JP2018062498A - Herbicide - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further enhance immediate effectivity of weeding using pelargonic acid, when a herbicide contains the pelargonic acid.SOLUTION: A herbicide contains an emulsified oily herbicide.SELECTED DRAWING: None

Description

  The present invention relates to a herbicide for removing weeds, for example, and belongs to the technical field of containing an oily herbicide such as pelargonic acid.

  Conventionally, herbicides containing pelargonic acid as oily herbicides are known. Patent Document 1 discloses a herbicide comprising glyphosate or a salt thereof and an effective amount of a fatty acid salt active ingredient including caprylate, pelargonate, caprate or laurate, respectively.

  Patent Document 2 discloses a herbicide containing N-phosphonomethylglycine or a salt thereof and a fatty acid containing pelargonic acid or a salt thereof.

  Patent Document 3 discloses a herbicide containing glyphosate salt, an organic base salt of pelargonic acid, and an ammonium salt of an inorganic acid such as ammonium chloride.

  Patent Document 4 discloses a herbicide containing pelargonic acid, glyphosate salt, promethrin, and cyanazine.

Japanese Patent No. 2588350 Japanese Patent No. 4266388 JP 2014-91739 A Japanese Patent No. 4,8536,977

  By the way, there is a herbicide in which a salt of pelargonic acid is dissolved as described above, but there is a demand for further improving the immediate effect of herbicidal treatment with pelargonic acid. In particular, users often place importance on whether or not a herbicidal effect can be obtained immediately after spraying a herbicide on weeds.

  This invention is made | formed in view of this point, The place made into the objective is to further improve the immediate effect of the herbicidal by an oily herbicide, when an oily herbicide is included in a herbicide.

  In order to achieve the above object, in the present invention, an emulsified oily herbicide is contained.

  1st invention contains the emulsified oily herbicide, It is characterized by the above-mentioned.

  According to this configuration, since the herbicide is obtained by emulsifying the oily herbicide, for example, the herbicidal effect of the oily herbicide appears more quickly than the herbicide in which the salt of pelargonic acid is dissolved.

  The second invention is characterized in that in the first invention, emulsified pelargonic acid is contained.

  According to this structure, the herbicidal effect by pelargonic acid, that is, the herbicidal effect quickly appears by penetrating from the surface of the weed foliage and lowering the intracellular pH to destroy the cell.

  A third invention is characterized in that in the first or second invention, glyphosate is contained.

  According to this configuration, the herbicidal effect is further enhanced by damaging the weeds with glyphosate while damaging the weeds with the emulsified oily herbicide.

  The fourth invention is characterized in that, in the third invention, the content of the oily herbicide is larger than the content of glyphosate.

  That is, since the immediate effect of the herbicidal action by the emulsified oily herbicide is high, even if the glyphosate content is less than that of the oily herbicide, a high herbicidal effect can be obtained as a whole herbicide.

  A fifth invention is characterized in that in any one of the first to third inventions, 2.0% by weight or more of an oily herbicide is contained.

  According to this configuration, the immediate effect of weeding is sufficiently enhanced.

  The sixth invention is characterized in that in the third invention, 0.5% by weight or more of glyphosate is contained.

  According to this configuration, the roots of the weeds are withered and the herbicidal effect is sustained over a long period of time.

  According to a seventh invention, in any one of the first to sixth inventions, a number of hydrophilic nanoparticles are attached to the particle surface of the oily herbicide and the oily herbicide is emulsified and dispersed in an aqueous liquid. It is characterized by.

  According to an eighth invention, in any one of the first to sixth inventions, a large number of monopolymerized biopolymers adhere to the particle surface of an oily herbicide, and the oily herbicide is emulsified and dispersed in an aqueous liquid. It is characterized by.

  In addition, by emulsifying oily herbicides using hydrophilic nanoparticles or single-particle biopolymers, the emulsion stability when an aqueous active ingredient (eg glyphosate (salt)) is present is further improved. Therefore, the aqueous active ingredient and the oily pest control ingredient and / or the oily herbicide can coexist more stably.

  According to 1st invention, since it becomes the herbicide which emulsified the oil-based herbicide, the immediate effect of the herbicide by an oil-based herbicide can further be improved.

  According to 2nd invention, the immediate effect of the weeding by pelargonic acid can further be improved.

  According to the third invention, since glyphosate is contained, the herbicidal effect can be further enhanced.

  According to the fourth invention, a high herbicidal effect can be obtained even if the content of glyphosate is less than the content of the oily herbicide.

  According to 5th invention, since the oil-based herbicide is contained 2.0weight% or more, the immediate effect of a herbicidal can fully be improved.

  According to the sixth invention, since the glyphosate is contained in an amount of 0.5% by weight or more, the herbicidal effect can be maintained over a long period of time.

  According to the seventh and eighth inventions, the herbicide adheres to the weeds in the form of particles, so that the herbicidal effect can be further enhanced.

It is a graph which shows the weeding effect.

  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 an embodiment of the present invention is a liquid drug containing at least a contact repellent that exhibits a repellent effect by contact with pests, a spatial repellent, pelargonic acid as an oily herbicide, and glyphosate It is. 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. 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.

  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. The container may be a well-known hand spray 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 a herbicide in the examples, and pelargon. The herbicide of Comparative Example 1 (containing 2.5% by weight of pelargonic acid) in which an acid salt is dissolved and does not contain glyphosate, and the herbicide of Comparative Example 2 in which a salt of pelargonic acid is dissolved and glyphosate is contained ( Pelargonic acid 2.5% by weight, glyphosate 0.96% by weight) and herbicide of Comparative Example 3 containing glyphosate without geraphosate (glyphosate 0.96% by weight) were prepared. In Example 1, pelargonic acid is emulsified and dispersed in an aqueous liquid by a surfactant. Glyphosate is dissolved in water.

  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. On the other hand, when the herbicide of Comparative Example 1 was sprayed on the birch, only about 30% of the leaves were browned or atrophy even after 30 minutes from the start of spraying, and the immediate effect was low. Further, when the herbicide of Comparative Example 2 was sprayed on the birch, only about 10% of the leaves were browned or atrophy even after 30 minutes from the start of spraying, and the immediate effect was low. Further, when the herbicide of Comparative Example 3 was sprayed on the birch, no browning or atrophy occurred in the leaves even after 120 minutes from the start of spraying, and no immediate effect could be expected.

  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. On the other hand, when the herbicide of Comparative Example 1 is sprayed on mugwort, when the herbicide of Comparative Example 2 is sprayed, or when the herbicide of Comparative Example 3 is sprayed, even if 60 minutes have elapsed since the start of spraying, No browning or atrophy occurred, and no immediate effect could be expected.

  When the herbicide of Example 1 was sprayed on the bark beetle, the leaf began to brown after 30 minutes from the start of spraying, and 100% of the leaf was browned or shrunken after 90 minutes. On the other hand, when the herbicide of Comparative Example 1 is sprayed on the bark beetle, when the herbicide of Comparative Example 2 is sprayed, or when the herbicide of Comparative Example 3 is sprayed, even if 30 minutes have elapsed since the start of spraying, Almost no browning or atrophy occurred, and no immediate effect could be expected.

  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 agents were the herbicide of Example 1 above, the herbicide of Comparative Example 4 in which the salt of pelargonic acid was dissolved to contain no glyphosate (containing 3.0% by weight of pelargonic acid), and no pelargonic acid. The herbicide of Comparative Example 5 containing glyphosate (containing 1.0% by 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 4 was sprayed on the birch planted in the pot, it hardly died even after 7 days from the start of spraying. In addition, when the herbicide of Comparative Example 5 was sprayed on the birch planted in the pot, at the time when 3 days passed, there were few parts withered 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 above, the herbicide of Comparative Example 1 and the herbicide of Comparative Example 6 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 1, almost all of the weeds in the test area withered after 3 days, but weeds grew newly after 2 weeks, and weeds increased further after 3 weeks. It was. When treated with the herbicide of Comparative Example 6, almost no weeds in the test area were 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. Moreover, as Comparative Example 7, 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 7, the number of worm pests was 0 immediately after spraying, but 8 ants were confirmed after 3 days, and 11 ants, dandelion, and several warts 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 with a well-known 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.

  In addition, a composition in which a large number of hydrophilic nanoparticles are adhered to the particle surface of an oily herbicide (pelargonic acid) by van der Waals force and the oily herbicide is emulsified and dispersed in an aqueous liquid (for example, water) may be used. it can. It is also possible to contain an oily pest control agent. In this case, a large number of hydrophilic nanoparticles are adhered to the surface of the particle consisting of an oily liquid in which an oily pesticide and an oily herbicide are mixed by van der Waals force. And emulsified and dispersed in an aqueous liquid.

  A three-phase structure of an oil phase, an emulsifier phase, and an aqueous phase is formed by attaching a large number of hydrophilic nanoparticles (emulsifier) to the surface of the particle made of an oil liquid. This emulsification method is disclosed in, for example, Japanese Patent No. 3855203 and Japanese Patent Laid-Open No. 2006-79107.

  That is, the hydrophilic nanoparticle is a particle that is formed by an amphiphilic substance that spontaneously forms a closed vesicle (vesicle) and adheres to the particle surface made of an oily liquid. Examples of amphiphilic substances that form hydrophilic nanoparticles include polyoxyethylene hydrogenated castor oil derivatives, dialkylammonium derivatives, trialkylammonium derivatives, and tetraalkylammonium derivatives represented by the general formula described in the above publication. , Dialkenyl ammonium derivatives, trialkenyl ammonium derivatives, tetraalkenyl ammonium derivative halogen salt derivatives, and the like.

  Examples of amphiphilic substances that form hydrophilic nanoparticles include phospholipids and phospholipid derivatives. Examples of phospholipids include egg yolk lecithin and soybean lecithin.

  When emulsifying the oily herbicide, the oily herbicide may be emulsified and dispersed in an aqueous liquid by attaching a large number of single-particle biopolymers to the particle surface of the oily pesticide. This emulsification method is also disclosed in, for example, Japanese Patent No. 3855203 and Japanese Patent Application Laid-Open No. 2006-79107. In addition, when an oily pest control agent is contained, a large number of biopolymers may be attached to the surface of the particle composed of an oily liquid in which an oily pesticide and an oily herbicide are mixed and emulsified and dispersed in an aqueous liquid. it can.

  The average particle diameter of the hydrophilic nanoparticles can be 8 nm to 500 nm. When the average particle diameter of the hydrophilic nanoparticles is smaller than 8 nm, the van der Waals force is reduced, and the hydrophilic nanoparticles are less likely to adhere to the particle surface of the oily herbicide. Moreover, when the average particle diameter of hydrophilic nanoparticles is larger than 500 nm, emulsification becomes difficult to stabilize.

  Examples of monopolymerized biopolymers include those produced by microorganisms with several sugars as constituents from monosaccharides such as ribose, xylose, rhamnose, fucose, glucose, mannose, glucuronic acid, and gluconic acid. Can be mentioned. As the microbial species that produce polysaccharides of a specific structure, the genus Alkagenes, Xanthomonas, Arthrobacter, Bacillus, Hansenula, Brunaria, etc. are known. A plurality of polysaccharides may be a mixture.

  In addition to pelargonic acid, examples of oily herbicides include alachlor, cetoxydim, pretilachlor, and the like, and one or any of a plurality of them can be used in combination. Aracrol, cetoxydim, pretilachlor and the like can also be emulsified in the same manner as pelargonic acid.

  Next, the pest control effect of Example 7 will be described.

  The upper part of Table 1 shows the knockdown effect, and the lower part shows the insecticidal effect. The test insect is a red ant. In Example 7, a large number of hydrophilic nanoparticles are attached to the surface of a particle composed of an oily liquid in which transfluthrin, tralomethrin and pelargonic acid are mixed by van der Waals force to emulsify and disperse the oily liquid in the aqueous liquid. ing. Glyphosate is dissolved in the aqueous liquid.

  In Table 1, “1 time”, “2 times”, and “3 times” indicate the number of tests. In the test, a glass cylinder having a diameter of about 8 cm was used. The inner surface of this glass cylinder is coated with talc so that the test insect cannot climb the inner surface. Ten test insects are released in the glass cylinder. Each test agent was sprayed from the hand spray container by 1 push (about 1.07 g) from a position 20 cm away from the test insect. The time from the completion of jetting until each test insect was knocked down was measured and used as the knockdown time.

  At the time when 4 minutes have elapsed since the completion of injection, in the case of Example 1, 4 to 6 animals were knocked down, whereas in Example 7, 5 to 6 animals were knocked down. Further, in the case of Example 1, the time required for the total number to knock down was 6 minutes and 36 seconds on average, whereas in Example 7, the time required for the total number to knock down was 4 on average. 40 minutes. That is, according to Example 7, it turns out that the knockdown effect with respect to a shellfish is increasing compared with Example 1. FIG. Here, the knock-down of the ants is a state where the ants do not move.

  Regarding the insecticidal effect, in both Example 1 and Example 7, the lethality after 24 hours from the completion of injection was 100%.

  The upper part of Table 2 shows the knockdown effect, and the lower part shows the insecticidal effect. The test insect is a centipede. The test agents are the same as those in Table 1.

  In Table 2, “1 time”, “2 times”, and “3 times” indicate the number of tests. In the test, a glass cylinder having a diameter of about 20 cm was used. One test insect is released in the glass cylinder. Each test agent was sprayed from the hand spray container by 1 push (about 1.07 g) from a position 20 cm away from the test insect. The elapsed time from the completion of injection was measured and the time required for knocking down was recorded. Compared with the average time of three times, in the case of Example 1, it was 24 minutes and 25 seconds, whereas in Example 7, it was 17 minutes and 37 seconds. That is, according to Example 7, it turns out that the knockdown effect with respect to a centipede is increasing compared with Example 1. FIG. The centipede knockdown is a state in which the centipede is ascended and cannot return to its original state by itself.

  Regarding the insecticidal effect, in both Example 1 and Example 7, the lethality after 24 hours from the completion of injection was 100%.

  The upper part of Table 3 shows the knockdown effect, and the lower part shows the insecticidal effect. The test insect is a rubber bug. The test agents are the same as those in Table 1.

  In Table 3, “1 time”, “2 times”, and “3 times” indicate the number of tests. In the test, a glass cylinder having a diameter of about 8 cm was used. One test insect is released in the glass cylinder. Each test agent was sprayed from the hand spray container by 1 push (about 1.07 g) from a position 20 cm away from the test insect. The elapsed time from the completion of injection was measured and the time required for knocking down was recorded. Compared with the average time of three times, in the case of Example 1, it was 6 minutes and 16 seconds, whereas in Example 7, it was 5 minutes and 31 seconds. That is, according to Example 7, it can be seen that the knock-down effect on the elastic band is higher than that of Example 1. Incidentally, the knock-down of the elastic band is a state in which the elastic band does not advance even if a stimulus is given.

  Regarding the insecticidal effect, in both Example 1 and Example 7, the lethality after 24 hours from the completion of injection was 100%.

  Table 4 shows the knockdown effect when the test insect is a slug. The test agents are the same as those in Table 1.

  In Table 3, “1 time”, “2 times”, and “3 times” indicate the number of tests. In the test, a glass cylinder having a diameter of about 8 cm was used. One test insect is released in the glass cylinder. Each test agent was sprayed from the hand spray container by 1 push (about 1.07 g) from a position 20 cm away from the test insect. The elapsed time from the completion of injection was measured and the time required for knocking down was recorded. Compared with the average time of three times, in the case of Example 1, it was 5 minutes and 17 seconds, whereas in Example 7, it was 3 minutes and 39 seconds. That is, according to Example 7, it can be seen that the knockdown effect on slugs is higher than that of Example 1. The slug knockdown is a state in which the slug no longer responds quickly even when a stimulus is applied.

  Next, the weeding effect of Example 1 and Example 7 is demonstrated based on FIG.

  The test plant is oxalis. The test was conducted indoors. The room temperature during the test was 17.8 ° C., and the humidity was 67%. The test agent was sprayed on the leaves of the birch using a hand spray. The amount of spray at that time was 1 push (about 1.07 g) per leaf of birch. Further, the distance between the leaf and the spray port was 10 cm. In FIG. 1, the hay rate is a value (average value of 5 leaves) calculated as a percentage of the portion of each leaf that has turned brown (withered portion).

  As is apparent from the graph, in Example 7, a hay rate of approximately 90% can be obtained after about 2 minutes have elapsed after spraying. That is, in the emulsifying and dispersing method of Example 7, the immediate effect of weeding is extremely high.

  For example, even if it is alachlor, cetoxydim, pretilachlor, etc., there can exist the same effect.

  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 (8)

  A herbicide characterized by containing an emulsified oily herbicide. The herbicide according to claim 1,
A herbicide characterized by containing emulsified pelargonic acid. The herbicide according to claim 1 or 2,
A herbicide characterized by containing glyphosate. The herbicide according to claim 3,
A herbicide characterized in that the content of oily herbicide is higher than the content of glyphosate. In the herbicide according to any one of claims 1 to 3,
A herbicide characterized by containing 2.0% by weight or more of an oily herbicide. The herbicide according to claim 3,
A herbicide containing 0.5% by weight or more of glyphosate. In the herbicide according to any one of claims 1 to 6,
A herbicide characterized in that a large number of hydrophilic nanoparticles are adhered to the particle surface of an oily herbicide and the oily herbicide is emulsified and dispersed in an aqueous liquid. In the herbicide according to any one of claims 1 to 6,
A herbicide characterized in that a large number of single polymerized biopolymers adhere to the particle surface of an oily herbicide and the oily herbicide is emulsified and dispersed in an aqueous liquid.

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