ES2354458T3 - HERBICIDE COMPOSITION. - Google Patents

Abstract

A herbicidal composition containing (A) 2- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -N, Ndimethylnicotinamide or its salt and (B) N 2 -terc-butyl-6-chloro-N 4 -ethyl-1, 3,5-triazin-2,4-diamine or its salt, in which the mixing ratio of (A) and (B) is such that (B) is 0.5 to 1,000 parts by weight per 1 part in weight of (A).

Description

TECHNICAL FIELD

 The present invention relates to a herbicidal composition containing (A) 2- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -N, N-dimethylnicotinamide or its salt (hereinafter referred to herein simply as "compound A)" and (B) N2-tert-butyl-6-chloro-N4-ethyl-1,3,5-triazin-2,4-diamine or its salt (hereinafter referred to simply as "compound B").

PREVIOUS TECHNIQUE

 Patent document 1 discloses compound A but does not disclose its use in combination with compound B. 10

 Patent document 1: EP0232067A WO 03/073853, DE 19520839, W093 / 21772 and Rolston et al. "Grass weed control and herbicide tolerance in cereals", New Zealand Plant Protection, vol. 56, 2003, p. 220-226 reveals the synergistic mixture of terbutylazine with different sulfonylurea herbicides.

DESCRIPTION OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION 15

 Many herbicidal compositions have been developed and used in practice. However, there are also many types of weeds that must be controlled and their appearance extends over a long period of time. Therefore, it is desired to develop a herbicidal composition that has a broader herbicidal spectrum, that is very active and that has a lasting effect.

MEANS TO SOLVE PROBLEMS 20

 The present inventors have carried out an investigation to solve the above problems and, as a consequence, have found that it is possible to obtain a very practical herbicidal composition.

 Specifically, the present invention provides a herbicidal composition containing (A) compound A, that is, 2- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfmoyl) -N, N-dimethylnicotinamide (common name: nicosulfuron) or its salt and (B) compound B, that is, N2-tert-butyl-6-chloro-N4-ethyl-1,3,5-triazin-2,4-diamine (common name: terbutylazine) or its salt.

 In addition, the present invention provides a method of controlling unwanted plants or inhibiting their growth, which comprises applying an amount of the herbicide composition, herbicidally effective, to unwanted plants or to a place where they grow. 30

 In addition, the present invention provides a method of controlling unwanted plants or inhibiting their growth, which comprises applying herbicidally effective amounts of compounds A and B, to unwanted plants or to a place where they grow.

EFFECTS OF THE INVENTION

 The herbicidal composition of the present invention, that is, the herbicidal composition that includes compounds A and B, is capable of controlling a wide variety of weeds that appear on arable and non-cultivated land and, surprisingly, has an effect synergistic herbicide, that is, a herbicidal effect superior to the mere addition of the respective herbicidal effects of the active ingredients. With said herbicidal composition of the present invention, not only can it be applied in a small dose, compared to a case in which the respective active ingredients are applied individually, but also the herbicidal spectrum will be extended, and also the herbicidal effects They will last a long period of time.

 When the herbicidal activity, in a case where two active ingredients are combined, is greater than the simple sum of the respective herbicidal activities of the two active ingredients (the expected activity), it is called a synergistic effect. The expected activity of the combination of two active ingredients can be calculated as follows: (Colby S.R., "Weed", vol. 15, p. 20-22, 1967).

where

: growth inhibition rate when treated with x (g / a) of herbicide X, 50

: growth inhibition rate when treated with y (g / a) of herbicide Y,

E: growth inhibition rate when treated with x (g / a) of herbicide X and y (g / a) of herbicide Y.

 Specifically, when the actual rate of growth inhibition (observed value) is greater than the rate of growth inhibition with the previous calculation (expected value), it can be considered that the activity in the combination shows a synergistic effect. The herbicidal composition of the present invention shows a synergistic effect when calculated with the above formula.

BEST MODE FOR CARRYING OUT THE INVENTION

 The salt included in compound A or B can be any salt, as long as it is agriculturally acceptable and can be, for example, an alkali metal salt, such as a sodium salt or a potassium salt; 10 an alkaline earth metal salt, such as a magnesium salt or a calcium salt; an ammonium salt, such as a monomethylammonium salt, a dimethylammonium salt or a triethylammonium salt; a salt of an inorganic acid, such as a hydrochloride, a perchlorate, a sulfate or a nitrate; or an organic acid salt, such as an acetate or a methanesulfonate.

 Like compound A, sometimes compounds having different crystalline forms can be obtained, depending on the production conditions. The present invention includes all those compounds and also includes compounds that have those hydrated compounds.

 In the present invention, the mixing ratio of compound A and compound B varies depending on different conditions, such as the formulation, the weather conditions, the types and growth conditions of the plants to be controlled and which, generally, You cannot define 20. However, compound B is in an amount of 0.5 to 1,000 parts by weight, preferably 0.5 to 600 parts by weight, more preferably 0.5 to 500 parts by weight, particularly preferably 1 to 250 parts. by weight, per 1 part by weight of compound A.

 The present invention includes the herbicidal composition having the mixing ratio mentioned above and a method of controlling unwanted plants or inhibiting their growth, which comprises applying a herbicidally effective amount of the herbicidal composition. In its application, you can optionally select the application to unwanted plants or the application to a place where they grow (before or after the appearance of unwanted plants).

 The amount of application of the herbicidal composition of the present invention cannot be defined in a general manner, since it varies depending on different conditions such as the mixing ratio of compound A and compound B, formulation, weather conditions, types and plant growth conditions to be controlled. However, compound A is usually 1 to 200 g / ha, preferably 2.5 to 100 g / ha, and compound B is normally 100 to 5,000 g / ha, preferably 200 to 2,500 g / ha. And the adequate total application amount of compounds A and B is usually 101 to 5,200 g / ha, preferably 202.5 to 2,600 g / ha. 35

 The present invention includes a method of controlling unwanted plants or inhibiting their growth, which comprises applying compound A and compound B in the respective application amounts mentioned above or applying them in the appropriate total application amount mentioned above. During the application you can optionally select the application to unwanted plants or the application to a place where they grow (before or after the appearance of the 40 unwanted plants).

 The herbicidal composition of the present invention is capable of controlling a wide variety of weeds, such as annual weeds and perennial weeds, with a small dose. Unwanted plants include grasses (or gramineae) such as toothed grass (Echinochloa crus-galli l), digitaria (Digitaria sanguinalis l), almorejo (Setaria viridis l), foxtail (Setaria faberi Herrm.), 45 miscanto (Eleusine indica l), crazy oatmeal (Avena fatua l), Aleppo sorghum (Sorghum ha-lepense l), grass (Agropiron repens l), savanna grass (Brachiaria plantaginea), grass pasture (Panicumpurpuras-cens), leptochloa chinensis (Leptochloa chinensis ), purple grass (Leptochloa panicea), winter pasture (Poa annua l), foxtail (Alopecurus myosuroides Huds.) and blue stem (Agropiron tsukushiense (Honda) Ohwi); cyperáceas (or Cyperaceae) such as rice sedge (Cyperus iria l), royal sedge (Cyperus 50 rotundus l), hazelnut sedge (Cyperus esculentus l), sedge (Cyperus serotinus) and water sedge (Cyperus difformis); and broadleaf, such as Asian mallow (Abutilon theophrasti MEDIC), purple bell (Ipomoea purpurea l), common name ash (Chenopodium album l), malvilla (Sida spinosa L), purslane (Portulaca oleracea l), green elbow (Amaranthus viridis l), bledo (Amaranthus retroflexus l), guanine (Cassia obtusifolia L), devil's tomatillo (Solanum nigrum l), partridge leg (Polygonum 55 lapathifolium l), chickweed (Stellaria half l), aquatic grass (Elatine triandra SCHK .), cadillo (Xanthium strumarium l), cardamine flexuosa (Cardamine flexuosa WITH.), dead nettle (Lamium amplexicaule l),

ambrosia (Ambrosia elatior l), hydrangea love (Galium spurium l), morning glory (Calystegia arvensis l), estramonium (Datura stramonium), thistle (Breea setosa (BIEB.) KITAM.) and copper foil (Acalypha australis l). In addition, the herbicidal composition of the present invention is capable of providing beneficial effects when applied at any stage, before or after germination of weeds. 5

 The herbicidal composition of the present invention can take various forms of application, such as soil application, foliar application, irrigation and water application, and is useful for controlling unwanted plants in agricultural fields, such as highland fields, of fruit orchards or rice fields, or non-agricultural fields, such as riversides, fallow fields, recreational parks, unoccupied lands, forests, factory grounds, railroad sides or roadsides. 10

 In addition, as long as the object of the present invention is fulfilled, the composition of the present invention may also contain other herbicidal active ingredients, apart from the active ingredients described above, with which it may sometimes be possible to improve, for example, herbicidal activities, the rate of herbicide application or the range of weeds to be controlled. This other active herbicidal ingredient includes, for example, the following 15 compounds (common names include ones whose approval is requested from ISO or developing codes), even if they are not specifically mentioned here, in case such compounds have salts, esters of alkyl, optical isomers, etc., are also included, of course.

(1) Those believed to have herbicidal effects by altering the hormonal activity of plants, such as a phenoxy type, such as 2,4-D, 2,4-DB, 2,4-DP, MCPA, MCPB, MCPP, naproanilide or clomeprop, an aromatic carboxylic acid type, such as 2,3,6-TBA, dicamba, diclobenyl, picloram, triclopyr, clopiralide or aminopiralide, and others such as naptalam, benazolin, quinclorac, quinmerac, diflufenzopir and thiazopir .

(2) Those believed to have herbicidal effects by inhibiting plant photosynthesis, such as a urea type, such as clortoluron, diuron, fluometuron, linuron, isoproturon, metobenzuron or 25 tebutiuron, a triazine type, such as simazine, atrazine , atratona, simetrina, prometrina, dimetametrina, hexazinona, metribuzina, cianazina, ametrina, cibutrina, triaziflam or propazina, an uracil type, such as bromacilo, lenacilo or terbacilo, an anilida type, such as propanil or cipromto, such a type such as swep, desmedifam or fenmedifam, a hydroxybenzonitrile type, such as bromoxynil, bromoxynil octanoate or ioxynil, and others, such as pyridate, bentazone, amicarbazone and methazole.

(3) Quaternary ammonium salt type, such as paraquat or diquat, which is believed to convert itself into free radicals to form active oxygen in the plant body.

(4) Those believed to have herbicidal effects by inhibiting the chlorophyll biosynthesis of plants, and abnormally accumulating a photosensitive peroxide substance in the body of the plant, such as a diphenyl ether type, such as nitrophene, chloromethoxyphene, Bifenox, sodium acifluorphene, fomesaphene, oxyfluorfen, lactophen or ethoxyphene-ethyl, a cyclic imide type, such as chlorftalim, flumioxazin, flumiclorac-pentyl or flutiacet-methyl, and others, such as oxadiargyl, tiantherazine, oxadiazoniazidiazine , pentoxazone, azafenidine, isopropazol, piraflufen-ethyl, benzfendizona, butafenacil, metobenzuron, cinidon-ethyl, flupoxam, fluazolate, profluazole, 40 piraclonyl, flufenpyrethyl and bencarbazone.

(5) Those believed to have herbicidal effects characterized by bleaching activities by inhibiting the chromogenesis of plants, such as carotenoids, such as a pyridazinone type, such as norflurazon, chloridazon or metflurazón, a pyrazole type, such as pyrazolate, pyrazoxyphene , benzofenap, topramezone (BAS-670H) or pyrasulfotol, and others, such as amitrole, fluridone, flurtamone, diflufenican, methoxypheone, clomazone, sulcotrione, mesotrione, tembotrione, tefuriltriona (AVH-301), isoxaflutolbonic, diphenoquatolbic, diphenoquatolicoton, diphenoquatotholbothol, isoxaflutolbothol, isoxaflutolbotol, diphenoquatotholbonic acid, diphenoquatotholbothol, isoxafluclotholbonic acid , picolinaphene and beflubutamide.

(6) Those that have strong specific herbicidal effects for grass plants, such as an aryloxyphenoxypropionic acid type, such as diclofop-methyl, flamprop-M-methyl, sodium pyrifenop-50, fluazifop-butyl, haloxyfop-methyl, quizalofop-ethyl , cihalofop-butyl, phenoxaprop-ethyl or metamifop-propyl, and a cyclohexanedione type, such as aloxidim-sodium, cletodim, setoxidim, tralcoxidim, butroxidim, tepraloxidim, caloxidim, clefoxidim or profoxidim.

(7) Those that are believed to have herbicidal effects by inhibiting the biosynthesis of an amino acid from plants, such as a sulfonylurea type, such as chlorimuron-ethyl, sulfometuron-methyl, primisulfuron-methyl, bensulfuron-methyl, chlorofulfuron, metsulfuron -methyl, cinosulfuron, pyrazulfuron-ethyl, azimsulfuron, flazasulfuron, rimsulfuron, imazosulfuron, cyclosulfamuron,

prosulfuron, flupyrsulfuron, triflusulfuron-methyl, halosulfuron-methyl, thifensulfuron-methyl, ethoxysulfuron, oxasulfuron, ethametsulfuron, iodosulfuron, sulfosulfuron, triasulfuron, tribenuron-methyl, tritosulfuron, foramsulfuron, trifloxysulfuron, isosulfurón-methyl, mesosulfuron-methyl, orthosulfamuron, flucetosulfuron, amidosulfuron, TH-547 of a compound disclosed in WO2005092104, a triazolopyrimidinsulfonamide type, such as flumetsulam, metosulam, 5 diclosulam, chloransulam-methyl, florasulam, metosulfam or penoxsulam, an imidazolinone type, imazatair imazapir, imazaxirim , imazamet, imazametabenz or imazapic, a type of pyrimidinylsalicylic acid, such as piritiobac-sodium, bispiribac-sodium, pyriminobac-methyl, piribenzoxim, pyriftalid or pyrimisulfan (KUH-021), a type of sulfonylaminocaronazooncarbonazonazolecarbonyl, such as others, such as glyphosate, glyphosate-ammonium, glyphosate-10 isopr opylamine, sulphate, glufosinate, glufosinate-ammonium and bilanafos.

(8) Those believed to have herbicidal effects by inhibiting plant cell mitosis, such as a dinitroaniline type, such as trifluralin, orizaline, nitraline, pendimethalin, etalfluralin, benfluralin or prodiamine, an amide type, such as bensulide, napronamide or pronamide, an organic phosphorus type, such as amiprofos-methyl, butamifós, anilofós or piperofós, a phenylcarbamate type, such as profam, chlorprofam or barbán, a cumilamina type, such as daimuron, cumiluron or bromobutide, and others such as asulam, dithiopir, thiazopir, cafenstrole and indanofan.

(9) Those believed to have herbicidal effects by inhibiting protein biosynthesis or lipid biosynthesis of plants, such as a chloroacetamide type, such as alachlor, metazachlor, butachlor, pretylachlor, metolachlor, S-metolachlor, tenylchlor , petoxamid, acetochlor, propachlor or propischlor, a carbamate type, such as molinate, dimepiperate or pyributicarb, and others, such as ethobenzanid, mefenacet, flufenacet, tridiphane, fentrazamide, oxaziclomephon, dimetenamide and benfuresate.

(10) A thiocarbamate type, such as EPTC, butylate, vernolate, pebulate, cycloate, prosulfocarb, esprocarb, thiobencarb, dialate or trialate and others, such as MSMA, DSMA, endotal, ethofumesate, sodium chlorate, pelargonic acid, phosamine, pinoxaden and HOK-201.

(11) Those believed to have herbicidal effects because they are parasites in plants, such as Xanthomonas campestris, Epicoccosurus nematosurus, Exserohilum monoseras and Drechsrela monoceras, 30

 The herbicidal composition of the present invention can be prepared by mixing compound A and compound B, as active ingredients, with various additives according to conventional formulation methods for agricultural chemicals, and applied in the form of various formulations, such as fine powders, granules , water dispersible granules, wetting powders, tablets, pills, capsules (including a formulation packaged with a water soluble film), water based suspensions, oil based suspensions, microemulsions, suspoemulsions, water soluble powders, concentrates emulsifiable, concentrated or soluble pastes. It can be formed with any formulation commonly used in this field, as long as the object of the present invention is thus fulfilled.

 At the time of formulation, compound A and compound B can be mixed together for formulation or can be formulated separately and mixed at the time of application.

 The additives to be used for the formulation include, for example, a solid support, such as diatomaceous earth, hydrated lime, calcium carbonate, talc, white carbon, kaolin, bentonite, a mixture of kaolin and sericite, clay, sodium carbonate, sodium bicarbonate, mirabilite, zeolite or starch; a solvent, such as water, toluene, xylene, naphtha solvent, dioxane, acetone, isophorone, methyl isobutyl ketone, chlorobenzene, cyclohexane, dimethyl sulfoxide, N, N-dimethylformamide, dimethylacetamide, N-methyl-2-pyrrolidone or a alcohol; an anionic surfactant, such as a fatty acid salt, a benzoate, a polycarboxylate, an alkyl sulfuric acid ester salt, an alkyl sulfate, an alkylaryl sulfate, an alkyl diglycol ether sulfate, an acid ester salt of sulfuric alcohol, an alkyl sulfonate, an alkylaryl sulfonate, an aryl sulfonate, a lignin sulfonate, an alkyldiphenyl ether disulphonate, a polystyrene sulfonate, an alkyl phosphoric acid ester salt, an alkylaryl phosphate, a styrylaryl phosphate, a polyoxyethylene alkyl ether salt of sulfuric acid ester, a polyoxyethylene alkylaryl ether sulfate, a polyoxyethylene alkylaryl ether salt of sulfuric acid, a polyoxyethylene alkyl phosphate phosphate ester, an ester salt of polyoxyethylene alkylaryl phosphoric acid, a polyoxyethylene aryl ether salt of the phosphoric acid ester, a formaldehyde condensed naphthalenesulfonic acid or a sulfonate of a alkylnaphthalene condensed with formaldehyde; a nonionic surfactant, such as a sorbitan fatty acid ester, a glycerin fatty acid ester, a fatty acid polyglyceride, a fatty acid alcohol polyglycol ether, acetylene glycol, acetylene alcohol, an oxyalkylene block polymer, a polyoxyethylene alkyl ether,

a polyoxyethylene alkylaryl ether, a polyoxyethylene styrylaryl ether, a polyoxyethylene glycol alkyl ether, polyethylene glycol, a polyoxyethylene fatty acid ester, a polyoxyethylene sorbitan fatty acid ester, a polyoxyethylene glyceryl or polyethylene hydroxygenated polyoxyethylene hydrogenated polyoxyethylene ether polyoxypropylene fatty acid ester; and a vegetable oil or mineral oil, such as olive oil, capoc oil, castor oil, palm oil, camellia oil, coconut oil, sesame oil, corn oil, rice bran oil, oil of peanut, cottonseed oil, soybean oil, rapeseed oil, linseed oil, tung oil or liquid paraffins. These additives can be suitably selected for use separately or in combination as a mixture of two or more, provided that the object of the present invention is fulfilled. In addition, additives other than those mentioned above can be suitably selected, for use among those known in this field. For example, different commonly used additives can be used, such as a filler, a thickener, an anti-settling agent, an antifreeze agent, a dispersion stabilizer, a protector, an anti-mold agent, a foaming agent, a disintegrant and a binder. The weight mixing ratio of the active ingredients for the different additives in the herbicidal composition of the present invention may be 0.001: 99.999 to 95: 5, preferably 0.005: 99.995 to 90:10. fifteen

 As a method for applying the herbicidal composition of the present invention, different methods can be employed and can be suitably selected for use, depending on various conditions, such as application sites, formulations, types of growth conditions of plants to be controlled. For example, the following methods can be mentioned. twenty

1. Compound A and compound B are mixed together to prepare a formulation that is applied as is.

2. Compound A and compound B are mixed together to prepare a formulation that is diluted to a predetermined concentration with, for example, water, and if necessary, various additives are added (a surfactant, a vegetable oil, an oil mineral, etc.), followed by application.

3. Compound A and compound B are formulated separately and applied as formulated.

4. Compound A and compound B are formulated separately and diluted respectively, to a predetermined concentration with, for example, water and if necessary, various additives are added (a surfactant, a vegetable oil, a mineral oil, etc.) followed by the application.

5. Compound A and compound B are formulated separately and then mixed at the time of dilution at predetermined concentrations with, for example, water, and if necessary, various additives are added (a surfactant, a vegetable oil, a mineral oil, etc.) followed by application. 35

 Some preferred embodiments of the present invention will now be exemplified.

(1) A herbicidal composition comprising 2- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfmoyl) -N, N-dimethylnicotinamide (hereinafter referred to simply as compound A-1) and N2-tert-butyl-6- chloro-N4-ethyl-1,3,5-triazin-2,4-diamine or (hereinafter referred to simply as compound B-1); and a method of controlling unwanted plants or inhibiting their growth, which comprises applying a herbicidally effective amount of said herbicidal composition, to unwanted plants or to a place where they grow.

(2) A method of controlling unwanted plants or inhibiting their growth, which comprises applying a herbicidally effective amount of compound A-1, and a herbicidally effective amount of compound B, to unwanted plants or to a place where they grow Four. Five

EXAMPLES

 Formulation examples for the herbicidal composition of the present invention will now be described.

FORMULATION EXAMPLE 1

 (one)

 Compound A-1 1 part by weight

 (2)

 Compound B B-1 20 parts by weight

 (3)

 Supragil MNS / 90 (sodium alkylnaphthalene sulfonate, condensed with formaldehyde) 3 parts by weight

 (4)

 NEWKALGEN BX-C (sodium dialkylnaphthalene sulfonate) 4 parts by weight

 (5)

 Diatomaceous earth 72 parts by weight

 The above respective components are mixed to obtain a wetting powder.

FORMULATION EXAMPLE 2

 (one)

 Compound A-1 1 part by weight

 (2)

 Compound B-1 40 parts by weight

 (3)

 Supragil MNS / 90 8 parts by weight

 (4)

 Geropon T / 36 (sodium polycarboxylate) 3 parts by weight

 (5)

 Kaolin 48 parts by weight

 5

 The above respective components are mixed, and then water was added, followed by kneading, extrusion granulation, drying and sieving to obtain water dispersible granules.

FORMULATION EXAMPLE 3

 (one)

 Compound A-1 0.3 parts by weight

 (2)

 Compound B-1 7.5 parts by weight

 (3)

 GERONOL VO / 278 (glycerol fatty acid ester) 10 parts by weight

 (4)

 Methyl ester of vegetable oil 80.2 parts by weight

 (5)

 New D Orben (bentonite-alkylamino complex) 2 parts by weight

 The above respective components are mixed uniformly and ground with a 10 Dyno mill to obtain a suspension.

Notes:

Supragil MNS / 90 and Geropon T / 36: trade names, manufactured by Rhodia Nicca, Ltd.

NEWKALGEN BX-C: trade name, manufactured by TAKEMOTO OIL AND FAT Co., Ltd.

GERONOL VO / 278: trade name, manufactured by Rhone-Poulenc 15

New D Orben: trade name, manufactured by Shiraishi Kogyo Kaisha, Ltd.

TEST EXAMPLE 1

Land from highland fields was placed in a 1 / 1,000,000 ha container and seeds from different plants were sown. Then, when the plants reached the prescribed foliation phases, ((1) 3.6 foliar phase of the digitria (Digitaria sanguinalis L.), and foliation phase (2) 2.8 of the Asian mallow (Abutilon theophrasti MEDIC.)), A prescribed amount of the herbicidal composition was diluted with water corresponding to 300 l / ha and foliar application was carried out by means of a small spray. On day 21 after application, the growth status of each plant was visually observed and the growth inhibition rate (%) was evaluated according to the following evaluation criteria (observed value) and growth inhibition rate (% ) calculated by the method of Colby 25 mentioned above (expected value), are shown in Tables 1 and 2.

Growth inhibition rate (%) = 0% (equivalent to untreated areas) to 100% (total death).

30

TABLE 1

 Compound

 Amount of application of the active ingredient (g / ha) Digitaria

 Growth inhibition rate (%)

 Observed

 Expected

 A-1

 25 53 -

 B-1

 250 5 -

 500

 8 -

 A-1 + B-1

 25 + 250 66 55

 25 + 500

 67 58

TABLE 2

 Compound

 Amount of application of the active ingredient (g / ha) Asian mallow

 Growth inhibition rate (%)

 Observed

 Expected

 A-1

 50 60 -

 B-1

 250 57 -

 500

 58 -

 A-1 + B-1

 50 + 250 88 83

 50 + 500

 100 83

TEST EXAMPLE 2 5

 Land from highland fields was placed in a 1 / 1,000,000 ha container and seeds of Asian mallow (Abutilon theophrasti MEDIC.) Were sown. Then, when the Asian mallow reached the foliation phase 2.9, a prescribed amount of the herbicidal composition was diluted with water, corresponding to 300 l / ha and foliar application was carried out by means of a small spray. 10

 On day 21 after application, the growth status of Asian mallow was visually observed and evaluated in the same manner as Test Example 1 above. The results are shown in Table 3

TABLE 3

 Compound

 Amount of application of the active ingredient (g / ha) Asian mallow

 Growth inhibition rate (%)

 Observed

 Expected

 A-1

 25 38 -

 B-1

 500 47 -

 A-1 + B-1

 25 + 500 70 67

 fifteen

TEST EXAMPLE 3

 Land from highland fields was placed in a 1 / 1,000,000 ha container and seeds of Asian mallow (Abutilon theophrasti MEDIC.) Were sown. Then, when the Asian mallow reached the

foliation phase 2.3 to 2.5, a prescribed amount of the herbicidal composition was diluted with water, corresponding to 300 l / ha and foliar application was carried out by means of a small spray.

 On day 14 after application, the growth status of the Asian mallow was visually observed and evaluated in the same manner as Test Example 1 above. The results are shown in Table 4

TABLE 4

 Compound

 Amount of application of the active ingredient (g / ha) Asian mallow

 Growth inhibition rate (%)

 Observed

 Expected

 A-1

 5 5 -

 10

 8 -

 fifteen

 12 -

 B-1

 1000 37 -

 1500

 43 -

 2000

 43 -

 A-1 + B-1

 5 + 1000 50 40

 5 + 1500

 53 46

 5 + 2000

 53 46

 10 + 1000

 55 42

 10 + 1500

 57 48

 10 + 2000

 60 48

 15 + 1000

 57 44

 15 + 1500

 58 50

 15 + 2000

 63 50

Claims (3)

1. A herbicidal composition containing (A) 2- (4,6-dimethoxypyrimidin-2-ylcarbamoylsulfamoyl) -N, N-dimethylnicotinamide or its salt and (B) N2-tert-butyl-6-chloro-N4-ethyl- 1,3,5-triazin-2,4-diamine or its salt, in which the mixing ratio of (A) and (B) is such that (B) is 0.5 to 1,000 parts by weight per 1 part by weight of (A). 5 2. A method of controlling unwanted plants or inhibiting their growth, which comprises applying a herbicidally effective amount of the herbicidal composition, as defined in claim 1, to unwanted plants or to a place where they grow. 3. A method of controlling unwanted plants or inhibiting their growth, which comprises applying a herbicidally effective amount of 1 to 200 g / ha of (A), as defined in claim 1, and a herbicidally effective amount of 100 at 5,000 g / ha of (B), as defined in claim 1, to unwanted plants or to a place where they grow.