JP2008069137A - Mixed herbicide made as being absorbed from stem and leaf - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a herbicide technology having a quick onset and residual effectiveness jointly and easily usable. <P>SOLUTION: This herbicide made as being absorbed from stems and leaves is obtained by mixing at least 1 kind of a photosynthesis inhibitory herbicidally active ingredient selected from isouron, karbutilate, diuron, linuron, cyanazine, etc., and at least 1 kind of a plant hormone-based herbicidally active ingredient selected from 2,4-D, MCPA, mecoprop, etc. By mixing these 2 kinds of herbicidally active ingredients having different activities, it is possible to reduce the using amount of the chemicals. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a technique for efficiently controlling harmful plants that grow in agricultural production and living environments.

  Regardless of farmland or non-agricultural land, the growth of weeds causes a decline in agricultural productivity and a deterioration of the living environment, so measures such as physical mowing and chemical killing using chemicals are taken. Herbicides are widely used in terms of labor saving and cost saving. Among them, the photosynthetic inhibitory herbicides, which are absorbed mainly from the roots of weeds by soil treatment and show a herbicidal effect, show herbicidal activity against most plants and at the same time have excellent residual effects, so only on agricultural land It is also used to control strong weeds in non-agricultural land such as parking lots, residential land, and railways.

  Plant hormonal herbicidal active ingredients are called hormonal herbicides because they are absorbed mainly from weeds and leaves and show strong hormonal action. This compound group has been used for a long time in paddy fields, lawns, etc., because it exhibits a selective effect on broad-leaved weeds and horsetails other than Gramineae plants.

  A well-known technique is a weed control method in which the characteristics of the photosynthesis inhibiting herbicidal active ingredient and the plant hormone herbicidal active ingredient are mixed and sprayed. As a product in which both are mixed, for example, isouron 1.0%, mecoprop 3.0% granule (Kusa Hunter granule, Rainbow Chemical Co., Ltd. product), diuron 4.0%, darapon (ISO name dalapon) 10%, Mecoprop 4.0% Granules (Xenon V Granules, Sumika Takeda Horticultural Co., Ltd.), Diuron 20%, Dalapon 35%, 2,4-D Sodium Monohydrate 10% Wettable Powder (Csublanker Hydration) And other products are used as herbicides for non-agricultural land. Bentazone (ISO name bentazone) sodium salt 33.0%, MCPA sodium salt 6.0% solution (Grassine M sodium salt solution, Nissan Chemical Industries, Ltd., Ishihara Sangyo Co., Ltd. product) is used in paddy rice cultivation scenes, etc. ing.

  Conventional herbicides in which a photosynthesis inhibiting herbicidal active ingredient and a phytohormone herbicidal active ingredient are mixed are prepared according to the use scene in consideration of the herbicidal spectrum and action mechanism of each component. The photosynthetic inhibitory herbicidal active ingredient has a broad herbicidal spectrum, but except for bentazone sodium salt, it is prepared as a granule or wettable powder with low water solubility as well as water solubility. Therefore, even if it is a wettable powder, the physical property of the active ingredient which contacts a plant directly is solid, and it was difficult to absorb it efficiently from a foliage part.

  In addition, phytohormonal herbicidal active ingredients are used in many situations as a liquid agent, and when absorbed from the foliage, they exhibit a relatively fast effect, but have a narrow herbicidal spectrum and limited use as a soil treatment agent. It was.

  In addition, it is a well-known fact that when a photosynthetic inhibition herbicidal active ingredient and a phytohormone herbicidal active ingredient are treated simultaneously with soil, an antagonistic phenomenon occurs in which each herbicidal activity is reduced and the effect is delayed. Accordingly, in order to avoid this antagonistic phenomenon, the amount of each active ingredient to be dropped must be increased.

  Moreover, although a granule is easy to use, it tends to cause uneven dispersion. In order to solve this problem, low-concentration and large-scale spraying is required, but there is a problem that raises the price. In addition, wettable powders require labor to prepare a drug, and there is a concern about dust exposure during misuse and dispersion in water. From such a background, there is a demand for a spraying technique that uses less active unevenness and more effectively uses active ingredients.

  The present inventors have clarified that the amount of the active ingredient can be reduced by mixing the photosynthesis inhibiting herbicidal active ingredient and the plant hormone herbicidal active ingredient and absorbing them from the foliage and completed the present invention.

  That is, by mixing photosynthesis inhibiting herbicidal active ingredient and plant hormone herbicidal active ingredient, adhering to 0.06-0.3mm mineral carrier and spraying on the foliage, spraying unevenness is reduced and at the same time the effect is manifested We found that the speed could be increased. Furthermore, spraying a mixture of at least one photosynthesis-inhibiting herbicidal active ingredient and phytohormone herbicidal active ingredient of terbacil, bromacil, and metribuzin that can be adjusted to a stable alkaline aqueous solution on the foliage greatly reduces the amount of active ingredient. I found out.

  The content of the photosynthesis inhibiting herbicidal active ingredient varies depending on the drug, but the fine granule is 0.5 to 3.0%. Moreover, a high concentration dilution liquid agent is 5.0 to 15%, and a direct spraying liquid agent is 0.2 to 1.0%. In addition, the content of one plant hormone herbicidal active ingredient is sufficient to be equal to or less than the content of the photosynthesis inhibiting herbicidal active ingredient.

  The mixed fine granule according to the present invention is prepared by mixing a powdery photosynthesis inhibiting herbicidal active ingredient, a high concentration phytohormone herbicidal active ingredient aqueous solution, and a water-soluble binding aid into a mineral fine particulate carrier while stirring and drying. By doing so, it can be easily manufactured. Pumice, quartz sand, zeolite, marble, etc. can be used as the mineral substance carrier used. Polyvinyl alcohol, starch, surfactant, etc. can be used as a water-soluble binding aid.

  The mixed herbicidal solution according to the present invention is obtained by suspending a photosynthesis inhibiting herbicidal active ingredient and a plant hormone herbicidal active ingredient in water, adding an alkaline substance such as sodium hydroxide, potassium hydroxide, sodium carbonate or the like while stirring, pH Can be adjusted to 9.0-12.5 and easily manufactured.

  As the mixed herbicide, a general surfactant widely used in the production of agricultural chemicals can be used. The surfactant has a function of stabilizing the effect by promoting spreading of the spread active ingredient on the plant body and prompt penetration into the plant body, and is preferably used in combination. In addition, it has a function as a binding aid in the production of fine granules.

  The mixed herbicide according to the present invention is used by mixing a photosynthesis inhibiting herbicidal active ingredient and a phytohormone herbicidal active ingredient, but further herbicidal by mixing other well-known herbicidal active ingredients. It is also possible to increase functionality.

  Mixing the photosynthesis inhibiting herbicidal active ingredient and the phytohormonal herbicidal active ingredient and absorbing them from the foliage reduces the drug dosage.

  Provided is a herbicide that has both rapid and residual effects by mixing a herbicidal spectrum photosynthesis inhibiting herbicidal active ingredient and a plant hormone herbicidal active ingredient having a rapid effect onset.

  Mixing two kinds of herbicidal active ingredients with different activities reduces the risk of drug use error and exposure, and provides a simple and economical herbicidal technique.

Embodiments of the invention will be described based on formulation examples.
(Formulation example 1) Bromasil 1.5%, mecoprop potassium salt 2.5% mixed fine granule 459.8g of zeolite carrier (Zeo Green No. 8, Nippon Zeolite Co., Ltd. product) adjusted to 0.1-0.3mm While rotating at 300 rpm with a mixing stirrer (Mechanomyl MODEL: MM-20N, Okada Seiko Co., Ltd.), 7.7 g of bromacil active ingredient (98%, DuPont Co., Ltd. product), mecoprop potassium salt 50% liquid (MCPP) Liquid, Maruwa Biochemical Co., Ltd. product) 25 g, Dioctylsulfosuccinate 70% (Airroll CT-1L, Toho Chemical Co., Ltd. product) 15 g were added and mixed for 10 minutes. Then, 5 g of white carbon (Carplex XR, Shionogi Pharmaceutical Co., Ltd.) was added and stirred for 1 minute. After drying at 80 ° C. for 3 hours, classification was adjusted with a 0.5 mm sieve.

(Formulation example 2) Turbacil 2.0%, mecoprop-P potassium salt 1.5% mixed fine granules While rotating the zeolite carrier 462.3g adjusted to 0.1-0.3mm 300 minutes per minute with a mixing stirrer, Tarbacil 80% wettable powder (Simbar wettable powder, DuPont Farm Solutions Co., Ltd. product) 10.2 g Turbacil active ingredient, Mecoprop-P potassium salt 50% liquid solution (Scolictech solution, Newham Co., Ltd.) 15 g, Dioctyl 15 g of 70% sulfosuccinate was added and mixed for 10 minutes. Next, 5 g of white carbon was added and stirred for 1 minute. After drying at 80 ° C. for 3 hours, classification was adjusted with a 0.5 mm sieve.

(Formulation Example 3) Bromasil 1.5%, MCPA sodium salt 1.0% mixed fine granules Bromacil while rotating 467.3g of zeolite carrier adjusted to 0.1 to 0.3mm 300 rpm with a mixing stirrer The raw material 7.7g, MCPA sodium salt 19.5% liquid agent (MCP soda salt, Nissan Chemical Industries Co., Ltd. product) 25.7g, surfactant dioctyl sulfosuccinate 70% 15g was added and mixed for 5 minutes. Next, 5 g of white carbon was added and stirred for 1 minute. After drying at 80 ° C. for 3 hours, classification was adjusted with a 0.5 mm sieve.

(Formulation Example 4) Bromasil 2.0%, Mecoprop-P potassium salt 1.5% mixed fine granule While rotating 462.3g of zeolite carrier adjusted to 0.1-0.3mm with a mixing stirrer at 300 rpm, Bromacil active ingredient 10.2 g, mecoprop-P potassium salt 50% solution 15 g, dioctyl sulfosuccinate 70% 15 g were added and mixed for 10 minutes. Next, 5 g of white carbon was added and stirred for 1 minute. After drying at 80 ° C. for 3 hours, classification was adjusted with a 0.5 mm sieve.

(Formulation Example 5) Bromasil 2.0%, metsulfuron methyl 0.01%, MCPA sodium salt 1.0% mixed fine granule 464.8g of zeolite carrier adjusted to 0.1-0.3mm was mixed with a mixing stirrer. Blotasyl active substance 10.2g, metsulfuron methyl 60% wettable powder (Maruwa Saber DF, Maruwa Biochemical Co., Ltd.) suspended in water and adjusted to 2% metsulfuron concentration while rotating 300 minutes 0.5 g, MCPA sodium salt 19.5% solution 25.7 g and dioctyl sulfosuccinate 70% 15 g were added and mixed for 10 minutes. Next, 5 g of white carbon was added and stirred for 1 minute. After drying at 60 ° C. for 3 hours, classification was adjusted with a 0.5 mm sieve.

(Formulation Example 6) Mixed fine granule of dimethenamide 1.2%, bromacil 1.5%, MCPA sodium salt 1.0% A zeolite carrier 459.4 g adjusted to 0.1 to 0.3 mm was mixed with a mixing stirrer every minute. Rotating 300 revolutions, 7.7 g of bromacil active ingredient, 7.6 g of dimethenamide 76% emulsion (Field Star Emulsion, product of BASF Agro Co., Ltd.), 15.7% MCPA sodium salt 25.7 g, dioctyl sulfosuccinate 70% 15 g And mixed for 10 minutes. Next, 5 g of white carbon was added and stirred for 1 minute. After drying at 80 ° C. for 3 hours, classification was adjusted with a 0.5 mm sieve.

(Formulation example 7) Mixed herbicidal solution of bromacil 0.3% and MCPA sodium salt 0.2% Add bromacil active ingredient 3.1 g and MCPA sodium salt 19.5% liquid agent 10.3 g to 900 ml of water, 0.6 g of sodium hydroxide to be 1.2 times mole of the component, 1 g of polyoxyethylene alkyl ether (Neoscore 2339, Toho Chemical Co., Ltd.), and 1 g of dioctyl sulfosuccinate 70% are mixed and dissolved, and water is added. The solution was prepared as 1000 ml.

(Formulation Example 8) Mixed herbicidal solution of 0.6% bromacil and 0.4% MCPA sodium salt Add 6.1g bromacil active ingredient and 20.6g MCPA sodium salt solution to 900ml water and stir with stirring. 1.3 g of sodium hydroxide, 1.2 g of the component, 1 g of polyoxyethylene alkyl ether, and 1 g of dioctylsulfosuccinate 70% were mixed and dissolved, and water was added to prepare 1000 ml.

(Formulation example 9) Mixed herbicidal solution of bromacil 0.5% and mecoprop-P potassium salt 0.3% Bromasil active substance 5.1g, mecoprop-P potassium salt 50% liquid agent was added to 900 ml of water, and bromacil was stirred. A solution was prepared by mixing 1.3 g of potassium hydroxide, 1.2 g of the component, 1 g of polyoxyethylene alkyl ether, and 1 g of dioctyl sulfosuccinate 70%, and adding water to make 1000 ml. The pH of this solution was 10.7.

(Formulation Example 10) Mixed herbicidal solution of terbacil 8.0%, MCPA sodium salt 4.0% To 70 ml of water, 8.2 g of terbacil active ingredient and 20.5 g of MCPA sodium salt 19.5% solution were added and stirred while stirring. A solution was prepared by mixing and dissolving 1.8 g of sodium hydroxide, 1.2 g of the component, 1 g of polyoxyethylene alkyl ether and 1 g of dioctyl sulfosuccinate, and adding water to 100 ml.

(Formulation Example 11) Glyphosate isopropylamine salt 1.0%, Turbacil 0.3%, MCPA sodium salt 0.2% mixed herbicidal solution Glyphosate isopropylamine salt 41% solution (Sanfulon solution, Taisei Agricultural Materials Co., Ltd.) Product) 24.4 g, Tarbacil active ingredient 3.1 g, MCPA sodium salt 19.5% solution 10.3 g were added, and while stirring, sodium hydroxide to be 1.2 times mol of the tarbacil component and glyphosate isopropylamine component 2. 8 g, 1 g of polyoxyethylene alkyl ether, and 1 g of dioctyl sulfosuccinate 70% were mixed and dissolved, and water was added to prepare a solution of 1000 ml.

(Comparative Formulation Example 1) Mixed granule of bromacil 1.5% and mecoprop potassium salt 2.5% Kaolin clay 297.3g, bentonite 175g, bromacil drug substance 7.7g, mecoprop potassium salt 50% solution 25g, dioctyl Sulfosuccinate 70% 5g, sodium dodecylbenzenesulfonate 60% (Neopelex NO.6F powder, Kao Co., Ltd.) 2.5g were mixed for 10 minutes with a mixing stirrer at 250 rpm, and 90ml water was added. In addition, the mixture was kneaded for 5 minutes. Next, the mixture was granulated with an extrusion granulator (table-type granule production machine KAR-130, manufactured by Tsutsui Rika Kikai Co., Ltd.) equipped with a 0.8 mm screen, dried at 80 ° C. for 3 hours, pulverized to 0. Classification was adjusted to 3 to 1.7 mm.

(Comparative formulation example 2) Tarbacil 2.0% granule 307.3 g of kaolin clay, 175 g of bentonite, 10.2 g of tarbacil active ingredient, 70 g of dioctyl sulfosuccinate, 5 g of sodium dodecylbenzenesulfonate 60% 2.5 g The mixture was mixed for 10 minutes while rotating at 250 rpm in the machine, and further 100 ml of water was added and kneaded for 5 minutes. Next, the mixture was granulated with an extrusion granulator equipped with a 0.8 mm screen, dried at 80 ° C. for 3 hours, pulverized, and classified to 0.3 to 1.7 mm.

(Comparative Formulation Example 3) Turbacil 2.0%, Mecoprop-P potassium salt 1.5% mixed granule Kaolin clay 299.8g, Bentonite 175g and Turbacil active ingredient 10.2g, Mecoprop-P potassium salt 50% solution 15g, Dioctyl sulfosuccinate 70% 5 g and sodium dodecylbenzenesulfonate 60% 2.5 g were mixed with a mixing stirrer at 250 rpm for 10 minutes, and further 95 ml of water was added and kneaded for 5 minutes. Next, the mixture was granulated with an extrusion granulator equipped with a 0.8 mm screen, dried at 80 ° C. for 3 hours, pulverized, and classified to 0.3 to 1.7 mm.

(Comparative formulation example 4) Bromasil 2.0%, metsulfuron methyl 0.01% mixed fine powder Silica sand carrier adjusted to 0.1-0.3mm (silica sand V7, Mikawa Silica Co., Ltd. product) 479.8g mixed While rotating at 300 rpm with a stirrer, 10.2 g of bromacil active ingredient, 2.5 g of metsulfuron methyl 60% wettable powder suspended in water and adjusted to 2% metsulfuron concentration, dioctylsulfosuccinate 70 % 5g was added and mixed for 10 minutes. Next, 5 g of white carbon was added and stirred for 1 minute. After drying at 60 ° C. for 3 hours, classification was adjusted with a 0.5 mm sieve.

(Comparative Formulation Example 5) Bromasil 0.5% solution To 900 ml of water, 5.1 g of bromacil drug substance is added, and 1.2 g of sodium hydroxide 1.2 times mole of bromacil drug substance while stirring, 1 g of polyoxyethylene alkyl ether , And 1 g of dioctylsulfosuccinate 70% were mixed and dissolved, and water was added to prepare a solution of 1000 ml.

(Comparative Formulation Example 6) Glyphosate isopropylamine salt 1.0% MCPA sodium salt 0.2% mixed solution To 900 ml of water, 24.4 g of glyphosate isopropylamine salt 41% solution and 10.3 g of MCPA sodium salt 19.5% solution were added. While stirring, 1 g of polyoxyethylene alkyl ether and 1 g of dioctyl sulfosuccinate 70% were mixed and dissolved, and water was added to prepare a liquid preparation of 1000 ml.

  The herbicidal effects of the above Formulation Examples 1 to 11, Comparative Formulation Examples 1 to 6, and the commercially available control drug on plants were compared.

[Effect comparison test between fine granules and granules]
The field in the Tonoyama area of Tsukuba, Ibaraki Prefecture, where Tade, Artemisia, Sequoia spruce, and Japanese horsetail are dominant, is divided into 2.0 m ² , mixed granule according to Formulation Examples 1 to 6, and mixed granule according to Comparative Formulation Examples 1 to 3 , A fine granule according to Comparative Formulation Example 4, and a commercially available control drug 1 in which a photosynthesis inhibiting herbicidal active ingredient and a plant hormone herbicidal active ingredient are mixed, isouron 1% mecoprop 3% granule (Kusa Hunter Granule, Rainbow Pharmaceutical Co., Ltd.) As a commercial control granule 2, 20 g of mecoprop 4% darapon 10% diuron 4% granule (xanon V granule, Sumika Takeda Horticultural Co., Ltd.) was sprayed per square meter. The treatment was performed on June 7, 2006. The herbicidal effect was evaluated by the degree of response to the drug after 3 days, 1 week, 4 weeks, and 8 weeks. The degree of reaction to the drug was evaluated as 11 levels from 0 (no drug reaction) to 10 (complete killing). Table 1 shows the averaged results of two replicates for each drug.
In the table, MCPANa represents MCPA sodium salt, mecoprop K represents mecoprop potassium salt, mecoprop PK represents mecoprop-P potassium salt, and glyphosate IPA represents glyphosate isopropylamine salt.

As shown in Table 1, the fine granule which enables the absorption of the foliage by mixing the phytohormonal herbicidal active ingredient with the photosynthesis inhibiting herbicidal active ingredient remarkably accelerates the herbicidal action and improves the herbicidal activity. The granule of Comparative Formulation Example 2 containing only the photosynthetic inhibitory herbicidal active ingredient showed regeneration of horsetail. However, for other plants, the herbicidal activity is higher compared to the granule product mixed with the phytohormone herbicidal active ingredient. It shows that antagonism appears with herbicidal active ingredients.
The main weeds that caused a decrease in the degree of weeding over time in Table 1 were euchococcus that regenerated and subsequently occurred, except for the occurrence of horsetail in Comparative Formulation Example 2.

[Efficacy test of liquid preparation]
The field in Tonoyama, Tsukuba City, Ibaraki Prefecture, where Tade, Mugwort, Sequoia spruce, and Japanese horsetail are dominant, is divided into 2.0 m ² , mixed solutions according to Formulation Examples 7 to 9 and Formulation Example 11, and mixed solutions according to Formulation Example 10 As a commercially available control solution 4, a 20-fold diluted solution of Comparative Formulation Example 5 and Comparative Formulation Example 6, and a mecoprop 50% solution (MCPP solution, Maruwa Biochemical Co., Ltd.) as a commercially available control drug 3 Bentazone 33%, MCPA sodium salt 6% solution (grassine M sodium solution, Nissan Chemical Industries, Ltd.) 50-fold diluted solution, and commercially available control solution 5 glyphosate isopropylamine salt 1.0% solution (grass shower, living 60 ml per square meter was sprayed. The treatment was performed on June 7, 2006. The herbicidal effect was evaluated by the degree of response to the drug after 3 days, 1 week, 4 weeks, and 8 weeks. The degree of reaction to the drug was evaluated as 11 levels from 0 (no drug reaction) to 10 (complete killing). Table 2 shows the averaged results of two replicates for each drug.

As is clear from Table 2, a solution obtained by mixing a herbicidal active ingredient with a photosynthetic inhibitory herbicidal active ingredient significantly accelerates the herbicidal action and improves the herbicidal activity.
The main weeds that caused a decrease in the degree of weeding over time in Table 2 were: Formulation Examples 7 to 11 were regenerated and later generated enorticia, and Comparative Formulation Example 5 was regenerated and succeeded to reindeer and mugwort. Enocologosa, Comparative Formulation Example 6 is a post-emergent Enocorosa, cypress, commercially available control drug 3 is the regeneration of sorghum and mugwort, and a post-emergent stag beetle, commercially available control drug 4 is a reproductive of smelt moth, mugwort, mosquito, and horsetail In the case of post-emergence enocologosa and the commercially available control drug 5, there are regeneration of cedar and post-occurrence enocologosa, cypress.

Claims (2)

  Isouron (ISO name isouron), carbutyrate (ISO name karbutilate), diuron (ISO name diuron), tebuthiuron (ISO name tebuthiuron), linuron (ISO name linuron), cyananadine (ISO name cyanazine), terbacyl (IL) terbacyl (IL) (ISO name bromacil), at least one photosynthesis inhibiting herbicidal active ingredient selected from metribuzin (ISO name metribuzin), 2,4-D (ISO name 2,4-D), MCPA (ISO name MCPA), mecoprop (ISO) Name mecoprop), mecoprop-P (ISO name mecoprop-P), triclopyr (ISO name tricyclor), dicamba (ISO name dicamba), Beauty at least one plant hormone herbicides deposited on mineral carrier of 0.06~0.3mm particle size by mixing the herbicidal active ingredient selected from the salts thereof.   At least one photosynthesis-inhibiting herbicidal active ingredient selected from terbacil (ISO name terbacil), bromacil (ISO name bromocil), and metribuzin (ISO name metribuzin), 2,4-D (ISO name 2,4-D), MCPA ( At least one plant hormone herbicide selected from ISO name MCPA), mecoprop (ISO name mecoprop), mecoprop-P (ISO name mecoprop-P), triclopyr (ISO name tricyclopyr), dicamba (ISO name dicamba), and salts thereof A herbicide in which active ingredients are mixed and dissolved in water.