JP2018062470A - Herbicide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a repellent effect on creeping pests to be expressed soon after treatment.SOLUTION: A herbicide contains pelargonic acid, and a pest repellent.SELECTED DRAWING: None

Description

  The present invention relates to a herbicide for removing weeds and the like, for example, and particularly belongs to the technical field of containing a drug having an effect of repelling pests.

  Patent Document 1 discloses that an herbicide containing a combination of a plurality of active ingredients contains an insecticide.

  Patent Document 2 discloses that a herbicide is contained in a harmful animal repellent composition comprising a terpenoid compound monomer and a low-polymerization compound and a low-copolymerization compound.

  Patent Document 3 discloses that a herbicide is contained in a harmful animal repellent composition comprising a specific organic amine having a boiling point of a predetermined value or more.

Japanese Patent No. 4625089 Japanese Patent Publication No. 7-521 JP-A-5-70302

  By the way, where the weeds are thick, there are many insect pests such as ants and gumworms in addition to flying insect pests such as mosquitoes. If the herbicide containing an insecticide like patent documents 1-3 and the harmful animal repellent composition containing a herbicide are used, it will be possible to carry out pest control and weed removal at the same time. .

  However, even when herbicides such as Patent Documents 1 to 3 are used, insecticide components and repellent components are difficult to reach near the ground where weeds are overgrown, and in particular, the repellent effect against moth pests is not sufficient. It may be difficult to appear.

  This invention is made | formed in view of this point, The place made into the objective is to make the repellent effect with respect to a pest insect appear in a short time after a process.

  In order to achieve the above object, in the present invention, a pest repellent is included in a herbicide having an immediate effect.

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

  According to this configuration, since the weeds wither and hang down in a short time after the treatment, the pest repellent adhering to the weeds approaches or adheres to the ground. Thereby, a repellent effect is acquired also with respect to insect pests, such as an ant and a rubber bug. In particular, weeds that hang down near the nest provide a high repellent effect against pests entering and exiting the nest.

  According to a second invention, in the first invention, the pest repellent is a contact repellent that exhibits a repellent effect when the pest contacts.

  According to this configuration, when the herbicide is attached to the weeds, the contact repellent also adheres to the weeds because the herbicide contains the contact repellent. For example, if a flying insect pest mosquito tries to stay on the weed and comes into contact with the weed, the body will come into contact with the contact repellent, thereby providing a repellent effect against the flying insect.

  In addition, since contact repellents are agents that are less likely to evaporate than space repellents, they remain attached to weeds that have withered over a long period of time, not only against moth pests that have contacted the weeds, but also against flying pests. A repellent effect is obtained.

  A third invention is characterized in that, in the second invention, it contains a spatial repellent having a higher vapor pressure than the contact repellent.

  According to this configuration, when the herbicide is attached to the weeds, the space repellent is easily evaporated, so that the space repellent evaporates around the weeds and a pest repellent effect is obtained in a wide range.

  According to a fourth invention, in any one of the first to third inventions, pelargonic acid is contained.

  According to this configuration, since pelargonic acid is contained, the immediate effect of weeding is further enhanced, and the time until the weeds wither and hang down is shortened.

  A fifth invention is characterized in that, in the fourth invention, emulsified pelargonic acid is contained.

  According to this configuration, since the herbicide is emulsified with pelargonic acid, the herbicidal effect of pelargonic acid compared to the herbicide in which the salt of pelargonic acid is dissolved, that is, penetrates from the surface of the weed foliage and penetrates intracellularly. The herbicidal effect appears quickly by lowering the pH and destroying the cells. Therefore, the time until the weeds wither and hang down is further shortened.

  According to the first invention, since the pest repellent is contained in the immediate herbicide, the repellent effect on the moth pest can be made to appear in a short time after the treatment.

  According to 2nd invention, the repellent effect of a pest can be maintained over a long period of time.

  According to 3rd invention, since the space repellent is contained, the repellent effect of a pest can be acquired in a wide range.

  According to the fourth and fifth inventions, the immediate effect of weeding is further enhanced, so that the operational effects of the first invention become even more remarkable.

  Hereinafter, embodiments of the present invention will be described in detail. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  The herbicide according to the embodiment of the present invention is a liquid drug containing at least a contact repellent that exhibits a repellent effect by contact with a pest, a spatial repellent, pelargonic acid, and glyphosate. Contact repellents and space repellents are pest repellent components. Pelargonic acid and glyphosate are herbicidal ingredients and are used to kill plants such as plants and weeds. Further, the herbicide may contain water for diluting each component, or may contain a surfactant, a solvent, and the like.

The contact repellent is a hardly transpirational insect repellent having a vapor pressure at 25 ° C. of less than 1.0 × 10 ⁻⁵ mmHg, preferably a vapor pressure at 25 ° C. of less than 1.0 × 10 ⁻⁶ mmHg. Is a pest repellent. As the contact repellent, for example, a pyrethroid type or organic phosphorus type pest repellent is preferably used. Examples of pyrethroid pest repellents for contact repellents include tralomethrin, bifenthrin, permethrin, phenothrin, cypermethrin, ciphenothrin, cyfluthrin, phthalthrin, resmethrin, etofenprox, acrinathrin, and silafluophene. Examples of organophosphorus pest repellents for contact repellents include chlorpyrifos, propetanephos, fenitrothion, pyridafenthion, fipronil, dinotefuran, imidacloprid, chlorfenapyr, thiamethoxam, clothianidin, indoxacarb, ethiprole, etc. . Moreover, what microcapsulated these etc. are used. Of these, tralomethrin, bifenthrin, fipronil, dinotefuran, and imidacloprid are preferably used. Moreover, only 1 type can also be used among these, and arbitrary 2 or more types can also be mixed and used.

The space repellent is a readily transpirational insect repellent having a vapor pressure of 1.0 × 10 ⁻⁵ mmHg or higher at 25 ° C., preferably, a vapor pressure of 25 × 10 ⁻⁴ mmHg or higher. Is a pest repellent. As the space repellent, for example, a pyrethroid-based pest repellent is preferably used. Examples of pyrethroid pest repellents for space repellents include empentrin, transfluthrin, metfurthrin, profluthrin, terrareslin, and the like. Moreover, only 1 type can also be used among these, and arbitrary 2 or more types can also be mixed and used.

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

  In this embodiment, since the herbicide is obtained by emulsifying pelargonic acid, the herbicidal effect of pelargonic acid compared to the herbicide in which the salt of pelargonic acid is dissolved, that is, the cells permeate from the surface of the foliage of weeds as plants. The herbicidal effect is quickly manifested by lowering the pH inside and destroying the cells. Therefore, the time until the weeds wither and hang down is further shortened.

  When the content of pelargonic acid is less than 2.0% by weight or more, the time until weeds wither becomes longer, and the immediate effect decreases. On the other hand, when the content of pelargonic acid is 2.0% by weight or more, the user However, it is possible to obtain a herbicidal effect high enough to realize the immediate effect. When the content of pelargonic acid is 2.5% by weight or more, a higher herbicidal effect can be obtained, and more preferably 3.0% by weight or more.

  Moreover, you may contain at least 1 among pelargonic acid, an acetic acid, and d-limonene as a quick-acting herbicide. Even when only acetic acid or only d-limonene is contained as an immediate-acting herbicide, the herbicidal effect appears quickly.

  Glyphosate penetrates from the plant foliage and is transported throughout the plant body to inhibit amino acid synthesis, thereby killing the whole plant.It shows a slower herbicidal effect than pelargonic acid, but the root of the plant It is superior to pelargonic acid in that it can withstand up to

  The content of glyphosate is set to 0.5% by weight or more, and preferably 1.0% by weight or more. The upper limit value of the glyphosate content is preferably set to 2.0% by weight, for example. This is because the herbicidal effect of glyphosate is not so high even when the content of glyphosate is 2.0% by weight or more.

  When the content of glyphosate is less than 0.5% by weight, depending on the type of weed, the time until the roots are surely withered becomes longer. On the other hand, when the content of glyphosate is 0.5% by weight or more A high herbicidal effect can be obtained over a long period of time on the weeds.

  Since the herbicide is a liquid, it can be attached to the weeds by, for example, spraying from above the weeds. The herbicide can be commercialized by storing it in a container that is easy to spread, for example, a resin container having a capacity of about 1000 ml to 2000 ml. A spray nozzle or a shower nozzle with a built-in pump mechanism can be attached to the container.

  Further, the herbicide can be contained in an aerosol can together with a propellant to form an aerosol product. Examples of the propellant include LPG (liquefied petroleum gas).

  Next, the effect of the herbicide will be described separately for the herbicidal effect and the pest repellent effect. First, the immediate effect, transferability, and sustainability will be described based on test results as herbicidal effects. In the test for immediate effect, as test plants (weeds), cypress (Coleoptera perennial weeds), mugwort (Asteraceae perennial weeds) and barbet (Gramineae annual weeds) were used. In the test method, weed leaves were cut out from leaf branches, arranged on a water-absorbing white paper, sprayed with a test agent so that the entire leaf was firmly wet, and the elapsed time from the start of spraying was measured. The state of the leaves was observed when 5 minutes passed, 10 minutes passed, 20 minutes passed, 30 minutes passed, 40 minutes passed, 60 minutes passed, 90 minutes passed, and 120 minutes passed after the start.

  The test agent was a herbicide (Example 1) containing 3.0% by weight of emulsified pelargonic acid, a contact repellent, a space repellent, and 1.0% by weight of glyphosate as the herbicide of the Example. .

  When the herbicide of Example 1 was sprayed on the birch, the leaf began to brown after 5 minutes from the start of spraying, and 100% of the leaf was browned or shrunken after 30 minutes. That is, it is understood that immediate effect is high. In addition, when the herbicide of Example 1 was sprayed on mugwort, the leaves began to brown after 30 minutes from the start of spraying, and 90% or more of the leaves were browned or shrunken after 120 minutes. In addition, when the herbicide of Example 1 was sprayed on the bark beetle, the leaf began to brown 30 minutes after the start of spraying, and 100% of the leaf was browned or shrunken after 90 minutes.

  In the test regarding the migratory property, a cattle planted in a pot was prepared as a test plant (weed). In the test method, the test agent was applied to 50% of the leaves, and the elapsed time from the start of application was measured, and 1 day, 2 days, 3 days, and 7 days had elapsed since the start of application. The manner in which the honeybee withered was observed.

  The test agent prepared the herbicide of the said Example 1, and the herbicide of the comparative example 1 which does not contain pelargonic acid but contained glyphosate (1.0 weight% of glyphosate) was prepared.

  When the herbicide of Example 1 was sprayed on the birch planted in the pot, most of them died after 3 days from the start of spraying, and the whole withered after 7 days. That is, it can be seen that the herbicide has a high transferability to the roots and can withstand the roots. On the other hand, when the herbicide of Comparative Example 1 was sprayed on the birch planted in the pot, at the time when 3 days passed, there were few withered parts compared with Example 1, but when 7 days passed, the whole withered.

  In the test for sustainability, a place where weeds with a plant height of about 20 cm were growing outdoors was selected, and a 30 cm square was prepared as a test plot, and before shooting the herbicide (before treatment) was recorded and recorded. After the treatment, one day, two days, three days, seven days, two weeks, two weeks, and three weeks were photographed and recorded, and compared with the test group before treatment.

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

  When treated with the herbicide of Example 1, almost all of the weeds in the test area withered after one day and almost no new weeds had grown even after three weeks. That is, it can be seen that the herbicidal effect lasts for a long period of at least 3 weeks. On the other hand, when treated with the herbicide of Comparative Example 2, the weeds in the test area were hardly withered even after 1 day, and some weeds were not withered after 3 days. After 1 week, almost all the weeds in the test area were withered and maintained until 3 weeks passed.

  Next, the pest repellent effect will be described. The pest repellent effect will be described mainly based on the test results for the repellent effect of the moth pest and the repellent effect of the flying pest. Regarding the repellent effect of moth pests, choose a place where weeds with a height of about 30 cm grows outdoors, prepare a 30 cm square as a test area, , Terrestrial shellfish, beetles), and spray each test agent. Before spraying, 11 ants, 2 dandelion, 10 ants, 10 spiders, and 1 beetle were confirmed.

  Scattering was performed on a 200 cm square centering on the test area. Immediately after spraying, 3 days, 7 days, 21 days, 33 days, and 42 days passed, the number of the above-mentioned pests was counted.

  Example 2 was a herbicide containing 3.0% by weight of emulsified pelargonic acid, tralomethrin as a contact repellent, transfluthrin as a spatial repellent, and 1.0% by weight of glyphosate. In Example 2, it is prepared so that the content of tralomethrin is 0.0091% by weight. Example 3 contains all the components of Example 2 and is prepared so that the content of tralomethrin is 0.0182% by weight. Example 4 contains all the ingredients of Example 2 and is prepared so that the tralomethrin content is 0.0303 wt%. Example 5 contains all the components of Example 2 and is prepared so that the content of tralomethrin is 0.0910% by weight. As Comparative Example 3, a general pest repellent (transfluthrin) was prepared.

The amount of treatment was approximately uniform so as to be 100 ml / m ² . With this treatment amount, in Example 2, tralomethrin was applied at a dose of 9 mg / m ² , in Example 3, tralomethrin was applied at an amount of 18 mg / m ² , and in Example 4, tralomethrin was applied at 30 mg / m ² . Further, in Example 5, tralomethrin has an application amount of 91 mg / m ² .

  When the herbicides of Examples 2 to 5 were sprayed, the number of moth pests was 0 until 7 days after the spraying. In Example 2, when 21 days passed after spraying, several ants were confirmed, but other worms were not confirmed. In Example 3, the number of moth pests was 0 even after 21 days had passed since spraying. After 33 days, several ants and beetles were confirmed, but no other worms were confirmed. In Example 4, after 21 days after spraying, several rubber bugs were confirmed, but no other insect pests were confirmed. In Example 5, the number of moth pests was 0 even after 21 days had passed since spraying. After 33 days, several spiders and terrestrial shellfish were confirmed, but no other insect pests were confirmed. Therefore, in Examples 2-5, it turns out that the repellent effect of a pest insect persists over a long period of time.

  On the other hand, in the case of Comparative Example 3, the number of worm pests was 0 immediately after spraying, but 8 ants were confirmed after 3 days, 11 ants were confirmed, 7 rubber snails and several peas were confirmed after 7 days. It was done. After 21 days, nearly 40 ants were confirmed.

Next, the repellent effect of flying pests will be described. The repellent effect of flying insects was conducted by the human cage method in the outdoors where Aedes albopictus (flying insects) occurred. The tester stood in the center of the test area with both arms exposed, counted the number of human striped mosquitoes trying to suck blood, and captured the striped mosquitoes with a flukes. The test area is a grassy area measuring 4.5 m square, and three places were prepared. The test time is 10 minutes each. The test agent contains all the components of Example 2 as Example 6, and when sprayed substantially uniformly so as to be 100 ml / m ² , tralomethrin was applied in an amount of 18 mg / m ² , and transfluthrin The amount of each component is set so that the spray amount is 8 mg / m ² .

Substantially uniformly sprayed to 1 hour elapsed herbicides to each test group so as to 100 ml / m ² Example 6, 2 hour, 3 hour, 6 h, 9 hour, after one day, The number of Aedes albopictus captured after 7 days was counted. Then, only 9 animals were captured at 9 hours, and the others were 0. In other words, it can be seen that the repellent effect persists over a long period of time against flying insects. It is speculated that a similar repellent effect can be obtained against flying insects other than human striped mosquitoes.

  Next, the test results of the insecticidal effect of the herbicide will be described. The insects used in the insecticidal test are red ants and dandelion. The test agent is Example 6. Then, the test insect was placed in a petri dish with filter paper and 1 ml of the test agent was sprayed onto the test insect by hand spray. After spraying, the time until the test insect was knocked down (a state in which it was astonished or unable to move) was measured. In the case of the red ants, the KT50 was about 3 minutes and 40 seconds, and in the case of Dangola, the KT50 was about 4 minutes and 10 seconds. That is, it can be seen that an excellent insecticidal effect against moth pests can be obtained.

As described above, in this embodiment, since the herbicide contains the contact repellent, the pest repellent effect can be maintained over a long period of time. In addition, by using a non-transpiration pest repellent whose vapor pressure at 25 ° C. is less than 1.0 × 10 ⁻⁵ mmHg, the duration of the repellent effect against flying pests and moth pests is made longer. Can do.

  Moreover, since the weeding effect by pelargonic acid appears quickly, it becomes easy for the weeds to hang down. When the weeds hang down, the contact repellent adhering to the weeds approaches or adheres to the ground. Thereby, a repellent effect is acquired also with respect to insect pests, such as an ant and a rubber bug. In particular, when weeds hang down near the nest, a high repellent effect can be obtained in a short time against pests entering and exiting the nest.

  In addition, since it is a herbicide in which pelargonic acid is emulsified, the herbicidal effect of pelargonic acid compared to the herbicide in which the salt of pelargonic acid is dissolved, that is, it penetrates from the foliage surface of weeds and lowers the intracellular pH. The herbicidal effect appears quickly by destroying the cells. Therefore, the time until the weeds wither and hang down is further shortened.

  Moreover, since the said herbicide contains a contact repellent, the insect repellent method which makes a contact repellent adhere to a plant can be performed by spraying a herbicide. Moreover, since the space repellent also adheres to a weed, it becomes a holding body holding a contact repellent and a space repellent. For example, when a flying insect pest mosquito tries to stay on the weed and comes into contact with the weed, the body comes into contact with the contact repellent, thereby obtaining a repellent effect. Moreover, when a contact repellent adheres to weeds with a low height, a repellent effect is also obtained against worms such as ants and cormorants. In addition, since the contact repellent adheres to the weeds that grow near the nest, a high repellent effect can be obtained against pests that enter and exit the nest. Furthermore, since contact repellents are agents that are less likely to evaporate than space repellents, they continue to adhere to weeds over a long period of time, and a repellent effect is obtained against flying insects and moth pests that have contacted the weeds . The contact repellent can be attached to various plants.

  In addition, since the space repellent is easy to evaporate, the space repellent is evaporated around the weeds, and the repellent effect of pests can be obtained in a wide range.

  The above-described embodiment is merely an example in all respects and should not be interpreted in a limited manner. Further, all modifications and changes belonging to the equivalent scope of the claims are within the scope of the present invention.

  The herbicide according to the present invention can be used for, for example, the grass inhabited by pests.

Claims (5)

  A herbicide characterized by containing at least one of pelargonic acid, acetic acid and d-limonene and a pest repellent. The herbicide according to claim 1,
The herbicide, wherein the pest repellent is a contact repellent that exhibits a repellent effect by contact with pests. The herbicide according to claim 2,
A herbicide characterized by containing a space repellent having a higher vapor pressure than the contact repellent. In the herbicide according to any one of claims 1 to 3,
A herbicide characterized by containing pelargonic acid. The herbicide according to claim 4,
A herbicide characterized by containing emulsified pelargonic acid.