JPH0645521B2 - Spreading agent composition for insecticidal fungicide applied to soil - Google Patents

Description

TECHNICAL FIELD The present invention relates to a spreader composition for insecticidal fungicides which is applied to soil.

More specifically, the present invention relates to a spreader composition for insecticidal fungicides which binds the active ingredients of insecticidal fungicides with soil particles so that the active ingredients do not flow out even during sprinkling or rain, thus improving sustainability.

(Prior Art) Conventionally, most fungicides or insecticides are commercially available in the form of emulsions or wettable powders. For example, sterilizing and disinfecting agents for horticulture, termite repellents, etc. are commercially available in the form of wettable powders containing nonionic surfactants and kerosene or xylene mixed in several% to several tens% of these active ingredient compounds, and sprayed. It is sometimes applied by diluting with water to make an emulsion.

Compounds for disinfecting insecticides include DDVP (dimethyldichlorovinylphosphate), marathon (dimethyldicarbetoxyethyldithiophosphate), chlordane (1,2,
4,5,6,7,8,8-octachloro-2,3,3a, 4,7,7a-hexahydro-4,7-methanoindene) and other phosphorus-based, halogen-based, etc. Nonionic surfactant such as monooleate or polyoxyalkyl ether 1 to 10%, usually 5 to 6%, kerosene or xylene about 70% and the rest are commercially available in the form of wettable powder of the composition of the active ingredient compound. Has been done. This wettable powder or concentrated emulsion is diluted with water 10 to 20 times, sometimes 50 times or more, and is stirred to obtain a stirred emulsion, which is then sprayed on the soil by a sprayer. As described above, termite pesticides and bactericidal insecticides for horticultural use that are commercially available in the form of wettable powders or concentrated emulsions are excellent in that they do not require the use of a dangerous calcinable solvent as long as they are diluted with water for their application. ing. But on the other hand,
If water is applied or rain is applied after application, the active ingredient compound is easily washed away as, for example, a milky white liquid, and the effect does not continue. In addition, the risk of secondary pollution due to spills is great.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned problems that occur when soil is sprayed with an insecticide, improves the sustainability of the bactericidal and insecticidal effect after application, and may cause secondary pollution. The present invention is intended to provide a composition in which

(Means and Actions for Solving Problems) The present invention comprises a disinfectant insecticide sprayed on soil, which contains an alginic acid alkali salt, dibenzylidene sorbitol or a nuclear substitution derivative thereof, an anionic surfactant and a polar organic solvent as essential components. It is a spreading agent composition.

As the alkali salt of alginic acid, sodium, potassium, ammonium and triethanolamine salts are preferable, and the most preferable is sodium salt. This is because alginic acid sodium salt is light in color and cheaper than others. The alginic acid alkali salt has a function of causing a substitution reaction with Ca ions, Mg ions and the like in the soil when sprayed on the soil to form Ca alginate or Mg alginate and the like to cause a weak gel state.

Dibenzylidene sorbitol is generally produced by dehydration condensation of 2 mol of benzaldehyde and 1 mol of D-sorbitol in the presence of an acid catalyst, and its shape is white powder. A nuclear-substituted derivative of dibenzylidenesorbitol with an alkyl group or a halogen group can also be obtained in the same manner as above using a nuclear-substituted derivative of benzaldehyde. For example, di (p-methyl) benzylidene sorbitol, di (p-chloro) benzylidene sorbitol and the like. These nuclear-substituted derivatives can be applied to the composition of the present invention just like dibenzylidene sorbitol. As the nuclear substituent of the nuclear substitution derivative, an alkyl group such as a methyl group and an ethyl group; an alkoxy group such as a methoxy group and an ethoxy group; and a halogen atom such as chlorine are used. Dibenzylidene sorbitol and its nuclear substitution derivative bind the active ingredient compound in the emulsified fungicidal insecticide to the gel formed by the alginic acid alkali salt and Ca ion in the soil due to its original remarkable aggregation action. , And further forms a water-insoluble film around it.

As the anionic surfactant, fatty acid soaps, alkyl sulfate astells, alkyl sulfonates, aromatic sulfonates, aliphatic sulfonates, and the like, which are commonly used as anionic surfactants, are not particularly limited in their types. Absent. The anionic surfactant has an action of emulsifying dibenzylidene sorbitol or its nuclear substitution derivative in the spreader composition.

As the polar organic solvent, aprotic polar solvents such as dimethylformamide, N-methyl-2-pyrrolidone and dimethylsulfoxide are used. Among them, dimethylformamide and N-methyl-2-pyrrolidone are preferable because they are liquid and easy to handle even when the temperature drops. The polar organic solvent is used as a solvent for dibenzylidene sorbitol or its nuclear substitution derivative.

Each of the above-mentioned components is 0.5 to 10 parts by weight of dibenzylidene sorbitol or a nucleus-substituted derivative thereof, preferably 0.
5 to 5 parts by weight; anionic surfactant 0.5 to 30 parts by weight, preferably 0.5 to 15 parts by weight; polar organic solvent 1 to
70 parts by weight, preferably 2 to 50 parts by weight, and 0.1 to 5 parts by weight, and preferably 0.2 to 3 parts by weight of alginic acid alkali salt. Since the alginic acid alkali salt is usually used in the form of an aqueous solution, the spreading agent composition of the present invention contains about 0.5 to 10 parts by weight of water per 1 part by weight of the above four components.

The content ratio of each of the above components is not particularly limited, but if the content of dibenzylidene sorbitol or its nuclear substitution derivative is too large, the entire composition tends to gel and become unstable. On the other hand, if the amount is too small, the effect of binding to the gel described above is reduced and the water resistance becomes poor. When the content of the anionic surfactant is insufficient, the components of the composition are difficult to emulsify and the emulsification is not particularly good even when used in excess, and sometimes when a spreading agent is added to a wettable powder of a germicidal insecticide, It may act with the surfactant in the wettable powder to impair the stability of the emulsion. If the amount of the organic solvent is too small, undissolved dibenzylidene sorbitol or a nuclear-substituted derivative thereof remains and the action and effect thereof become insufficient. If the amount is too large, the alginic acid alkali salt precipitates and the emulsified state tends to become unstable. Also, if the content of the alginic acid alkali salt is too small, the substitution reaction with Ca ions or Mg ions in the soil becomes insufficient, and if it is too large, the viscosity of the emulsified sterilization and insecticide becomes high and the dispersion state of the drug emulsion May result in a failure.

The spreader composition of the present invention is generally used at the time of emulsification by diluting a wettable powder or concentrated emulsion of a commercially available germicidal insecticide with water or after emulsification. %, Preferably 0.2 to 5% (% by weight).

The spreader composition of the present invention can be obtained by mixing the components described above in a predetermined ratio and does not require a special production method. However, dibenzylidene sorbitol is an organic solvent and an anion interface. A method of mixing and dissolving in an activator to form a solution, on the other hand, a powder of an alkali salt of alginic acid is mixed and dissolved in water to form an aqueous solution, and a solution of the above-mentioned organic solvent of dibenzylidene sorbitol and an alkaline aqueous solution of alginic acid is mixed to form a final composition. It is good to take. When mixing a solution of dibenzylidene sorbitol in an organic solvent and an aqueous solution of alkali alginate, adding a small amount of 0.5 to 2 parts by weight of triethanolamine per 100 parts by weight of both solutions facilitates uniform mixing of both solutions. The mixing time can be shortened. For example, 4.5 parts by weight of dibenzylidene sorbitol, 9.5 parts by weight of an anionic surfactant and 9.5 parts by weight of dimethylformamide are mixed and heated to 100 ° C. or lower, usually about 80 ° C. to completely dissolve dibenzylidene sorbitol. The temperature is maintained for about 10 to 15 minutes and then cooled to room temperature. Separately sodium alginate powder 3
Part by weight is added to 97 parts by weight of water and dissolved by stirring to form a viscous aqueous solution.

The dibenzylidene sorbitol anionic surfactant
20 parts by weight of dimethylformamide solution, 50 parts by weight of aqueous solution of sodium alginate and 0.3 parts of triethanolamine.
5 parts by weight are mixed and stirred until clear to obtain the spreading agent of the present invention.

(Example) Hereinafter, the present invention will be described more specifically by way of examples. In the examples, "parts included" means "parts by weight" and "% by weight".

Example 1 (1) Solution 1 Dibenzylidene sorbitol powder (manufactured by EC Chemicals Co., Ltd.) 5 parts Sodium lauryl sulfonate 36% aqueous solution (manufactured by Kyoyo Co., Ltd.) 20 parts N-methyl-2-pyrrolidone (Mitsubishi Kasei) (Industrial Co., Ltd.) 75 parts The above components are mixed, heated to 80 ° C., kept for 15 minutes and cooled to room temperature. This is solution 1.

(2) Solution 2 Sodium alginate (reagent) 3 parts Water 97 parts The above components are mixed and stirred at a temperature of 60 ° C to dissolve to 3%.
Make an aqueous solution of. This is solution 2.

(3) The above solutions (1) and (2) are mixed in the following ratio.

Solution 1 20 parts Solution 2 79 parts Triethanolamine 1 part When the mixture is slowly stirred for 10 to 15 minutes, it is uniformly mixed to form a clear solution. This is designated as Composition 1.
Commercially available termite control agent chlordane wettable powder (1,2,4,5,6,7,8,8-octachloro-2,3,3a, 4,7,7a manufactured by Versicol Chemical
-Hexahydro-4,7-methanoindene (containing 40%) 10 parts (200 parts) (diluted 20 times) gives a white emulsion immediately. This is a comparative product. To this, 2 parts of Composition 1 is added and stirred well. This is a reagent product.

Next, prepare two 200 ml beakers and put half the amount of soil in both beakers to smooth the surface. Each beaker is sprinkled with 20 g of the reagent and the comparative product, and after 5 minutes, another 100 ml of water is added. The comparative product immediately became cloudy in white, but the reagent product did not become cloudy at all, and the odor characteristic of chlordane was not generated. Next, the elution amount was measured to specifically confirm this effect. Ie 1
10 minutes and 10 hours after adding 00 ml of water, take 2 ml each of the upper layer water (white and cloudy) of the comparative product and the upper layer water (clear) of the reagent product in two weighing bottles, and put them in 105
The amount of eluate containing chlordane remaining in the weighing bottle was measured by removing water by evaporating with a hot air circulation dryer at ℃. The results are shown in Table 1 below.

As shown in Table 1 above, it can be seen that the amount of reagent eluted is extremely small and the active ingredient does not elute in water.

Example 2 (1) Solution 2-1 Dibenzylidene sorbitol Powder 5 parts Lapizole B30 (sodium dioctylsulfosuccinate (manufactured by NOF Corporation) 25 parts Dimethylformamide (manufactured by Shin-Nitto Kagaku Co., Ltd.) 70 parts The above components Are mixed and dissolved in the same manner as in Example 1 to obtain solution 2-1.

(2) Solution 2-2 Ammonium alginate 2 parts Water 98 parts The above components are mixed and dissolved in the same manner as in Example 1 to obtain solution 2-2.

(3) Next, the solutions of (1) and (2) above are mixed in the following proportions.

Solution 2-1 15 parts Solution 2-2 85 parts The mixture is slowly stirred at a temperature of 40 ° C. for about 30 minutes to form a completely clear reddish solution.

This is designated as Composition 2.

Addition of 500 parts of water (diluted 50 times) to 10 parts of a commercially available marathon wettable powder (containing 50% of dimethyl dicarbetquinothiophosphate) immediately gives a white emulsion. This is a comparative product.

3 parts of the composition 2 was added to the comparative product and stirred well. This is a test product.

The effect of acid water after soil application was examined in the same manner as in Example 1 for each of the comparative product and the test product. The water spray of the comparative product became cloudy, but the test product remained transparent.

Next, the elution amount was measured by the same method as in Example 1. The results are shown in Table 2 below.

From the results shown in Table 2 above, it can be seen that the test product is much less eluted than the comparative product, and its effect is excellent.

Example 3 (1) Solution 3-1 Di (P-methyl) benzylidene sorbitol powder (manufactured by Shin Nippon Rika Co., Ltd.) 3 parts Diapon PC (oleoylmethyl taurine sodium dispersion) 35% NOF Corporation 20 parts dimethyl Formamide 77 parts The above components were mixed and dissolved in the same manner as in Example 1 to obtain solution 3-1.
And

(2) Solution 3-2 Sodium alginate 3 parts Water 97 parts The above components are mixed and dissolved in the same manner as in Example 1 to obtain solution 3-2.

(3) The above solutions (1) and (2) are mixed in the following proportions.

Solution 3-1 20 parts Solution 3-2 80 parts The mixture is slowly stirred at a temperature of 40 ° C. for about 25 to 30 minutes to form a completely clear colorless liquid. This is designated as Composition 3. 200 parts of water (diluted 20 times) was added to 10 parts of a commercially available DDVP wettable powder (containing 25% of dimethyldichlorovinylphosphate) to obtain emulsion, which was used as a comparative product.

5 parts of the composition 3 was added to the comparative product and well stirred, and this was used as a test product.

With respect to each of the comparative product and the test product, the effect of water sprinkling after spraying the soil was examined by the same method as in Example 1. The water spray of the comparative product became cloudy, but that of the test product remained transparent. Also, the elution amount was measured in the same manner as in Example 1. The results are shown in Table 3 below.

From the results in Table 3 above, it can be seen that the test product has an extremely small amount of elution and its effect is large.

(Effects of the invention) As is clear from the above description, the spreader composition for bactericidal and insecticides of the present invention is such that the active ingredient in the bactericidal insecticide is well bound to the soil particles so that it can be sprinkled in the soil even during sprinkling or rainfall. It has the excellent effect of minimizing the loss of water. Therefore, the effectiveness as a bactericidal insecticide continues for a long time,
Furthermore, it also has the effect of preventing the occurrence of secondary pollution due to the outflow of active ingredients.

Claims (2)

[Claims] 1. A spreader composition for insecticidal fungicides sprayed on soil, comprising an alginic acid alkali salt, dibenzylidene sorbitol or a nuclear substitution derivative thereof, an anionic surfactant and a polar organic solvent as essential components. . 2. 0.1-5 parts by weight of alginic acid alkali salt,
Dibenzylidene sorbitol or its nuclear substitution derivative 0.
The spreader composition for insecticidal fungicides according to claim 1, which contains 5 to 10 parts by weight, 0.5 to 30 parts by weight of an anionic surfactant, and 1 to 70 parts by weight of a polar organic solvent.