JPH11269015A - Herbicidal composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a herbicidal composition capable of improving herbicidal effects and efficiently controlling various kinds of weeds by including a sulfonylurea-based herbicidally active compound and a specific amount of a nitrogen fertilizer therein. SOLUTION: This herbicidal composition is obtained by including (A) a sulfonylurea-based herbicidally active compound and (B) a nitrogen fertilizer in an amount of preferably 0.1-300 pts.wt., more preferably 2-200 pts.wt. based on 1 pt.wt. ingredient A and expressed in terms on nitrogen element so as to provide an application amount of the nitrogen element of 10-1,000 g based on 10 ares. Pyrazosulfuron-ethyl (common name), halosulfuron-methyl (common name), etc., are preferably used as the ingredient A. Ammonium sulfate, ammonium nitrate, niter, lime nitrogen, urea, etc., are cited as the ingredient B; however, the ammonium sulfate and ammonium nitrate are preferably used among them. The composition can be applied to a cultivated land or a non-cultivated land such as a turf, a playground or a site by the sides of a railroad, however, the application to the turf is especially preferred.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a herbicidal composition comprising a sulfonylurea herbicidal active compound and a nitrogen fertilizer,
And a herbicidal method using both of them at the same time.

[0002]

BACKGROUND ART Over the years of research and development of herbicides, a wide variety of chemicals have been put into practical use, and these herbicides have contributed to labor saving in weed control work and improvement in productivity of agricultural and horticultural crops. Sulfonylurea herbicidal active compounds exhibit excellent herbicidal effects at low doses and have high safety against useful plants such as crops and turf, and have already been used in practical use.

[0003]

However, the effect on some weeds may be insufficient, or the effect may be insufficient depending on the weather conditions after application, and the herbicidal effect may be further improved. Requested.

[0004]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, when a sulfonylurea-based herbicidal active compound and a small amount of nitrogen fertilizer are applied simultaneously, the sulfonylurea-based herbicidal active compound is applied alone. The present inventors have found that the herbicidal effect is improved as compared with the case where the harmful weeds can be efficiently controlled, and the present invention has been completed.

That is, the present invention relates to the following [1] to [8]. [1] A herbicidal composition comprising a sulfonylurea-based herbicidal active compound and a nitrogen fertilizer, wherein the application rate of elemental nitrogen in the nitrogen fertilizer is 10 to 1000 g per 10 ares. [2] The herbicidal composition according to [1], which is applied to turf. [3] The herbicidal composition according to [1], which contains 0.1 to 300 parts by weight of a nitrogen element in a nitrogen fertilizer per 1 part by weight of a sulfonylurea herbicidal active compound. [4] The herbicidal composition according to [1], wherein the sulfonylurea herbicidal active compound is pyrazosulfuron-ethyl or halosulfuron-methyl. [5] A herbicidal method, wherein a sulfonylurea-based herbicidal active compound and a nitrogen fertilizer are simultaneously applied, and the application rate of nitrogen element in the nitrogen fertilizer is 10 to 1000 g per 10 ares. [6] The method for weeding according to [5], which is applied to turf. [7] The herbicidal method according to [5], wherein 0.1 to 300 parts by weight of a nitrogen element in the nitrogen fertilizer is applied per 1 part by weight of the sulfonylurea herbicidal active compound. [8] The herbicidal method according to [5], wherein the sulfonylurea herbicidal active compound is pyrazosulfuron-ethyl or halosulfuron-methyl.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The nitrogen fertilizer used in the present invention is not particularly limited as long as it contains a nitrogen element. For example, nitrite, lime nitrogen, ammonium sulfate, ammonium nitrate, salt ammonium, urea, phosphorus ammonium, IB
And ureaform, but ammonium sulfate and ammonium nitrate are preferred. Further, a chemical fertilizer or a compound fertilizer containing a nitrogen element may be used.

[0007] The application rate of nitrogen element in the nitrogen fertilizer used in the present invention is smaller than that of ordinary fertilization, and is 10 to 1000 g per 10 ares, preferably 40 to 750 g.
It is. When the application rate of the nitrogen element in the nitrogen fertilizer is too small, the improvement of the herbicidal effect is not recognized, and when it is too large, the improvement of the herbicidal effect corresponding to the added amount is not recognized, and the nitrogen element does not work effectively.

The sulfonylurea herbicidal compound used in the present invention is not particularly limited as long as it has a sulfonylurea structure. For example, pyrazosulfuronethyl (generic name, test name: NC-31)
1), halosulfuron methyl (halosulfuron methyl /
Generic name, test name: NC-319), imazosulfuron (generic name, test name: TH-913),
Azimsulfuron (generic name, test name: D
PX-47), cyclosulfamuro
n / generic name, test name: AC-140), ethoxysulfuron / generic name, test name: Hoe-40
4), sinosulfuron (generic name, test name: CG-148), rimsulfuron /
Generic name), flazasulfuron (generic name), thifensulfuron methyl (thifensulfuron met)
hyl / generic name), metsulfuron m
ethyl / generic name) and bensulfuron-methyl
uron methyl / generic name, test name: DPX-84) and the like, and pyrazosulfuron-ethyl and halosulfuron-methyl are preferred from the viewpoint of herbicidal effect.

The herbicidal composition and the herbicidal method of the present invention exhibit a suitable herbicidal effect because the amount of nitrogen element in the nitrogen fertilizer is 0.1 to 1 part by weight of the sulfonylurea-based herbicidally active compound.
When 1 to 300 parts by weight is applied, a more preferable herbicidal effect can be expected when 2 to 200 parts by weight is applied. The herbicidal composition and the herbicidal method of the present invention can be applied to the control of various weeds in paddy fields, farmland such as fields and orchards, turf such as golf courses, and sports grounds, non-cultivated lands such as open spaces and track ends. However, it is preferably applied to turf. In addition, any of the treatment methods of soil treatment, soil mixing treatment and foliage treatment can be applied.

[0010] The herbicidal composition and the herbicidal method of the present invention include:
It can be applied at any time before and after germination of seeds of various weeds, but post-emergence treatment is preferred, in which the herbicidal effect is further improved. The sulfonylurea herbicidal active compound and the nitrogen fertilizer of the present invention may be applied at the same time or separately if they are close in time, and both cases are included in the herbicidal method of the present invention. When they are separately treated, the application time interval is usually within 3 days, preferably within 1 day from the viewpoint of the herbicidal effect.

When a sulfonylurea herbicidal active compound and a nitrogen fertilizer are used as a mixture, they may be mixed during application or during preparation. In applying the sulfonylurea herbicidal active compound of the present invention and a nitrogen fertilizer, it is usually mixed with a suitable solid carrier or liquid carrier, and further, if desired, a surfactant, a penetrant, a spreading agent, a thickener, a deicing agent. ,
A binder, an anti-caking agent, a disintegrating agent, an anti-decomposition agent, etc. are added, and the solution, emulsion, wettable powder, aqueous solvent, wettable powder for granules, aqueous solvent for granules, suspension, emulsion, suspo It can be put to practical use in preparations of any dosage form such as emulsions, microemulsions, powders, granules and gels. At this time, it is also possible to simultaneously use a mixture with a plurality of other herbicides, insecticides, fungicides, plant growth regulators, fertilizers and the like. Further, from the viewpoint of labor saving and improvement of safety, the above-mentioned preparation of any dosage form can be provided by being enclosed in a water-soluble package.

Examples of solid carriers include natural minerals such as quartz, kaolinite, pyrophyllite, sericite, talc, bentonite, acid clay, attapulgite, zeolite and diatomaceous earth, calcium carbonate, ammonium sulfate, sodium sulfate and potassium chloride. And the like, synthetic silicic acid and synthetic silicate. As liquid carriers, for example, alcohols such as ethylene glycol, propylene glycol and isopropanol,
Aromatic hydrocarbons such as xylene, alkylbenzene and alkylnaphthalene; ethers such as butyl cellosolve; ketones such as cyclohexanone; esters such as γ-butyrolactone; acid amides such as N-methylpyrrolidone and N-octylpyrrolidone; Vegetable oils such as soybean oil, rapeseed oil, cottonseed oil and castor oil and water.

These solid and liquid carriers may be used alone or in combination of two or more. As a surfactant,
Nonionic properties such as polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene styryl phenyl ether, polyoxyethylene polyoxypropylene block copolymer, polyoxyethylene fatty acid ester, sorbitan fatty acid ester, and polyoxyethylene sorbitan fatty acid ester Surfactant, alkyl sulfate, alkyl benzene sulfonate, lignin sulfonate, alkyl sulfosuccinate, naphthalene sulfonate, alkyl naphthalene sulfonate, salt of naphthalene sulfonic acid formalin condensate, alkyl naphthalene sulfonic acid formalin Salts of condensates, polyoxyethylene alkylaryl ether sulfates and phosphates, polyoxyethylene styryl phenylate Anionic surfactants such as sulfuric acid and phosphates, polycarboxylates and polystyrene sulfonates, cationic surfactants such as alkylamine salts and alkylquaternary ammonium salts, and amphoteric surfactants such as amino acid type and betaine type Is mentioned.

The content of these surfactants is not particularly limited, but is preferably in the range of usually 0.05 to 20 parts by weight based on 100 parts by weight of the preparation of the present invention. These surfactants may be used alone or in combination of two or more. Next, formulation examples of the preparation will be described. However, the present invention is not limited only to these. In the following formulation examples, "SU" means a sulfonylurea herbicidal active compound, and "parts" means parts by weight.

[Wettable powder] SU / nitrogen fertilizer 0.1 to 80 parts Solid carrier 5 to 98.9 parts Surfactant 1 to 10 parts Others 0 to 5 parts Others include, for example, an anti-caking agent and a decomposition inhibitor. You.

[Emulsion] SU / nitrogen fertilizer 0.1 to 30 parts Liquid carrier 45 to 95 parts Surfactant 4.9 to 15 parts Others 0 to 10 parts Others include, for example, spreading agents and decomposition inhibitors.

[Suspension] SU / nitrogen fertilizer 0.1 to 70 parts Liquid carrier 15 to 98.89 parts Surfactant 1 to 12 parts Others 0.01 to 30 parts Others include, for example, an antifreezing agent and a thickener.

[Water dispersible granules] SU / nitrogen fertilizer 0.1 to 90 parts Solid carrier 0 to 98.9 parts Surfactant 1 to 20 parts Others 0 to 10 parts Others include, for example, a binder and a decomposition inhibitor.

[Solution] SU / nitrogen fertilizer 0.01 to 70 parts Liquid carrier 20 to 99.99 parts Others 0 to 10 parts Others include, for example, an antifreezing agent and a spreading agent.

[Granules] SU / nitrogen fertilizer 0.01 to 80 parts Solid carrier 10 to 99.99 parts Others 0 to 10 parts Others include, for example, a binder and a decomposition inhibitor.

For use, the above preparation is sprayed as it is or after being diluted 1 to 10,000 times with water.

Formulation Examples Formulation examples of the formulation of the present invention are shown below, but the invention is not limited thereto. In the following formulation examples, "parts" means parts by weight.

[Formulation Example 1] Wettable powder pyrazosulfuron-ethyl 1 part Ammonium nitrate 50 parts Pyrophyllite 45 parts Solpol 5039 2 parts (Mixture of nonionic surfactant and anionic surfactant: Toho Chemical Industry Co., Ltd. 2 parts of Carplex # 80D (synthetic hydrated silicic acid: trade name of Shionogi & Co., Ltd.) The above are uniformly mixed and pulverized to obtain a wettable powder.

[Formulation Example 2] Water dispersant halosulfuron methyl 1 part Ammonium nitrate 50 parts Pyrophyllite 45 parts Solpol 5039 2 parts (mixture of nonionic surfactant and anionic surfactant: Toho Chemical Industry Co., Ltd. 2) Carplex # 80D 2 parts (Synthetic hydrated silicic acid: Shionogi & Co., Ltd. trade name) The above are uniformly mixed and pulverized to obtain a wettable powder.

[Formulation Example 3] Suspending agent (flowable agent) 1 part of halosulfuron methyl 50 parts of ammonium nitrate 10 parts of agrisol S-710 (nonionic surfactant: trade name of Kao Corporation) 0.5 part of Lunox 1000C (Anionic surfactant: trade name of Toho Chemical Industry Co., Ltd.) Xanthan gum 0.2 part Water 38.3 parts After uniformly mixing, the mixture is wet-pulverized to form a suspending agent.

[Formulation Example 4] Water dispersible granule (dry flowable) 1 part halosulfuron methyl 50 parts nitrate 5 parts hytenol NE-15 (anionic surfactant: trade name of Daiichi Kogyo Seiyaku Co., Ltd.) N 10 parts (anionic surfactant: Nippon Paper Industries Co., Ltd.) Pyrophyllite 34 parts After uniformly mixing and pulverizing the above, a small amount of water was added, followed by stirring, mixing and kneading, followed by extrusion granulator. It is granulated and dried to obtain a wettable powder.

[Compounding Example 5] Granules Halosulfuron methyl 1 part Nitric acid 50 parts Bentonite 30 parts Talc 19 parts After uniformly mixing and pulverizing the above, a small amount of water was added, followed by stirring, mixing and kneading, and an extrusion granulator. And dried to obtain granules.

[0028]

EXAMPLES The present invention will be described below with reference to examples.
The present invention is not limited only to the embodiments. Example 1 A plastic pot having a diameter of 12 cm was filled with soil, and seeds of chickweed were sown. 0.5, 1.0, 2.0 g per 1a of the active ingredient halosulfuron-methyl contained therein in the 12 leaf stage of chickweed
0.25, 0.5, and 1.0 g of agreen wettable powder (trade name) per 1a was sprayed as pyrazosulfuron-ethyl as an active ingredient contained therein. The spray liquid volume was 20 L per 1 a. Also, 1000 ppm of ammonium sulfate and 1 ppm
A section was added so as to be 0000 ppm.

On the 21st day after the treatment, the herbicidal effect on chickweed was observed and investigated. The results are shown in Tables 1 and 2.

[0030]

[Table 1] Table 1. Herbicidal effect on chickweed ──────────────────────────────────── Active ingredient name Component amount Ammonium sulfate concentration Nitrogen amount Nitrogen Amount / herbicidal effect ^* Active ingredient amount g / a ppm g / 10a g / g ──────────────────────────────── ──── Halosulfuron methyl 0.5 0 0 − 6.7 1000 43 8.6 9.2 10000 430 86 9.8 ───────────────────────────── 1.0 0 0 − 9.1 1000 43 4.3 9.8 10000 430 43 9.9 ───────────────────────────── 2.0 0 0 − 9.4 1000 43 2.15 9.8 10000 430 21.5 10.0 ──────────────────────────────────── * Herbicidal effect: 0 (no effect) ~ 10 (complete death)

[0031]

[Table 2] Table 2. Herbicidal effect on chickweed ──────────────────────────────────── Active ingredient name Component amount Ammonium sulfate concentration Nitrogen amount Nitrogen Amount / herbicidal effect ^* Active ingredient amount g / a ppm g / 10a g / g ──────────────────────────────── Persulfuron ethyl 0.25 0 0 − 9.1 10000 430 172 9.4 ───────────────────────────── 1.0 0 0 − 8.9 10000 430 86 9.9 ───────────────────────────── 2.0 0 0-9.7 10000 430 43 9.9 ─────── * Herbicidal effect: 0 (no effect) to 10 (complete death)

As is clear from Tables 1 and 2, improvement of the herbicidal effect of halosulfuron-methyl and pyrazosulfuron-ethyl was observed by adding ammonium sulfate to the spray solution at a concentration of 1000 ppm or 10,000 ppm. Example 2 A plastic pot having a diameter of 12 cm was filled with soil, and ragweed seeds were sown. In the 4 leaf stage of ragweed, in pool wettable powder (trade name) as active ingredient halosulfuron-methyl contained therein 0.5, 1.0 per 1a,
2.0g was sprayed. The spray liquid volume was 20 L per 1 a. Also,
There was also provided a section in which ammonium sulfate (ammonium sulfate) and ammonium nitrate (ammonium nitrate) were added so as to be 10,000 ppm and 10,000 ppm, respectively, in the spray liquid.

On the 24th day after the treatment, the herbicidal effect on ragweed was observed and investigated. Table 3 shows the results.

[0034]

[Table 3] Table 3. Herbicidal effect on ragweed ──────────────────────────────────── Active ingredient name Component amount Fertilizer Fertilizer concentration Nitrogen amount Nitrogen content / Herbicidal effect ^* Active ingredient content g / a ppm g / 10a g / g ─────────────────────────────── ───── Halosulfuron methyl 0.5 − 0 0 − 9.1 Ammonium sulfate 10000 430 86 9.2 Ammonium 10000 708 142 9.7 ────────────────────────── ──── 1.0 − 0 0 − 9.4 Ammonium sulfate 10000 430 43 9.8 Nitric acid 10000 708 70.8 9.8 ────────────────────────────── 2.0 − 0 0 − 9.2 Ammonium sulfate 10000 430 21.5 9.8 Nitric acid 10000 708 35.4 10.0 ────────────────────────────────── * Herbicidal effect: 0 (no effect) to 10 (complete death)

As is evident from Table 3, the addition of ammonium sulfate and ammonium nitrate at a concentration of 10,000 ppm to the spray liquid improved the herbicidal effect of halosulfuron-methyl. [Example 3] In pool wettable powder (trade name) was sprayed as 1 g and 2 g of halosulfuron-methyl as an active ingredient contained in Kouraishiba, a golf course in Hiroshima Prefecture, where himemukamyogi and himejoon were generated. Spray liquid volume
20L per 1a. In addition, a treatment section was provided in which the chemical fertilizer product was added to the spraying liquid so as to be 500 or 1000 ppm in terms of nitrogen.

[0036] On the 26th day after the treatment, the herbicidal effect on Himemukaisomugi and Himejoon was observed and investigated. Table 4 shows the results.

[0037]

Table 4 Table 4. Herbicidal effect on white clover and giant arborealis ──────────────────────────────────── Nitrogen content / Herbicidal effect ^* Active ingredient Name Ingredient Amount Nitrogen Concentration Nitrogen Amount Active Ingredient ─────────── g / a ppm g / 10a g / g ─────────────────── Halosulfuron methyl 1.0 0 0 − 5.0 6.0 2.0 0 0 − 6.5 7.0 ──────────────── ────────────── 1.0 500 100 10 8.0 9.0 2.0 500 100 5 8.5 10.0 ──────────────────────── ────── 1.0 1000 200 20 8.0 9.5 2.0 1000 200 10 8.5 10.0 ──────────────────────────────── * Herbicidal effect: 0 (no effect) to 10 (complete death)

As is clear from Table 4, 50% of nitrogen fertilizer was used.
Improvement of the herbicidal effect of halosulfuron-methyl was confirmed by adding to the spray liquid at a concentration of 0 to 1000 ppm. [Example 4] Inpool wettable powder (trade name) was sprayed as halosulfuron-methyl as an active ingredient contained therein at an amount of 1 g and 2 g per 1 a to Kouraishiba at a golf course in Hiroshima prefecture where dandelion and himejoon were generated. Spray liquid volume
20L per 1a. In addition, a treatment section was also provided in which the chemical fertilizer product was added to the spray liquid so as to be 250 or 500 ppm in terms of nitrogen.

On the 25th day after the treatment, the herbicidal effects on Himemukaisomugi and Himejoon were observed and investigated. Table 5 shows the results.

[0040]

Table 5 Table 5. Herbicidal effect on white clover and giant arborealis ──────────────────────────────────── Nitrogen content / Herbicidal effect ^* Active ingredient Name Ingredient Amount Nitrogen Concentration Nitrogen Amount of Active Ingredient ─────────── g / a ppm g / 10a g / gハ ロ Halosulfuron methyl 1.0 0 0 − 1.0 6.0 2.0 0 0 − 2.0 6.0 ──────────────── ────────────── 1.0 250 50 5 1.5 7.5 2.0 250 50 2.5 2.5 7.5 ──────────────────────── ────── 1.0 500 100 10 2.0 8.0 2.0 500 100 5 3.0 8.5 ──────────────────────────────── * Herbicidal effect: 0 (no effect) to 10 (complete death)

As is clear from Table 5, nitrogen fertilizer was added to 25
By adding to the spray liquid at a concentration of 0 to 500 ppm, improvement in the herbicidal effect of halosulfuron-methyl was recognized.

[0042]

EFFECT OF THE INVENTION By simultaneously applying a sulfonylurea herbicidal active compound and a small amount of nitrogen fertilizer, the herbicidal effect is improved as compared with the case where a sulfonylurea herbicidal active compound is applied alone, and various harmful weeds can be efficiently removed. Can be controlled.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C05C 1:00)

Claims (8)

[Claims] 1. A herbicidal composition comprising a sulfonylurea herbicidal active compound and a nitrogen fertilizer, wherein the application rate of elemental nitrogen in the nitrogen fertilizer is 10 to 1000 g per 10 ares. 2. The herbicidal composition according to claim 1, which is applied to turf. 3. The herbicidal composition according to claim 1, which contains 0.1 to 300 parts by weight of nitrogen element in the nitrogen fertilizer per 1 part by weight of the sulfonylurea herbicidal active compound. 4. A sulfonylurea herbicidal active compound,
The herbicidal composition according to claim 1, which is pyrazosulfuron-ethyl or halosulfuron-methyl. 5. A herbicidal method wherein a sulfonylurea herbicidal active compound and a nitrogen fertilizer are applied simultaneously, and the application rate of elemental nitrogen in the nitrogen fertilizer is 10 to 1000 g per 10 ares. 6. The method according to claim 5, wherein the method is applied to turf. 7. The herbicidal method according to claim 5, wherein 0.1 to 300 parts by weight of nitrogen element in the nitrogen fertilizer is applied to 1 part by weight of the sulfonylurea herbicidal active compound. 8. The sulfonylurea herbicidally active compound,
The herbicidal method according to claim 5, which is pyrazosulfuron-ethyl or halosulfuron-methyl.