JP7249566B2 - herbicide - Google Patents

Description

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

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

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

US Pat. No. 5,300,000 discloses a herbicide comprising a 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, a glyphosate salt, promethrin, and cyanazine.

Japanese Patent No. 2588350 Japanese Patent No. 4266388 JP 2014-91739 A Japanese Patent No. 4853697

By the way, as described above, there are herbicides in which a salt of pelargonic acid is dissolved, but there is a demand to further improve the immediate effect of weeding by pelargonic acid. In particular, users often attach great importance to whether or not the herbicide is effective immediately after spraying the herbicide on weeds.

The present invention has been made in view of this point, and its object is to further enhance the immediate effect of weeding with an oil-based herbicide when the herbicide contains an oil-based herbicide.

In order to achieve the above object, the present invention incorporates an emulsified oily herbicide.

A first invention is a herbicide containing an emulsified oil-based herbicide, which contains 0.5% by weight or more of glyphosate, the oil-based herbicide is pelargonic acid, and 2.0% by weight or more of the above-mentioned A large number of hydrophilic nanoparticles containing pelargonic acid and formed by amphipathic substances that spontaneously form closed endoplasmic reticulum adhere to the surface of the pelargonic acid particles, and the pelargonic acid is dispersed in the aqueous liquid. It is characterized by being emulsified and dispersed.

According to this constitution, since the herbicide is an emulsified oil-based herbicide, the weeding effect of the oil-based herbicide appears more quickly than, for example, a herbicide in which a salt of pelargonic acid is dissolved.

In addition, the herbicidal effect of pelargonic acid, that is, the herbicidal effect is quickly exhibited by penetrating from the foliage surface of weeds, lowering the intracellular pH, and destroying the cells.

In addition, while the emulsified oil-based herbicide damages the weeds, the glyphosate also damages the entire weeds, further enhancing the herbicidal effect.

In addition, since the emulsified oil-based herbicide has a high immediate weeding effect, even if the glyphosate content is lower than that of the oil-based herbicide, a high herbicidal effect can be obtained as a whole herbicide.

In addition, the immediate effect of weeding is sufficiently enhanced.

In addition, even the roots of weeds are withered, and the herbicidal effect lasts for a long period of time.

Further, in any one of inventions 1 to 6, a large number of single-particle biopolymers adhere to the particle surfaces of the oil-based herbicide to emulsify and disperse the oil-based herbicide in the aqueous liquid. It may be a feature.

In addition, by emulsifying oil-based herbicides using hydrophilic nanoparticles or single-particulate biopolymers, it is possible to further improve emulsion stability when water-based active ingredients (e.g., glyphosate (salt)) are present. Therefore, the aqueous active ingredient and the oily pest control ingredient and/or oily herbicide can coexist more stably.

According to the first invention, since the herbicide is obtained by emulsifying the oil-based herbicide, the immediate effect of weeding by the oil-based herbicide can be further enhanced.

In addition, the immediate effect of weeding by pelargonic acid can be further enhanced.

Moreover, since it contains glyphosate, the herbicidal effect can be further enhanced.

Moreover, even if the content of glyphosate is less than the content of the oil-based herbicide, a high herbicidal effect can be obtained.

In addition, since the oil-based herbicide is contained in an amount of 2.0% by weight or more, the immediate effect of weeding can be sufficiently enhanced.

Moreover, since it contains 0.5% by weight or more of glyphosate, the herbicidal effect can be maintained for a long period of time.

In addition, since the herbicide adheres to weeds in the form of particles, the herbicidal effect can be further enhanced.

It is a graph which shows a herbicidal effect.

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

The herbicide according to the embodiment of the present invention is a liquid agent containing at least a contact repellent that exerts a repellent effect upon contact with pests, a space repellent, pelargonic acid as an oily herbicide, and glyphosate. is. Contact repellents and spatial repellents are pest repellent ingredients. Pelargonic acid and glyphosate are herbicidal ingredients and are intended to kill plants such as vegetation and weeds. Moreover, the herbicide may contain water for diluting each component, or may contain a surfactant, a solvent, and the like.

The contact repellent is a non-transpirationable pest repellent having a vapor pressure of less than 1.0×10 ⁻⁵ mmHg at 25° C., preferably less than 1.0×10 ⁻⁶ mmHg at 25° C. is a pest repellent. As the contact repellent, for example, pyrethroid and organic phosphorus pest repellents are preferably used. Pyrethroid pest repellents for contact repellents include, for example, tralomethrin, bifenthrin, permethrin, phenothrin, cypermethrin, cyphenothrin, cyfluthrin, phthalthrin, resmethrin, etofenprox, acrinathrin, and silafluofen. Examples of organic phosphorus pest repellents for contact repellents include chlorpyrifos, propetamphos, fenitrothion, pyridafenthion, fipronil, dinotefuran, imidacloprid, chlorfenapyr, thiamethoxam, clothianidin, indoxacarb, and ethiprole. . In addition, those obtained by microencapsulating these are also used. Among these, it is preferable to use tralomethrin, bifenthrin, fipronil, dinotefuran, and imidacloprid. Moreover, among these, only 1 type can also be used and arbitrary 2 or more types can also be mixed and used.

The spatial repellent is an easily transpirationable pest repellent having a vapor pressure of 1.0×10 ⁻⁵ mmHg or more at 25° C., preferably 1.0×10 ⁻⁴ mmHg or more at 25° C. is a pest repellent. As the spatial repellent, for example, a pyrethroid pest repellent is preferably used. Examples of pyrethroid pest repellents for spatial repellents include empenthrin, transfluthrin, metofluthrin, profluthrin, and terarethrin. Moreover, among these, only 1 type can also be used 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, 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 does not increase so much.

In this embodiment, the herbicide is emulsified with pelargonic acid, so the herbicidal effect of pelargonic acid is greater than that of a herbicide in which a salt of pelargonic acid is dissolved. The herbicidal effect is rapid by lowering the internal pH and destroying the cells. Therefore, the time until the weeds wither and droop is further shortened.

If the pelargonic acid content is less than 2.0% by weight or more, the weeds take longer to wither and the immediate effect is reduced. However, it is possible to obtain a high weeding effect so that the immediate effect can be sufficiently felt. A pelargonic acid content of 2.5% by weight or more is preferable because a higher herbicidal effect can be obtained, and the content is more preferably 3.0% by weight or more.

Glyphosate permeates through the stems and leaves of the plant and is then transported throughout the plant body, inhibiting amino acid synthesis, thereby killing the entire plant. It is superior to pelargonic acid in that it can wither up to.

In addition, the content of glyphosate is set to 0.5% by weight or more, preferably 1.0% by weight or more. The upper limit of the content of glyphosate is preferably 2.0% by weight, for example. This is because even if the content of glyphosate is 2.0% by weight or more, the herbicidal effect of glyphosate does not increase so much.

If the glyphosate content is less than 0.5% by weight, depending on the type of weed, the time required for the roots to surely wither will be longer. It is possible to obtain a high herbicidal effect on weeds over a long period of time.

Since the herbicide is a liquid, it can be applied to the weeds, for example, by spraying it from above the weeds. The herbicide can be put into a container that can be easily sprayed, for example, a resin container with a capacity of about 1000 ml to 2000 ml, and can be commercialized. A spray nozzle, shower nozzle, or the like with a built-in pump mechanism can be attached to the container. Alternatively, the container may be a well-known hand spray container.

The herbicide can also be contained in an aerosol can along with the 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 herbicidal effect and pest repellent effect. First, the herbicidal effects of immediate effect, transferability, and persistence will be explained based on the test results. In the rapid-acting test, as test plants (weeds), oxalis (a perennial weed of the Oxalis family), mugwort (a perennial weed of the Asteraceae family) and crabgrass (an annual weed of the Gramineae family) were used. The test method is to cut the leaves of weeds from the leaves and branches, arrange them on white paper with water absorption, spray the test agent so that the entire leaf is completely wet, measure the elapsed time from the start of spraying, and measure the spraying time. After 5 minutes, 10 minutes, 20 minutes, 30 minutes, 40 minutes, 60 minutes, 90 minutes, and 120 minutes from the start, the leaves were observed.

The test formulations were a herbicide containing 3.0% by weight of emulsified pelargonic acid, a contact repellent, a spatial repellent, and 1.0% by weight of glyphosate (Example 1), and pelargon The herbicide of Comparative Example 1 containing no glyphosate by dissolving a salt of an acid (containing 2.5% by weight of pelargonic acid) and the herbicide of Comparative Example 2 containing a salt of pelargonic acid and containing glyphosate ( 2.5% by weight of pelargonic acid and 0.96% by weight of glyphosate) and the herbicide of Comparative Example 3 containing no pelargonic acid and containing glyphosate (containing 0.96% by weight of glyphosate) were prepared. In Example 1, pelargonic acid is emulsified and dispersed in an aqueous liquid using a surfactant. Glyphosate is dissolved in water.

When oxalis was sprayed with the herbicide of Example 1, the leaves began to turn brown 5 minutes after the start of spraying, and 100% of the leaves turned brown or withered after 30 minutes. That is, it can be seen that the immediate effect is high. On the other hand, when the herbicide of Comparative Example 1 was sprayed on Oxalis, only about 30% of the leaves were browned or shriveled even after 30 minutes from the start of spraying, indicating a low immediate effect. Further, when the herbicide of Comparative Example 2 was sprayed on Oxalis, only about 10% of the leaves were browned or withered even after 30 minutes from the start of spraying, indicating that the immediate effect was low. Furthermore, when the herbicide of Comparative Example 3 was sprayed on Oxalis, no browning or atrophy occurred in the leaves even after 120 minutes from the start of spraying, and an immediate effect could not be expected.

When mugwort was sprayed with the herbicide of Example 1, the leaves began to turn brown 30 minutes after the start of spraying, and 90% or more of the leaves turned brown or withered after 120 minutes. On the other hand, when mugwort was sprayed with the herbicide of Comparative Example 1, when it was sprayed with the herbicide of Comparative Example 2, and when it was sprayed with the herbicide of Comparative Example 3, even after 60 minutes from the start of spraying, No browning or atrophy occurred, and immediate effects could not be expected.

When crabgrass was sprayed with the herbicide of Example 1, the leaves began to turn brown 30 minutes after the start of spraying, and 100% of the leaves turned brown or withered after 90 minutes. On the other hand, when crabgrass was sprayed with the herbicide of Comparative Example 1, when it was sprayed with the herbicide of Comparative Example 2, and when it was sprayed with the herbicide of Comparative Example 3, even after 30 minutes from the start of spraying, Almost no browning or atrophy occurred, and immediate effects could not be expected.

In the migration test, oxalis planted in a pot was prepared as a test plant (weed). The test method is to apply the test agent to 50% of the leaves, measure the elapsed time from the start of application, and 1 day, 2 days, 3 days, and 7 days after the start of application. Observations were made on how the oxalis withered.

The test agents were the herbicide of Example 1 above, the herbicide of Comparative Example 4 in which a salt of pelargonic acid was dissolved and did not contain glyphosate (containing 3.0% by weight of pelargonic acid), and no pelargonic acid. , and the glyphosate-containing herbicide of Comparative Example 5 (containing 1.0% by weight of glyphosate) were prepared.

When the herbicide of Example 1 was sprayed on Oxalis planted in a pot, most of the plants withered 3 days after the start of spraying, and all withered after 7 days. In other words, it can be seen that the herbicide has a high transferability to the roots and can kill even the roots. On the other hand, when the herbicide of Comparative Example 4 was sprayed on Oxalis planted in a pot, it hardly withered even after 7 days from the start of spraying. In addition, when the herbicide of Comparative Example 5 was sprayed on Oxalis planted in a pot, the withered portion was smaller than in Example 1 after 3 days, but the whole withered after 7 days.

For the durability test, a place where weeds with a height of about 20 cm were growing outdoors was selected, a 30 cm square area was prepared as a test area, and the area before the herbicide was sprayed (before treatment) was photographed and recorded. 1 day, 2 days, 3 days, 7 days, 2 weeks, and 3 weeks after the treatment were taken and recorded, and compared with the test area before treatment.

As test agents, the herbicide of Example 1, 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 treatment amount was substantially uniform so as to be 100 ml/m ² .

When treated with the herbicide of Example 1, almost all the weeds in the test plot died after one day, and almost no weeds newly grew even after three weeks. In other words, it can be seen that the herbicidal effect persists over a long period of at least 3 weeks. On the other hand, when treated with the herbicide of Comparative Example 1, almost all weeds in the test plot died after 3 days, but new weeds sprouted after 2 weeks, and more weeds increased after 3 weeks. rice field. When treated with the herbicide of Comparative Example 6, almost no weeds in the test plot died even after 1 day, and some weeds remained without dying even after 3 days. After one week, almost all the weeds in the test plot died, and this state was maintained until three weeks had passed.

Next, the pest repelling effect will be explained. Regarding the repelling effect against insect pests, the effect of repelling crawling insects and the effect of repelling flying insects will be mainly explained based on test results. Regarding the effect of repelling creeping pests, a place where weeds with a height of about 30 cm are growing outdoors is selected, a 30 cm square area is prepared as a test area, and mainly creeping pests (ants, pill bugs, woodlice, spiders, etc.) are prepared in the test area. , terrestrial mollusks, beetles) are counted and then each test agent is sprayed. Before spraying, 11 ants, 2 pill bugs, 10 woodlice, 2 spiders and 1 beetle were confirmed.

Spraying was carried out in a 200 cm square around the test area. Immediately after spraying, and after 3, 7, 21, 33 and 42 days, the creeping pests were 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, the content of tralomethrin was adjusted to 0.0091% by weight. Example 3 contains all of the ingredients of Example 2 and is prepared with a tralomethrin content of 0.0182% by weight. Example 4 contains all the ingredients of Example 2 and is prepared with a tralomethrin content of 0.0303% by weight. Example 5 contains all of the ingredients of Example 2 and is prepared with a tralomethrin content of 0.0910% by weight. In addition, as Comparative Example 7, a general pest repellent (transfluthrin) was prepared.

The treatment amount was substantially uniform so as to be 100 ml/m ² . With this treatment amount, Example 2 resulted in a spray rate of 9 mg/m ² of tralomethrin, Example 3 resulted in a spray rate of 18 mg/m ² of tralomethrin, and Example 4 resulted in a spray rate of 30 mg/m ² of tralomethrin. In Example 5, the application amount of tralomethrin is 91 mg/m ² .

When the herbicides of Examples 2 to 5 were sprayed, the number of crawling pests was 0 for 7 days after spraying. In Example 2, 21 days after spraying, a few ants were found, but no other creeping pests were found. In Example 3, the number of crawling pests was 0 even after 21 days from spraying. After 33 days, a few ants and beetles were found, but no other creeping pests were found. In Example 4, 21 days after spraying, several pill bugs were found, but no other creeping pests were found. In Example 5, the number of crawling pests was 0 even after 21 days from spraying. After 33 days, a few spiders and terrestrial mollusks were found, but no other creeping pests were found. Therefore, in Examples 2 to 5, it can be seen that the effect of repelling crawling pests is maintained for a long period of time.

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

Next, the effect of repelling flying pests will be described. Regarding the repelling effect against flying pests, it was carried out by the decoy method outdoors where Aedes albopictus (flying pests) are occurring. The tester stood in the center of the test plot with both arms exposed, counted the number of Aedes albopictus that tried to suck blood, and captured the Aedes albopictus with a fluke tube. The test area was a 4.5m square grassy area, and was prepared at three locations. Test times are 10 minutes each. As Example 6, the test preparation contained all of the components of Example 2, and when it was sprayed substantially uniformly at 100 ml/m ² , the amount of tralomethrin sprayed was 18 mg/m ² , and the amount of transfluthrin was 18 mg/m 2 . The amount of each component was set so that the spray amount was 8 mg/m ² .

1 hour, 2 hours, 3 hours, 6 hours, 9 hours, 1 day after the herbicide of Example 6 was sprayed approximately uniformly on each of the above test plots so as to be 100 ml / m ² , After 7 days, the number of Aedes albopictus captured was counted. Then, after 9 hours had passed, only a few fish were caught, and no other fish were caught. In other words, it can be seen that the effect of repelling flying pests is maintained for a long period of time. It is presumed that there is a similar repellent effect against flying pests other than Aedes albopictus.

Next, the test results of the insecticidal effect of the herbicide will be explained. Test insects for the insecticidal test are mysid ants and pill bugs. Example 6 is the test agent. Then, the test insect was placed in a petri dish lined with filter paper, and 1 ml of the test agent was sprayed on the test insect using a well-known hand spray. After spraying, the time until the test insects were knocked down (a startled state, unable to move) was measured. The KT50 was about 3 minutes and 40 seconds in the case of the reticulum ant, and the KT50 was about 4 minutes and 10 seconds in the case of the pill bug. In other words, it can be seen that an excellent insecticidal effect against creeping pests can be obtained.

As described above, in this embodiment, since the herbicide contains the contact repellent, the pest repelling effect can be maintained for a long period of time. In addition, by using a non-transpirationable pest repellent having a vapor pressure of less than 1.0×10 ⁻⁵ mmHg at 25° C., the duration of the repelling effect against flying pests and creeping pests can be extended for a longer period of time. can be done.

In addition, since the herbicidal effect of pelargonic acid appears quickly, the weeds tend to droop, and the drooping of the weeds causes the contact repellent adhering to the weeds to approach or adhere to the ground. As a result, a repellent effect can be obtained even for crawling pests such as ants and pill bugs. In particular, hanging weeds near the nest provides a high repellent effect in a short period of time against pests that enter and leave the nest.

In addition, since it is a herbicide emulsified with pelargonic acid, compared to a herbicide in which a salt of pelargonic acid is dissolved, the herbicidal effect of pelargonic acid, 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 droop is further shortened.

In addition, since the above herbicide contains a contact repellent, a pest repellent method can be performed in which the contact repellent adheres to plants by spraying the herbicide. In addition, since the spatial repellent also adheres to weeds, the weeds serve as a carrier for retaining the contact repellent and the spatial repellent. For example, when a mosquito, which is a flying pest, comes into contact with weeds in an attempt to stay on the weeds, the body comes into contact with the contact repellent agent, thereby obtaining a repellent effect. In addition, when the contact repellent adheres to short weeds, it is effective in repelling crawling pests such as ants and pill bugs. Also, by adhering the contact repellent to weeds growing near the nest, a high repelling effect can be obtained against pests that enter and leave the nest. Furthermore, since the contact repellent is a chemical that is less likely to evaporate compared to the spatial repellent, it continues to adhere to weeds for a long period of time, and a repelling effect can be obtained against flying and crawling insects that come into contact with the weeds. . Incidentally, the contact repellent can also be attached to various plants.

In addition, since the spatial repellent evaporates easily, the spatial repellent evaporates around the weeds, and a pest repelling effect can be obtained over a wide area.

In addition, a composition in which a large number of hydrophilic nanoparticles adhere to the particle surfaces of an oil-based herbicide (pelargonic acid) by van der Waals force and the oil-based herbicide is emulsified and dispersed in an aqueous liquid (for example, water) is also possible. can. An oil-based pesticide can also be contained. In this case, a large number of hydrophilic nanoparticles are attached to the surface of particles made of an oily liquid in which the oil-based pesticide and the oil-based herbicide are mixed by van der Waals force. can be emulsified and dispersed in an aqueous liquid.

A three-phase structure consisting 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 particles made of an oily liquid. This emulsification method is disclosed in, for example, Japanese Patent No. 3855203 and Japanese Patent Application Laid-Open No. 2016-79107.

That is, hydrophilic nanoparticles are particles that are formed by an amphipathic substance that spontaneously forms closed vesicles and that adhere to the surface of particles 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 formulas described in the above publications. , derivatives of halogen salts of dialkenyl ammonium derivatives, trialkenyl ammonium derivatives, and tetraalkenyl ammonium derivatives.

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

Further, when emulsifying the oil-based herbicide, the oil-based herbicide may be emulsified and dispersed in the aqueous liquid by adhering a large number of single-particle biopolymers to the particle surfaces of the oil-based pesticide. This emulsification method is also disclosed in, for example, Japanese Patent No. 3855203 and Japanese Patent Application Laid-Open No. 2016-79107. In addition, when an oily pesticide is contained, a large number of biopolymers can be attached to the surface of particles composed of an oily liquid in which the oily pesticide and the oily herbicide are mixed, and emulsified and dispersed in the aqueous liquid. can.

The average particle size of the hydrophilic nanoparticles can be from 8 nm to 500 nm. If the average particle size of the hydrophilic nanoparticles is less than 8 nm, the van der Waals force will be reduced, making it difficult for the hydrophilic nanoparticles to adhere to the particle surfaces of the oil-based herbicide. Moreover, when the average particle size of the hydrophilic nanoparticles is larger than 500 nm, it becomes difficult to stabilize emulsification.

Monoparticulate biopolymers include, for example, those produced by microorganisms using some sugars from among monosaccharides such as ribose, xylose, rhamnose, fucose, glucose, mannose, glucuronic acid, and gluconic acid. can be mentioned. Alcaligenes, Xanthomonas, Arthrobacter, Bacillus, Hansenula, Brunaria and the like are known as microbial species that produce polysaccharides with specific structures. A plurality of polysaccharides may be a mixture.

In addition to pelargonic acid, oil-based herbicides include, for example, alachlor, sethoxydim, pretilachlor, and the like, and one or more of these may be used in combination. Alachlor, sethoxydim, pretilachlor, etc. can also be emulsified in the same manner as pelargonic acid.

Next, the pest extermination 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 mysid ant. In Example 7, a large number of hydrophilic nanoparticles were attached to the surface of particles composed of an oily liquid in which transfluthrin, tralomethrin, and pelargonic acid were mixed by van der Waals force, and the oily liquid was emulsified and dispersed in an aqueous liquid. ing. Note that glyphosate is dissolved in the aqueous liquid.

In Table 1, "1 time", "2 times", and "3 times" indicate the number of tests. A glass cylinder with a diameter of about 8 cm was used for the test. The inner surface of the glass cylinder is coated with talc to prevent the test insects from climbing the inner surface. Ten test worms are released into this glass cylinder. Then, one push (about 1.07 g) of each test agent was sprayed from a hand spray container at a distance of 20 cm from the test insect. The time from the completion of injection to the knockdown of each test insect was measured and defined as the knockdown time.

Four minutes after the completion of injection, 4 to 6 fish were knocked down in Example 1, whereas 5 to 6 fish were knocked down in Example 7. In the case of Example 1, the average time required to knock down all the animals was 6 minutes and 36 seconds, whereas in the case of Example 7, the average time required to knock down all the animals was 4 minutes. It was minutes and 40 seconds. That is, according to Example 7, it is found that the knockdown effect on the reticulated ant is enhanced as compared with Example 1. It should be noted that the knockdown of the reticulated ant is a state in which the reticulated ant has stopped moving.

As for the insecticidal effect, both Example 1 and Example 7 had a mortality rate of 100% after 24 hours from the completion of spraying.

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. A glass cylinder with a diameter of about 20 cm was used for the test. One test insect is released into this glass cylinder. Then, one push (about 1.07 g) of each test agent was sprayed from a hand spray container at a distance of 20 cm from the test insect. The elapsed time from the completion of injection was measured, and the time required for knockdown was recorded. Comparing the average time of three times, Example 1 was 24 minutes and 25 seconds, while Example 7 was 17 minutes and 37 seconds. In other words, it can be seen that the knockdown effect against centipedes is enhanced in Example 7 compared to Example 1. Centipede knockdown is a state in which the centipede is frightened and unable to return to its original state by itself.

As for the insecticidal effect, both Example 1 and Example 7 had a mortality rate of 100% after 24 hours from the completion of spraying.

The upper part of Table 3 shows the knockdown effect, and the lower part shows the insecticidal effect. The test insect was a pill 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. A glass cylinder with a diameter of about 8 cm was used for the test. One test insect is released into this glass cylinder. Then, one push (about 1.07 g) of each test agent was sprayed from a hand spray container at a distance of 20 cm from the test insect. The elapsed time from the completion of injection was measured, and the time required for knockdown was recorded. Comparing the average time of three times, Example 1 was 6 minutes and 16 seconds, while Example 7 was 5 minutes and 31 seconds. In other words, it can be seen that the knockdown effect against pill bugs is higher in Example 7 than in Example 1. The knockdown of a pill bug is a state in which the pill bug does not move forward even when a stimulus is applied.

As for the insecticidal effect, both Example 1 and Example 7 had a mortality rate of 100% after 24 hours from the completion of spraying.

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. A glass cylinder with a diameter of about 8 cm was used for the test. One test insect is released into this glass cylinder. Then, one push (about 1.07 g) of each test agent was sprayed from a hand spray container at a distance of 20 cm from the test insect. The elapsed time from the completion of injection was measured, and the time required for knockdown was recorded. Comparing the average time of three times, Example 1 was 5 minutes and 17 seconds, while Example 7 was 3 minutes and 39 seconds. In other words, it can be seen that the knockdown effect against slugs is higher in Example 7 than in Example 1. A slug knockdown is a state in which the slug loses its agile reaction even when a stimulus is applied.

Next, the weeding effect of Examples 1 and 7 will be described with reference to 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 formulations were sprayed onto oxalis leaves using a hand sprayer. The amount of spraying at that time was 1 push (about 1.07 g) per leaf of Oxalis. Also, the distance between the leaf and the spray port was set to 10 cm. In FIG. 1, the rate of withered grass is a value (average value of 5 leaves) obtained by calculating the ratio of a portion discolored to brown (withered portion) to the entire leaf for each leaf as a percentage.

As is clear from the graph, in Example 7, about 90% dead grass rate can be obtained after about 2 minutes from spraying. In other words, the emulsifying and dispersing method of Example 7 is extremely effective in weeding.

In addition, for example, alachlor, sethoxydim, pretilachlor, etc. can also exhibit similar effects.

The above-described embodiments are merely examples in all respects and should not be construed in a restrictive manner. Furthermore, all modifications and changes within the equivalent range of claims are within the scope of the present invention.

The herbicide according to the present invention can be used, for example, on grassy areas inhabited by insect pests.

Claims (1)

In a herbicide containing an emulsified oily herbicide,
Contains 0.5% by weight or more of glyphosate,
the oleaginous herbicide is pelargonic acid,
It contains 2.0% by weight or more of the pelargonic acid,
A large number of hydrophilic nanoparticles formed by amphipathic substances that spontaneously form closed endoplasmic reticulum are attached to the surface of the pelargonic acid particles, and the pelargonic acid is emulsified and dispersed in the aqueous liquid. herbicide.

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