JP2021075497A - Herbicide composition containing cyanazine and ethalfluralin - Google Patents

Abstract

To provide a herbicide composition that has a wide weeding spectrum, has high activity, and retains its effect for a long time.SOLUTION: A herbicide composition contains, as active ingredients, cyanazine represented by formula [I] and ethalfluralin represented by formula [II].SELECTED DRAWING: None

Description

The present invention relates to 2- (4-chloro-6-ethylamino-1,3,5-triazine-2-ylamino) -2-methylpropiononitrile (cyanazine) and N-ethyl-α, α, α-. The present invention relates to a herbicide composition containing trifluoro-N- (2-methylallyl) -2,6-dinitro-p-toluidine (etalflularin).

[I]

で示される２−（４−クロロ−６−エチルアミノ−１,３,５−トリアジン−２−イルアミノ）−２−メチルプロピオノニトリル、及び
式[II]、

[II]

で示されるＮ-エチル−α,α,α−トリフルオロ−Ｎ−（２−メチルアリル）−２,６−ジニトロ−ｐ−トルイジンは、それぞれ、畑作用、芝地用又は非農耕地用除草剤組成物としてすでに公知である。例えば、ＳＨＩＢＵＹＡ ＩＮＤＥＸ １７ｔｈ ＥｄｉｔｉｏＮ ２０１４（ＳＨＩＢＵＹＡ ＩＮＤＥＸ ＲＥＳＥＡＲＣＨ ＧＲＯＵＰ発行）を参照されたい。 Equation [I],

[I]

2- (4-Chloro-6-ethylamino-1,3,5-triazine-2-ylamino) -2-methylpropiononitrile represented by, and formula [II],

[II]

N-Ethyl-α, α, α-trifluoro-N- (2-methylallyl) -2,6-dinitro-p-toluidine indicated by is a herbicide for upland field, turf or non-agricultural land, respectively. It is already known as a composition. For example, refer to SHIBUYA INDEX 17th EditioN 2014 (published by SHIBUYA INDEX RESEARCH GROUP).

In recent years, environmental pollution caused by pesticides has become a problem, and there is a demand for a drug that exerts a high effect at a lower dose in order to reduce the environmental load. If a synergistic effect is obtained and the activity is improved by using a mixed agent, it is expected that the number of applications can be reduced and a plurality of weeds can be controlled at the same time by one application, leading to labor saving. On the other hand, in the field of herbicides, many herbicides are used for the purpose of weed control in upland crop cultivation areas, turflands or non-agricultural lands. Weeds that grow on upland fields, grasslands, or non-agricultural lands are diverse and grow over a long period of time. Therefore, as the ability of the herbicide used, a herbicide having a wide herbicide spectrum, suppressing the growth of weeds for a long period of time, and having high safety for crops or turf is desired.

[I]

で示される２−（４−クロロ−６−エチルアミノ−１,３,５−トリアジン−２−イルアミノ）−２−メチルプロピオノニトリルの殺草活性を増強することにより、種々雑草に対して低薬量で防除効果を発揮する除草剤組成物を提供することを課題とする。 The present invention has the formula [I],

[I]

Low against various weeds by enhancing the herbicidal activity of 2- (4-chloro-6-ethylamino-1,3,5-triazine-2-ylamino) -2-methylpropiononitrile represented by An object of the present invention is to provide a herbicide composition that exerts a control effect in a dosage.

[I]

で示される２−（４−クロロ−６−エチルアミノ−１,３,５−トリアジン−２−イルアミノ）−２−メチルプロピオノニトリルと、
式[II]、

[II]

で示されるＮ-エチル−α,α,α−トリフルオロ−Ｎ−（２−メチルアリル）−２,６−ジニトロ−ｐ−トルイジンと、
を混合することにより、２−（４−クロロ−６−エチルアミノ−１,３,５−トリアジン−２−イルアミノ）−２−メチルプロピオノニトリル単独又はＮ-エチル−α,α,α−トリフルオロ−Ｎ−（２−メチルアリル）−２,６−ジニトロ−ｐ−トルイジン単独では十分な効果を得ることができない低薬量で、雑草に対して高い活性を示すことを発見した。
すなわち、本発明は、下記〔１〕〜〔６〕の発明に関するものである。 As a result of diligent studies to solve the above problems, the present inventors have determined the formula [I],

[I]

2- (4-Chloro-6-ethylamino-1,3,5-triazine-2-ylamino) -2-methylpropiononitrile represented by
Equation [II],

[II]

N-Ethyl-α, α, α-trifluoro-N- (2-methylallyl) -2,6-dinitro-p-toluidine, indicated by
2- (4-Chloro-6-ethylamino-1,3,5-triazine-2-ylamino) -2-methylpropiononitrile alone or N-ethyl-α, α, α-tri It was discovered that fluoro-N- (2-methylallyl) -2,6-dinitro-p-toluidine alone exhibits high activity against weeds at a low dose that cannot be sufficiently effective.
That is, the present invention relates to the following inventions [1] to [6].

[I]

で示される２−（４−クロロ−６−エチルアミノ−１,３,５−トリアジン−２−イルアミノ）−２−メチルプロピオノニトリルと、
（Ｂ）式[II]、

[II]

で示されるＮ-エチル−α,α,α−トリフルオロ−Ｎ−（２−メチルアリル）−２,６−ジニトロ−ｐ−トルイジンと、
を含有する除草剤組成物。
〔２〕成分（Ａ）と成分（Ｂ）との質量比が０．１：５０〜５０：０．１である、前記〔１〕に記載の除草剤組成物。
〔３〕増量剤及び／又は界面活性剤を更に含む、前記〔１〕〜〔２〕のいずれか１つに記載の除草剤組成物。
〔４〕雑草を防除するための、前記〔１〕〜〔３〕のいずれか１つに記載の除草剤組成物の使用。
〔５〕雑草及び／又はそれらの生息環境に前記〔１〕〜〔３〕のいずれか１つに記載の除草剤組成物を処理することを特徴とする、雑草を防除する方法。
〔６〕有用作物を生育させようとする場所、生育させている場所、又は生育している作物に前記〔１〕〜〔３〕のいずれか１つに記載の除草剤組成物を処理することを特徴とする、雑草を防除する方法。 [1] Equation (A) [I],

[I]

2- (4-Chloro-6-ethylamino-1,3,5-triazine-2-ylamino) -2-methylpropiononitrile represented by
Equation (B) [II],

[II]

N-Ethyl-α, α, α-trifluoro-N- (2-methylallyl) -2,6-dinitro-p-toluidine, indicated by
A herbicide composition containing.
[2] The herbicide composition according to the above [1], wherein the mass ratio of the component (A) to the component (B) is 0.1: 50 to 50: 0.1.
[3] The herbicide composition according to any one of [1] to [2] above, further comprising a bulking agent and / or a surfactant.
[4] Use of the herbicide composition according to any one of the above [1] to [3] for controlling weeds.
[5] A method for controlling weeds, which comprises treating weeds and / or their habitat with the herbicide composition according to any one of the above [1] to [3].
[6] Treating a place where a useful crop is to be grown, a place where the crop is being grown, or a growing crop with the herbicide composition according to any one of the above [1] to [3]. A method of controlling weeds, which is characterized by.

[I]

で示される２−（４−クロロ−６−エチルアミノ−１,３,５−トリアジン−２−イルアミノ）−２−メチルプロピオノニトリルの殺草活性を増強し、種々雑草に対して低薬量で防除効果を発揮する除草剤組成物を提供することができる。 According to the present invention, the formula [I],

[I]

Enhances the herbicidal activity of 2- (4-chloro-6-ethylamino-1,3,5-triazine-2-ylamino) -2-methylpropiononitrile shown by It is possible to provide a herbicide composition that exerts a control effect in the above.

[I]

で示される２−（４−クロロ−６−エチルアミノ−１,３,５−トリアジン−２−イルアミノ）−２−メチルプロピオノニトリルは、一般名：シアナジンとして公知の化合物であり、公知の製造法によって合成、あるいは既製造業者から入手することができる。 Formula (A) used in the present invention,

[I]

2- (4-Chloro-6-ethylamino-1,3,5-triazine-2-ylamino) -2-methylpropiononitrile represented by is a compound known as cyanazine, which is a known production. It can be synthesized by method or obtained from an off-the-shelf manufacturer.

［II］

で示されるＮ-エチル−α,α,α−トリフルオロ−Ｎ−（２−メチルアリル）−２,６−ジニトロ−ｐ−トルイジンは、一般名：エタルフルラリンとして公知の化合物であり、公知の製造法によって合成、あるいは既製造業者から入手することができる。 Equation (B) [II], used in the present invention.

[II]

N-Ethyl-α, α, α-trifluoro-N- (2-methylallyl) -2,6-dinitro-p-toluidine represented by is a compound known under the generic name: ethalflularin, and is known. It can be synthesized by a manufacturing method or obtained from an off-the-shelf manufacturer.

The mass ratio of (A) and (B), which are the active ingredients of the herbicide composition of the present invention, is 0.1: 99 to 99: 0.1, preferably 0.1: 80 to 80: 0.1. , More preferably 0.1:50 to 50: 0.1.

The herbicide composition provided by the present invention can be used for the prevention and extermination of weeds that are harmful in situations such as agriculture, indoors, forests, people, livestock and hygiene. Specific usage situations, target weeds, and usage methods are shown below, but the scope of the present invention is not limited to these matters.

The herbicide composition of the present invention comprises agricultural crops such as edible crops (wheat such as rice, barley, wheat, rye, oat, potatoes such as horse bells, sweet potatoes, satoimo, and yamanoimo, soybeans, small beans, and soybeans. , Endo beans, green beans, beans such as peanuts, corn, millet, buckwheat, etc.), vegetables (cabbage, white vegetables, radish, buds, broccoli, potash flowers, komatsuna and other Abrana crops, pumpkin, cucumber, squid, makuwa Uri family crops such as uri, melon, zucchini, yugao, nigari, eggplant family crops such as eggplant, tomato, pepper, sardine, and sardine, blue sardine crops such as okura, red sardine crops such as spinach, and carrot. , Mitsuba, parsley, celluri, udo and other crops, lettuce, gobo and other crops, garlic, onions, onions, nira, rakkyo and other onions, asparagus, shiso, bricks, etc.),

Mushrooms (shitake, mushrooms, etc.), fruit trees / fruits (citrus, apple, pear, peach, plum, cherry peach, li, apricot, grape, persimmon, 枇杷, flowerless fruit, akebi, blueberry, raspberry, pineapple, mango, kiwi fruit , Bananas, strawberries, olives, walnuts, chestnuts, almonds, etc.), fragrances and other ornamental crops (lavender, rosemary, thyme, sage, pepper, ginger, etc.), special crops (tobacco, tea, grass, sugar cane, rush, etc.) Sesame, konjac, hops, cotton, hemp, olives, rubber, coffee, rapeseed, sunflowers, mulberry, etc.), grass and feed crops (grass, corn, sorghum, orchardgrass, etc. Gramineae grasses, etc.), turf (Koryo turf, bentgrass, etc.), forest trees (todomatsu, ezomatsu, pine, hiba, cedar, 桧, etc.) and ornamental plants (kiku, rose, carnation, lily, Turkish ginkgo, etc.) It can also be used to control weeds that damage grasses and flowers such as grasses, grasses, orchids, and garden trees such as ginkgo, cherry blossoms, and aoki. Specific weeds are shown below.

Examples of annual grass weeds include crabgrass (Digitaria ciliaris), inubier (Echinochloa crus-galli var. Cruss-galli), goosegrass (Digitaria violascens), and setaria faberi (Setaria faberi). Perennial weeds such as Setaria viridis, Setaria faberi (Alopecurus aequalis var. Amurensis), etc. include, for example, goosegrass (Elytrigia repens), Chigaya (Imperata cylin), etc.
Examples of annual weeds of Cyperaceae weeds include Cyperus microiria and Cyperus iria, and perennial weeds include, but are not limited to, nutsedge (Cyperus rotundus) and the like. ..

The annual weeds broadleaf weeds, for example, black nightshade (Solanum nigrum), dayflower (Commelina communis), knotweed (Persicaria longiseta), Ooinutade (Persicaria lapathifolia var. Lapathifolia), Amaranthus lividus (Amaranthus blitum), Amaranthus viridis (Amaranthus viridis), Enokigusa (Acalypha australis), fleabane (Erigeron annuus), shepherd's purse (Capsella bursa-pastoris), Gnaphalium affine (Pseudognaphalium affine), Erigeron canadensis (Conyza canadensis), common lambsquarters (Chenopodium album), Stellaria media (Stellaria media), persian speedwell (Veronica persica), clover (Sagina japonica), Tanisoba (persicaria nepalensis), elsholtzia ciliata (Elsholtzia ciliata), wild buckwheat (Fallopia convolvulus), spergula arvensis (Spergula arvensis var.sativa), Rorippa palustris (Rorippa palustris), purslane (Portulaca oleracea), Zakurosou (Mollugo stricta) , Hotokenoza (Lamium amplexicaule), Nishikisou (Euphorbia humifusa), Konishikisou (Euphorbia maculata), Urikusa (Lindernia crustacea), etc.

Perennial weeds include, for example, sugina (Equisetum arvense), halzion (Erigeron filadelphicus), bindweed (Rumex japonicus), bindweed (Plantago asiatica), bindweed (Artemisia montana), and wormwood (Artemisia montana). aquilinum), Hachijouna (Sonchus brachyotus), Pinellia ternata (Pinellia ternata), Ezo Roh fox thistle (Cirsium setosum), sorrel (Rumex acetosa), Otokoyomogi (Artemisia japonica), broadleaf dock (Rumex obtusifolius), Iwaninaga (Ixeris stolonifera) class, Ooyomogi ( Artemisia montana), Rorippa sylvestris (Rorippa Sylvestris), Kohirugao (Calystegia hederacea), purple oxalis (Oxalis debilis subsp.corymbosa), morning glory (Calystegia pubescens), Chidomegusa (Hydrocotyle sibthorpioides), oxalis (Oxalis corniculata) class, Houttuynia (Houttuynia cordata ), Bindweed (Caylatia japonica), Warnasubi (Solanum carolinense) and the like, but are not limited thereto.

The herbicide composition of the present invention is particularly valuable in controlling or preventing weeds that damage crops, natural forests, planted forests, trees in urban green spaces, ornamental plants, and the like. In such situations, the herbicidal compositions of the present invention may contain other active compounds, such as pesticides, fungicides, synergists, in their commercially useful formulations and in the forms of use prepared by those formulations. It may be mixed with an agent, a plant regulator and the like.

The herbicide composition of the present invention can be taken as it is or as a pesticide in general, for example, a wettable powder, a granule wettable powder, a dry flowable agent, a water solvent, an emulsion, a liquid agent, an oil agent, an aqueous suspension agent / aqueous agent. It can be used in flowable agents such as emulsions, capsules, and dosage forms such as powders, granules, fine granules, baits, tablets, sprays, fuming agents, and aerosols. For the preparation of these dosage forms, a preparation method known in the technical field of agricultural and horticultural chemicals can be used. In these preparations, the total amount of the active ingredient compound is usually 0.1 to 99.9% by mass, preferably 0.2 to 80% by mass. Further, in order to obtain these dosage forms, various pesticide supplements conventionally used in the technical field of agricultural and horticultural chemicals can be appropriately used. Such pesticide aids can be used, for example, for the purpose of improving the effect of agricultural and horticultural chemicals, stabilizing them, and improving their dispersibility. Examples of the pesticide auxiliary agent include a carrier (diluent), an emulsifier, a wettable powder, a dispersant, a disintegrant, and the like.

Examples of the liquid carrier include water, aromatic hydrocarbons such as toluene and xylene, alcohols such as methanol, butanol and glycol, ketones such as acetone, amides such as dimethylformamide, and sulfoxides such as dimethyl sulfoxide. Examples thereof include methylnaphthalene, cyclohexane, animal and vegetable oils, fatty acids and the like. Further, as the solid carrier, for example, clay, kaolin, talc, diatomaceous earth, silica, calcium carbonate, montmorillonite, bentonite, feldspar, quartz, alumina, sawdust, nitrocellulose, starch, arabic rubber and the like can be used.

As the emulsifier and dispersant, ordinary surfactants can be used. For example, anionic surfactants such as higher alcohol sodium sulfate, stearyltrimethylammonium chloride, polyoxyethylene alkylphenyl ether, and lauryl betaine. , Cationic surfactants, nonionic surfactants, amphoteric surfactants and the like can be used.
Further, a wettable powder such as dialkyl sulfosuccinate and sodium lauryl sulfate, a fixing agent such as carboxymethyl cellulose and polyvinyl alcohol, and a dispersant such as sodium lignin sulfonate and sodium polycarboxylic acid can be used.
To control weeds, in addition to spraying the herbicide composition on the soil surface, where damage is usually caused or may be caused by weeds, plant foliage is sprayed. , Various spraying forms such as irrigation and flooding can be selected.

When used, it varies depending on the type of weed, its amount, the type of target crop / tree, cultivation form / growth condition, etc., but generally ^{the total amount of active ingredient per 1000 m 2} is 0.1 to 1000 g, preferably 0.1 to 1000 g. Apply 1-100g. In this case, wettable powders, granule wettable powders, aqueous solvents, emulsions, liquids, flowable agents such as aqueous suspensions and aqueous emulsions, capsules, etc. are diluted with water to determine the type of plant to be targeted. Although it depends on the cultivation form and growing condition, it is generally sufficient to spray at a dose of 100 liters per ^{1000 m 2.} Further, in the case of a powder, a spray, or an aerosol, it may be treated in the state of the preparation.

[Formulation example]
Hereinafter, the present invention will be described in more detail with reference to Examples, but the scope of the present invention is not limited to these Examples.

Pharmaceutical example 1
Cyanazine (12.5 parts) and etalflularin (17.5 parts), N-methyl-2-pyrrolidone (reagent) (10 parts), xylene (reagent) (50 parts), and Neucargen D-230 (50 parts). Polyoxyethylene castor oil (Takemoto Oil & Fat Co., Ltd.) (10 parts) was uniformly mixed and dissolved to obtain an emulsion.

Pharmaceutical example 2
Cyanazine (12.5 parts) and etalflularin (8.9 parts), N-methyl-2-pyrrolidone (reagent) (10 parts), xylene (reagent) (58.6 parts), and Neucalgen D- 230 (polyoxyethylene castor oil, Takemoto Oil & Fat Co., Ltd.) (10 parts) was uniformly mixed and dissolved to obtain an emulsion.

Pharmaceutical example 3
Cyanazine (10 parts) and etalflularin (20 parts), Solpol 7948 (Polyoxyalkylene Tristyrylphenyl Ether Sodium Sulfate, Toho Chemical Industry Co., Ltd.) (5 parts), Propylene Glycol (Reagent) (10 parts), and Water (30 parts) was mixed and wet pulverized with a bead mill to obtain a slurry. Next, KELZAN (xanthan gum, Sansho Co., Ltd.) (0.2 parts) was well mixed and dispersed in water (24.8 parts) to prepare a gel-like product, which was thoroughly mixed with the pulverized slurry to prepare a flowable agent. Obtained.

Pharmaceutical example 4
Cyanazine (1st part) and etalflularin (2nd part), Airroll CT-1L (sodium dioctyl sulfosuccinate, Toho Chemical Industry Co., Ltd.) (2nd part), Bentonite Sado (Bentonite, Kunimine Kogyo Co., Ltd.) (30 parts) , And NK-300 (Clay, Showa KDE Co., Ltd.) (65 parts) were uniformly mixed, water was added and kneaded well, and then extruded granulation was performed and dried granulation was performed to obtain granules.

Pharmaceutical example 5
Cianadin (15 parts) and etalflularin (15 parts), Toxile GU-N (white carbon, Oriental Silicon Corporation) (20 parts), Solpol 5096 (polyoxyethylene styrylphenyl ether sulfate, Toho Chemical Industry Co., Ltd.) ( 10 parts) and SS clay (clay, Showa KDE Co., Ltd.) (40 parts) were mixed and then pulverized using a fine pulverizer to obtain a wettable powder.

[Weed Control Test Examples] The weed control test examples will be described below, but the scope of the present invention is not limited to these test examples.

Test Example 1: Herbicidal effect test on barnyard grass Seeds of dormant and awakened barnyard grass were sown in a Wagner pot with a size of 1/10000 ares. The chemical treatment was performed before the outbreak of weeds. The amount of the active ingredient was prepared according to Formulation Example 1, the prescribed amount of the produced drug was diluted, adjusted to the predetermined concentration, and then the drug solution was sprayed on the Wagner pot in an amount equivalent to 100 ml / 10a using an automatic drug solution sprayer. .. The weed control effect was investigated one month after the drug treatment. The survey method was carried out by measuring the amount of residual grass (g: weight of fresh grass) and calculating the rate of grass suppression (%) in comparison with the amount of residual grass (g) in the untreated plot using the formula (1) shown below. .. The test was repeated 4 times.

Formula (1) Weed control rate (%) = (1-treated plot residual grass weight (g) / untreated plot residual grass weight (g)) x 100

Using the obtained herbicide rate, the presence or absence of a synergistic effect was tested based on the following Colby's formula (Calculating Synergistic And Antagonist Responses Of Herbicide Combination, Weed 15, pp20-22, 1967).

E = A + B-A x B / 100

Here, E represents the expected value of the weed control rate, A represents the weed control rate of the compound A alone treatment, and B represents the weed control rate of the compound B alone treatment. When the herbicidal rate (experimental value) obtained in an actual experiment is higher than the expected value (E) of the weed control rate calculated by the Colby formula, the herbicide composition of the present invention has a synergistic effect on weed control. Will have. The results are shown in Table 1.

Table 1

From the results in Table 1, in the effect test in which the herbicide composition of the present invention was tested, the herbicidal rate obtained from the test exceeded the expected value calculated by the above-mentioned Colby's formula, and showed a synergistic effect. I understand.

Test Example 2: Test of herbicidal effect on white goosefoot The seeds of dormant and awakened white goosefoot were sown in a Wagner pot having a size of 1/10000 ares. The chemical treatment was performed before the outbreak of weeds. The amount of the active ingredient was prepared according to Formulation Example 1, the prescribed amount of the produced drug was diluted, adjusted to the predetermined concentration, and then the drug solution was sprayed on the Wagner pot in an amount equivalent to 100 ml / 10a using an automatic drug solution sprayer. .. The weed control effect was investigated one month after the drug treatment. The survey method is to measure the amount of residual grass (g: weight of fresh grass) and calculate the rate of weed control (%) by comparing it with the amount of residual grass (g) in the untreated plot using the formula (1) described in Test Example 1. Went by. The test was repeated 4 times.
Using the obtained weed control rate, the presence or absence of a synergistic effect was tested based on the Colby formula described in Test Example 1. The results are shown in Table 2.

Table 2

From the results in Table 2, in the effect test in which the herbicide composition of the present invention was tested, the herbicidal rate obtained from the test exceeded the expected value calculated by the above Colby's formula, and it was found that a synergistic effect was exhibited. I understand.

Test Example 3: Test of herbicidal effect on nightshade The seeds of dormant and awakened nightshade were sown in a Wagner pot having a size of 1/10000 ares. The chemical treatment was performed before the outbreak of weeds. The amount of the active ingredient was prepared according to Formulation Example 2, the prescribed amount of the produced drug was diluted, adjusted to the predetermined concentration, and then the drug solution was sprayed on the Wagner pot in an amount equivalent to 100 ml / 10a using an automatic drug solution sprayer. .. The weed control effect was investigated one month after the drug treatment. The survey method is to measure the amount of residual grass (g: weight of fresh grass) and calculate the rate of weed control (%) by comparing it with the amount of residual grass (g) in the untreated plot using the formula (1) described in Test Example 1. Went by. The test was repeated 4 times.
Using the obtained weed control rate, the presence or absence of a synergistic effect was tested based on the Colby formula described in Test Example 1. The results are shown in Table 3.

Table 3

From the results in Table 3, in the effect test in which the herbicide composition of the present invention was tested, the herbicidal rate obtained from the test exceeded the expected value calculated by the above Colby's formula, and it was found that a synergistic effect was exhibited. I understand.

Test Example 4: Herbicidal effect test on Cyperus iria The seeds of Cyperus iria that had been dormant and awakened were sown in a Wagner pot with a size of 1/10000 ares. The chemical treatment was performed before the outbreak of weeds. The amount of the active ingredient was prepared according to Formulation Example 2, the prescribed amount of the produced drug was diluted, adjusted to the predetermined concentration, and then the drug solution was sprayed on the Wagner pot in an amount equivalent to 100 ml / 10a using an automatic drug solution sprayer. .. The weed control effect was investigated one month after the drug treatment. The survey method is to measure the amount of residual grass (g: weight of fresh grass) and calculate the rate of grass suppression (%) in comparison with the amount of residual grass (g) in the untreated plot by the mathematical formula (1) described in Test Example 1. Was done by. The test was repeated 4 times.
Using the obtained weed control rate, the presence or absence of a synergistic effect was tested based on the Colby formula described in Test Example 1. The results are shown in Table 4.

Table 4

From the results in Table 4, in the effect test in which the herbicide composition of the present invention was tested, the herbicidal rate obtained from the test exceeded the expected value calculated by the above Colby's formula, and it was found that a synergistic effect was exhibited. Do you get it.

The herbicide composition of the present invention shows a synergistic effect by using two components in combination, and has a broad herbicidal spectrum for various weeds as compared with the application of each component and a single agent. Since it shows an excellent control effect at a low dose, it reduces the number of times the herbicide is sprayed, has a small burden on the global environment, and is useful as an agricultural and horticultural agent.

Claims (6)

Equation (A) [I],

[I]
2- (4-Chloro-6-ethylamino-1,3,5-triazine-2-ylamino) -2-methylpropiononitrile represented by
Equation (B) [II],

[II]
N-Ethyl-α, α, α-trifluoro-N- (2-methylallyl) -2,6-dinitro-p-toluidine, indicated by
A herbicide composition comprising. The herbicide composition according to claim 1, wherein the mass ratio of the component (A) to the component (B) is 0.1: 50 to 50: 0.1. The herbicide composition according to claim 1, further comprising a bulking agent and / or a surfactant. Use of the herbicide composition according to any one of claims 1 to 3 for controlling weeds. A method for controlling weeds, which comprises treating weeds and / or their habitat with the herbicide composition according to any one of claims 1 to 3. A weed, which comprises treating a place where a useful crop is to be grown, a place where the crop is grown, or a growing crop with the herbicide composition according to any one of claims 1 to 3. How to control.