400kg/ha 0.125.

6, as claimed in claim 4 to growing the processing method of back weeds, it is characterized in that wherein the weight ratio of phenoxy benzoic acid type weed killer herbicide and herbicides of glyphosate type is between 1: 15 to 1: 50.

7, Herbicidal combinations as claimed in claim 1 is to prepare dilute with water and be applied on the plant, it is characterized in that it contains the glyphosate herbicidal of 10% to 50% weight and the mixture of phenoxy benzoic acid type weed killer herbicide.