JPH0818924B2 - Pesticide aid - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an agricultural chemical assistant, the purpose of which is to prevent the precipitation even when mixed in a liquid agricultural chemical and to evenly disperse and efficiently adsorb and retain the agricultural chemical main ingredient.
Moreover, it has excellent spreadability to leaf stems and soil, and can be evenly sprayed without uneven distribution of the main pesticide base, and can be easily used, and can reduce the excessive amount of pesticide sprayed. To provide. In this specification, pesticides are formulated by adding a bulking agent, a spreading agent, a surfactant, dilution water, etc. to the main ingredient of the pesticide that has the effect as a fungicide, insecticide, herbicide, etc. It means a thing.

[0002]

2. Description of the Related Art Conventionally, it has been widely used to use charcoal as an adsorbent for chemicals such as agricultural chemicals. For example, Japanese Patent Application Laid-Open No. 54-67033 discloses a technique for increasing the effective period by adsorbing a fungicide or herbicide on activated carbon to adjust the elution rate and prolonging the effective period. -169601 discloses a technology relating to a granular pesticide composition in which the pesticidal active ingredient is gradually eluted in water. Further, JP-A-51-123829 discloses a solid drug produced by dissolving a drug having an antifungal or antibacterial effect in a solvent, impregnating the solvent into a porous adsorbent, and then removing the solvent. There is disclosed a fungicide or a fungicide for industrial products, which is characterized in that the drug is gradually desorbed from the porous adsorbent by exchanging with water in the air to maintain the antibacterial effect. There is. Further, JP-A-54-35064 discloses a treatment agent for promoting plant growth characterized by using a substance having an adsorptive power as an active ingredient, and activated carbon is exemplified as the substance having an adsorptive power. There is. Further, Japanese Patent Application Laid-Open No. 61-197503 discloses a technique relating to an agrochemical composition in which activated carbon powder is mixed with an agrochemical main ingredient.

However, the techniques disclosed in these documents are not the techniques most suitably used for liquid agricultural chemicals such as emulsions and wettable powders which are usually most commonly used. That is, the techniques disclosed in JP-A-54-67033 and JP-A-56-169601 relate to granular pesticide compositions, and JP-A-61-197503 and JP-A-51-123825. In the technology disclosed in JP-A No. 54-35064 and JP-A No. 54-35064, when mixed in a liquid pesticide formulation, activated carbon powder floats on the surface of the liquid or absorbs water to settle in the pesticide formulation. Not only does it not adsorb the main agricultural chemicals efficiently without being evenly diffused, but also the insecticidal and bactericidal effects are unsatisfactory because they cannot be evenly distributed at the spraying site and are unevenly distributed.

On the other hand, it has been conventionally practiced to use an inorganic porous material such as zeolite or bentonite as a carrier for adsorbing agricultural chemicals. For example, Japanese Patent Application Laid-Open No. 49-13337 discloses an agrochemical carrier which contains zeolite as a main component and further contains one or more kinds of other fine mineral powder and a surfactant. Further, Japanese Patent Application Laid-Open No. 4-208204 discloses a suspension-type industrial bactericidal agent plastic product obtained by adding particulate silicon oxide or bentonite to a suspension of BIT particles. Furthermore, JP-A-49-102848, JP-A-62-234001, and JP-A-2-96.
Japanese Patent No. 503 also discloses a technique of adding a water-soluble polymer substance such as sodium alginate, carboxymethyl cellulose, and a polysaccharide to a pesticide, an insecticide, etc. to gel the pesticide.

[0005]

However, Japanese Patent Laid-Open No. 49-13337 and Japanese Patent Laid-Open No. 4-337337 which use an inorganic porous material such as zeolite or bentonite as a main component of a carrier.
According to the technique disclosed in Japanese Patent No. 208204, the pesticide component can be adsorbed to the inorganic porous material, but the adsorbability is not sufficient, and the spreading property to the foliage and soil of the crop is weak, and rainwater, etc. There was a problem that it was easily washed away by. Also, JP-A-49-102848
JP-A-62-234001, JP-A-2-
As in the technique disclosed in Japanese Patent Publication No. 96503, only by adding a water-soluble polymer substance such as a polysaccharide and gelling, the dispersibility of the pesticide and the spreadability to the stems and soil are poor, and the pesticide is excessively sprayed. There was also the issue of need. The problem to be solved by the present invention is that even if mixed in a liquid pesticide, precipitation or the like does not occur, it is evenly dispersed and efficiently adsorbs and holds the pesticide main agent, and spreads on leaf stems or soil. It is an object of the present invention to provide a pesticide auxiliary agent which has excellent properties, can be uniformly sprayed without uneven distribution of the pesticide main agent, can be easily used, and can reduce the excessive spray amount of the pesticide.

[0006]

The invention according to claim 1 is such that pulverized coal having a particle size of 300 mesh or less, bentonite blended in an amount of 5 to 30% by weight based on the pulverized coal, and 1 to 1 of the weight of bentonite. It is a pesticide auxiliary agent to be used by mixing with a liquid pesticide characterized in that it is composed of 4 times the weight of water. The invention according to claim 2 has pulverized coal of 300 mesh pass or less, bentonite blended in an amount of 5 to 30 wt% with respect to the pulverized coal, and water blended in an amount of 1 to 4 times the bentonite weight. It is an agricultural chemical auxiliary agent to be used in combination with a liquid agricultural chemical, which is characterized by comprising one or more water-soluble polymer substances selected from chitosan, starch and sodium alginate.

[0007]

The operation of the invention described in claim 1 will be described below. Pulverized coal of 300 mesh path or less absorbs and holds the main agent of liquid pesticide and gradually elutes or volatilizes the held main agent of pesticide. It has the effect of significantly improving the spreading property and the residual property and eliminating the need to excessively spray the pesticide. When bentonite is blended in an amount of 5 to 30% by weight with respect to the pulverized coal having a particle size of 300 mesh or less, and 1 to 4 times the weight of bentonite is added, the bentonite is swollen by water and bonded to the pulverized coal to form fine powder. Since a swelling layer of bentonite is formed on the surface of the charcoal, the pesticide aid of the present invention has the effect of being uniformly dispersed in a liquid pesticide without floating or settling on the surface. When a liquid pesticide mixed with such a pesticide auxiliary is sprayed, the main pesticide can be sprayed uniformly without uneven distribution. Further, since the pulverized coal has a path of 300 mesh or less, it has an effect that it can be easily sprayed by the spraying method. Furthermore, when pulverized coal is blended, the charcoal has an excellent heat and light absorption property, so that it also has an action of promoting photosynthesis of plants and growing them.

The invention according to claim 2 is the first aspect of the invention.
In addition to the actions of the invention described in the section, it has the actions described below. Since this invention contains one or more water-soluble polymer substances selected from chitosan, starch and sodium alginate, it has the effect of being more dispersible and stable when mixed with a liquid agent. It is thought that this reason is due to reasons other than the mere thickening of this additive, and is currently under intensive study.

[0009]

EXAMPLES The effects of the present invention will be made clearer by showing Examples, Comparative Examples and Experimental examples of the agricultural chemicals auxiliary agent according to the present invention. As in Examples 1 and 2, pesticide aids according to the present invention were obtained. (Example 1) Pulverized coal (cedar) 69.6% Bentonite 7.0% Surfactant (Brand name: Sannix PP20) 3.8% Purified water 19.4% Preservative (benzoic acid) 0.2% Mix the above ingredients and stir After homogenization, a pesticide aid was obtained.

(Example 2) Pulverized coal (cedar) 69.6% Bentonite 7.0% Surfactant (trade name: Sannix PP20) 3.8% Purified water 19.4% Preservative (benzoic acid) 0.2% The above ingredients were mixed. Then, the mixture was stirred and made uniform to obtain a pesticide auxiliary agent. Furthermore, an appropriate amount of a 1% aqueous chitosan solution was added to 100 g of this pesticide aid to give a pesticide aid.

As a comparative example of the pesticide auxiliary agent obtained in Example 1 above, a pulverized coal was blended instead of bentonite to increase the blended amount of pulverized coal, and bentonite was blended instead of pulverized coal. As a result, the agrochemical assistants of Comparative Example 2 in which the amount of bentonite compounded was increased, Comparative Example 3 in which water was not compounded, and Comparative Example 4 in which zeolite as an inorganic porous material was used instead of pulverized coal were obtained. (Comparative Example 1) Pulverized coal (cedar) 76.6% Surfactant (Brand name: Sannix PP20) 3.8% Purified water 19.4% Preservative (benzoic acid) 0.2% Mix the above ingredients and stir to homogenize , Got a pesticide aid.

(Comparative Example 2) Bentonite 76.6% Surfactant (trade name: Sannix PP20) 3.8% Purified water 19.4% Preservative (benzoic acid) 0.2% The above ingredients were mixed and stirred to homogenize, I got a pesticide aid.

(Comparative Example 3) Pulverized coal (cedar) 69.6% Bentonite 7.0% Surfactant (Product name: Sannix PP20) 3.8% Preservative (benzoic acid) 0.2% The above ingredients are mixed and stirred to homogeneity. Then, the pesticide auxiliary agent was obtained.

(Comparative Example 4) Zeolite 69.6% Bentonite 7.0% Surfactant (Product name: Sannix PP20) 3.8% Purified water 19.4% Preservative (benzoic acid) 0.2% Mix the above ingredients and stir to homogeneity. Then, the pesticide auxiliary agent was obtained.

(Comparative Example 5) Pulverized coal (cedar) 70.0% Bentonite 27.0% Polyoxyethylenesorbitan alkylate 1.0% Sodium dinaphthylmethanedisulfonate 2.0% The above ingredients were pulverized and mixed and kneaded by adding water, 1 mm
Extruded through the pores of and dried to a particle size of 0.5 to 1.2
The pesticide auxiliary agent of Comparative Example 5 was obtained by sieving into mm.

(Experimental Example 1) 1 g of Sumithion (registered trademark) was diluted with 1 liter of water in a beaker, and 3 g of each pesticide auxiliary agent obtained in the above-mentioned Examples and Comparative Examples was added to this and stirred. It was used as a pesticide. The dispersibility of the pesticide thus obtained was visually examined. The one in which the suspended matter or the precipitate on the liquid surface could be confirmed was marked with X, and the one uniformly dispersed in the liquid was marked with ◯. The results are shown in Table 1.

Table 1

(Experimental Example 2) Using the pesticide obtained in Experimental Example 1, the spreadability and persistence of Sumithion (registered trademark) were examined by the following methods. 100cm ×
Prepare a square pot with a height of 100 cm and a height of 20 cm and fill it with soil up to a height of 15 cm.
d) was spread and planted. The bottom of this pot was formed with slits having a width of 5 mm at intervals of 5 cm to improve drainage. Also,
A water tank was provided under the pot so that water and the like flowing out from the slit could be stored. Five such pots were prepared, and each pesticide 1 obtained in Experimental Example 1
Each liter was sprayed on. In addition, among the pesticides obtained in Experimental Example 1, the pesticides containing the pesticide auxiliary agents of Comparative Example 1, Comparative Example 3, and Comparative Example 5 having poor dispersibility were sprayed after being stirred before spraying. Zoysia
Tenuifolia Willd) was sprayed with 2 liters of water evenly once a day, so that the water accumulated in the aquarium was removed every day, and new water was accumulated every day. The odor of water and the like flowing out from the slits stored in the water tank was examined by a sensory test. Those with a smell of sumithion were marked with ×. The results of these residual tests are summarized in Table 2.

Table 2 In the examples marked with *, the pesticide was slightly sprayed from the nozzle at first, but immediately clogging occurred and spraying became impossible.

Further, the spreadability of pulverized coal and zeolite on the leaf surface was visually confirmed. When the pulverized coal and zeolite were remarkably confirmed on the leaf surface, the mark was ○, when the pulverized coal was slightly confirmed on the leaf surface, the mark was Δ, and when the pulverized coal was not confirmed on the leaf surface, the mark was ×. The results of these spreadability tests are summarized in Table 3.

Table 3

Reference Example As a reference example, an underwater pesticide decay test for investigating the adsorption of pesticides on pulverized coal is shown below. Green tanso No. 1 (sawdust compressed charcoal powder) (Sample 1) and VA carbon (powdered coal) (Sample 2) were used as pulverized coal. γ-BHC 500 μg /
1 ml of ml hexane solution was put into a glass solution, hexane was distilled off with nitrogen, and 500 ml of distilled water was added to prepare a 1 μg / ml pesticide aqueous solution. 1g of each sample is 100m of this pesticide aqueous solution
In addition to 1, the mixture was shaken for 24 hours, then centrifuged, and the supernatant was collected to measure its γ-BHC concentration. The results of this measurement are shown in Table 4.

Table 4 The detection limit was 0.001 μg / ml, and the measured concentration of the pesticide aqueous solution used in the experiment was 0.85 μg / ml.

The material of the pulverized coal used in the agricultural chemicals aid of the present invention is not particularly limited, and specific examples thereof include pine, cedar, oak, cypress, coconut husk, ogarite and the like. The particle size of the pulverized coal may be in any range as long as it has a particle size of 300 mesh pass or less suitable for using the spraying method by the spraying method, and can be appropriately set depending on the use of agricultural chemicals and the like. .

Further, the blending amount of bentonite with respect to the pulverized coal is preferably 5 to 30% by weight with respect to the pulverized coal. The reason for this is that if the blending amount of bentonite is less than 5% by weight with respect to the pulverized coal, the pulverized coal is not sufficiently dispersed in the liquid pesticide, while if the blending amount of bentonite exceeds 30% by weight, conversely. This is because the spreadability and persistence of the pesticide on the leaf stem and soil are poor, and it is not preferable in any case.

Any water such as tap water, well water, and purified water can be suitably used as the water to be blended with the agricultural chemicals auxiliary agent of the present invention, as long as it does not contain dust.
The blending amount of water is preferably 1 to 4 times the weight of bentonite. The reason for this is that if the weight is less than 1 times the weight of bentonite, the amount of water is small and the bentonite does not function sufficiently as a binder. On the other hand, if it exceeds 4 times the weight of bentonite, the amount of water is too large and the bonding state becomes weak. , When pulverized coal and bentonite are separated when blended in pesticide and dispersed with dilution water, pulverized coal floats on the liquid surface, or absorbs water over time and settles in the pesticide. This is because it will end up.

The water-soluble polymer used in the present invention is preferably added as an aqueous solution of about 1% to the above-mentioned pesticide auxiliary agent immediately before blending with the pesticide. The reason for this is a highly concentrated aqueous solution,
Alternatively, after a long time has passed after the addition, the pesticide auxiliary agent solidifies. The blending amount of this additive may be appropriately set according to the type of the additive, the pesticide auxiliary agent, etc., and is not particularly limited.

If desired, the agricultural chemicals auxiliary agent according to the present invention may be mixed with a preservative or the like. The preservative may be any one that does not prevent the pesticide auxiliary from preserving, and specific examples thereof include acids such as benzoic acid, salicylic acid and dehydroacetic acid, and phenols such as phenol, chlorocresol and parabenzoic acid ester. When a wood vinegar solution is used as the agricultural chemicals aid according to the present invention, the wood vinegar solution simultaneously has the functions of water as a binder of bentonite and pulverized coal and an antiseptic agent. A surfactant may be added to the agrochemical auxiliary agent according to the present invention in order to improve dispersibility in the agrochemical.

The above-mentioned pesticide auxiliary agent is blended with a liquid pesticide and diluted with a diluting amount of water set by the main pesticide ingredient before use. As the pesticide used together with this pesticide auxiliary, a pesticide usually used can be preferably used and is not particularly limited. It is not necessary to add a large amount of this pesticide auxiliary agent, and it can be suitably used in an amount of about 0.05 to 2% by weight with respect to the pesticide diluted with water.

[0030]

According to the first aspect of the present invention, pulverized coal having a particle size of 300 mesh or less, bentonite blended in an amount of 5 to 30% by weight based on the pulverized coal, and a bentonite weight of 1
It is a pesticide auxiliary agent that is used by being mixed with a liquid pesticide characterized in that it is composed of water mixed in an amount of 4 times by weight.
Pulverized coal of 0 mesh path or less absorbs and holds the main ingredient of liquid pesticide and gradually elutes or volatilizes the held main ingredient of pesticide. The spreadability and persistence to the
This has the effect of eliminating the need to overspray pesticides. When bentonite is blended in an amount of 5 to 30% by weight with respect to the pulverized coal having a particle size of 300 mesh or less, and 1 to 4 times the weight of bentonite is added, the bentonite is swollen by water and bonded to the pulverized coal to form fine powder. Since the bentonite swelling layer is formed on the surface of the charcoal, the pesticide auxiliary agent of the present invention has the effect of being uniformly dispersed in the liquid pesticide without floating or settling on the surface. When a liquid pesticide mixed with such a pesticide auxiliary is sprayed, the main pesticide can be sprayed uniformly without uneven distribution. Also, pulverized coal is 3
Since it is less than 00 mesh pass, it has an effect that it can be easily sprayed by a spraying method. Furthermore, when pulverized coal is blended, the charcoal has an excellent heat and light absorption property, so that it also has an effect of promoting photosynthesis and growing of plants.

The invention according to claim 2 is such that pulverized coal having a mesh size of 300 mesh or less, bentonite blended in an amount of 5 to 30% by weight based on the pulverized coal, and 1 to 1 of the weight of bentonite
A pesticide auxiliary agent to be used by mixing with 4 times the weight of water and a liquid pesticide characterized by comprising one or more water-soluble polymer substances selected from chitosan, starch and sodium alginate. Therefore, in addition to the effect of the invention described in claim 1, when mixed with a liquid pesticide, the effect of better dispersibility and stability is exhibited.

 ─────────────────────────────────────────────────── ─── Continuation of front page (56) Reference JP-A-49-13337 (JP, A) JP-A-49-102848 (JP, A) JP-A-62-234001 (JP, A) JP-A-2- 96503 (JP, A) JP-A-4-208204 (JP, A) JP-A 51-123829 (JP, A) JP-A 54-35064 (JP, A) JP-A 54-67033 (JP, A) JP-A-56-169601 (JP, A)

Claims (2)

[Claims] 1. A pulverized coal having a particle size of 300 mesh or less, bentonite blended in an amount of 5 to 30% by weight based on the pulverized coal, and water blended in an amount of 1 to 4 times the weight of bentonite. Agricultural chemicals auxiliary agent used by mixing with liquid agricultural chemicals . 2. A pulverized coal having a particle size of 300 mesh or less,
Bentonite blended 5 to 30% by weight with respect to pulverized coal
And water that is blended by 1 to 4 times the weight of bentonite,
Chitosan, starch, be composed of one or more water-soluble polymer selected from among sodium alginate JP
Agricultural chemicals auxiliary agent used by mixing with liquid agricultural chemicals .