JP7584776B2 - Herbicides - Google Patents

Description

The present invention relates to herbicides for removing weeds, etc., and in particular belongs to the technical field of herbicides that contain pesticides that have an insecticidal effect against pests.

Herbicides, generally known as pesticides, are widely used (see, for example, Patent Documents 1 and 2). Patent Document 1 discloses a water-suspendable pesticide composition that contains a liquid pesticide component, such as a chloroacetamide-based herbicide, which has low solubility in water, a solid pesticide component, and an oil or fat as an emulsion stabilizer.

Patent Document 2 discloses a foam herbicide that contains an insecticide in addition to herbicide components such as glyphosate, and Table 6 discloses a combination of bialaphos (an oil-based herbicide) and permethrin (an oil-based insecticide).

JP 2012-214495 A Japanese Patent Application Publication No. 05-904

However, in Patent Document 1, since a liquid pesticide with low solubility in water is contained as an essential ingredient, fats and oils are required as emulsion stabilizers, making the manufacturing process complicated. In addition, in Patent Document 2, when an oil-based herbicide such as bialaphos is combined with an oil-based insecticide such as permethrin, a large amount of surfactant is required to dissolve these chemicals in ion-exchanged water.

The present invention was made in consideration of these points, and its purpose is to facilitate the production of herbicides that contain insecticidal ingredients.

In order to achieve the above objective, the present invention involves mixing an aqueous herbicidal component, an aqueous insecticidal component, and a nonionic surfactant.

The first invention is characterized in that it is liquid and contains an aqueous herbicidal component, an aqueous insecticidal component , and a nonionic surfactant, and the aqueous insecticidal component is intended to kill pests living at the base of weeds .

With this composition, the herbicidal component and the insecticidal component are both aqueous and therefore well mixed. This makes it unnecessary to use oils and fats as emulsion stabilizers as in Patent Document 1, and also makes it unnecessary to use large amounts of surfactants as in Patent Document 2, making production easier.

In addition, because the herbicide containing the insecticidal ingredient is liquid, it can be easily sprayed, for example, in areas where weeds are growing, and it can eliminate pests in the area where it is sprayed and in its vicinity.

The second invention is the first invention, characterized in that the aqueous insecticidal component is at least one of a neonicotinoid insecticide and an organophosphorus insecticide.

The third invention is characterized in that in the first or second invention, the aqueous herbicidal component is at least one of an amino acid herbicide, a piperidylium herbicide, and an aromatic acid herbicide.

The fourth invention is any one of the first to third inventions, characterized in that the aqueous herbicidal component is a herbicide with an n-octanol/water partition coefficient of 1 or less as measured by OECD Guidelines for the Testing of Chemicals No. 107, Partition, Coefficient (n-octanol/water): Shake Flask Method (1995).

The fifth invention is any one of the first to fourth inventions, characterized in that the aqueous insecticidal component is an insecticide having an n-octanol/water partition coefficient of 1 or less as measured by OECD Guidelines for the Testing of Chemicals No. 107, Partition, Coefficient (n-octanol/water): Shake Flask Method (1995).

According to the present invention, since it contains an aqueous herbicidal component and an aqueous insecticidal component, it is easy to produce a herbicide that can obtain an insecticidal effect.

The following describes in detail the preferred embodiments of the present invention. Note that the following description of the preferred embodiments is merely illustrative in nature and is not intended to limit the present invention, its applications, or its uses.

The herbicide according to the embodiment of the present invention is liquid and contains an aqueous herbicidal component, an aqueous insecticidal component, and a solvent (water). The aqueous insecticidal component may be at least one of a neonicotinoid insecticide and an organophosphorus insecticide, and may contain both of these insecticides. The aqueous herbicidal component is at least one of an amino acid herbicide, a pipridylium herbicide, and an aromatic acid herbicide, and any two or more of these herbicides may be mixed and used.

The aqueous insecticidal component is preferably an insecticide with a n-octanol/water partition coefficient of 1 or less as measured by OECD Guidelines for the Testing of Chemicals No. 107, Partition, Coefficient (n-octanol/water): Shake Flask Method (1995). The content of the aqueous insecticidal component is, for example, about several wt %.

As shown in Table 1, examples of insecticides with an n-octanol/water partition coefficient of 1 or less include neonicotinoid insecticides such as dinotefuran, acetamiprid, nitenpyram, imidacloprid, clothianidin, and thiamethoxam, and examples of organophosphorus insecticides such as trichlorfon. The water-soluble insecticides listed here are only examples, and various other water-soluble insecticides can be used. Multiple water-soluble insecticides can be used in combination.

In addition, the aqueous herbicidal component is preferably a herbicide with an n-octanol/water partition coefficient of 1 or less as measured by OECD Guidelines for the Testing of Chemicals No. 107, Partition, Coefficient (n-octanol/water): Shake Flask Method (1995).

As shown in Table 2, examples of herbicides with an n-octanol/water partition coefficient of 1 or less include amino acid herbicides such as glyphosate and glyphosinate, piperidylium herbicides such as paraquat and diquat, and aromatic acid herbicides such as 2,4-D (2,4-dichlorophenoxyacetic acid), MCPA (sodium 2-methyl-4-chlorophenoxyacetate), and triclopyr. Other examples include tetrapion and MDBA (potassium dicamba). A mixture of multiple water-soluble herbicides can be used.

The solvent of the herbicide in this embodiment is water, which can easily dissolve the above-mentioned aqueous herbicidal component and aqueous insecticidal component. Note that a solvent other than water may be added to form a mixed solvent within the scope of the gist of the present invention. In addition to the above-mentioned components, further additional components can be blended. Examples of the additional components include, but are not limited to, a spreading agent, a stabilizer (such as an antioxidant), a preservative, etc.

In the herbicide according to this embodiment, the herbicidal component and the insecticidal component are both aqueous, so they mix well together. This makes production easy. In addition, since the herbicide is liquid, it can be stored and used in, for example, a spray container with a spray pump or a spraying container with a shower nozzle. As the spray container, for example, a hand spray container that can be operated by the user's hand, etc. is preferable.

However, the herbicide of the present invention is not limited to liquid form. For example, a solid herbicide can be obtained by dissolving the aqueous herbicidal component and aqueous insecticidal component in a solvent mainly composed of water, spraying or impregnating this solution onto a solid carrier, and then drying. Even in this case, since both the herbicidal component and the insecticidal component are aqueous, they mix well and are easily dissolved in the solvent, making it easy to manufacture a solid herbicide.

When the herbicide of this embodiment is sprayed on an area where weeds are growing, the weeds to which the herbicide adheres will wither and the pests in the sprayed area and its vicinity can be exterminated. The target pests vary depending on the type of insecticide, but examples include crawling pests such as centipedes, pillbugs, and ants.

Next, a specific example of the herbicide of this embodiment will be described. This example is a liquid herbicide that uses water as a solvent, and contains glyphosate ammonium salt as an aqueous herbicidal component, dinotefuran as an aqueous insecticidal component, and a nonionic surfactant as a spreading agent in the following proportions.

Glyphosate ammonium salt: 1.0 wt%
Dinotefuran …… 0.1wt%
Nonionic surfactant: 0.1 wt%

When the components were mixed in the above ratio, each component dissolved in water without any problems. After each component dissolved, a uniform liquid phase was formed, and there was no problem with stability. The nonionic surfactant was added only as a spreading agent and may be omitted. In other words, even if the nonionic surfactant is omitted, glyphosate ammonium salt and dinotefuran will dissolve in water without any problems. When the herbicide thus produced was sprayed on an area where weeds were growing using a container with a shower nozzle, it showed a herbicidal effect and also had an insecticidal effect against crawling pests such as centipedes, pillbugs, and ants. Thus, the herbicide of this example is easy to produce and is excellent in that it can obtain herbicidal and insecticidal effects.

There are no particular limitations on the use of this herbicide, but for example, it is suitable to spray it on areas where weeds grow in the garden of an ordinary household. This allows you to remove weeds from the garden and at the same time exterminate creeping pests (so-called nuisance pests) that live in the garden. Since nuisance pests often live at the base of weeds, using the herbicide of this embodiment as described above is extremely effective in exterminating nuisance pests that live in the garden.

The above-described embodiments are merely illustrative in all respects and should not be interpreted as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention.

As explained above, the herbicide of the present invention can be used, for example, in gardens at ordinary homes.

Claims (3)

A herbicide that contains an aqueous herbicidal component, an aqueous insecticidal component, and a nonionic surfactant, is in a solution state , and is sprayed using a container with a shower nozzle,
The aqueous herbicidal component is a herbicide having an n-octanol/water partition coefficient of 1 or less as measured by OECD Guidelines for the Testing of Chemicals No. 107, Partition, Coefficient (n-octanol/water): Shake Flask Method (1995),
The aqueous insecticidal component is an insecticide having an n-octanol/water partition coefficient of 1 or less as measured by OECD Guidelines for the Testing of Chemicals No. 107, Partition, Coefficient (n-octanol/water): Shake Flask Method (1995);
The aqueous insecticidal component is a herbicide characterized in that it is intended to kill pests living at the base of weeds. 2. The herbicide according to claim 1,
A herbicide characterized in that the aqueous insecticidal component is at least one of a neonicotinoid insecticide and an organophosphorus insecticide. In the herbicide according to claim 1 or 2,
A herbicide characterized in that the aqueous herbicidal component is at least one of an amino acid herbicide, a piperidylium herbicide, and an aromatic acid herbicide.