JPH0672808A - Anti-antagonist for herbicide, herbicide composition and herbicidal method - Google Patents

Abstract

(57) [Summary] [Structure] Antagonist for herbicides, which consists of hydrophilic polymer compound containing quaternary ammonium salt, and prevents antagonistic effect in combination with herbicide for foliage weeds and herbicide for broadleaf weeds. An herbicide for fine-leaf weeds and a herbicide for broad-leaf weeds, and a herbicidal composition containing the above-mentioned herbicide antagonistic inhibitor, and a herbicidal method using these three agents in combination Is. [Effect] By using the herbicidal antagonistic inhibitor of the present invention and the herbicidal composition of the present invention, and by the herbicidal method of the present invention, a combination of a herbicide for fine-leaf weeds and a herbicide for broad-leaf weeds is used. It is possible to prevent antagonism in advance, and
Since it is not necessary to increase the amount of each of auxiliary agents, carriers and herbicides with a small amount of labor, the risk of chemical damage is reduced, efficient weeding is possible, and the risk of environmental pollution is also reduced. It

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a herbicide anti-antagonist which prevents the herbicides for fine-leaf weeds and the herbicide for broad-leaf weeds from being used together, and an anti-antagonist for the herbicide, The present invention relates to a herbicide for fine-leaf weeds and a herbicide composition containing a herbicide for broad-leaf weeds, and a herbicidal method using these three agents.

Fine leaf weeds are used for simultaneously killing and weeding thin leaf weeds and broad leaf weeds that occur in the natural world including agricultural land such as fields and paddy fields, gardens, non-arable land such as railroads and riverbeds. From the viewpoint of labor saving, it is preferable to apply the herbicide for herbicide and the herbicide for broad-leaved weeds at the same time, but when both of them are applied at the same time, the interaction between the two causes the weeding of the two or one of them. It is widely known that so-called antagonism, which reduces the action or herbicidal action (hereinafter sometimes collectively referred to as herbicidal action), is caused. In the competition by using both of these,
It is also widely known that the herbicidal action of a herbicide for fine leaf weeds is remarkably reduced by the combined use of a herbicide for broadleaf weeds.

As a first measure for solving such a problem, each of the herbicide for fine-leaf weeds and the herbicide for broad-leaf weeds is applied individually at least twice with an interval of several days, and the fine leaves are applied. Weeds and broadleaf weeds are separately weeded. As a second measure, when the both are mixed and the mixture is applied once, the herbicide application rate which compensates for the herbicidal action reduced by antagonism-especially the application rate of the herbicide for fine-leaf weeds- The method of increasing the amount is adopted.

[0004]

However, among these countermeasures, the former requires at least two applications, and therefore the labor, auxiliary agents such as spreader and The disadvantage is that the amount of carrier such as water has to be increased. On the other hand, in the latter case, it is possible to save labor because the application is required only once, but on the other hand, the application amount of the herbicide-particularly the herbicide for fine-leaf weeds-is increased by compensating for the herbicidal action which is reduced by antagonism. There is a drawback that this increase in application rate increases the risk of causing phytotoxicity to useful crops. Therefore, if a drug capable of preventing antagonism caused by using a herbicide for fine-leaf weeds and a herbicide for broad-leaf weeds is developed, it overcomes the drawbacks in the above-mentioned conventional application methods, and It is not necessary to increase the amounts of auxiliary agents, carriers, and herbicides with a small amount of labor, and the risk of phytotoxicity is reduced, allowing efficient weeding and increasing the dose of herbicides. Since it is not necessary, the risk of adversely affecting the environment can be reduced.

The present inventors have earnestly studied to develop a drug capable of preventing the antagonism caused by the combined use of a herbicide for fine-leaf weeds and a herbicide for broad-leaf weeds. Based on this finding, the inventors arrived at the present invention by discovering that the antagonist can be prevented by using a hydrophilic polymer compound containing a specific quaternary ammonium salt from a substance.

[0006]

[Means for Solving the Problems] That is, the present invention comprises a hydrophilic polymer compound containing a quaternary ammonium salt, and antagonizes the combined use of a herbicide for fine-leaf weeds and a herbicide for broad-leaf weeds. And a quaternary ammonium salt for preventing antagonism when used in combination with both herbicides for fine-leaf weeds and broad-leaved weeds, and a herbicide for herbicides. A herbicidal composition comprising an antagonistic inhibitor for herbicides, which comprises a hydrophilic high-molecular compound containing the above, and a herbicidal method using these three agents.

The hydrophilic polymer compound containing a quaternary ammonium salt (hereinafter sometimes referred to as a quaternary ammonium salt-containing polymer compound), which is an active ingredient of the herbicidal antagonistic inhibitor of the present invention, is Average molecular weight 1,000 to 1,0
And is composed of a quaternary ammonium salt group-containing monomer and a quaternary ammonium salt group-free monomer, and a quaternary ammonium salt group-containing monomer: a quaternary ammonium salt group-free monomer; Is a polymer compound having a ratio of 5:95 to 100: 0. The number average molecular weight of the quaternary ammonium salt-containing polymer compound is a value measured by aqueous gel permeation chromatography using polyethylene glycol as a standard substance. The number-average molecular weight of the quaternary ammonium salt-containing polymer compound is determined based on the types of active ingredients (compounds that are active substances) of the herbicides for fine-leaf weeds and the herbicides for broad-leaved weeds, the types and properties of auxiliary agents. It depends on the concentration and is appropriately selected from the above range.

The quaternary ammonium salt-containing polymer compound must be hydrophilic, but the greater the hydrophilicity, the more preferable. Therefore, the hydrophilicity of the quaternary ammonium salt-containing polymer compound is expressed as a partition coefficient (logPOW) measured by a method using water / octanol. Therefore, the degree of hydrophilicity of the quaternary ammonium salt-containing polymer compound in the present invention is, as a partition coefficient, practically usually −2 or more, preferably −2 to +2, and particularly preferably −. It is 1.7 to +1.5. Further, the hydrophilic quaternary ammonium salt-containing polymer compound naturally includes a so-called water-soluble quaternary ammonium salt-containing polymer compound.

The quaternary ammonium salt-containing polymer compound is preferably a compound represented by the following general formula.

[0010]

[Chemical 2]

[Wherein A represents a group having an anion or a halogen atom, X represents a hydrogen atom or a methyl group, Y represents a hydroxyl group, -NH ₂ , -NHCH ₂ NH ₂ ,-,
_{NHCH 2 CH 2 NH 2, -NHCH} 2 CH 2 CH 2 NH 2,
_{-OCH 2 NH 2, -OCH 2 CH2NH} 2, -OCH 2 CH
_{2 CH 2 NH 2, -N (} CH 3) 2, -NHCH 2 N (CH 3) 2,
_{-NHCH 2 CH 2 N (CH 3} ) 2, -NHCH 2 CH 2 CH 2
_{N (CH 3) 2, -OCH} 2 N (CH 3) 2, -OCH 2 CH 2 N
(CH _{3) 2} or _{-OCH 2 CH 2 CH 2 N (} CH 3) shows a _2. The L: M ratio is 5:95 to 100-0, and preferably 70:30 to 30:70. ]

The monomer containing a quaternary ammonium salt group and the monomer not containing a quaternary ammonium salt group that constitute the quaternary ammonium salt-containing polymer compound are
For example, it is appropriately selected corresponding to the desired quaternary ammonium salt-containing polymer compound represented by the above general formula.
Typical examples of the monomer containing the quaternary ammonium salt group are 1,1-dimethyl-3,4-dimethylene-pyrrolidinium and 1,1-dimethyl-3,4-dimethylene having counter ions of fluorine, chlorine and bromine. -Pyrrolidinium and the like, preferably 1, with chlorine as a counter ion,
It is a 1-dimethyl-3,4-dimethylene-pyrrolidinium monomer. Representative examples of this quaternary ammonium base-free monomer are acrylic acid and methacrylic acid, and derivatives of these acids, among which acrylic acid amide. L: M ratio of 5:95 to 100
When it is out of the range of 0, the antagonistic action is lowered, and this quaternary ammonium salt-containing polymer compound may not be suitable for practical use as an antiantagonist for herbicides.

The amount of the quaternary ammonium salt-containing polymer compound used as the anti-antagonistic agent for herbicides of the present invention varies depending on the type of each herbicide and the type of weed. Generally, the herbicide for fine-leaf weeds is used. And 0.01 to 5% by weight, preferably 0.05 to 0.5% by weight, based on the application liquid which is a diluted liquid of the herbicide for broadleaf weeds. However, when the above-mentioned ratios are used with respect to the amounts of both herbicides, the application rate of the anti-antagonistic agent for herbicides of the present invention varies depending on the dilution ratio of the herbicide.
25-1500g per 0a, preferably 50-50
It is about 0g.

The herbicidal antagonistic inhibitor of the present invention is mixed in advance with a herbicide for fine leaf weeds and a herbicide for broadleaf weeds, and if desired, an auxiliary agent (adjuvant) such as a surfactant or a spreading agent, It is formulated as a herbicide and used as a thickener. The dosage form at this time is a usual dosage form in which the herbicide is formulated, for example, emulsion, flowable, wettable powder, granule, powder, granular wettable powder (WDG), solution, EW and microemulsion. It can be either an agent or the like. Many of these preparations are generally diluted with water before use.

As the adjuvant, anionic surfactants, cationic surfactants, nonionic surfactants and amphoteric surfactants, fatty acids and their derivatives, animal oils, vegetable oils, mineral oils and liquid fertilizers are preferably used and practically used. Up,
More preferably, nonionic and amphoteric surfactants, fatty acids and their derivatives, mineral oils and liquid fertilizers are used. The adjuvant, as described above,
In addition to the anti-antagonistic agent for herbicides of the present invention and the fine-leaf herbicide and the broad-leaved herbicide, which can be used by formulating as a thickener like a normal herbicide, in addition to the above,
The adjuvant can be used by mixing it immediately before the application of the herbicide and the anti-antagonist for the herbicide without containing it in the preparation in advance, or it can be used without premixing the herbicide and the antagonist for the herbicide. It can also be applied separately when applying the inhibitor.

By using the above-mentioned adjuvant together with the herbicidal antagonistic inhibitor of the present invention, it is possible to further improve the antagonistic action against the antagonistic action in the combined use of the fine-leaf herbicide and the broad-leaved herbicide. The amount of the adjuvant used in combination with the anti-antagonistic agent for herbicides is 0.01 to 5% by weight, preferably 0.5 to 3% by weight, based on the applied solution.

The anionic surfactant, cationic surfactant, nonionic surfactant and amphoteric surfactant are preferably water-soluble. Further, these surfactants can be used alone or mixed with each other.
The anionic surfactant used as an adjuvant in the present invention may be, for example, a compound represented by the general formula —COOX, —OSO _{3
X, -SO 3 X, -OPO 3} X 2 and (-O) ₂ PO ₂ X
(However, in the formula, X represents sodium, potassium, ammonium, monoethanolamine, diethanolamine or triethanolamine), and those containing a hydrophilic group are preferable.

The cationic surfactant used as an adjuvant in the present invention is, for example, a primary fatty amine salt,
Secondary fatty amine salt and tertiary fatty amine salt, quaternary ammonium salt, trialkylbenzylammonium salt, alkylpyridinium salt, 2-alkyl-1-alkyl-
1-Hydroxyethylimidazolinium salt, N, N-dialkylmorpholinium salt, polyethylene polyamino fatty acid amide salt, salt of polyethylene polyamino fatty acid amide urea condensate, and quaternary ammonium salt of polyethylene polyamino fatty acid amide urea condensate and so on.
In addition, chlorine and bromine as well as CH ₃ COO-, C ₂ H ₅ COO- and C ₃ H ₇ as atoms or groups constituting the salt.
COO- and the like are mentioned, and chlorine is most preferable.

As the nonionic surfactant used as an adjuvant in the present invention, for example, hydrophilic materials such as ethylene oxide, polyethylene glycol, glycerin, pentaerythritol, solibit, sorbitan, sugar and sucrose are used. Is something
For example, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene polystyryl phenyl ether, polyoxyethylene-polyoxypropylene glycol, polyoxyethylene-polyoxypropylene alkyl ether, polyhydric alcohol fatty acid partial ester, poly Examples include oxyethylene polyhydric alcohol fatty acid partial ester, polyoxyethylene fatty acid ester, polyglycerin fatty acid ester, polyoxyethylenated castor oil and fatty acid diethanolamide. The hydrophilicity, that is, the value of HLB is about 3 to 20, preferably about 7 to 15.

The amphoteric surfactant used as an adjuvant in the present invention is, for example, N, N-dimethyl-N-.
Alkyl-N-carboxymethylammonium betaine, N, N-dialkylaminoalkylenecarboxylic acid salt, N, N, N-trialkyl-N-sulfoalkyleneammonium betaine, N, N-dialkyl-N, N
-Bispolyoxyethylene ammonium sulfate betaine and 2-alkyl-1-carboxymethyl-1
-Hydroxyethyl imidazolinium betaine and the like.

As typical examples of the surfactant used in the present invention, polyoxyethylene glycol, polyoxyethylene polyoxypropylene glycol, polyoxyethylene 2-butylhexyl ether, polyoxyethylene dodecyl ether, polyoxyethylene tridecyl. Ether, polyoxyethylene oleyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene nonyl phenyl ether, polyethylene glycol palmitate, polyethylene glycol oleate, polyethylene glycol resinate, betaine lauryl dimethylaminoacetate, 2-alkyl-N-carboxyl Methyl-
Examples thereof include N-hydroxyethyl imidazolinium betaine, undecyl-N-hydroxyethyl-N-carboxymethyl imidazolinium betaine, N-dodecyl betaine and lauric acid amidopropyl betaine.

In the present invention, the fatty acid and its derivative used as an adjuvant are represented by the general formula R ¹ COOR ² (wherein R ¹ has 6 to 28 carbon atoms, preferably 12 to 12 carbon atoms).
18 hydrocarbon groups, R ² is a hydrogen atom or has 1 to 1 carbon atoms
A compound represented by 2 hydrocarbon groups, preferably hydrogen atoms or 1 to 8 hydrocarbon groups). R ¹ and R ² may be saturated or unsaturated, and may have a side chain, or may be linear or cyclic. Moreover, as the derivative, for example, an ester is preferable.

As typical examples of the fatty acid and its derivative used in the present invention, lauric acid, myristic acid, palmitic acid, stearic acid and oleic acid and lauric acid methyl ester, myristic acid methyl ester,
Palmitic acid methyl ester, stearic acid methyl ester, oleic acid methyl ester, linoleic acid methyl ester, lauric acid ethyl ester, myristic acid ethyl ester, palmitic acid ethyl ester, stearic acid ethyl ester, oleic acid ethyl ester, lauric acid 2-ethylhexyl ester Ester, myristic acid 2-ethylhexyl ester, palmitic acid 2-ethylhexyl ester, stearic acid 2-ethylhexyl ester, oleic acid 2-ethylhexyl ester, lauric acid octyl ester, myristic acid octyl ester,
Examples thereof include octyl palmitate, octyl stearate and octyl oleate.

Animal oils used as adjuvants in the present invention include, for example, pupa oil and beef tallow, and hydrogenated oils obtained by hydrogenating these oils.

As the vegetable oil used as an adjuvant in the present invention, for example, flaxseed oil, sunflower oil, castor oil, cottonseed oil, coconut oil, peanut oil, soybean oil, olive oil, rapeseed oil, resin oil, etc. Hardened oil to which is added.

The mineral oil used as an adjuvant in the present invention contains, for example, paraffinic hydrocarbons, olefinic hydrocarbons, alicyclic hydrocarbons and / or aromatic hydrocarbons, and petroleum is distilled. There is a hydrocarbon composition obtained, and as a typical example thereof, light oil,
Mention may be made of kerosene, spindle oil, machine oil, motor oil, cylinder oil and the like.

The liquid fertilizer used as an adjuvant in the present invention is one in which a nitrogen component, a phosphoric acid component, a potassium component and the like which are usually used as fertilizer components are dissolved in water. The nitrogen component fertilizer may be any of ammonia nitrogen, nitrate nitrogen and urea nitrogen, and representative examples thereof include ammonium sulfate, ammonium nitrate, ammonium phosphate and urea. The phosphoric acid component may be water-soluble or salt-soluble, and examples thereof include phosphates such as potassium phosphate and ammonium phosphate. Examples of the potassium component include potassium salts such as potassium sulfate and potassium chloride.

The herbicide for fine-leaf weeds and the herbicide for broad-leaf weeds used in combination with the anti-antagonistic agent for herbicides of the present invention may be any herbicide capable of inducing antagonism when used in combination with each other, and particularly, There is no limitation, and commonly used ones can be used. When the useful crop is, for example, soybean, typical examples of herbicides for lobular weeds include setoxydim, aloxidim, fluazifop-butyl, quizalofop-ethyl and phenoxaprop-ethyl. Further, typical examples of broad-leaved weeding herbicides that antagonize when used in combination with these thin-leaf weeding herbicides include bentazone, imazaquin, acifluorophene sodium, and chlorimuron ethyl.

The ratio between the amount of the herbicide for fine-leaf weeds and the amount of the herbicide for broad-leaf weeds is appropriately selected depending on the types of these herbicides, the types of crops and the types, amounts and distributions of the weeds.

The herbicidal composition of the present invention may be at least a mixture of at least a herbicide for foliar weeds and a herbicide for broadleaf weeds and an anti-antagonistic agent for herbicides of the present invention at the time of application, at the latest. In addition to using these mixtures as pre-formulated thickeners, the anti-antagonistic agent for herbicides of the present invention and each of these single agents and adjuvants until just before the application. Mixtures or mixtures obtained by mixing with admixtures containing any of these single agents and auxiliaries and other agents-for example,
So-called garden mixes-as well as dilutions of these mixtures are included, and also the separate application of these three agents.

Further, the anti-antagonistic agent for herbicides of the present invention is caused to exist in a location where a herbicide for foliar weeds and a herbicide for broad-leaf weeds coexist, and exerts an action of preventing antagonism between the two agents. . That is, the herbicidal antagonistic inhibitor of the present invention is applied when both agents are applied at the same time, one of the herbicides is applied, and thereafter, the herbicide remains at intervals. It can also be applied while the other herbicide applied in between is coexisting.

In the herbicidal composition of the present invention, a fine leaf weed, a herbicide for broadleaf weeds and a herbicide for broadleaf weeds, and an antagonist for the herbicide of the present invention and, if desired, an auxiliary agent such as a spreading agent. As described above, the auxiliary agent may be any of those normally used, as long as it does not impair the manifestation of the drug effect of each agent and the function of the preparation. However, since one of the constituent components of the quaternary ammonium salt-containing polymer compound which is the active ingredient of the herbicidal antagonistic inhibitor of the present invention is a monomer containing a quaternary ammonium salt, selection of this auxiliary agent In that case, sufficient consideration must be given to the ionic species.

There are no particular restrictions on the weeds to which the herbicidal composition of the present invention can be applied, and agricultural fields such as fields and paddy fields, gardens,
It is possible to control weeds in non-agricultural land such as railroad tracks and riverbeds. As a representative example of fine leaf weeds to be controlled,
Barnyardgrass, green squirrel, crabgrass, crabgrass, crabgrass, pearl millet, velvet millet, cedar, sorghum,
Millet, Chinese mustard grass, oats, canary grass, sycamore, Tainubie, canine and Himetanubie. Above all, it is effective in controlling the barnyardgrass, green foxtail, scabbard, crabgrass, crabgrass, velvetgrass, velvet millet, cedar, sorghum, millet and turfgrass. As typical examples of broad-leaved weeds to be controlled, bindweed bindweed, velvetleaf, Ebisugusa, Shiroza,
White-faced fir, purslane, sardine, stag deer, malva morning glory, stag beetle, kosendangsa, radish, white-billed pacific hemlock, commune, euphorbiaceae, chickweed, nocturnal clover, thornweed thistle,
Rurihakobe, Japanese radish, Japanese mustard spinach, apricot, chamomile, halibut, dogwood, Heraomodaka, Himesohagi, Taukogi, Mizuhakobe, Abenome,
Takasaburo, Mizohabe, Azena, Chopsticks, Denjisou, Konagi, Seri, Salix edulis, Scutellaria, Agina, Urikawa, Modaka, Pepper, Hayamasuge, Firefly, Hirumushiro, Mizugaya-tsuri, Tamagaiyatsuri and Kurogwai. Above all, it is effective for the control of Bindweed, Convolvulus, Echinacea, Spodoptera litura, Shiroza, Prunus clam, Purslane, Chrysanthemum, Goldfish, Malaga morning glory, Pleurotus cornucopia, Kosendangsa, Japanese radish, White-billed Datura, Clover, and Euphorbiaceae. The crops include wheat, such as wheat and barley, rice, corn, soybean and cotton. Above all, it is effective when applied to soybean cultivation areas.

The application time and application method are the same as those for usual herbicides, and can be, for example, soil treatment and foliage treatment. Practically, the latter is preferable.

[0035]

The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to these examples. Table 1 shows the quaternary ammonium salt-containing polymer compounds which are herbicidal antagonists used in the following examples.

[0036]

[Table 1]

Example 1 A commercially available 20% cetoxidim emulsion was diluted with water so that the application rate of cetoxidim was 15 g / 10a, and a commercially available solution of 40% bentazone was 200 g / 10a. Then, these diluted solutions are mixed, and a quaternary ammonium salt-containing polymer compound, which is an anti-antagonistic agent for herbicides, is added to the mixed solution so as to be 0.5% by weight based on the amount of the applied solution. Was added. 50 liters / 10 this liquid
It was applied (sprayed) at the rate of a. This is setoxim,
The application rates of bentazone and the anti-antagonistic agent for herbicides per 10a are 15 g, 200 g and 250 g, respectively. Further, as a comparative control group, a mixed treatment group of cetoxidim and bentazone was provided. The plants tested and the growing seasons of these plants at the time of application were the edible millet 4.5 leaf stage to 5 leaf stage Enocologsa 4.5 leaf stage to 5 leaf stage Sorghum 4.5 leaf stage to 5 leaf stage. It was Application was by spraying. The herbicidal effect was visually determined 20 days after the application of the spray liquid. In the evaluation of the herbicidal effect, 100 was completely weeded (dead), and 0 was completely weeded (untreated). The results are shown in Table 2.

[0038]

[Table 2]

Example 2 A herbicidal test was conducted in the same manner as in Example 1 except that a commercially available fluazifop-butyl 35% emulsion was used instead of the 20% setoxidem emulsion. The application rate of each herbicide and anti-antagonistic agent for herbicide per 10a was as follows. That is, fluazifop-butyl 15 g bentazone 200 g herbicide antagonist 250 g Also, as a control group, a mixed treatment group of fluazifop-butyl and bentazone was provided. The results are shown in Table 3.

[0040]

[Table 3]

Example 3 A herbicidal test was conducted in the same manner as in Example 1 except that a commercially available imazaquin 20% liquid agent was used in place of bentazone. The application rate of each herbicide and anti-antagonistic agent for herbicide per 10a was as follows. That is, setoxydim 15 g Imazaquin 50 g Herbicide antagonist 250 g In addition, a mixed treatment group of setoxydim and imazaquin was provided as a comparative control group. The results are shown in Table 4.

[0042]

[Table 4]

Example 4 A commercially available 20% cetoxidime emulsion was treated with water so that the application rate of cetoxime was 30 g / 10a, and a commercially available 40% solution of bentazone was 100 g / 10a. Dilute and mix these dilutions. 0.2% by weight of the quaternary ammonium salt-containing polymer compound, which is an anti-antagonist for herbicides, and the fatty acid or its derivative shown in Table 5 were added to this mixed solution.
And 1 wt% were added, and this solution was added to 20 liters / 10a
Was applied (sprayed). The test method is the same as that of Example 1 except that as the control plot, a mixed treatment plot of cetoxime, bentazone and the above-mentioned P-1 was provided, and a plant having a 4-leaf stage in the growing season was used. The results are shown in Table 6, Table 7 and Table 8.

[0044]

[Table 5]

[0045]

[Table 6]

[0046]

[Table 7]

[0047]

[Table 8]

Example 5 Example 4 was repeated except that a commercially available fluazifop-butyl 35% emulsion was used in place of the cetoxydim 20% emulsion. The amount of each herbicide, anti-antagonistic agent for herbicide and fatty acid or its derivative per 10a was as follows. That is, fluazifop-butyl 30 g bentazone 100 g herbicide antagonist 40 g fatty acid or its derivative 200 g The results are shown in Tables 9, 10 and 11.

[0049]

[Table 9]

[0050]

[Table 10]

[0051]

[Table 11]

Example 6 The procedure of Example 4 was repeated, except that mineral oil was used instead of the fatty acid and its derivative. As an emulsifying agent for mineral oil, 0.2% by weight of Sorpol SORPOL 8283 (manufactured by Toho Chemical Industry Co., Ltd.) was added to the spray application liquid. In addition, this emulsifier has no adverse effect on the antagonistic action and herbicidal action of the herbicidal antagonist and the herbicidal composition of the present invention and on the growth of crops. The results are shown in Table 12.

[0053]

[Table 12]

Example 7 Example 6 was repeated except that a commercially available fluazifop-butyl 35% emulsion was used in place of the setoxim 20% emulsion. The amount of each herbicide, anti-antagonist for herbicide and mineral oil applied per 10a was as follows. In other words, Table 13 shows the results of fluazifop-butyl 30 g bentazone 100 g herbicide anti-antagonist 40 g mineral oil 200 g.

[0055]

[Table 13]

Example 8 Example 8 was carried out in the same manner as in Example 4 except that liquid fertilizer was added in place of fatty acid and its derivative in an amount of 2.5% by weight based on the amount of the applied liquid. The results are shown in Tables 14 and 15.

[0057]

[Table 14]

[0058]

[Table 15]

Example 9 Example 9 was repeated except that a commercially available fluazifop-butyl 35% emulsion was used instead of the 20% cetoxidim emulsion. The application rates of each herbicide, herbicide anti-antagonist and liquid fertilizer per 10a were as follows. That is, fluazifop-butyl 30 g bentazone 100 g herbicide anti-antagonist 40 g liquid fertilizer 500 g The results are shown in Tables 16 and 17.

[0060]

[Table 16]

[0061]

[Table 17]

Example 10 The same procedure as in Example 4 was carried out except that a surfactant was added in place of the fatty acid and its derivative in an amount of 0.5% by weight based on the amount of the application liquid. The results are shown in Tables 18 and 19.

[0063]

[Table 18]

[0064]

[Table 19]

Example 11 Example 11 was repeated except that a commercially available fluazifop-butyl 35% emulsion was used in place of the cetoxydim 20% emulsion. The amount of each herbicide, anti-antagonistic agent for herbicide and fatty acid or its derivative per 10a was as follows. That is, fluazifop-butyl 30 g bentazone 100 g herbicide anti-antagonist 40 g surfactant 100 g The results are shown in Tables 20 and 21.

[0066]

[Table 20]

[0067]

[Table 21]

EFFECT OF THE INVENTION By using the herbicidal antagonistic inhibitor of the present invention and the herbicidal composition containing the herbicidal antagonistic inhibitor of the present invention, the herbicides can be used in combination with these three herbicides. By this, it is possible to prevent the antagonism in the combined use of the herbicide for fine-leaf weeds and the herbicide for broad-leaved weeds, so that it is not necessary to increase the amount of each of the auxiliary drug, the carrier and the herbicide with a small labor. Therefore, the risk of chemical damage is reduced, efficient weeding is possible, and the risk of environmental pollution is reduced, and the contribution of the present invention to industry is extremely high. The effects of the anti-antagonistic agent for herbicides of the present invention can be further increased by using an auxiliary agent together.

Claims (5)

[Claims] 1. An antagonist for a herbicide, which comprises a hydrophilic polymer compound containing a quaternary ammonium salt, and prevents the antagonist in the combined use of a herbicide for fine-leaf weeds and a herbicide for broad-leaf weeds. Preventive agent. 2. A hydrophilic polymer compound containing a quaternary ammonium salt has a molecular weight of 1,000 to 1,000,000.
And a monomer containing a quaternary ammonium salt group and a monomer not containing a quaternary ammonium salt group, and containing a quaternary ammonium salt group:
The antagonistic inhibitor for herbicides according to claim 1, wherein the ratio with the monomer not containing a quaternary ammonium salt group is 5:95 to 100: 0. 3. The herbicidal antagonist inhibitor according to claim 1, wherein the hydrophilic polymer compound containing a quaternary ammonium salt is a compound represented by the following general formula. [Chemical 1] [In the formula, A is a group or a halogen atom having an anion, X is a hydrogen atom or a methyl group, Y is _{hydroxyl, -NH 2, -NHCH 2 NH 2} , -NHCH 2 CH
_{2 NH 2, -NHCH 2 CH 2} CH 2 NH 2, -OCH 2 N
_{H 2, -OCH 2 CH 2 NH} 2, -OCH 2 CH 2 CH 2 N
_{H 2, -N (CH 3)} 2, -NHCH 2 N (CH 3) 2, -NHC
_{H 2 CH 2 N (CH 3} ) 2, -NHCH 2 CH 2 CH 2 N (CH 3)
_{2, -OCH 2 N (CH 3} ) 2, -OCH 2 CH 2 N (CH 3) 2 or _{-OCH 2 CH 2 CH 2 N (} CH 3) shows a _2. Also,
The L: M ratio is from 5:95 to 100-0. ] 4. A hydrophilic polymer compound containing a quaternary ammonium salt according to claim 1, which is used for preventing herbicides for fine-leaf weeds and herbicides for broad-leaved weeds, and for preventing antagonism when both herbicides are used in combination. A herbicidal composition comprising an anti-antagonistic agent for herbicides. 5. A herbicidal method in which a herbicide for fine-leafed weeds and a herbicide for broad-leafed weeds are used in combination so as to induce antagonism, and a hydrophilic polymer compound containing a quaternary ammonium salt according to claim 1 is used. A method for controlling herbicides, which comprises coexisting with an antagonistic agent for herbicide.