JP4412582B2 - Herbicidal composition - Google Patents

Description

  The present invention relates to a herbicidal composition for efficiently controlling various harmful weeds, comprising a mixture of a plurality of herbicidal active ingredients.

  There are many herbicides currently on the market, but there are many types of weeds that are subject to control, and the occurrence is over a long period of time, so it has a higher herbicidal effect, has a broader herbicidal spectrum, and has a longer herbicidal period. There is a need for herbicides that are safe for useful plants and have excellent herbicidal properties.

  N- (phosphonomethyl) glycinate salts are herbicidal active ingredients known as non-selective foliar treatment herbicides described in Patent Document 1, and have excellent herbicidal effects in the weed growing season. The problem to be solved was that the weeds of some parts were inferior in effectiveness, and the weed regeneration suppression effect was inferior and the suppression period was short.

  In addition, 2,6-dichlorobenzonitrile is a herbicidal active ingredient known as a migratory herbicide described in Non-Patent Document 1, and has a high vapor pressure and is easily volatilized. Is not used satisfactorily and is mainly used as a granule. Moreover, the subject which should be solved that the herbicidal effect with respect to a grassy weed was inferior was left.

  3- (3,4-Dichlorophenyl) -1,1-dimethylurea is a herbicidal active ingredient known as a non-selective transfer herbicide described in Non-Patent Document 1, has a long-lasting effect, and a herbicidal period However, there is a problem to be solved that cannot be applied to perennial and perennial weeds.

  A herbicide that has a high herbicidal effect, has a broad herbicidal spectrum, has a long herbicidal period, and is safe and useful for useful plants has been desired.

JP 47-39538 A "Overview of Agricultural Chemicals" by Masao Muto Published by Gihodo Inc. 1970

  The object of the present invention is to provide a herbicidal composition that solves the above-mentioned problems, has a high herbicidal effect, has a broad herbicidal spectrum, has a long herbicidal period, and is safe and useful for useful plants. That is.

  As a result of intensive studies, the present inventors have effectively controlled various harmful weeds by combining a plurality of herbicidal active ingredients having different herbicidal mechanisms and herbicidal spectra, and the herbicidal effect is the herbicidal activity. It was found that a synergistic effect was exhibited compared to the case where the components were used alone, and the present invention was completed.

  That is, in the present invention, the herbicidal active ingredient is at least one selected from N- (phosphonomethyl) glycinate salts, 2,6-dichlorobenzonitrile, 3- (3,4-dichlorophenyl) -1,1- A herbicidal composition comprising dimethylurea.

  The present invention is also a herbicidal composition characterized in that the herbicidal composition is a powder wettable powder, a granular wettable powder, a suspension or a powder.

  Below, the herbicidal composition of this invention is demonstrated in detail.

The herbicidal composition of the present invention comprises, as herbicidal active ingredients, at least one selected from N- (phosphonomethyl) glycinate salts (hereinafter abbreviated as “glyphosate salts”), 2,6-dichlorobenzonitrile ( Hereinafter, it will be abbreviated as “dichlorophenyl”) and 3- (3,4-dichlorophenyl) -1,1-dimethylurea (hereinafter abbreviated as “DCMU”).
And are contained.

  Examples of the glyphosate salts include ammonium salts, isopropylamine salts, sodium salts, potassium salts, and trimesium salts, and at least one of these salts is used.

  As a blending ratio of the herbicidal active ingredient in the herbicidal composition of the present invention, 0.1 to 90 parts of glyphosate salt and 0 to 0 of diclobenil in 100 parts by weight of the herbicidal composition (hereinafter abbreviated as “part”). 0.1 to 90 parts, DCMU is 0.05 to 95 parts, and from the viewpoint of herbicidal effect, more preferably, glyphosate salts are 20 to 50 parts, diclobenil is 20 to 50 parts, and DCMU is 5 to 40 parts. Depending on the area to be weeded, the type of weeds, the application time, etc., the mixing ratio is appropriately selected.

  The herbicidal composition of the present invention is formulated by mixing the above herbicidal active ingredients, or a conventionally known solid carrier (calcium carbonate, etc.) or liquid carrier (ethylene glycol etc.) is mixed with the herbicidal active ingredients. , Surfactants (polyoxyethylene styryl phenyl ether sulfate, etc.), penetrants (alkylamine ethoxylates, etc.), spreading agents (higher alcohol ethoxylates, etc.), thickeners (xanthan gum, etc.), antifreezing as required Agents (such as glycerin), binders (such as carboxymethylcellulose), anti-caking agents (such as glycerin), disintegrants (such as crystalline cellulose), preservatives (such as benzisothiazole), antifoaming agents (such as silicon antifoaming agents) ) And fluidity improvers (white carbon, etc.) and other supplements for preparations are added, powder wettable powder, granule wettable powder, suspension powder or powder. It is prepared by formulating. Moreover, you may make the said formulation enclosed with the package which consists of a water-soluble film from a viewpoint of labor saving of a dispersion | spreading operation | work, and a safety improvement of a handler.

  The herbicidal composition of the present invention contains three types of herbicidal active ingredients consisting of glyphosate salts, diclobenil and DCMU, and when each herbicidal active ingredient is used alone and when these two ingredients are used in combination. In comparison, the herbicidal spectrum is synergistically expanded beyond the scope of application, the onset of herbicidal effect is fast, the herbicidal effect on regeneration and the regeneration suppression effect are high, and the herbicidal effect lasts for a long period of time. The spraying labor of the agent can be reduced.

  In addition, the herbicidal composition of the present invention is safe for useful plants such as planting and fruit trees, and can be applied to weed control in residential land, railways, parks, parking lots, orchards and the like.

  The best mode for carrying out the present invention will be described below. In the examples, “part” means part by mass.

  Formulation examples of the present invention are shown below.

Formulation Example 1 (powder wettable powder)
As herbicidal active ingredients, 30 parts of glyphosate isopropylamine salt which is glyphosate salt, 25 parts of diclobenil and 15 parts of DCMU, as additives, 5 parts of polyoxyethylene styryl phenyl ether sulfate, 5 parts of white carbon, 5 parts of higher alcohol ethoxylate, 5 parts of alkylamine ethoxylate and 10 parts of sodium carbonate were mixed and ground uniformly to obtain a powder wettable powder of Preparation Example 1.

Formulation Example 2 (Granule wettable powder)
As a herbicidal active ingredient, glyphosate salt glyphosate isopropylamine salt 30 parts, diclobenil 25 parts and DCMU 15 parts, additives polyoxyethylene styrylphenyl ether sulfate 5 parts, higher alcohol ethoxylate 2 parts, alkylamine ethoxylate 2 1 part, white carbon 6 parts, carboxymethyl cellulose 1 part and sodium hydrogen carbonate 36 parts are mixed uniformly, then kneaded with an appropriate amount of water, and granulated to a size of 0.7 mm using an extrusion granulator. Then, it was dried at a temperature of 50 to 70 ° C. to obtain a granule wettable powder of Formulation Example 2.

Formulation Example 3 (Granular wettable powder)
As herbicidal active ingredients, 48.4 parts of glyphosate isopropylamine salt (62% aqueous solution), 25 parts of diclobenil and 15 parts of DCMU as additives, and 5 parts of polyoxyethylene styryl phenyl ether sulfate as an additive, higher alcohol ethoxylate 2 1 part, 2 parts of alkylamine ethoxylate, 6 parts of white carbon, 1 part of crystalline cellulose and 36 parts of sodium hydrogen carbonate are put into a jacket of a blade type granulator preheated to 100-120 ° C. and mixed. However, after granulating to a size of 0.5 to 1.7 mm, it was dried at a temperature of 50 to 70 ° C. to obtain a granule wettable powder of Formulation Example 3.

Formulation Example 4 (Suspension)
As a herbicidal active ingredient, glyphosate isopropylamine salt (62% aqueous solution) 24.2 parts, diclobenil 20 parts and DCMU 5 parts as additives, ethylene glycol 5 parts, polyoxyethylene styryl phenyl ether sulfate 5 parts, Add 2 parts of higher alcohol ethoxylate, 2 parts of alkylamine ethoxylate, 0.5 part of silicone-based antifoaming agent and 0.1 part of benzisothiazole, add 36.2 parts of water, and mix using a sand grinder. After pulverization, 0.3 part of xanthan gum was added to obtain a suspension agent (flowable agent) of Preparation Example 4.

Formulation Example 5 (powder)
As a herbicidal active ingredient, 15 parts of glyphosate isopropylamine salt which is glyphosate salt, 25 parts of diclobenil and 10 parts of DCMU, 43 parts of calcium carbonate, 5 parts of white carbon, 1 part of polyoxyethylene laurylamine and 1 part of calcium stearate as additives Were mixed and pulverized uniformly to obtain a powder of Formulation Example 5.

  Next, the effect of the herbicidal composition will be described below with reference to test examples.

Test example 1
About the herbicidal composition (powder wettable powder) of the present invention shown in Formulation Example 1, in order to evaluate the herbicidal spectrum, that is, herbicidal and regeneration inhibition effects on annual and perennial grasses, broadleaf plants and horsetail, Tests were conducted on priority planting.

  The test method is that the time of drug treatment is the growing season of each plant, a spray solution corresponding to 3000 g of wettable powder of formulation example 1/200 L of water per 10 a area is prepared, and the treatment amount of each herbicidal active ingredient is 900 g of glyphosate, diclobenil Scattering was performed so that 750 g and DCMU 450 g were obtained.

The test results were evaluated by subjecting the coverage of each plant before treatment to 100% and objectively examining the coverage after the treatment for the herbicidal effect (after 30 days of treatment) and the regeneration inhibition effect (after 360 days of treatment) in the growing season. The results are shown in Table 1. In the table, the evaluation criteria are indicated by the following symbols.
0 to 5%: ●, 6 to 10%: ◎, 11 to 20%: ○, 21 to 40%: □, 41 to 60%: Δ,> 61%: ×

  In this test, a commercially available glyphosate 41% solution (trade name: Roundup High Road, manufactured by Monsanto Company), diclovenil 45% wettable powder (trade names: Casolone wettable powder, manufactured by Agrokanesho Co., Ltd.) and DCMU 80% wettable powder (trade name: Dyrone wettable powder, manufactured by Hodogaya Chemical Co., Ltd.) and a combination of 2 each and commercially available diclobenil 6.7% granule (product) Name: Casolone granule 6.7, manufactured by Agro Kanesho Co., Ltd.) was used for comparison.

  From the results in Table 1, the wettable powder of Formulation Example 1 of the present invention has herbicidal effects and regeneration during the growing season compared to the case where each herbicidal active ingredient is used alone and when these two ingredients are used in combination. It has been shown that it has an excellent inhibitory effect and has a high herbicidal effect on a wider range of grass species, and it works effectively without decreasing the efficacy of diclobenil even though it is a wettable powder.

Test example 2
About the herbicidal composition (granular wettable powder) of this invention shown in the formulation example 2, in order to evaluate a herbicidal effect and a regeneration inhibitory effect, the test was implemented in the spring cedar priority planting fabric.

  The test method is that the chemical treatment time is the growing season of cedar (plant height 20-35 cm), the spraying liquid corresponding to 3600 g of granule wettable powder of formulation example 2/200 L of water per 10 a area is prepared, and the treatment amount of each herbicidal active ingredient Was sprayed to give 900 g of glyphosate, 750 g of diclobenil and 450 g of DCMU.

  The test results were evaluated by an objective survey after 20 days, 60 days, and 360 days after the treatment, assuming that the coverage of horsetail before the drug treatment was 100%. The results are shown in Table 2.

  In this test, a commercially available glyphosate 41% solution (trade name: Roundup High Road, manufactured by Monsanto Company), diclobenil 45% wettable powder (trade names: Casolone wettable powder, manufactured by Agrokanesho Co., Ltd.) and DCMU 80% wettable powder (trade name: Dyrone wettable powder, manufactured by Hodogaya Chemical Co., Ltd.) and a combination of 2 each and commercially available diclobenil 6.7% granule (product) Name: Casolone granule 6.7, manufactured by Agro Kanesho Co., Ltd.) was used for comparison.

  From the results of Table 2, the granulated wettable powder of Formulation Example 2 of the present invention has a herbicidal effect on horsetail, compared with the case where each herbicidal active ingredient is used alone and when these two ingredients are used in combination. Was significantly accelerated and the herbicidal effect increased, and the effect of inhibiting the regeneration of the next year was also higher.

Test example 3
In order to evaluate the herbicidal effect and regeneration inhibitory effect of the herbicidal composition of the present invention (granular wettable powder) shown in Formulation Example 3, a test was carried out on a spring Japanese knotweed priority planting fabric.

  The test method is that the chemical treatment time is the growing season (plant height 40-70 cm), and a spray liquid equivalent to 3000 g of granule wettable powder of formulation example 3/200 L of water per 10 a area is prepared, and the treatment amount of each herbicidal active ingredient is , And sprayed to give 900 g of glyphosate, 750 g of diclobenil and 450 g of DCMU.

  The test results were evaluated by an objective survey after 15 days, 60 days, and 360 days after the treatment, assuming that the weedbird coverage before drug treatment was 100%. The results are shown in Table 3.

  In this test, a commercially available glyphosate 41% solution (trade name: Roundup High Road, manufactured by Monsanto Company), diclobenil 45% wettable powder (trade names: Casolone wettable powder, manufactured by Agrokanesho Co., Ltd.) and DCMU 80% wettable powder (trade name: Dyrone wettable powder, manufactured by Hodogaya Chemical Co., Ltd.) and a combination of 2 each and commercially available diclobenil 6.7% granule (product) Name: Casolone granule 6.7, manufactured by Agro Kanesho Co., Ltd.) was used for comparison.

  From the results in Table 3, the granulated wettable powder of Formulation Example 3 of the present invention exhibits herbicidal action against itadors compared to the case where each herbicidal active ingredient is used alone or in combination of these two ingredients. Was significantly accelerated and the herbicidal effect increased, and the effect of inhibiting the regeneration of the next year was also higher.

Test example 4
About the herbicidal composition (suspension) of this invention shown in the formulation example 4, in order to evaluate a herbicidal effect and a regeneration inhibitory effect, the test was implemented in the spring cedar priority planting fabric.

  In the test method, the chemical treatment time is set as a cedar growing season (plant height of 20 to 35 cm), a spray solution corresponding to 4000 g of suspension of formulation example 4/200 L of water per 10 a area is prepared, and the treatment amount of each herbicidal active ingredient is The dispersion was applied to 600 g of glyphosate, 800 g of diclobenil and 200 g of DCMU.

  The test results were evaluated by subjecting the coverage after treatment to 20%, 60 days, and 270 days after setting the coverage of horsetail before treatment with the drug as 100%. The results are shown in Table 4.

  In this test, a commercially available diclobenil 6.7% granule (trade name: Catolone granule 6.7, manufactured by Agro Kanesha Co., Ltd.) was used as a comparison target.

  From the results shown in Table 4, the suspension of Formulation Example 4 of the present invention has a faster herbicidal action on horsetail, compared to the case of using diclobenil granules alone, and has a higher effect in the regeneration inhibition effect of the following year. Indicated.

Test Example 5
About the herbicidal composition (powder) of this invention shown in the formulation example 5, in order to evaluate the herbicidal effect and the regeneration inhibitory effect, the test was implemented in the persimmon shrub priority planting fabric.

  In the test method, the treatment time of the drug is the early stage of the occurrence of canopy (plant height: 10 to 20 cm), and the powder of Formulation Example 5 is equivalent to 2000 g per area of 10 a. It was sprayed so that

  The test results were evaluated by performing an objective survey after 15 days, 20 days, 30 days, and 60 days after the treatment, assuming that the cypress coverage before drug treatment was 100%. The results are shown in Table 5.

  In this test, a commercially available glyphosate 41% solution (trade name: Roundup High Road, manufactured by Monsanto Company) was used as a comparison target.

  From the results of Table 5, the commercially available glyphosate solution to be compared kills the bean of the growing season 20 days after the treatment, but the whole was occupied by the regenerated cane 60 days after the treatment, whereas formulation example 5 The herbicidal composition of the present invention exhibited the effect of killing canopia, completely suppressing regeneration after 60 days of treatment, and maintaining a long herbicidal period.

  The herbicidal composition of the present invention contains three types of herbicidal active ingredients consisting of glyphosate salts, diclobenil and DCMU, and when each herbicidal active ingredient is used singly and when these two ingredients are used in combination. In comparison, the herbicidal spectrum is synergistically expanded beyond the scope of application, the onset of herbicidal effect is fast, the herbicidal effect on regeneration and the regeneration suppression effect are high, and the herbicidal effect lasts for a long period of time. The spraying labor of the agent can be reduced.

The herbicidal composition of the present invention is safe for useful plants such as planting and fruit trees, and can be applied to control weeds such as residential land, railways, parks, parking lots, orchards.

Claims (2)

A herbicidal composition comprising glyphosate isopropylamine salt , 2,6-dichlorobenzonitrile, and 3- (3,4-dichlorophenyl) -1,1-dimethylurea as herbicidal active ingredients object.   The herbicidal composition according to claim 1, wherein the herbicidal composition is a powder wettable powder, a granular wettable powder, a suspension or a powder.