herbicides

Abstract

To make a repellent effect against creeping pests appear in a short time after treatment. [Solution] The herbicide contains pelargonic acid and an insecticide that exerts an insecticidal effect against crawling pests when attached to weeds. The content of at least one of pelargonic acid, acetic acid, and d-limonene is 2.0% by weight or more. The insecticide is a contact insecticide that exerts a repellent effect on crawling pests upon contact. The contact insecticide is one or a mixture of two or more of etofenprox, acrinathrin, silafluofen, chlorpyrifos, propetamphos, fenitrothion, pyridaphenthion, fipronil, dinotefuran, imidacloprid, chlorfenapyr, thiamethoxam, clothianidin, indoxacarb, and ethiprole.

Description

[Technical Field]

[0001] The present invention relates to herbicides for eliminating weeds, etc., and particularly to the technical field of herbicides containing chemicals having a pest repellent effect. [Background technology]

[0002] Patent Document 1 discloses that an insecticide is contained in a herbicide that combines multiple active ingredients.

[0003] Patent Document 2 discloses that a herbicide is contained in a harmful animal repellent composition comprising a terpenoid compound monomer and its oligomer or copolymer.

[0004] Patent Document 3 discloses that a herbicide is contained in a harmful animal repellent composition comprising a specific organic amine having a boiling point equal to or higher than a predetermined value. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 4625089 [Patent Document 2] Special Publication No. 7-521 [Patent Document 3] Japanese Patent Application Publication No. 5-70302 Summary of the Invention [Problem to be solved by the invention]

[0006] In areas where weeds grow, not only flying pests such as mosquitoes but also many creeping pests such as ants and pill bugs live. It is believed that by using herbicides containing insecticides or pest repellent compositions containing herbicides as described in Patent Documents 1 to 3, it is possible to simultaneously exterminate pests and remove weeds.

[0007] However, even if herbicides such as those described in Patent Documents 1 to 3 are used, it is difficult for the insecticide components and repellent components to reach the ground in areas where weeds are overgrown, and the repellent effect, particularly against creeping pests, is thought to be insufficient and difficult to achieve.

[0008] The present invention has been made in view of the above points, and its object is to make the repellent effect against crawling pests appear in a short time after treatment. [Means for solving the problem]

[0009] In order to achieve the above object, in the present invention, a fast-acting herbicide is made to contain a pest repellent.

[0010] The first invention is characterized by containing at least one of pelargonic acid, acetic acid, and d-limonene, and a pest repellent.

[0011] With this configuration, the weeds wither and droop in a short time after treatment, allowing the pest repellent adhering to the weeds to approach or adhere to the ground. This provides a repellent effect against creeping pests such as ants and pill bugs. In particular, by having the weeds droop near the nest, a high repellent effect is achieved against pests that enter and leave the nest.

[0012] The pest repellent is characterized in that it is a contact repellent that exerts a repellent effect when pests come into contact with it.

[0013] With this configuration, when the herbicide is applied to weeds, the contact repellent also adheres to the weeds because the herbicide contains the contact repellent. For example, when a mosquito, a flying pest, touches a weed in an attempt to land on it, its body comes into contact with the contact repellent, thereby providing a repellent effect against flying pests as well.

[0014] Furthermore, since contact repellents are chemicals that are less likely to evaporate than spatial repellents, they remain attached to withered weeds for a long period of time, providing a repellent effect not only against creeping pests that come into contact with the weeds, but also against flying pests.

[0015] It is also characterized by containing pelargonic acid.

[0016] According to this configuration, since pelargonic acid is contained, the immediate effect of weed control is further enhanced, and the time until weeds wither and droop is shortened. [Effects of the Invention]

[0017] According to the first invention, since the fast-acting herbicide contains a pest repellent, the repellent effect against crawling pests can be achieved in a short time after application.

[0018] Furthermore, the pest repellent effect can be maintained for a long period of time. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, preferred embodiments of the present invention will be described in detail. Note that the following description of preferred embodiments is merely exemplary in nature and is not intended to limit the present invention, its applications, or its uses.

[0020] The herbicide according to an embodiment of the present invention is a liquid agent containing at least a contact repellent that exerts a repellent effect when pests come into contact with it, a spatial repellent, pelargonic acid, and glyphosate. The contact repellent and spatial repellent are pest repellent components. Pelargonic acid and glyphosate are herbicidal components that kill plants such as vegetation and weeds. The herbicide may also contain water to dilute the components, or may contain surfactants, solvents, etc.

[0021] The contact repellent has a vapor pressure of 1.0 x 10 at 25°C. -5The pest repellent is a pest repellent having a vapor pressure of less than 1.0×10 mmHg at 25°C. -6 It is a pest repellent with a viscosity of less than mmHg. As a contact repellent, for example, pyrethroid and organophosphate pest repellents are suitably used. Examples of pyrethroid pest repellents for contact repellents include tralomethrin, bifenthrin, permethrin, fenothrin, cypermethrin, cyphenothrin, cyfluthrin, phthalthrin, resmethrin, etofenprox, acrinathrin, and silafluofen. Examples of organophosphate pest repellents for contact repellents include chlorpyrifos, propetamphos, fenitrothion, pyridaphenthion, as well as fipronil, dinotefuran, imidacloprid, chlorfenapyr, thiamethoxam, clothianidin, indoxacarb, and ethiprole. Microencapsulated versions of these compounds may also be used. Among these, tralomethrin, bifenthrin, fipronil, dinotefuran, and imidacloprid are preferably used. Furthermore, among these, only one kind may be used, or any two or more kinds may be used in combination.

[0022] The spatial repellent has a vapor pressure of 1.0 x 10 at 25°C. -5 The pest repellent is an easily volatilizable insect repellent having a vapor pressure of 1.0×10 mmHg or more at 25°C. -4 It is a pest repellent having a viscosity of mmHg or more. As the spatial repellent, for example, a pyrethroid-based pest repellent is suitably used. Examples of pyrethroid-based pest repellents for spatial repellents include empenthrin, transfluthrin, metofluthrin, profluthrin, and telallethrin. Furthermore, only one of these can be used, or any two or more can be mixed and used.

[0023] The herbicide contains emulsified pelargonic acid, but non-emulsified pelargonic acid may also be included. The glyphosate and pelargonic acid contents are set so that the pelargonic acid content is greater than the glyphosate content. Specifically, the pelargonic acid content is preferably 2.0% by weight or more, more preferably 2.5% by weight or more. The upper limit of the pelargonic acid content can be, for example, 5.0% by weight. This is because even if the pelargonic acid content is 5.0% by weight or more, the immediate effect is not significantly improved.

[0024] In this embodiment, the herbicide is an emulsified version of pelargonic acid, and therefore, compared to herbicides in which a salt of pelargonic acid is dissolved, the herbicidal effect of pelargonic acid, i.e., the herbicidal effect is exerted more quickly by penetrating the stem and leaf surfaces of weeds as plants, lowering the intracellular pH and destroying the cells, thereby further shortening the time it takes for weeds to wither and droop.

[0025] If the pelargonic acid content is less than 2.0% by weight, it takes longer for weeds to wither and the immediate effect is reduced, but if the pelargonic acid content is 2.0% by weight or more, a high level of herbicidal effect can be obtained so that the user can fully feel the immediate effect.A pelargonic acid content of 2.5% by weight or more can achieve an even higher herbicidal effect, so it is preferable, and more preferably 3.0% by weight or more.

[0026] In addition, at least one of pelargonic acid, acetic acid, and d-limonene may be contained as a fast-acting herbicide. When only acetic acid or only d-limonene is contained as a fast-acting herbicide, the herbicidal effect appears quickly.

[0027] Glyphosate penetrates the stems and leaves of plants and is transported throughout the plant, inhibiting amino acid synthesis and killing the entire plant. Although its herbicidal effect appears more slowly than pelargonic acid, it is superior to pelargonic acid in that it can kill plants down to their roots.

[0028] The glyphosate content is set to 0.5% by weight or more, preferably 1.0% by weight or more. The upper limit of the glyphosate content is preferably set to, for example, 2.0% by weight. This is because even if the glyphosate content is set to 2.0% by weight or more, the herbicidal effect of glyphosate is not significantly increased.

[0029] If the glyphosate content is less than 0.5% by weight, it may take a long time for certain types of weeds to die down to the roots, but if the glyphosate content is 0.5% by weight or more, a high herbicidal effect can be achieved against many weeds over a long period of time.

[0030] Because herbicides are liquid, they can be applied to weeds by spraying them from above. Herbicides can be commercialized by storing them in a container that makes spraying easy, such as a plastic container with a capacity of about 1000 ml to 2000 ml. A spray nozzle or shower nozzle with a built-in pump mechanism can be attached to the container.

[0031] The herbicide can also be made into an aerosol product by placing it in an aerosol can together with a propellant, such as LPG (liquefied petroleum gas).

[0032] Next, the effects of herbicides will be explained separately for herbicidal effect and pest repellent effect. First, the herbicidal effects of immediate action, translocation, and persistence will be explained based on the test results. In the test for immediate action, wood sorrel (a perennial weed of the Oxalidaceae family), mugwort (a perennial weed of the Asteraceae family), and crabgrass (annual weed of the Poaceae family) were used as test plants (weeds). The test method involved cutting weed leaves from the leafy branches, arranging them on absorbent white paper, and spraying the test agent so that the entire leaf was thoroughly wet. The time elapsed from the start of spraying was measured, and the condition of the leaves was observed at 5, 10, 20, 30, 40, 60, 90, and 120 minutes after the start of spraying.

[0033] The test herbicide prepared as an example was a herbicide (Example 1) containing 3.0% by weight of emulsified pelargonic acid, a contact repellent, a spatial repellent, and 1.0% by weight of glyphosate.

[0034] When the herbicide of Example 1 was sprayed on wood sorrel, the leaves began to brown 5 minutes after the start of spraying, and 100% of the leaves had browned or shrunk after 30 minutes. This shows that it has a high immediate effect. Furthermore, when the herbicide of Example 1 was sprayed on mugwort, the leaves began to brown 30 minutes after the start of spraying, and 90% or more of the leaves had browned or shrunk after 120 minutes. Furthermore, when the herbicide of Example 1 was sprayed on crabgrass, the leaves began to brown 30 minutes after the start of spraying, and 100% of the leaves had browned or shrunk after 90 minutes.

[0035] In the translocation test, potted wood sorrel plants were used as test plants (weeds). The test method involved applying the test agent to 50% of the leaves, measuring the time that had passed since the start of application, and observing the withering of the wood sorrel at 1, 2, 3, and 7 days after application.

[0036] The test agents prepared were the herbicide of Example 1 above and the herbicide of Comparative Example 1 (containing 1.0% by weight of glyphosate) which did not contain pelargonic acid but contained glyphosate.

[0037] When the herbicide of Example 1 was sprayed on wood sorrel planted in a pot, most of the plant had withered within three days of the start of spraying, and the entire plant had withered within seven days. This shows that the herbicide has a high level of migration to the roots, and can kill the plant right down to the roots. On the other hand, when the herbicide of Comparative Example 1 was sprayed on wood sorrel planted in a pot, fewer parts had withered compared to Example 1 within three days, but the entire plant had withered within seven days.

[0038] For the persistence test, an outdoor area with lush weeds about 20cm tall was selected, a 30cm square was prepared as a test plot, and photographs were taken and recorded before the herbicide was sprayed (pre-treatment). After treatment, photographs were taken and recorded of the condition of the test plot 1 day, 2 days, 3 days, 7 days, 2 weeks, and 3 weeks later, and the results were compared with the test plot before treatment.

[0039] The test agents prepared were the herbicide of Example 1 and the herbicide of Comparative Example 2 containing glyphosate (containing 0.86% by weight of glyphosate). The application amount was 100 ml / m 2 The treatment was carried out so as to be approximately uniform.

[0040] When treated with the herbicide of Example 1, almost all of the weeds in the test plot withered after one day, and even after three weeks, almost no new weeds sprouted. This shows that the herbicidal effect persists for a long period of at least three weeks. On the other hand, when treated with the herbicide of Comparative Example 2, almost none of the weeds in the test plot withered after one day, and even after three days, some weeds remained. After one week, almost all of the weeds in the test plot withered, and this state was maintained for three weeks.

[0041] Next, the pest repellent effect will be explained. The pest repellent effect will be explained based on the test results, mainly for the repellent effect against crawling pests and the repellent effect against flying pests. Regarding the repellent effect against crawling pests, an area with lush weeds about 30 cm tall was selected outdoors, and a 30 cm square was prepared as a test plot. The number of mainly crawling pests (ants, pill bugs, woodlice, spiders, land snails, and beetles) in the test plot was counted, and then each test agent was sprayed. Before spraying, 11 ants, 2 pill bugs, 10 woodlice, 2 spiders, and 1 beetle were confirmed.

[0042] The spraying was carried out in a 200cm square area centered on the test plot. The number of crawling pests was counted immediately after spraying, and after 3, 7, 21, 33, and 42 days.

[0043] Example 2 was a herbicide containing 3.0 wt% emulsified pelargonic acid, tralomethrin as a contact repellent, transfluthrin as a spatial repellent, and 1.0 wt% glyphosate. Example 2 was formulated to contain 0.0091 wt% tralomethrin. Example 3 contained all the ingredients of Example 2 and was formulated to contain 0.0182 wt% tralomethrin. Example 4 contained all the ingredients of Example 2 and was formulated to contain 0.0303 wt% tralomethrin. Example 5 contained all the ingredients of Example 2 and was formulated to contain 0.0910 wt% tralomethrin. Additionally, a general pest repellent (transfluthrin) was prepared as Comparative Example 3.

[0044] The processing volume is 100 ml / m 2 With this treatment amount, in Example 2, tralomethrin was uniformly applied to the surface of the substrate so as to obtain a concentration of 9 mg / m 2 In Example 3, the amount of tralomethrin applied was 18 mg / m 2 In Example 4, the amount of tralomethrin applied was 30 mg / m 2 In Example 5, the amount of tralomethrin applied was 91 mg / m 2 The amount of sprayed is

[0045] When the herbicides of Examples 2 to 5 were sprayed, the number of creeping pests was zero for 7 days after spraying. In Example 2, 21 days after spraying, several ants were observed, but no other creeping pests were observed. In Example 3, 21 days after spraying, the number of creeping pests was zero. After 33 days, several ants and beetles were observed, but no other creeping pests were observed. In Example 4, 21 days after spraying, several pill bugs were observed, but no other creeping pests were observed. In Example 5, 21 days after spraying, the number of creeping pests was zero. After 33 days, several spiders and land snails were observed, but no other creeping pests were observed. Therefore, it is clear that in Examples 2 to 5, the repellent effect against crawling pests lasts for a long period of time.

[0046] On the other hand, in the case of Comparative Example 3, the number of crawling pests was 0 immediately after spraying, but after 3 days, 8 ants were confirmed, and after 7 days, 11 ants and several pill bugs and woodlice were confirmed. After 21 days, nearly 40 ants were confirmed.

[0047] Next, the repellent effect against flying pests will be explained. The repellent effect against flying pests was tested outdoors where Aedes albopictus (flying pest) was present, using the human decoy method. The tester stood in the center of the test area with both arms exposed, counted the number of Aedes albopictus that tried to suck blood, and captured the Aedes albopictus with an aspirator. The test area was a 4.5m square grass patch, with three locations prepared. The test time was 10 minutes each. The test agent was Example 6, which contained all the ingredients of Example 2, and was administered at 100ml / m 2 When sprayed almost uniformly so that tralomethrin is 18 mg / m 2 The amount of transfluthrin sprayed was 8 mg / m 2 The amount of each component was set so that the spray amount was as follows.

[0048] The herbicide of Example 6 was applied at 100 ml / m 2 The product was sprayed almost uniformly in each test area, and the number of Aedes albopictus mosquitoes captured was counted after 1 hour, 2 hours, 3 hours, 6 hours, 9 hours, 1 day, and 7 days. Only a few were captured after 9 hours, and the rest were 0. This means that the repellent effect against flying pests lasts for a long period of time. It is assumed that the product has a similar repellent effect against flying pests other than Aedes albopictus.

[0049] Next, we will explain the test results of the insecticidal effect of the herbicide. The test insects used in the insecticidal test were water-repellent ants and pill bugs. The test agent was Example 6. The test insects were then placed in a petri dish lined with filter paper, and 1 ml of the test agent was sprayed on the test insects with a hand spray. After spraying, the time it took for the test insects to knock down (become startled and unable to move) was measured. For water-repellent ants, the KT50 was approximately 3 minutes 40 seconds, and for pill bugs, the KT50 was approximately 4 minutes 10 seconds. This shows that an excellent insecticidal effect can be obtained against crawling pests.

[0050] As described above, in this embodiment, the herbicide contains a contact repellent, so that the pest repellent effect can be maintained for a long period of time. -5 By using a pest repellent with low transpiration of less than mmHg, the duration of the repellent effect against flying pests and crawling pests can be extended.

[0051] In addition, the herbicidal effect of pelargonic acid appears quickly, which causes weeds to droop, allowing the contact repellent adhering to the weeds to approach or adhere to the ground. This also provides a repellent effect against creeping pests such as ants and pill bugs. In particular, by allowing weeds to droop near nests, a high repellent effect against pests entering and leaving the nests can be achieved in a short period of time.

[0052] In addition, since this is a herbicide made by emulsifying pelargonic acid, the herbicidal effect of pelargonic acid, i.e., by penetrating the surface of the stems and leaves of weeds and lowering the pH inside the cells to destroy the cells, is more rapid than herbicides made by dissolving pelargonic acid salts, thereby further shortening the time it takes for weeds to wither and droop.

[0053] Furthermore, since the herbicide contains a contact repellent, spraying the herbicide can be used to adhere the contact repellent to plants, thereby providing a pest repellent method. Furthermore, since the spatial repellent also adheres to weeds, the weeds serve as a carrier for the contact and spatial repellents. For example, when a flying pest, such as a mosquito, comes into contact with a weed in an attempt to land on it, its body comes into contact with the contact repellent, thereby providing a repellent effect. Furthermore, when a contact repellent adheres to low-growing weeds, it also provides a repellent effect against crawling pests such as ants and pill bugs. Furthermore, when a contact repellent adheres to weeds growing near a nest, it provides a high repellent effect against pests that enter and exit the nest. Furthermore, since contact repellents are chemicals that evaporate less easily than spatial repellents, they remain attached to weeds for a long period of time, providing a repellent effect against flying and crawling pests that come into contact with the weed. The contact repellent can also be applied to various plants.

[0054] In addition, since the spatial repellent is easily evaporated, the spatial repellent transpires around the weeds, providing a pest repellent effect over a wide area.

[0055] The above-described embodiments are merely examples 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]

[0056] The herbicide according to the present invention can be used, for example, in grassy areas where pests live.

Claims

[Claim 1] 2.0% by weight or more of pelargonic acid; one or any two or more of etofenprox, acrinathrin, silafluofen, chlorpyrifos, propetamphos, fenitrothion, pyridaphenthion, fipronil, dinotefuran, imidacloprid, chlorfenapyr, thiamethoxam, clothianidin, indoxacarb, and ethiprole; A herbicide containing