Method of weed control

 

(57) Abstract:

Usage: agriculture, chemical method of plant protection. The inventive plots that are to be protected from weeds, process pyrimidine derivative of the formula where R is hydrogen, lower alkyl, C1-C2-alkoxymethyl, benzoyloxymethyl, ethoxycarbonylethyl, cyanoethyl or group , where R1is hydrogen, methyl; R2is methyl, nezameshchenny or substituted by a nitro-group is phenyl; X is halogen, methyl, methylphenoxy, or its salt in the amount of 0.16-10 g/ar. 13 table.

The invention relates to chemical methods of plant protection.

Know the use of substituted pyrimidines, for example, 2-/4,6-dimethoxy-pyrimidin-2-yl/tio/benzoic acid in the method of weed control. However, the known method has insufficient herbicide action.

The aim of the invention is the enhancement of herbicide action.

The objective is achieved by processing the area to be protected from weeds, pyrimidine derivative of the formula

(I) where R is hydrogen, lower alkyl, C1-C2- alkoxymethyl, benzoyloxymethyl, ethoxycarbonylethyl, cyanoethyl or the group --SR2; R1is hydrogen, methyl; R the number of 0.16-10 g/ar.

In the method used compounds listed in table. 1.

The connection from the table. 1 was produced using the following process, which, in particular, it is possible to obtain compound 2.

Getting 2-/(4,6-dimethoxypyrimidine-2-yl)thio/-6-methylbenzoic acid (compound 2).

5.0 g of the hydrochloride of 2-amino+6-methylbenzoic acid is turned into salt, page by using concentrated hydrochloric acid and 2.3 g of sodium nitrite. Then gradually dropwise salt, page add in a pre-prepared solution of sodium disulfide (obtained from 8.7 g of nonahydrate of sodium sulfide, 1.1 g of sulfur, 1.5 g of sodium hydroxide and 15 ml of water) at 0-5aboutC. After completion of adding dropwise, the mixture is stirred at room temperature for 2 h to complete the reaction. The reaction solution was poured into a large amount of water and add concentrated hydrochloric acid. The mixture is then extracted with ethyl acetate. An aqueous solution of vodorodovorot sodium add in a layer of ethyl acetate and soluble components bookabout sodium is extracted. 5.8 g of persulfate sodium added to this aqueous solution and the mixture is distilled for 30 min to complete the reaction. Concentrated hydrochloric cut and then the solvent is distilled under reduced pressure to obtain 3.6 g (yield 65%) of 2-mercapto-6-methylbenzoic acid.

Then 3.6 g of 2-mercapto-6-methylbenzoic acid, 4.7 g of 4,6-dimethoxy-2-methylsulfonylamino and 3.5 g of anhydrous potassium carbonate was dissolved in 20 ml of dimethylformamide, after which the mixture was stirred at 110-120aboutC for 1 h the Reaction solution was poured into a large amount of water and add concentrated hydrochloric acid. The mixture is then extracted with chloroform. The chloroform layer is washed with water and dried, whereupon the solvent is distilled off under reduced pressure. Raw crystals purified using chromatography on columns using a developing solvent of hexane/ethyl acetate and recrystallized from ethyl acetate to obtain 0.8 g of 2-[(4,6-dimethoxypyrimidine-2-yl)thio]-6-methylbenzoic acid as a white powder. The melting point of 131-132aboutC.

Other connections get the same way.

The present invention is illustrated by the following examples.

P R I m e R 1 (tillage on emergence of seedlings of weeds on the hills).

In pots filled with soil (surface area of 600 cm2), were sown the seeds of cotton (Co), millet, chicken (EU), Guma (So), mountain pepper (Ro), amaranth (Am), Marie white (WY thickness of 0.5-1 see A day after landing a specified quantity of the wetting of the powder prepared according to the composition of example 1 was diluted with water and applied on the soil surface if the flow rate of 100 l/10 acres. The evaluation was conducted on the 20th day after the treatment. The results were evaluated according to the standard, as shown in the table. 2 and listed in table. 3, 4.

P R I m m e R 2 (processing leaves after germination of weeds in upland).

In pots filled with soil (surface area of 600 cm2), were sown the seeds of cotton (Go), millet, Chicken (EU), Guma (So), mountain pepper (Ro), amaranth (Am), Marie white (Sh), purple bindweed (Ip) and Xanthium strumarium L. (Ha), planted potatoes yperus rotundus (SG) and covered with a soil layer of thickness 0.5-1 cm Pots stood in a greenhouse at a temperature of 20-25aboutWith in 2 weeks, and then the specified number of wettable powder was diluted with water and made into sheets with a consumption rate of 100 l/10 acres on the active substance. The evaluation was conducted on the 14th day after treatment. The results are shown in table. 5 and 6.

P R I m e R 3 (processing leaves on the hill).

In pots filled with soil (surface area 100 cm2), were sown millet, chicken (EU), the weed blood (D in a greenhouse at a temperature of 20-25aboutWith two weeks and then the specified number of wettable powder prepared according to example 1, was diluted with water and made into sheets with a consumption rate of 100 l/10 acres (usage rate for D. C. - 100 g/10 acres). The evaluation was conducted for 14 days after application of herbicides. The results are shown in table. 7, 8.

P R I m e R 4 (tillage on the hill).

In pots filled with soil (surface area 100 cm2), were sown millet, chicken (EU), the weed blood (Di), Highlander pepper (Ro), amaranth (Am), white pigweed (CH) and yperus iria (CI) and covered with a soil layer of thickness 0.5-1 cm, a day after landing a specified number of wettable powder prepared according to example 1, was diluted with water and brought to the surface of the soil at a rate of 100 l/10 acres (usage rate for D. C. 10 g/10 acres). The evaluation was conducted on the 20th day after the treatment. The results are shown in table. 9, 10.

P R I m e R 5 (weed control in rice field).

In pots filled with soil of rice fields were sown millet, chicken (EU), Cyperus iria (CD), Monocloria vaginalis (Mo) and bulrush (Sc) and added water to a depth of 2 cm in 2 days after planting specified number of wettable powder prepared according to example custodies on day 21 after treatment. The results are shown in table. 11.

P R I m e R 6 (soil treatment before emergence of weeds in upland field).

In a pot filled with soil (surface area of 600 cm2), were sown the seeds of cotton (Go), Guma (So), mountain pepper (Ro), chirici hybrid (S) and Mary white (CH) and covered them with soil of a thickness of from 0.5 to 1 see Through one day after seeding a predetermined amount of wettable powder obtained in accordance with example 1, was diluted with water and applied on the soil surface at the rate of 100 l / 10, ar. The evaluation was made on the 20th day after the treatment. The results are shown in table. 12.

P R I m e R 7 (spraying the leaves after the emergence of weeds in upland field).

In a pot filled with soil (surface area of 600 cm2) were sown the seeds of cotton (very well), Guma (So), mountain pepper (Ro), chirici hybrid (S) and Mary white (CH) and covered them with soil of a thickness of from 0.5 to 1 see This powder was placed in a greenhouse with temperatures ranging from 20 to 25aboutWith 2 weeks, after which a predetermined amount of the wettable powder obtained in accordance with example 1, was diluted with water and applied to the leaves at the rate of 100 l / 10, ar. The evaluation was made on 14 - section, be protected from weeds pyrimidine derivative, characterized in that, in order to enhance herbicide activity, as derived pyrimidine is used as a compound of General formula

< / BR>
where R is hydrogen, lower alkyl, C1-C2-alkoxymethyl, benzoyloxymethyl, ethoxycarbonylethyl, cyanoethyl or group

--SR2< / BR>
where R1is hydrogen, methyl;

R2is methyl, unsubstituted or substituted by a nitro-group, phenyl;

X is halogen, methyl, methylphenoxy,

or its salt in the amount of 0.16 - 10 g/ar.

 

Same patents:

The invention relates to new biologically active compounds - derivatives of pyrimidine exhibiting herbicide activity, which can find application in agriculture

The invention relates to pyrimidine derivative of the General formula I:

where R1- alkyl-(C1-C4), O-alkyl-(C1-C4), halogen;

R2- alkyl-(C1-C4), O-alkyl-(C1-C4);

n = 3-5;

Z = COOH, COO-alkyl-(C1-C4), CONHSO2C6H5with herbicide activity, and to a method of controlling undesirable vegetation by processing them in the locus, namely, that the treatment is carried out pyrimidine derivatives of General formula I:

where R1- alkyl-(C1-C4), O-alkyl-(C1-C4), halogen;

R2- alkyl-(C1-C4), O-alkyl(C1-C4);

n = 3-5;

Z = COOH, COO-alkyl-(C1-C4), CONHSO2C6H5in the amount of 1-10 kg/ha

The invention relates to methods of producing derivatives of 2-anilinopyrimidines or acid additive salts of novel biologically active compounds, which can find application in agriculture

The invention relates to derivatives of 2,4-bis-(pyridine)hintline, which can find application in agriculture for cotton defoliation

The invention relates to chemical means of plant protection specifically to the herbicide agent on the basis of sulfonylurea derivatives and method of weed control using herbicide tools

Fungicidal tool // 2002416

FIELD: organic chemistry, herbicides, agriculture.

SUBSTANCE: invention describes substituted benzoylcyclohexanediones of the general formula (I):

wherein m = 0 or 1; n = 0 or 1; A means a single bond or alkanediyl (alkylene) with 1-4 carbon atoms; R1 means hydrogen atom or unsubstituted alkyl with from 1 to 6 carbon atoms; R2 means methyl; R3 means hydrogen atom, nitro-, cyano-group, halogen atom, alkyl with from 1 to 4 carbon atoms substituted with halogen atom, alkoxy-group with from 1 to 4 carbon atoms or alkyl sulfonyl with from 1 to 4 carbon atoms; R4 means nitro-group, halogen atom, unsubstituted alkyl with from 1 to 4 carbon atoms of that substituted with halogen atom; Z means heterocycle, and herbicide agent based on thereof. Also, invention describes substituted derivatives of benzoic acid of the general formula (III):

wherein values n, A, R3, R4 and Z are given above. These compounds represent the parent substances used for preparing compound of the formula (I). Compounds of the formula (I) elicit high and selective herbicide activity.

EFFECT: valuable properties of compounds.

7 cl, 8 tbl, 7 ex

FIELD: agriculture, in particular herbicide compositions.

SUBSTANCE: invention relates to weed controlling method for tolerant cotton crops using (A) road spectrum herbicides selected from group (A1) glufosinate (salt) and related compounds; (A2) glyphosate (salt) and related compounds; and (B) herbicides selected from group containing diurone, trifluraeline, linuron, and pendimethalin; lactofen, oxyfluoren, bispiribac and salts thereof, pyrithiobac and salts thereof; setoxydim, cyclosidim, and cletodim; wherein components (A) and (B) are used in synergistically effective ratio. Also are described herbicide compositions containing compound from group (A1) or (A2) and herbicide from group (B).

EFFECT: effective controlling of weeds in cotton crops.

9 cl, 12 tbl, 3 ex

FIELD: organic chemistry, agriculture.

SUBSTANCE: method involves carrying out a seasonal single treatment of plant leaves with asymmetrical derivative of 4,6-bis-(aryloxy)pyrimidine of the formula: wherein X means chlorine atom (Cl), nitro- or cyano-group. Invention provides enhancing the long-term time of plants protection.

EFFECT: enhanced effectiveness and valuable properties of compounds.

6 cl, 6 tbl

FIELD: organic chemistry, herbicides, agriculture.

SUBSTANCE: invention relates to new derivatives of uracil of the formula [I] eliciting the herbicide effect, herbicide composition based on thereof and a method for suppression of weed growth. In the formula [I] W means oxygen (O), sulfur (S) atom or imino-group; Y means oxygen atom (O) or sulfur atom (S); R1 means (C1-C3)-alkyl or (C1-C3)-halogenalkyl; R2 means (C1-C3)-alkyl; R4 means hydrogen atom (H) or methyl; R5 means (C1-C6)-alkyl, (C1-C6)-halogenalkyl, (C3-C6)-alkenyl, (C3-C6)-halogenalkenyl, (C3-C6)-alkynyl or (C3-C6)-halogenalkynyl; X1 means halogen atom, cyano- or nitro-group; X2 means hydrogen atom (H) or halogen atom; each among X3 and X4 means independently hydrogen atom (H), halogen atom, (C1-C6)-alkyl, (C1-C6)-halogenalkyl, (C3-C6)-alkenyl, (C3-C6)-halogenalkenyl, (C3-C6)-alkynyl, (C3-C6)-halogenalkynyl, (C1-C6)-alkoxy-(C1-C6)-alkyl, (C1-C6)-alkoxy-, (C1-C6)-halogenalkoxy-, (C1-C6)-alkoxycarbonyl-(C1-C6)-alkoxy- or cyano-group. Also, invention relates to new intermediate substances used for preparing compounds of the formula [I] corresponding to formulae [VII] , [XXXIV] and [XXXIII] wherein in compound of the formula [VII] W means oxygen (O), sulfur (S) atom or imino-group; Y means oxygen (O) or sulfur atom (S); in compounds of formulae [XXXIV] and [XXXIII] W means oxygen atom (O); R17 means oxygen atom (O); R4 means hydrogen atom (H) or methyl. Also, invention relates to methyl- or ethyl-[2-(5-amino-2-chloro-4-fluorophenoxy)phenoxy]acetate not early described in the literature.

EFFECT: valuable herbicide properties of compounds.

23 cl, 17 sch, 9 tbl, 11 ex

FIELD: organic chemistry, agriculture.

SUBSTANCE: invention relates to selective herbicidal compositions, containing customary auxiliary substances, as well as: a) herbicidal effective amount of compound of formula I or agriculture acceptable salt thereof wherein R are independently C1-C6-alkyl, C1-C6-haloalkyl, C1-C4-alcoxy-C1-C4-alkyl, or C1-C4-alcoxy-C1-C4-alcoxy-C1-C4-alkyl; m = 2; Q is group of formula wherein R23 is hydroxyl and Y is C1-C4-alkylen bridge; and b) synergetically effective amount of one or more herbicides; and methods for controlling of undesired plants in tame cultures using the said composition. Also disclosed is composition containing customary auxiliary substances, as well as herbicidal and synergetically effective amount of 4-hydroxy-3-(2-methyl-6-trifluoromethylpyridine-3-carbonyl)bicyclo[3.2.1]octo-3-ene-2-one of formula 2.2 and herbicidal antagonistically effective amount of antidote of formula 3.1. Compositions based on 4-hydroxy-3-(2-methyl-6-trifluoromethylpyridine-3-carbonyl)bicyclo[3.2.1]octo-3-ene-2-one and herbicidal antagonistically effective amount of antidote, as well as methods for controlling of weeds and cereal grasses in tame cultures also are described.

EFFECT: compositions useful in effective controlling of many weeds both in pre-spring and post-spring phases.

5 cl, 63 tbl, 12 ex

FIELD: organic chemistry, herbicides, agriculture.

SUBSTANCE: invention elates to novel derivatives of uracil of the formula [I] possessing herbicide activity, a herbicide composition based on thereof and to a method for control of weeds. In derivatives of uracil of the formula [I] the group Q-R3 represents a substituted group taken among:

wherein a heterocyclic ring can be substituted with at least a substitute of a single species taken among the group involving halogen atom, (C1-C6)-alkyl-(C1-C6)-alkoxy; Y represents oxygen, sulfur atom, imino-group or (C1-C3)-alkylimino-group; R1 represents (C1-C3)-halogenalkyl; R2 represents (C1-C3)-alkyl; R3 represents OR7, SR8 or N(R9)R10; X1 represents halogen atom, cyano-group, thiocarbamoyl or nitro-group; X2 represents hydrogen or halogen atom wherein each among R7, R8 and R10 represents independently carboxy-(C1-C6)-alkyl and other substitutes given in the invention claim; R9 represents hydrogen atom or (C1-C6)-alkyl. Also, invention relates to intermediate compounds used in preparing uracil derivatives.

EFFECT: improved preparing method, valuable properties of compounds.

40 cl, 16 sch, 12 tbl, 65 ex

FIELD: organic chemistry, chemical technology, herbicides, agriculture.

SUBSTANCE: invention relates to new sulfonamides of the formula (I):

and their salt wherein A represents substituted or unsubstituted benzene ring or 5-membered, or 6-membered substituted or unsubstituted heteroaromatic ring taken among the group comprising thienyl, pyrazolyl, imidazolyl, pyridyl wherein optional substitutes are taken among the group consisting of halogen atom, substituted or unsubstituted (C1-C4)-alkyl, unsubstituted or substituted (C1-C4)-alkoxy-group, nitro-group, phenyl, phenoxy-group, benzoyl and (C1-C4)-alkylcarboxylate when any alkyl fragment in the latter indicated substituted is substituted with one or some halogen atoms, (C1-C4)-alkoxy-groups, cyano-group and phenyl; Q represents -O-, -S- or group of the formula: -CXX' wherein X and X' can be similar or different and each represents hydrogen atom, halogen atom, cyano-group, alkyl comprising 1-8 carbon atoms, or the group -ORa, -SRa; or one of X and X' represents hydroxy-group and another has values determine above; Ra means (C1-C8)-alkyl, phenyl; Rb means (C1-C8)-alkyl, phenyl; Y means nitrogen atom or the group CR9; R1 means unsubstituted (C1-C8)-alkyl or that substituted with halogen atom, cyano-group, phenyl or (C1-C4)-alkoxycarbonylamino-group, or it represents phenyl; R2 means hydrogen atom (H), (C1-C4)-alkyl; R3 and R4 can be similar or different and each represents (C1-C4)-alkyl, (C1-C4)-alkoxy-group, halogen atom; R9 means hydrogen atom (H) under condition that when Q represents oxygen atom (O) or -S- then ring A represents 5-membered substituted or unsubstituted heteroaromatic ring and determined above. Compounds of the formula (I) possess the herbicide activity that allows their using for eradication of weeds. Also, invention describes a method for preparing compounds of the formula (I).

EFFECT: improved preparing method, valuable properties of compounds.

9 cl, 5 tbl, 18 ex

FIELD: organic chemistry, agriculture.

SUBSTANCE: invention relates to pest controlling agents containing compound of formula I in mixture with active fungicidal material selected from azoxystrobin, tebuconazol, prothioconazol etc., in mass ratio of formula I/active fungicidal material providing marked synergic action.

EFFECT: enhanced assortment of pest controlling agents based on nitromethylene derivatives.

2 cl, 15 tbl, 9 ex

FIELD: agriculture, fungicides.

SUBSTANCE: claimed method includes treatment of contaminated cultural plants or cultivation area thereof with effective amount of composition, containing A) N-sulfonylvaline amide of formula I 1, wherein R1 represents hydrogen or haloprenyl; and R1 represents C1-C4-alkyl, in combination with B) methalaxyl, or fluozinam, or mancoceb, or chlorithalonyl, or strobyluzine, or pyraclostrobine, or acibenzolar-S-methyl, or dimethoform, or fludioxonyl, or cimoxanyl, or imazalyl in synergistically effective amounts. Fungicide composition containing effective combination of A and B in synergistically effective amounts in combination with agriculturally acceptable carrier and optionally with surfactant.

EFFECT: composition of increased fungicidal action due to synergic effect.

8 cl, 12 ex

Herbicidal agent // 2271659

FIELD: organic chemistry, agriculture, herbicides.

SUBSTANCE: invention relates to herbicidal agent containing compound of general formula I wherein X represents residue X1 or X2 and Z, R1 and R2 are as defined in claim of invention, and additional active substance selected from group containing bromoxynil, dicamba, flufenacete, metolachlor, atrazine, pendimethaline, imazetapir, iodosulfuron, nicosulfuron, 2-amino-4-(1-fluoro-1-methyl)-6-(3-phenyl-1-cyclobuthyl-1-propylamino)-1,3,5-triazine and N-[(4,6-dimethoxy-pyrimidine-2-yl)-aminocarbonyl]-2-dimethylamino-carbonyl-5-formyl-benzenesulfonamide. Compound of formula I and additional active substance are taken in mass ratio of 1:20-10:1, respectively.

EFFECT: agent of high herbicidal activity.

6 cl, 15 ex

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