Herbicidal and pest removal methods

Abstract

To enhance herbicidal and pest removal effects.SOLUTION: An agent containing pelargonic acid is applied to weeds, achieving the wilting of the weeds and the removal of pests.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a method for weed and pest control. [Background technology]

[0002] Since gastropods such as slugs can cause damage to agricultural crops, etc., pesticides and repellents are used to minimize the damage caused to agricultural crops, etc. As disclosed in Patent Document 1, for example, a gastropod pesticide is known in which 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.

[0003] Moreover, the gastropod repellent of Patent Document 2 is based on water and contains a saturated aliphatic alcohol and eucalyptus oil.

[0004] Moreover, the gastropod repellent of Patent Document 3 contains as an active ingredient a fragrance ingredient that has a mucus shedding inhibitory effect, preventing the mucus from being shed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2013-71900 A [Patent Document 2] JP 2008-231013 A [Patent Document 3] JP 2001-163715 A Summary of the Invention [Problem to be solved by the invention]

[0006] 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 those that do not contain malic acid powder. However, users want a more immediate effect, and in this respect, improvements were needed.

[0007] In addition, the pesticide in Patent Document 2 is water-based, which is thought to reduce damage to crops and the like. In addition, Patent Document 2 discloses the mortality rate when the pesticide in Patent Document 2 is sprayed on gastropods, but the specific time from spraying to death, that is, the immediate effect, is unknown. In addition, the immediate effect of Patent Document 3 is also unknown.

[0008] The present invention has been made in view of the above-mentioned points, and an object of the present invention is to improve the immediate effectiveness of a gastropod pesticide. [Means for solving the problem]

[0009] In order to achieve the above-mentioned object, the present invention is characterized in that a herbicide and insecticide containing pelargonic acid (except when it contains transfluthrin or tralomethrin) is attached to weeds, thereby killing the weeds and eliminating slugs that come into contact with the weeds.

[0010] According to this constitution, when the gastropods come into contact with the body surface of the gastropods, the gastropods are knocked down quickly, so that a high immediate effect can be obtained and the mortality rate of the gastropods is also extremely high. Effect of the Invention

[0011] According to the present invention, it is possible to obtain a more immediate effect than conventional pesticides using malic acid or the like. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a diagram illustrating Test Example 1. [Diagram 2] FIG. 13 is a diagram illustrating Test Example 2. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. 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.

[0014] The gastropod pesticide according to the embodiment of the present invention exerts an insecticidal effect, i.e., an exterminating effect, on slugs such as the Japanese slug, the brown slug, and the mountain slug, as well as snails and snails. In addition, the gastropod pesticide also has an immediate effect of knocking down the gastropod quickly after adhering to the gastropod. The knockdown state refers to a state in which the gastropod cannot move. Even if the gastropod is knocked down, it may not be dead, so the immediate effect and the insecticidal effect are not necessarily the same.

[0015] The gastropod pesticide is characterized by being liquid, specifically, containing pelargonic acid, a surfactant, and water. The pelargonic acid is present in the gastropod pesticide in an emulsified state. A conventionally known method can be used as a method for emulsifying pelargonic acid. The gastropod pesticide is water-based, specifically, it is an aqueous agent containing water in a mass ratio of more than half of all the components.

[0016] 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 is difficult to obtain a high immediate effect even if the gastropod pesticide adheres to gastropods, so the content of pelargonic acid is at least 1% by mass or more. If the content of pelargonic acid is 3% by mass or more, the immediate effect is further increased compared to when the content of pelargonic acid is less than 3% by mass. The upper limit of the content of pelargonic acid is preferably 10% by mass or less, more preferably 20% by mass or less. As described above, pelargonic acid is present in the gastropod pesticide in an emulsified state, but if the content of pelargonic acid is too high, it becomes difficult to make it exist in the gastropod pesticide in a stable state, so the upper limit of the content of pelargonic acid is set to 10% by mass or less. In addition, even if the content of pelargonic acid is increased, the degree of immediate effect is almost the same, 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 is preferable to set it in the range of 3% by mass or more and 10% by mass or less, as this range has a high immediate effect, provides a lethal effect, and allows the gastropod pesticide to maintain a stable state.

[0017] As the surfactant, various surfactants can be used, and one or more types can be used in combination. In this embodiment, a New Calgen three-type mixture (also called a NK three-type mixture) is used as the surfactant. The New Calgen three-type mixture is a mixture of three types of NK D240K, NK D935, and NK EP70G. The blending amounts can be, for example, 15 g of NK D240K, 1.6 g of NK D935, and 5 g of NK EP70G, but other blending amounts are also acceptable. The surfactant acts as an emulsifier for emulsifying pelargonic acid, so it is sufficient to include in the gastropod pesticide an amount of surfactant that allows the pelargonic acid contained within the above range to be stably present in the gastropod pesticide in an emulsified state.

[0018] The water may be, for example, ion-exchanged water. The water content 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, and safety can be improved.

[0019] The gastropod repellent can be used by being stored in a hand spray container 1 as shown in FIG. 1. The hand spray container 1 includes a container body 2 in which the gastropod repellent is stored, a pump unit 3 attached to the container body 2, a lever 4 for operating the pump unit 3, and a nozzle 5 for spraying the gastropod repellent. The pump unit 3 can be operated by a user pulling the lever 4 with a finger or the like, and the gastropod repellent in the container body 2 can be sprayed from the nozzle 5 by the operation of the pump unit 3. A conventionally known hand spray container 1 can be used. The nozzle 5 is preferably a spray nozzle for spraying the gastropod repellent in a mist form. In addition, a function for adjusting the particle size of the gastropod repellent when sprayed can be added.

[0020] Alternatively, the gastropod repellent may be contained in an aerosol container together with a propellant, such as liquefied petroleum gas or dimethyl ether, to produce an aerosol product.

[0021] The gastropod pesticide may contain a chemical other than pelargonic acid and a surfactant. In this case, it is preferable to select the chemical and set the content of the chemical so as not to inhibit the immediate action and lethal effect of pelargonic acid. EXAMPLES

[0022] Examples of the gastropod pesticide according to the present invention will be described below, but the present invention is not limited to these examples.

[0023] (Test Example 1) In Test Example 1, the gastropod pesticide of the present invention, Example, and Comparative Examples 1 and 2 were prepared as test agents.

[0024] [Table 1]

[0025] The embodiment is a pelargonic acid formulation, and the total amount of the gastropod repellent is 100 g, consisting of 3 g of pelargonic acid, 4.32 g of the NK3 mixture, and 92.68 g of ion-exchanged water. Comparative Example 1 is a malic acid formulation in which the pelargonic acid in the embodiment is replaced with malic acid. Comparative Example 2 is a citric acid formulation in which the pelargonic acid in the embodiment is replaced with citric acid.

[0026] 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 the weeds 101 is set to about 3g. The amount of the gastropod repellent sprayed is set to about 3g, and the entire amount is sprayed into the petri dish 100.

[0027] The gastropod repellent was sprayed on the weeds 101 and left to stand for one day, after which the weeds 101 were transferred to a new petri dish 100. By leaving it to stand for one day, the gastropod repellent sprayed on the weeds 101 had dried. Three test insects were placed on the weeds 101 in the new petri dish 100 and the lid 102 was placed on top of the weeds 101. The test insects were slugs (Cacoura).

[0028] As shown in Table 1, when comparing the number of dead insects 24 hours after placing the test insects on the weeds 101 in the petri dish 100, the number was 1 in the Example (mortality rate of about 33%), whereas the number was 0 in Comparative Examples 1 and 2, resulting in a mortality rate of 0%. Therefore, the Example can obtain a higher mortality rate than Comparative Examples 1 and 2.

[0029] In addition, by spraying pelargonic acid on the weeds 101, the weeds 101 die earlier than when pelargonic acid is not sprayed. In other words, in the embodiment, an immediate effect on gastropods can be obtained, and a herbicidal effect can also be obtained.

[0030] (Test Example 2) The test agent and test insects used in Test Example 2 were the same as those in Test Example 1.

[0031] In Test Example 2, as shown in FIG. 2, tissue 103 was laid on a petri dish 100, and a test insect was placed on the tissue 103. Then, a gastropod repellent was sprayed onto the test insect and tissue 103. The gastropod repellent was also sprayed onto 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 insect to become knocked down from the time the lid 102 was placed on the petri dish 100 (knockdown time) was measured. The measurement results are shown in Table 2.

[0032] [Table 2]

[0033] As shown in Table 2, the knockdown time in the Examples was an extremely short time of 2 minutes 39 seconds, whereas in Comparative Example 1 it was more than 1 minute longer than in the Examples, and in Comparative Example 2 it was about 1 minute 40 seconds longer than in the Examples. 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 in each case, and the mortality rate was 100%.

[0034] As described above, according to the gastropod pesticide of this embodiment, when pelargonic acid comes into contact with the body surface of the gastropod, the gastropod is knocked down early, so that a high immediate effect can be obtained. Also, the mortality rate of the gastropod is extremely high.

[0035] In addition, since the composition contains emulsified pelargonic acid, it is possible to further increase its immediate effectiveness against gastropods. In addition, by attaching the emulsified pelargonic acid to weeds, it is possible to further increase the herbicidal effect of the pelargonic acid.

[0036] Alternatively, pelargonic acid may be present in the gastropod repellent without being emulsified.

[0037] The above-described embodiment is merely illustrative in all respects and should not be construed as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention. [Industrial Applicability]

[0038] As described above, the gastropod control agent according to the present invention can be used to control gastropods such as slugs. [Explanation of symbols]

[0039] 1 hand spray bottle 2 Container body 3. Pump section 4 Lever 5 Nozzle

Claims

[Claim 1] A method for weed and pest control comprising attaching an agent containing pelargonic acid to weeds to kill the weeds and eliminate pests.

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