JP4922593B2 - Herbicidal composition - Google Patents

Description

The present invention relates to a herbicide having a herbicidal effect equal to or higher than that of the conventional product while having the same amount of herbicide active ingredient compared to the conventional product, and having a herbicidal effect equivalent to that of the conventional product even if the amount of the herbicide active ingredient is small compared to the conventional product. Is.

  Pesticides usually exert their effects with several grams to several hundred grams of pesticidal active ingredients per 10a, but it is extremely difficult to spread a small amount of herbicide active ingredients uniformly over a wide area. Therefore, the herbicidal active ingredient is usually diluted with a suitable diluent and processed into a form that is easy to spread. This is called a pesticide formulation, but its purpose is (1) making it easier to use pesticides, (2) maximizing efficacy while compensating for the shortcomings of pesticides, and (3) safety and environment for workers. (4) Improvement of workability / labor saving, (5) Functionalization of existing agents, expansion of applications.

For the purpose of (1) described above, agricultural chemicals are diluted with minerals, etc., or easily diluted with water at the time of use. The dosage forms include powders, granules, granule wettable powders, emulsions, A wettable powder, a flowable agent, etc. are mentioned. For the purpose of (2), it is necessary to select a method according to the physical properties of the herbicidal active ingredient, and a surfactant and a stabilizer are added. For (3) and (4), granulation and solidification of the preparation, high concentration of the agrochemical active ingredient, etc. are performed. Moreover, the daily improvements of (1) to (4) are linked to (5).

  There are many forms of agrochemical formulations, of which the largest amount of granules is produced. It can be formulated with almost all herbicide active ingredients, and can be sprayed as it is without dilution during use, and its dosage form is stable and safe to handle, so it can be used in paddy fields and upland fields. This is because is firmly established.

The herbicide active ingredient in the granule is generally added in an amount of about 0.1 to 20% in the granule , and is composed of other minerals, surfactants and the like. However, herbicide active ingredients tend to be inactivated because they are easily adsorbed and washed away in the soil. Furthermore, decomposition may be accelerated during storage. For this reason, it is added in several more portions than the original optimum amount. In recent years, there is concern about environmental pollution of pesticides, but from this point of view, it is not desirable to add extra herbicidal active ingredients. Therefore , an agrochemical formulation in which the amount of herbicide active ingredient added is reduced is desired. And as a formulation other than granules, the herbicide active ingredient is contained in a fairly wide range and high concentration of 0.1 to 90%, but regarding this adsorption, runoff and degradation, not only granules but also other formulations The same can be said.

On the other hand, nitrogen-based compounds are known to become fertilizers for plants when sprayed on soil. Actually, a mixture of three components of nitrogen, phosphorus, and potassium and minerals is often used, and the mixing ratio of these three components is arbitrary and varies depending on the application area and application scene. Nitrogen compounds are present in the soil as ammonium ions and nitrate ions, and these are quickly absorbed by plants and promote their growth, so they are positioned as fast-acting fertilizers.

Under the above circumstances, as a preparation combining an agrochemical and a nitrogen-based compound, a snow melting agent having a herbicidal effect and a method for producing the same (for example, see Patent Document 1) and an insecticide containing a water-soluble salt (for example, see Patent Document 2) ) And the like.
JP 9-316433 A Japanese Patent Laid-Open No. 50-76236

However, the technique described in Patent Document 1 regards a nitrogen compound as a part of the snow melting component, and does not mention the plant growth promoting effect, that is, the fertilizer effect. The technique described in Patent Document 2 is intended to use suspensions as herbicides, insecticides, etc., but nitrogen compounds are used as dispersants and are related to the promotion of plant growth. Absent. That is, there is no formulation combining nitrogen compounds to enhance the herbicidal effect as a herbicide. That is, from the contradictory viewpoints of inhibiting and promoting the growth of the plant body between the herbicide and the nitrogen-based compound, it is difficult to consider the combined use of these, and there was no herbicide combining them.

An object of the present invention is to obtain a herbicide that exerts the maximum herbicidal effect with an optimal minimum amount of herbicide active ingredient with a low environmental load.

In order to reduce the herbicide active ingredient in the herbicide, the present inventors adsorbed and washed away the agrochemical active ingredient on the soil because the herbicide active ingredient in the herbicide does not contact the plant for a long time. It was noted that it must be added to the agent in a premium. For this reason, attention has been focused on agents that can contact and absorb active ingredients in a relatively short time after application. That is, a herbicide having a herbicidal effect equivalent to that of the conventional product even if the herbicide active ingredient is less than that of the conventional product, or a herbicide having a higher herbicidal effect than the conventional product when the same amount of herbicide active ingredient was used. As a result, it was possible to produce the desired agent by adding a nitrogen-based compound having an effect of promoting plant growth to the herbicide.

That is, the present invention is a herbicidal composition containing a herbicidal active ingredient, a nitrogen-based compound having a plant growth promoting effect, and a surfactant. Moreover, a nitrogenous fertilizer is applicable as a nitrogen compound which has the growth promotion effect of the plant body of this invention. Furthermore, the present invention is a method for enhancing the herbicidal effect of a herbicide, characterized in that a herbicide active ingredient is mixed with a nitrogen compound having a plant growth promoting effect.

When using herbicides, the herbicidal active ingredient to be used will be insoluble in water and to some extent adsorbed to the soil, since it will not be effective in the spraying area if it flows out to other areas after leaching into the soil. However, because the soil adsorptivity is too strong, there are some that are not absorbed by the plant body and are wasted, and in some cases they have been washed away. For this reason, some herbicide active ingredients in granules are added. For example, DCMU is used in an amount of about 50% because of its strong soil adsorption.

However, taking into account the recent regulations on agricultural chemicals and environmental pollution, it is not preferable to increase the number of preparations. Therefore, preparations with less herbicidal active ingredients are required. As a means of making an agent with a reduced amount of herbicide active ingredient, (1) Add other materials to reduce the soil adsorption of the herbicide active ingredient, (2) After application, remove the herbicide active ingredient in a short time A method has been devised in which it is absorbed by the plant body and reduces the amount of waste by adsorbing the soil. However, with regard to the method (1), it is difficult to fundamentally relieve the herbicide active ingredient and the soil adsorption force due to complex components (molecules, colloids, etc.) and properties (pH value, etc.) in the soil. It was. Therefore, the present inventors examined the method (2) of absorbing the plant in a short time. There is a time lag after the herbicide is sprayed on the soil until the target plant germinates, and this period promotes soil adsorption of the herbicide active ingredient. Therefore, after spraying the herbicide on the soil, a method for quickly germinating the target plant was considered. And the present inventors paid attention to the effect of the nitrogen-based compound.

Nitrogen-based compounds have long been used as fertilizers and have been confirmed to promote plant growth. That is, by mixing an agrochemical active ingredient and a nitrogen compound in the herbicide, the target plant germinates quickly due to the effect of the nitrogen compound and can be withered by the herbicide active ingredient before being adsorbed to the soil. . As a result, by adding a nitrogen-based compound, the same effect as the conventional product can be obtained even if the herbicide active ingredient is reduced from the conventional product, and the initial effect is also increased. In particular, in the case of non-agricultural land, spraying fertilizer will grow weeds that much, which is considered to have an effect opposite to the herbicidal effect. Even if it was reduced from the product, the same effect as the conventional product was obtained, and the initial effect was also increased.

By adding nitrogen-based fertilizer to the herbicide, when the same amount of herbicide active ingredient as that of the conventional product, it was possible to produce an agent that was superior to the conventional product and superior in final effect. In addition, when obtaining a herbicidal effect equivalent to that of conventional products, the amount of herbicide active ingredient can be reduced by adding nitrogenous fertilizer. As a result, it was possible to effectively utilize the herbicide active ingredients that were wasted due to soil adsorption, runoff, etc., and also to reduce the amount of active ingredients in the herbicides.

Hereinafter, the herbicide component of the present invention and the herbicide production method will be specifically described. Here, the description proceeds with a granule as an example, but the present invention is not particularly limited in the form of the preparation. Granules are preparations included in the particle size range of 300-1700 μm. Granules are the main formulation form of herbicides, and are widely used in paddy fields, upland farmland, home gardening, and non-agricultural land along railway lines. The basic composition consists of herbicide active ingredients, surfactants and minerals. Herbicidal active ingredients cage about contains Marete 0.1 to 20%, agents strength, disintegration after spraying, the surfactant while considering the spreadability properties, are changing the addition amount of the mineral.

The production method is most often an extrusion granulation method, but there are also an impregnation method and a surface coating method. The extrusion granulation method is a method in which raw material powders are mixed, mixed with about 20% water, kneaded, extruded from the holes of the extrusion granulator, granulated, dried and sieved. It is. When liquid raw materials are present, they are dissolved in kneading water in advance. The impregnation method is a method in which a liquid herbicide active ingredient and a mixed liquid thereof are mixed with an oil-absorbing granular carrier and uniformly absorbed and adsorbed. The coating method is a method in which the carrier surface is coated by spraying or mixing using a base material of a granular carrier having a low oil-absorbing ability and, if necessary, a binder. Of these, the extrusion granulation method is most commonly used.

Various combinations of herbicidal active ingredients are performed in consideration of the time of use, place of use, and the like. That is, the herbicidal active ingredient contained in the formulation and one component or two or more components, vary. The amount of herbicidal active ingredient added to the finished herbicide is not uniform because it varies depending on the combination and application conditions, but it can be used at 0.1 to 90% which is generally used. As the herbicidal active ingredient, those commonly used may be used, and examples thereof include DCMU, DCBN, DBN, cyanazine, DCPA, DPA, C-IPC, bromacil and the like.

The addition amount of the nitrogen-based compound used in the present invention is 0.1 to 90%. A sufficient effect is preferably obtained at 1 to 10%. The nitrogen-based compound is not particularly limited, and may be any compound that generally contains nitrogen and can be used as a fertilizer.

That is, any of an ammonia compound, a nitric acid compound, a cyanamide compound, a urea compound, a ureido compound, and a guanidine compound may be used. Specifically, ammonium sulfate, ammonium hydrogen sulfate, ammonium chloride, ammonium nitrate, sodium nitrate, calcium nitrate, potassium nitrate, ammonium phosphate, ammonium monohydrogen phosphate, ammonium dihydrogen phosphate, ammonium chloride, magnesium ammonium sulfate, magnesium ammonium chloride, magnesium phosphate Ammonium, urea, urea gypsum, lime nitrogen, ureaform, isobutylidene diurea (IBDU), cyclodiurea (CDU), guanylurea phosphate, guanylurea sulfate, oxamide, furfural urea reactant, thiourea, dicyandiamide, cucumber Any of fertilizer, green manure, oil candy etc.

The surfactant used in the present invention is not particularly limited, and general nonionic surfactants used in granules, anionic surfactants, and cationic surfactants can be used. You may use these individually or in combination of 2 or more types. Examples of nonionic surfactants include polyoxyethylene lauryl ether, polyoxyethylene alkyl ether, polyoxyethylene alkyl aryl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene aryl phenyl ether, and polyoxyethylene fatty acid ester. For example, anionic surfactants include lignin sulfonate, alkylaryl sulfonate, dialkyl ester sulfonate, alkenyl sulfonate, alkyl sulfate, alkyl benzene sulfonate, polyoxyethylene alkyl ether sulfate, polycarboxylate, naphthalene. Examples include sulfonate, coconut oil fatty acid methyl taurine sodium, olefin sulfonate, phosphate, and higher fatty acid salt. For example, the cationic surfactant may be a quaternary ammonium salt, an alkylamine salt or the like.

Of these, especially when adding olefin sulfonate, lignin sulfonate, and polycarboxylate, in the case of solid preparations, it is effective for disintegration and spreadability of the agent after spraying while maintaining physical strength. I found out that Addition of nitrogenous fertilizer weakened the physical strength of the agent, and the disintegration / spreadability of the agent after spraying was inferior. It became.

In the present invention, mineral powder, water-soluble powder, and vegetable powder may be used as a bulking agent as required, and these may be used alone or in combination of two or more. The mineral powder is not particularly limited, and examples thereof include diatomaceous earth, clay, talc, bentonite, calcium carbonate, calcium sulfate, calcium hydroxide, zeolite, acid clay, quartz sand, quartzite, perlite, permiculite, and attapulgite. Although it does not restrict | limit especially as water-soluble powder, Sugar, urea, sulfate, nitrate, phosphate, hydrochloride, metal salt, ammonium salt, polyvinyl alcohol, carboxymethylcellulose, methylcellulose, starch, dextrin etc. are mentioned. Although it does not restrict | limit especially as vegetable powder, Various plant fiber materials, such as wheat flour, a bran, and bran, are mentioned.

Although the herbicide of this invention is manufactured with the following method, it is an example and is not specifically limited. First, powder raw materials such as herbicide active ingredients, mineral substances, and surfactants are uniformly mixed. When the liquid component is used, it is dissolved in kneading water, added, kneaded, granulated, dried and sieved using an extrusion granulator to obtain the desired product. Nitrogen compounds may be added after being dissolved in kneading water. For the drying, a hot air dryer, a radiation dryer, a heat conduction dryer, or the like is used. The particle size of the target product thus obtained is 0.2 to 2.0 mm, preferably 0.5 to 1.0 mm. In addition, after preparing a base by granulating, drying and sieving in advance other than the nitrogen-based compound by the above method, the target product may be obtained by spraying with water in which the nitrogen-based compound is dissolved and spraying.

EXAMPLES Next, although an Example, a comparative example, and a test example are given and this invention is demonstrated further, this invention is not limited to these. In the following examples, “part” represents “part by mass”. The raw materials used in the experiment are as follows.
Bentonite: manufactured by Hojun Co., Ltd., Kanto bentonite Tenryu-ink clay: manufactured by Katsumiyama Mining Co., Ltd. Katsumiyama clay Sorpol 5050: manufactured by Toho Chemical Co., Ltd. dialkyl ester sulfonate surfactant Sorpol 5060: manufactured by Toho Chemical Co., Ltd. alkyl aryl sulfonate salt surfactant Sorpol 7248: Toho Chemical Polycarboxylate Surfactant Ammonium Sulfate: Pure Chemical Co., Ltd. Reagent Special Grade Ammonium Chloride: Pure Chemical Co., Ltd. Reagent Special Grade Urea: Pure Chemical Co., Ltd. Reagent Special Grade Ethylenediaminetetraacetic acid sodium salt tetrahydrate Japanese product (EDTA): Pure Chemical Co., Ltd. reagent special grade sodium sulfite: Pure Chemical Co., Ltd. reagent special grade product Calcium sulfate: Pure Chemical Co., Ltd. reagent special grade product sodium sulfate: Pure Chemical Co., Ltd. reagent special grade product DCMU: Weeding Active ingredient, 3- (3,4-Dich lorophenyl) -1,1-dimethylurea.
DBN: An abbreviation for 2,6-Dichlorobenzontrile, an active ingredient of herbicide.
DCBN: An abbreviation for 2,6-Dichlorothiobenzamide, an active ingredient of herbicide.
Isouron: An herbicide active ingredient, an abbreviation for 3- (5-tert-Butyl-isoxazo-3-yl) -1,1-dimethylylurea.
Cyanadine: An herbicide active ingredient, an abbreviation for 2- (4-chloro-6-ethylamino-1,3,5-triazin-2-yl) amino-2-methylpropionitile.
Bromacil: An active ingredient of herbicide, an abbreviation for 5-Bromo-3-sec-butyl-6-methyluracil.

6 parts of DCMU, 1 part of isouron, 30 parts of bentonite, 55 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060, and 5 parts of ammonium sulfate were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved, and sized, and obtained the target object.

6 parts of DCMU, 1 part of isouron, 30 parts of bentonite, 53 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060 and 7 parts of ammonium sulfate were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved, and sized, and obtained the target object.

6 parts of DCMU, 1 part of isouron, 30 parts of bentonite, 50 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060, and 10 parts of ammonium sulfate were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved, and sized, and obtained the target object.

3 parts of DCMU, 0.5 part of isouron, 30 parts of bentonite, 53.5 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060 and 10 parts of ammonium sulfate were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved and sized, and obtained the target object.

3 parts of DCMU, 0.5 part of isouron, 30 parts of bentonite, 53.5 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060 and 10 parts of ammonium chloride were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved, and sized, and obtained the target object.

DCMU 2 parts, DBN 3 parts, bentonite 30 parts, clay 52 parts, Sorpol 5050 1 part, Sorpol 5060 1 part and ammonium sulfate 10 parts were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved, and sized, and obtained the target object.

3 parts of DCMU, 3 parts of DBN, 30 parts of bentonite, 51 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060, and 10 parts of ammonium sulfate were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved, and sized, and obtained the target object.

4 parts of DCMU, 3 parts of DBN, 30 parts of bentonite, 50 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060, and 10 parts of ammonium sulfate were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved and sized, and obtained the target object.

DCMU 6 parts, DBN 3 parts, bentonite 30 parts, clay 48 parts, Sorpol 5050 1 part, Sorpol 5060 1 part, ammonium sulfate 10 parts were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved, and sized, and obtained the target object.

6 parts of DCMU, 30 parts of bentonite, 51 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060, and 10 parts of ammonium sulfate were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved, and sized, and obtained the target object.

1 part of cyanana, 30 parts of bentonite, 56 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060, and 10 parts of ammonium sulfate were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved, and sized, and obtained the target object.

1 part of Bromasil, 30 parts of bentonite, 56 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060, and 10 parts of ammonium sulfate were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved, and sized, and obtained the target object.

DCMU 6 parts, DBN 3 parts, cyananadine 2 parts, bentonite 30 parts, clay 46 parts, Sorpol 5050 1 part, Sorpol 5060 1 part, and ammonium sulfate 10 parts were added and mixed uniformly. Thereafter, the mixture was kneaded with water in which 1 part of Sorpol 7248 was dissolved, and granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm. Then, it dried at 60 degreeC for 3 hours, sieved, and sized, and obtained the target object.

DCMU 6 parts, DBN 3 parts, cyananadine 2 parts, bentonite 30 parts, clay 47 parts, Sorpol 5050 1 part, Sorpol 5060 1 part were added and mixed uniformly. Thereafter, the mixture was granulated using an extrusion granulator equipped with a screen having a pore diameter of 0.7 mm, dried at 60 ° C. for 3 hours, and sieved and sized to serve as a base. Furthermore, 10 parts of ammonium sulfate was dissolved in 13 parts of water, and this dissolved water was sprayed onto the base, and then dried again at 60 ° C. for 1 hour to obtain the desired product.

DCMU 6 parts, DBN 3 parts, cyananadine 2 parts, bentonite 30 parts, clay 33 parts, sodium sulfate 7 parts, calcium sulfate 10 parts, Sorpol 5050 1 part, Sorpol 5060 1 part and urea 7 parts were added and mixed uniformly. Then, it granulated using the extrusion granulator which knead | mixed with water and equipped with the screen of 0.7 mm of hole diameters, dried at 60 degreeC for 3 hours, sieved, and obtained the target object.

DCMU 6 parts, DBN 3 parts, cyananadine 2 parts, bentonite 30 parts, clay 30 parts, sodium sulfate 7 parts, calcium sulfate 10 parts, Sorpol 5050 1 part, Sorpol 5060 1 part and urea 10 parts were added and mixed uniformly. Then, it granulated using the extrusion granulator which knead | mixed with water and equipped with the screen of 0.7 mm of hole diameters, dried at 60 degreeC for 3 hours, sieved, and obtained the target object.

[Comparative Example 1]
6 parts of DCMU, 1 part of isouron, 30 parts of bentonite, 61 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060 were added and mixed uniformly. Then, it knead | mixed with water and granulated using the extrusion granulator equipped with the screen of the hole diameter 0.7mm. Then, it dried at 60 degreeC for 5 hours, sieved and sized, and obtained the target object.

[Comparative Example 2]
3 parts of DCMU, 0.5 part of isouron, 40 parts of bentonite, 54.5 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060 were added and mixed uniformly. Then, it knead | mixed with water and granulated using the extrusion granulator equipped with the screen of the hole diameter 0.7mm. Then, it dried at 60 degreeC for 5 hours, sieved and sized, and obtained the target object.

[Comparative Example 3]
DCMU 2 parts, DBN 3 parts, bentonite 30 parts, clay 63 parts, Sorpol 5050 1 part, Sorpol 5060 1 part were added and mixed uniformly. Then, it knead | mixed with water and granulated using the extrusion granulator equipped with the screen of the hole diameter 0.7mm. Then, it dried at 60 degreeC for 5 hours, sieved and sized, and obtained the target object.

[Comparative Example 4]
6 parts of DCMU, 3 parts of DBN, 30 parts of bentonite, 59 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060 were added and mixed uniformly. Then, it knead | mixed with water and granulated using the extrusion granulator equipped with the screen of the hole diameter 0.7mm. Then, it dried at 60 degreeC for 5 hours, sieved and sized, and obtained the target object.

[Comparative Example 5]
6 parts of DCMU, 30 parts of bentonite, 62 parts of clay, 1 part of Sorpol 5050, 1 part of Sorpol 5060 were added and mixed uniformly. Then, it knead | mixed with water and granulated using the extrusion granulator equipped with the screen of the hole diameter 0.7mm. Then, it dried at 60 degreeC for 5 hours, sieved and sized, and obtained the target object.

[Comparative Example 6]
1 part of cyananadine, 30 parts of bentonite, 67 parts of clay, 1 part of Sorpol 5050 and 1 part of Sorpol 5060 were added and mixed uniformly. Then, it knead | mixed with water and granulated using the extrusion granulator equipped with the screen of the hole diameter 0.7mm. Then, it dried at 60 degreeC for 5 hours, sieved and sized, and obtained the target object.

[Comparative Example 7]
1 part of Bromasil, 30 parts of bentonite, 67 parts of clay, 1 part of Sorpol 5050 and 1 part of Sorpol 5060 were added and mixed uniformly. Then, it knead | mixed with water and granulated using the extrusion granulator equipped with the screen of the hole diameter 0.7mm. Then, it dried at 60 degreeC for 5 hours, sieved and sized, and obtained the target object.

[Comparative Example 8]
DCMU 6 parts, DCBN 3 parts, cyananadine 2 parts, bentonite 30 parts, clay 55 parts, Sorpol 5050 1 part, Sorpol 5060 1 part, EDTA 1 part, sodium sulfite 1 part were added and mixed uniformly. Then, it knead | mixed with water and granulated using the extrusion granulator equipped with the screen of the hole diameter 0.7mm. Then, it dried at 60 degreeC for 3 hours, sieved, and sized, and obtained the target object.

The above Examples and Comparative Examples are shown in [Table 1] to [Table 6].

Fifteen drainage holes of about 5 mm were opened at the bottom of the paddle pack, and soil was put in the pack to prepare a test section.
Next, 20 seeds of each type of weeds (Nutcilia, Nobier, Enokorogusa, Aobiu, Kosendangusa) were sprayed on the pack.
Examples 1 to 5 and Comparative Examples 1 and 2 were sprayed at a rate of 5.0 g / m 2, 6.7 g / m 2, 10.0 g / m 2, and 13.3 g / m 2, respectively.
As the spraying time of the test sample, it was sprayed after confirming that weeds had grown, and was designated as “weed generation initial treatment”.
Treatment time: 19 days after the occurrence, after the start of the July experiment, 7 days, 14 days, 28 days, and 36 days later, weeds were compared and evaluated.

[How to read the table]
Judgment is made by a five-step evaluation. 5 means the highest effect, meaning that all the target weeds are withered, and 0 means no effect at all. In general, increasing the amount of treatment increases the effect, and the difference in effect becomes clear as days pass. The second line of the table represents the number of days after the start of the experiment. The evaluation for each weed is shown in [Table 7].

Here, the effect of mixing nitrogenous fertilizer was examined using isouron and DCMU mixed granules as a model. As a result, in [Example 1] to [Example 4] in which 5-10% of ammonium sulfate as a nitrogenous fertilizer was added, the initial effect tends to be realized early against grass weeds of barnyard grass, Nobies, and Enocologusa from 7 days after the treatment. Was observed. In the survey after 36 days after the treatment, the same tendency as the survey results after 7 days after the treatment was observed, and the mixture of 5% or more was compared to the grass family weeds of mosquito, nobies and enokorogusa [Comparative Example 1] [Comparative Example 2 ], An improvement in herbicidal effect was observed. At the same time, ammonium sulfate and ammonium chloride were compared in [Example 4] and [Example 5] as a study of the difference in nitrogenous fertilizer. As a result, ammonium sulphate showed higher herbicidal effect on nobies and enokorogusa than ammonium chloride, but it was observed that herbicidal effect on bark beetle was equivalent.

That is, by adding nitrogen fertilizer, the initial effect was greatly improved, and the improvement of the herbicidal effect was confirmed. Moreover, it turned out that the same effect is acquired also with various nitrogen fertilizers. Experiments with other nitrogen fertilizers were also performed in [Example 21] described later.

Fifteen drainage holes of about 5 mm were opened at the bottom of the paddle pack, and soil was put in the pack to prepare a test section.
Next, 20 seeds of each type of weed (Enocologusa, Agaricus, Nobier, Aobiu, Kosendangusa) were sprayed on the pack.
[Example 6] to [Example 9] and [Comparative Example 3] [Comparative Example 4] were sprayed at a rate of 5.0 g / m2, 6.7 g / m2, and 10.0 g / m2, respectively.
As the spraying time of the test sample, it was sprayed after confirming that weeds had grown, and was designated as “weed generation initial treatment”.
Treatment time: 19 days after the occurrence, after the start of the September experiment, 8 days, 22 days, and 35 days later, weeds were compared and evaluated.
The results are shown in [Table 8].

Here, in the DCMU + DBN mixed granule, the influence of the added amount of DCMU and the presence or absence of ammonium sulfate was examined. Since this test was conducted in September, it is necessary to consider that the heading of gramineous weeds was observed immediately after the treatment and the herbicidal effect was examined at the time of transition to the reproductive growth stage. The herbicidal effect of each agent on various weeds was as follows.
Herbicidal effect on grass weeds
Barb: [Example 9] ≧ [Comparative Example 4]> [Example 6] [Example 7] [Example 8] [Comparative Example 3]
Novie: [Example 8] [Example 9] [Comparative Example 4] ≧ [Example 6] [Example 7] [Comparative Example 3]
Enokorogusa: [Example 9] [Comparative Example 4]> [Example 6] [Example 7] [Example 8] [Comparative Example 3] It shows a high herbicidal effect against nobies at DCMU 4% or more, 6% As a result, it was found that it showed a high control effect against the mosquito, Enocorosa.
When comparing the herbicidal effect of 10% ammonium sulfate in [Example] at 3% and 6% of DCMU, the herbicidal effect is low in [Example 6] and [Comparative Example 3], and the improvement of the herbicidal effect by the mixed effect is not clear. On the other hand, in [Example 9] and [Comparative Example 4], it can be confirmed that the herbicidal effect by mixing is improved in the herbicidal effect on the bark beetle.
In addition, the herbicidal effect on broad-leaved weeds is
Aubiille: [Example 8] [Example 9] [Comparative Example 4]> [Example 6] [Example 7] [Comparative Example 3]
Cosendogusa: [Example 9] [Comparative Example 4]> [Example 8] ≧ [Example 7]> [Example 6] [Comparative Example 3]
Yabusaw: [Example 9] [Comparative Example 4]> [Example 7] [Example 8]> [Example 6] [Comparative Example 3].

From the above results, the ammonium sulfate mixed granule was observed in the heading immediately after the chemical treatment, so that the amount of ammonium sulfate absorbed by the plant decreased because of the reproductive growth period, and the mixing effect due to ammonium sulfate mixing was difficult to express In spite of the fact, the fast-acting effect was not observed, but a tendency to improve the herbicidal effect was observed, and it was found that the herbicidal weed and broad-leaved weed have a high herbicidal effect. In addition, almost the same effect was confirmed in [Example 8] and [Comparative Example 4], and by adding nitrogenous fertilizer, the herbicidal active ingredient can be reduced as compared with the prior art. It was found that the same level of herbicidal effect can be obtained. In this test example, the amount of DCMU added was changed, but this DCMU is a urea compound. Experiments with different amounts of herbicide active ingredients in other lines were carried out in [Example 19].

Fifteen drainage holes of about 5 mm were opened at the bottom of the paddle pack, and soil was put in the pack to prepare a test section. Next, 20 kinds of seeds of various weeds (Enocologosa, Himeshiba) were sprayed on the pack. [Example 10] to [Example 12] and [Comparative Example 5] to [Comparative Example 7] were respectively sprayed at a rate of 7.5 g / m 2, 10.0 g / m 2, and 15.0 g / m 2. As the spraying time of the test sample, it was sprayed after confirming that weeds had grown, and was designated as “weed generation initial treatment”.
Treatment time: After the start of the experiment in October, 13 days, 34 days, and 45 days later, weed weeds were compared and evaluated.
The results are shown in [Table 9].

Here, in addition to the urea herbicide active ingredient DCMU, the triazine herbicide active ingredient cyanana and the uracil herbicide active ingredient bromacil were used to examine the effect on herbicide active ingredients having various skeletons.
[Example 10] and [Comparative Example 5] are studies on DCMU. In [Comparative Example 5], no herbicidal effect was observed on the mosquito, Enocorosa. On the other hand, in [Example 10], growth suppression and low-order leaf wilt were observed in bark beetle and Enocorosa, and a slight improvement in herbicidal effect was confirmed by mixing ammonium sulfate.
[Example 11] and [Comparative Example 6] are studies on cyanazine. [Comparative Example 6] expresses a herbicidal effect against the mosquito under low temperature conditions, but has a small herbicidal effect against enokorogusa. On the other hand, [Example 11] did not improve the herbicidal effect on the bark beetle, but it was confirmed that the herbicidal effect was remarkably improved against the sorghum.
[Example 12] and [Comparative Example 7] are studies on bromacil. In [Comparative Example 7], it has a herbicidal effect on the bark beetle, but has a small herbicidal effect on enochoposa. On the other hand, in [Example 12], it was confirmed that the herbicidal effect was improved for both the mosquito and Enocorosa.

Since this experiment was conducted in a relatively low temperature period, the difference was small, but the effect of adding nitrogenous fertilizer could be confirmed. It was also confirmed that nitrogenous fertilizers are effective for herbicide active ingredients having various skeletons.

Fifteen drainage holes of about 5 mm were opened at the bottom of the paddle pack, and soil was put in the pack to prepare a test section. Next, 20 seeds of each type of weeds (Amaranthus, Aubiyu, Nobie, Kosendangusa, Yabasou, Enokorogusa) were sprayed on the pack. [Example 13] [Example 14] and [Comparative Example 8] were sprayed at a rate of 5.0 g / m2, 6.7 g / m2, and 10.0 g / m2, respectively.
As the spraying time of the test sample, it was sprayed after confirming that weeds had grown, and was designated as “weed generation initial treatment”.
Treatment time: After the start of the March experiment, evaluation was made by comparing the occurrence of weeds after 6 days, 19 days and 31 days.
The results are shown in [Table 10].

Here, comparison was made with agents with different formulation methods. The effects on each test plant are as follows.
Meishiba: Although there is no difference between [Example] and [Comparative Example] in the final effect, [Comparative Example 8] is clearly inferior in the initial effect.
Aubiille: [Example 14] ≧ [Example 13]> [Comparative Example 8] In terms of initial effects, the Example is superior to the Comparative Example, and the overall [Example] is higher in terms of weeding. The effect was obtained.
Nobie: [Example 14]> [Example 13]> [Comparative Example 8] Both the initial effect and the final effect of [Example] obtained a higher herbicidal effect than [Comparative Example].
Kosendangusa: No variation in herbicidal effect between formulations was observed in this study. No improvement in the initial effect by mixing ammonium sulfate was observed.
Yabusaw: [Example 14] ≧ [Example 13]> [Comparative Example 8] Although there was no difference in the initial effect between [Example] and [Comparative Example], [Example] obtained a higher herbicidal effect as the final effect.
Enocologosa: [Example 13] [Example 14]> [Comparative Example 8] Both the initial effect and the final effect obtained the higher herbicidal effect in [Example].

There was no significant difference in Kosendangusa, but there was a significant difference in other weeds. Thus, even if the formulation method was different, it was confirmed that the formulation containing nitrogenous fertilizer (ammonium sulfate) can provide an excellent herbicidal effect.

Fifteen drainage holes of about 5 mm were opened at the bottom of the paddle pack, and soil was put in the pack to prepare a test section.
Next, 20 seeds of various weeds (Enocologosa, Agaricus, Nobier, Aobiu, Kosendangusa, Yabasou) were sprayed on the pack. Examples 14 to 16 and Comparative Example 8 were sprayed at a rate of 5.0 g / m 2, 6.7 g / m 2 and 10.0 g / m 2 respectively. As the spraying time of the test sample, it was sprayed after confirming that weeds had grown, and was designated as “weed generation initial treatment”.
Treatment period: Evaluation was made by comparing the occurrence of weeds after the start of the September experiment, 8 days, 18 days and 35 days later.
The results are shown in [Table 11].

Here, the effect of the agent which added urea other than ammonium sulfate as nitrogenous fertilizer was investigated. The herbicidal effect on each test plant was as follows.
Mehishiba: In the final effect, the example and the comparative example were equivalent. As an initial effect, [Example] obtained a higher herbicidal effect than [Comparative Example].
Aubiille: [Comparative Example] has a higher herbicidal effect than [Example], but is considered to be within the biological error range.
Novier: Although there was no difference between [Example] and [Comparative Example] in the final herbicidal effect, [Example] was better in the initial effect.
Kosendangusa: There was no significant difference in the test drug between the initial and final effects.
Yabusaw: [Example 16]> [Example 14] [Example 15] ≧ [Comparative Example 8] In the initial effect, [Example] has a higher herbicidal effect than [Comparative Example].
Enokorogusa: [Example 16] ≧ [Example 14]> [Example 15]> [Comparative Example 8] [Example] has a higher herbicidal effect for both the initial and final effects.

[Example 14] was ammonium sulfate, and [Example 15] and [Example 16] were urea, but the same herbicidal effect was obtained, and improvement in the herbicidal effect with various nitrogenous fertilizers was confirmed.

The technique of the present invention can be applied to the improvement of herbicides in which the herbicide active ingredients are wasted due to soil adsorption, runoff, etc., and the improvement of herbicides in which the amount of active ingredients in the herbicides is desired to be reduced.

Claims (5)

Active ingredient of herbicide selected from DCMU, cyanazine, bromacil, isouron, nitrogen-based fertilizer selected from ammonium salt, nitrate, cyanamide-based compound, urea-based compound as nitrogen-based compound having plant body growth promoting effect , and A herbicidal composition containing a surfactant. The herbicidal composition according to claim 1, wherein the nitrogenous fertilizer is ammonium sulfate, ammonium chloride, ammonium nitrate, sodium nitrate, calcium nitrate, potassium nitrate, urea or lime nitrogen . The herbicidal composition according to any one of claims 1 or 2 , wherein the herbicidal composition is a granule, a wettable powder or a granular wettable powder. The herbicidal composition according to any one of claims 1 to 3, wherein the plants to be weeded are bark, Aobille, Novier, Yabasou and Enokorogusa. A nitrogenous fertilizer selected from ammonium salts, nitrates, cyanamide compounds, urea compounds as a nitrogenous compound having an effect of promoting the growth of plant bodies as an active ingredient of herbicide selected from DCMU, cyanazine, bromacil, and isouron A method for enhancing the herbicidal effect of a herbicide , which comprises mixing.