JP7368817B2 - Slug repellent - Google Patents

Description

The present invention relates to, for example, a slug repellent.

Since gastropods such as slugs can cause harm to agricultural crops, etc., pesticides and repellents are used to prevent them from causing harm to agricultural crops as much as possible. As a gastropod repellent, for example, as disclosed in Patent Document 1, zeolite is impregnated with malic acid, the zeolite is coated with linseed oil, and a large amount of malic acid powder is supported on the outer surface of the zeolite. It has been known.

Moreover, the gastropod repellent of Patent Document 2 is water-based and contains saturated aliphatic alcohol and eucalyptus oil.

Furthermore, the gastropod repellent disclosed in Patent Document 3 contains as an active ingredient a fragrance component that has a mucus shedding inhibiting action that prevents mucus from being shed.

Japanese Patent Application Publication No. 2013-71900 Japanese Patent Application Publication No. 2008-231013 Japanese Patent Application Publication No. 2001-163715

By the way, in Patent Document 1, by supporting a large amount of malic acid powder on zeolite, it is useful in that the extermination effect, especially the immediate effect, can be improved compared to a zeolite that does not have malic acid powder. However, users desire higher immediate effects, and improvements are needed in this respect.

Further, Patent Document 2 uses water as a base, and is thought to cause less phytotoxicity to agricultural crops and the like. In addition, although Patent Document 2 discloses the mortality rate when the pesticide of Patent Document 2 is sprayed on gastropods, the specific time from spraying to death, that is, the immediate effect, is unknown. be. Also, the immediate effect of Patent Document 3 is unknown.

The present invention has been made in view of these points, and its purpose is to improve the immediate effectiveness of gastropod repellents.

In order to achieve the above object, the present invention includes a slug repellent containing pelargonic acid.

The first invention is an aqueous liquid containing emulsified pelargonic acid as an active ingredient, and is a slug repellent characterized by containing pelargonic acid in an amount of 3% by mass or more and 10% by mass or less .

According to this configuration, when pelargonic acid comes into contact with the body surface of the gastropod, the gastropod is brought into a knockdown state at an early stage, so that a high immediate effect can be obtained. Additionally, the mortality rate for gastropods is extremely high.

The second invention is characterized by containing a surfactant.

According to this configuration, the emulsified state of pelargonic acid can be stably obtained.

According to the present invention, it is possible to obtain higher immediate effectiveness than conventional pesticides using malic acid or the like.

FIG. 3 is a diagram illustrating Test Example 1. FIG. 6 is a diagram illustrating Test Example 2.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Note that the following description of preferred embodiments is essentially just an example, and is not intended to limit the present invention, its applications, or its uses.

The gastropod repellent according to an embodiment of the present invention exhibits an insecticidal effect, that is, a exterminating effect, on slugs such as the Japanese slug, the Japanese slug, and the mountain slug, as well as on snails and snails. Furthermore, the gastropod repellent has an immediate effect that quickly knocks down the gastropod after it attaches to the gastropod. Knocked down state refers to a state in which the gastropod is unable to move. Even if the gastropod is knocked down, it may not have died, so immediate effect and insecticidal effect are not necessarily the same.

Gastropod repellents are characterized by being liquid, and specifically contain pelargonic acid, a surfactant, and water. Pelargonic acid is present in the gastropod repellent in an emulsified state. Conventionally known methods can be used to emulsify pelargonic acid. Furthermore, the gastropod repellent is water-based, and more specifically, it is an aqueous drug containing more than half of the total components in terms of mass ratio.

The content of pelargonic acid is preferably 1% by mass or more, more preferably 3% by mass or more. If the content of pelargonic acid is less than 1% by mass, it will be difficult to obtain a high immediate effect even if the gastropod repellent adheres to gastropods, so the content of pelargonic acid should be at least 1% by mass or more. When the content of pelargonic acid is 3% by mass or more, the immediate effect is further enhanced compared to when the content is less than 3% by mass. The upper limit of the content of pelargonic acid is preferably 10% by mass, more preferably 20% by mass or less. Pelargonic acid is present in the gastropod repellent in an emulsified state as mentioned above, but if the content of pelargonic acid is too high, it becomes difficult to have it present in the gastropod repellent in a stable state. The upper limit of the acid content is 10% by mass or less. Further, even if the content of pelargonic acid is increased, the degree of immediate effect will hardly change, so the upper limit of the content of pelargonic acid is set to 20% by mass or less. The content of pelargonic acid may be outside the above-mentioned range, but it should be within a range that provides high immediate efficacy and a lethal effect, and that can maintain a stable state in the gastropod repellent. It is preferable to set it in a range of 3% by mass or more and 10% by mass or less.

As the surfactant, various surfactants can be used, and one type or a combination of multiple types can also be used. In this embodiment, a mixture of three types of New Calgen (also referred to as a mixture of three types of NK) is used as a surfactant. The New Calgen 3-type mixture is a mixture of NK D240K, NK D935, and NK EP70G. The blending amounts may be, for example, 15 g for NK D240K, 1.6 g for NK D935, and 5 g for NK EP70G, but other amounts may be used. Since the surfactant acts as an emulsifier to emulsify pelargonic acid, the surfactant must be present in an amount within the above range that allows the pelargonic acid contained in the gastropod repellent to be stably present in an emulsified state. A surfactant may be included in the gastropod repellent.

For example, ion exchange water can be used as the water. The content of water is preferably 80% by mass or more, more preferably 90% by mass or more. By increasing the water content, the drug becomes an aqueous-based drug, which can improve safety.

The gastropod repellent can be used by being stored in a hand spray container 1 as shown in FIG. 1, for example. The hand spray container 1 includes a container main body 2 in which a gastropod repellent is stored, a pump section 3 attached to the container main body 2, a lever 4 for operating the pump section 3, and an injection port 5 for spraying the gastropod repellent. It is equipped with The pump unit 3 is configured so that the user can operate the pump unit 3 by pulling the lever 4 with a finger or the like, and the operation of the pump unit 3 releases the gastropod repellent in the container body 2 into the injection port 5. It can be sprayed from. As this hand spray container 1, a conventionally known one can be used. The injection port 5 is preferably a spray port that sprays the gastropod repellent in the form of a mist. Furthermore, a function to adjust the particle size of the gastropod repellent when sprayed can also be provided.

Alternatively, the gastropod repellent can be placed in an aerosol container together with a propellant to form an aerosol product. Examples of propellants include liquefied petroleum gas and dimethyl ether.

The gastropod repellent may contain a drug other than pelargonic acid and a surfactant. In this case, it is preferable to select the drug and set the content of the drug so as not to inhibit the immediate effect and lethal effect of pelargonic acid.

Examples of the gastropod repellent according to the present invention will be described below, but the present invention is not limited to the examples.

(Test example 1)
In Test Example 1, Examples, which are gastropod-killing agents of the present invention, and Comparative Examples 1 and 2 were prepared as test agents.

In the example, a pelargonic acid formulation was used, and 3 g of pelargonic acid, 4.32 g of a mixture of 3 types of NK, and 92.68 g of ion-exchanged water were used to make a total of 100 g of gastropod repellent. Comparative Example 1 is a malic acid formulation in which the belargonic acid in Example was changed to malic acid. Comparative Example 2 is a citric acid formulation in which pelargonic acid in Example was changed to citric acid.

As shown in FIG. 1, a petri dish 100 is prepared, weeds 101 are placed in the petri dish 100, and then a gastropod repellent contained in a hand spray container 1 is sprayed onto the weeds 101. The amount of weed 101 was set to be about 3 g. Further, the amount of gastropod repellent sprayed is approximately 3 g, and the entire amount is sprayed into the petri dish 100.

After spraying the gastropod repellent onto the weeds 101 and leaving it for one day, the weeds 101 were transferred to a new petri dish 100. The gastropod repellent sprayed on the weeds 101 dried up after being allowed to stand for one day. Three test insects were placed on top of the weed 101 in the new petri dish 100, and the lid 102 was placed on top. The test insect is a slug (Chakoura).

As shown in Table 1, when comparing the number of dead insects 24 hours after placing the test insects on top of the weed 101 in the Petri dish 100, it was found that in the example there was only one insect (mortality rate of about 33%). On the other hand, in Comparative Examples 1 and 2, there were 0 animals, and the mortality rate was 0%. Therefore, the example can achieve a higher mortality rate than Comparative Examples 1 and 2.

Furthermore, by spraying pelargonic acid onto the weeds 101, the weeds 101 wither earlier than when pelargonic acid is not sprayed. In other words, in the examples, it is possible to obtain an immediate effect on gastropods, and also to obtain a herbicidal effect.

(Test example 2)
The test agent and test insect used in Test Example 2 are the same as Test Example 1.

In Test Example 2, as shown in FIG. 2, a tissue 103 was spread on a petri dish 100, and a sample insect was placed on the tissue 103. Thereafter, a gastropod repellent was sprayed onto the test insects and the tissue 103. In addition, the gastropod repellent was also sprayed on the inner surface of the lid 102, and the lid 102 was immediately placed on the petri dish 100. The time required for the test insects to become knocked down (knockdown time) was measured from the time when the petri dish 100 was covered with the lid 102. The measurement results are shown in Table 2.

As shown in Table 2, the knockdown time was extremely short at 2 minutes and 39 seconds in the example, whereas in Comparative Example 1 it was more than 1 minute longer than in the Example; In this case, the time was about 1 minute and 40 seconds longer than in the example. The knockdown time in Table 2 is the average time of three tests for each test agent. In Test Example 2, the number of deaths after 24 hours was 3, and the mortality rate was 100%.

As explained above, according to the gastropod repellent according to this embodiment, the gastropods are brought into a knockdown state at an early stage when pelargonic acid comes into contact with the body surface of the gastropods, so that a high immediate effect can be obtained. Additionally, the mortality rate for gastropods is extremely high.

Furthermore, since it contains emulsified pelargonic acid, the immediate effect on gastropods can be further enhanced. Furthermore, by attaching emulsified pelargonic acid to weeds, the herbicidal effect of pelargonic acid can be further enhanced.

Moreover, pelargonic acid may be present in the gastropod repellent without being emulsified.

The embodiments described above are merely illustrative in all respects and should not be interpreted in a limiting manner. Furthermore, all modifications and changes that come within the scope of equivalents of the claims are intended to be within the scope of the present invention.

As explained above, the gastropod repellent according to the present invention can be used to exterminate gastropods such as slugs.

1 Hand spray container 2 Container body 3 Pump part 4 Lever 5 Spout

Claims (2)

It is an aqueous liquid containing emulsified pelargonic acid as an active ingredient.
A slug repellent characterized by containing pelargonic acid in an amount of 3% by mass or more and 10% by mass or less . The slug repellent according to claim 1,
A slug repellent characterized by containing a surfactant.

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