JPH06305904A - Aqueous insecticidal preparation - Google Patents

Abstract

PURPOSE:To provide an insecticidal preparation which can be applied as it is without diluting with water or after diluting with a small amount of water. CONSTITUTION:The aqueous insecticidal preparation contains 0.01-20wt.% of an insecticidal component and >0.03wt.% of a surfactant. The preparation can be applied to noxious insects or affected plants as it is without diluting with water or in a state diluted with a small amount of water. It has high insecticidal effect and low toxicity and is free from phytotoxicity to plant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an agricultural and horticultural field, and more particularly to an aqueous insecticidal preparation which can be directly applied to plants in the horticultural field.

[0002]

Conventionally known insecticidal preparations usually contain a large amount of the insecticidal component in an amount of about 20 to 75% by weight and a surfactant in an amount of about 10 to 30% by weight.

When these preparations are used in practice, they are not directly sprayed on the plants, but once diluted with water by about 1000 to 2000 times, for example, the insecticide concentration is about 0.01 to 0.075% by weight, and the surface activity is about 10%. The agent is sprayed at a dilute concentration of about 0.005-0.03%.

However, an insecticidal preparation which is sprayed directly on plants without being diluted with a large amount of water before use has not been known yet.

[0005]

The insecticidal preparations conventionally used in the field of agriculture and horticulture are generally emulsions or wettable powders, which need to be diluted with a large amount of water as described above before use. is there. Therefore, the conventional preparation requires the presence of dilution water at the time of use, and there is the troublesomeness of diluting the preparation with water at a specific ratio.

[0006] Development of an insecticidal formulation which can be directly sprayed on plants without such drawbacks has been desired, but it has not been realized yet.

In response to this demand, the present invention provides an aqueous insecticidal preparation which can be used as a so-called ready-to-use type. However, since this type of preparation has a high water content, the preparation is stable in dispersion and solubilization. It becomes difficult to maintain sex. Moreover, the content rate of the insecticidal component is also lower than that of the conventional preparation. When the content of the insecticidal component is small, the storage stability of the insecticidal component generally decreases. Therefore, it cannot be put to practical use by simply diluting it with water.

[0008]

DISCLOSURE OF THE INVENTION As a result of the research conducted by the present inventors, dispersion of a preparation by containing a surfactant at a higher concentration than a pesticide diluent diluted with water for conventional use, It was discovered that the solubilization stability can be maintained, and that the storage stability of the insecticidal component is significantly improved by adding the stabilizer.

The present invention is based on this finding and comprises 0.01 to 20% by weight of an insecticidal ingredient and at least 0.03% by weight of a surfactant, or 0.01 to 10% of a stabilizer of the insecticidal ingredient. It is an aqueous insecticidal preparation containing 100% by weight.

The insecticidal component contained in the aqueous insecticidal preparation of the present invention may be any as long as it can be used in the field of agriculture and horticulture.

[0011] As an example thereof, an organic phosphorus type (eg, ME
P, marathon), carbamate system (eg, NAC, MTM)
C), synthetic pyrethroids (eg, allethrin, resmethrin), natural insecticides (eg, pyrethrin, nicotine), acaricides (eg, Kelsen, chlorbenzilate), nematicides (eg, nemamol, methylisocyanate), etc. Is mentioned.

The surfactant in the insecticidal preparation of the present invention may be any surfactant as long as it does not impair the object of the present invention, but a nonionic surfactant and an anionic surfactant are preferred.

Generally, when the concentration of the surfactant is increased, the plant is damaged after spraying. However, the present inventors have found that this problem is caused by the use of the nonionic and / or anionic surfactant. We found that it can be overcome by.

Suitable nonionic surfactants include, for example, lauryl alcohol, stearyl alcohol,
Ethylene oxide adducts of higher alcohols such as oleyl alcohol; Ethylene oxide adducts of alkylphenols such as isooctylphenol and nonylphenol;
Ethylene oxide adducts of alkyl naphthols such as butyl naphthol and octyl naphthol; ethylene oxide adducts of higher fatty acids such as palmitic acid, stearic acid and oleic acid; ethylene oxide adducts of mono- or dialkyl phosphoric acids such as stearic phosphoric acid and dilauryl phosphoric acid; Examples thereof include those obtained by polymerizing addition of ethylene oxide to amines of dodecyl amine and stearic acid amide; higher fatty acid esters of polyhydric alcohols such as sorbitan and their ethylene oxide adducts; polymerization adducts of ethylene oxide and propylene oxide. Suitable anionic surfactants include, for example, alkyl sulphate salts such as sodium lauryl sulphate, oleyl alcohol sulphate amine salts; alkyl sulphonates such as sodium sulfosuccinate dioctyl ester and sodium 2-ethylhexene sulphonate. And aryl sulfonates such as sodium isopropyl naphthalene sulfonate, sodium methylene bis naphthalene sulfonate, sodium lignin sulfonate, and sodium dodecylbenzene sulfonate.

The commercially available products include Newcargen CP-
15-15 ^R [manufactured by Takemoto Yushi Co., Ltd.], Solpol 368
8 ^R [Toho Chemical Industry Co., Ltd.], Solpol T-15 ^R
[Same as above], Sanimaru EFT-3 ^R [Japan Emulsifier Co., Ltd.
And manufactured by Sanimaru ETP ^R [same as above].

It is recommended to use a nonionic surfactant and an anionic surfactant together in a fixed ratio. The ratio is preferably about 0.05 to 1 part by weight, more preferably about 0.1 to 0.5 part by weight, relative to 1 part by weight of the nonionic surfactant. The nonionic surfactant and the anionic surfactant may be used each alone or in combination of two or more.

The preferable ratio of the insecticidal component and the surfactant is
Generally, the latter is about 0.1 to 200 parts by weight, more preferably about 0.25 to 100 parts by weight, relative to the former 1 part by weight.

The insecticidal ingredient and the surfactant are, for example,
These are mixed with water, a mixture of water and a hydrophilic solvent, and water is added as necessary to prepare an aqueous preparation containing 0.01 to 20% by weight of an insecticidal component and at least 0.03% by weight of a surfactant. can do. A preferable concentration of the insecticidal component is about 0.05 to 5% by weight, and it is desirable that the surfactant is used at a concentration of about 0.05% by weight or more, preferably about 0.1 to 20% by weight, Preferably about 0.1
10 to 10% by weight.

Examples of the hydrophilic solvent include alcohols such as methanol, ethanol and propanol,
Ketones such as acetone and methyl ethyl ketone, esters such as ethyl acetate and butyl acetate, amides such as dimethylformamide and dimethylacetamide, dioxane,
Examples thereof include ethers such as morpholine and glycol monoethers such as ethylene glycol monomethyl ether and ethylene glycol monoethyl ether, but are not limited to these examples.

In order to improve the storage stability of the insecticidal component,
In the preparation of the present invention, if necessary, a polybasic acid or its ester, for example, phosphoric acid, citric acid, isopropyl acid phosphate, isobutyl adipic acid, dioctyl adipic acid, etc., butyl hydroxytoluene, epoxy flaxseed oil, etc. It is added as a stabilizer.

If desired, butyldiglycol, methyldiglycol, etc. may be added as a solubilizing agent, and isopropanol, ethylene glycol, propylene glycol monomethyl ether, ethylene glycol monomethyl ether, etc. may be added as an antifreezing agent.

If desired, soaps, polyoxyalkyl ethers, alkyl sulfates, polyethylene glycols, alkyl sulfonates, polyhydric alcohol ethers, etc. may be added as spreading agents and wetting agents.

The stabilizer is usually about 0.01 based on the whole preparation.
It is used in a proportion of about 20% by weight, preferably about 0.1-10% by weight.

The aqueous preparation of the present invention comprises (1) an insecticidal ingredient,
It can be easily produced by mixing (2) a surfactant, (3) water or water and a hydrophilic solvent, and (4) an additive below the above stabilizer, if desired.

The thus-prepared aqueous preparation is a ready-to-use insecticidal preparation that can be directly sprayed onto plants without being diluted with water, but if desired, the concentration of the composition may be increased. It may be a formulation which is diluted with water about 2 to about 10 times and then sprayed.

[0026]

EXAMPLES Next, the production method of the insecticidal preparation of the present invention will be described in the form of Examples, and the production of the control preparation used in the test examples will be described in Reference Examples. Compare the effects.

Example 1 0.1 parts of Sumithion ^R (MEP, manufactured by Sumitomo Chemical Co., Ltd . ^{; the} same applies hereinafter) to Newcalgen CP15-150 ^R [polyoxyalkylene allyl phenyl ether, manufactured by Takemoto Yushi Co., Ltd.] After adding 4 parts and 0.5 part of butyl diglycol and thoroughly mixing, ethylene glycol 4.0
Parts and phosphoric acid 0.05 parts were added and dissolved, and normal water 94.95 was added.
Parts were added to obtain an aqueous liquid preparation.

Example 2 To 0.2 part of Sumithion ^R, 0.8 part of SOLPOL 3688 ^R [polyoxyethylene styryl phenyl ether and polyoxyethylene castor oil ether, manufactured by Toho Chemical Co., Ltd.] and 0.5 part of butyl diglycol are added. After addition and thorough mixing, 8.0 parts of isopropanol and 0.4 part of isobutyl adipic acid were added and dissolved, and 90.46 parts of ordinary water was added to obtain an aqueous liquid preparation.

Example 3 To 0.1 part of the marathon was added 0.5 part of Sanimaru EFP ^R [polyoxyethylene polystyryl ether and calcium alkylbenzene sulfonate, manufactured by Nippon Emulsifier Co., Ltd.] and 0.4 part of butyl diglycol. After mixing well,
5.0 parts of ethylene glycol and 0.05 part of butylhydroxytoluene were added and dissolved, and 93.95 parts of normal water was added to obtain an aqueous liquid preparation.

Example 4 To 0.2 part of a marathon, 1.0 part of Newcalgen D-230 ^R [polyoxyethylene castor oil, manufactured by Takemoto Yushi Co., Ltd.] and 0.4 part of butyldiglycol were added and mixed well. , 10 parts of isopropanol and 0.05 parts of butylhydroxytoluene were added and dissolved, and 58.35 parts of normal water was added to obtain an aqueous liquid preparation.

Example 5 0.1 parts of resmethrin and Newcalgen CP15-15
0 ^R [Refer to Example 1] 0.4 parts and 0.5 part of methyldiglycol were added and mixed well, then, 5 parts of ethylene glycol and 0.05 part of phosphoric acid were added and dissolved, and 9 parts of normal water were added.
An aqueous liquid preparation was obtained by adding 3.95 parts.

Example 6 To 0.2 part of resmethrin, 0.6 part of Sorpol T-15 ^R [polyoxyethylene styryl phenyl ether, manufactured by Toho Kagaku KK] and 0.5 part of methyldiglycol were added and mixed well. After that, 15 parts of isopropanol,
0.05 part of isobutyl adipic acid was added and dissolved, and 83.65 parts of normal water was added to obtain an aqueous liquid preparation.

Example 7 0.2 part of pyrethrin was added to Solpol 3688 ^R [Example 2
See]] Add 0.6 parts and 0.6 part of methyldiglycol and mix thoroughly, then add 10 parts of ethylene glycol and 0.1 part of phosphoric acid to dissolve, and add 88.5 parts of normal water to prepare an aqueous liquid preparation. Got

Example 8 0.4 part of pyrethrin was added to Newcalgen D-230 ^R [polyoxyethylene castor oil, manufactured by Takemoto Yushi Co., Ltd.] 1.0.
And 0.6 part of methyldiglycol were added and mixed well, 10 parts of isopropanol and 0.2 part of diisobutyladipic acid were added and dissolved, and 87.8 parts of ordinary water was added to obtain an aqueous liquid preparation.

Example 9 0.1 parts of Sumithion ^R and Newcalgen D-230
^R [See Example 4] 0.4 parts and 0.4 parts of butyldiglycol were added and mixed thoroughly, then 4.0 parts of ethylene glycol and 0.04 part of isobutyl adipic acid were added and dissolved, and 95 parts of normal water was added. 0.06 part was added to obtain an aqueous liquid preparation.

Example 10 0.2 part of Sumithion ^R was added to Sanimal EFP ^R [see Example 3] and 2 parts of butyldiglycol, and the mixture was thoroughly mixed. Then, 5 parts of isopropanol and 0.4 part of isobutyladipic acid were added. After dissolution, 91.6 parts of ordinary water was added to obtain an aqueous liquid preparation.

[0037] Example 11 Sumithion ^R 1 part NEWKALGEN CP15-150 to ^R
[Refer to Example 1] After adding 2 parts and 4 parts of butyldiglycol and mixing them well, 5 parts of ethylene glycol and 0.5 part of isobutyladipic acid were added and dissolved therein, and 8 parts of normal water were added.
An aqueous liquid preparation was obtained by adding 7.5 parts.

Example 12 10 parts of Sumithion ^R were added to Sanimaru EFT-3 ^R [Example 8]
Reference] After 15 parts and 8 parts of butyldiglycol were added and thoroughly mixed, 5 parts of ethylene glycol and 1 part of isobutyladipic acid were added and dissolved, and 61 parts of ordinary water was added to obtain an aqueous liquid preparation.

Example 13 To 20 parts of Sumithion ^R, 20 parts of Newkalgen D-230 ^R [see Example 4] and 10 parts of butyldiglycol were added and mixed well, and then 5 parts of ethylene glycol and 2 parts of isobutyladipic acid were added. In addition, it melt | dissolved and 43 parts of normal water was added and the aqueous liquid agent was obtained. The products of Examples 11 to 13 were used as a small amount of stock solution and a small amount of liquid agent. Reference Example 1 0.5 part of Newcol 562 ^R [polyoxyethylene nonylphenyl ether, manufactured by Nippon Emulsifier Co., Ltd.] and 0.5 part of ethylene glycol monomethyl ether were added to 0.1 part of Sumithion ^R, and thoroughly mixed. 5 parts of ethylene glycol was added and dissolved, and 93.9 parts of normal water was added to obtain an aqueous liquid preparation.

Reference Example 2 Penerol 711 ^R [polyoxyethylene alkylphenol ether, Matsumoto Yushi Co., Ltd.] in 0.2 part of marathon
Manufacture] 0.4 parts and diethylene glycol 0.5 parts were added and mixed thoroughly, 7 parts of isopropanol was added and dissolved, and 91.9 parts of normal water was added to obtain an aqueous liquid preparation.

Reference Example 3 0.2 parts of Sumithion ^R was added to Newcalgen DP-705 ^R
[Polyoxyalkylene ether, manufactured by Takemoto Yushi Co., Ltd.]
After 0.8 parts and 1 part of dimethyltriglycol were added and thoroughly mixed, 5 parts of ethylene glycol was added and dissolved, and 93 parts of normal water was added to obtain an aqueous liquid preparation.

Reference Example 4 To 0.2 parts of resmethrin, 0.8 part of Newcol 568 ^R [polyoxyethylene nonyl phenyl ether, manufactured by Nippon Emulsifier Co., Ltd.] and 1 part of methyldiglycol were added and mixed well, and isopropanol 5 was added. Then, 93 parts of normal water was added to obtain an aqueous liquid preparation.

Reference Example 5 To 0.4 part of Sumithion ^R, 0.4 part of Neugen EA80 ^R [polyoxyethylene nonylphenyl ether, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.] and 2 parts of diethyl glycol were added and thoroughly mixed. 2 parts of ethylene glycol was added and dissolved, and 90.2 parts of normal water was added to obtain an aqueous liquid preparation.

Test Example 1 The preparations obtained in the above Examples and Reference Examples were stored at room temperature for 1 month,
Analyze the amount of drug component after storage for 6 months and 1 year, analyze the residual amount with respect to the amount of component before storage, calculate the residual amount with respect to the amount of component before storage as a percentage (residual rate), and determine the stability of the drug component. The results are shown in Table 1.

[0046]

[Table 1]

As can be seen from the results in Table 1, the drug components of Examples 1 to 10 had good stability even after being stored at room temperature for 1 year. On the other hand, the drug components of Reference Examples 1 to 5 were significantly decomposed and the stability was extremely decreased.

Test Example 2 To the cold larvae of Camellia japonicum 3 of Tsubaki, the agents of Examples and Reference Examples were evenly sprayed with a dedicated hand sprayer in 1 section and 1 branch and 2 repetitions. And 18 hours later, the survival rate was determined. The same tree species were also investigated for phytotoxicity, and the results shown in Table 2 were obtained.

[0049]

[Table 2]

As is clear from the results shown in Table 2, the products of Examples all showed remarkable drug effects, but the products of Reference Examples 1 to 5 had weak effects and it cannot be said that the results were good. No phytotoxicity was observed in any of the products of Examples, and phytotoxicity occurred in all Reference Examples.

[0051]

INDUSTRIAL APPLICABILITY The aqueous insecticidal preparation of the present invention can be sprayed as it is to a target such as a pest or a plant to be controlled, and not only a high insecticidal effect can be obtained, but it is also extremely safe with little toxicity. It does not give any chemical damage.

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Claims (10)

[Claims] 1. An aqueous insecticidal preparation comprising 0.01 to 20% by weight of an insecticidal component and at least 0.03% by weight of a surfactant. 2. The preparation according to claim 1, wherein the surfactant is a nonionic surfactant and / or an anionic surfactant. 3. A nonionic surfactant 1 as a surfactant.
The formulation according to claim 1 or 2, wherein the anionic surfactant is contained in an amount of 0.05 to 1% by weight based on parts by weight. 4. An aqueous insecticidal formulation comprising 0.01 to 20% by weight of an insecticidal component, at least 0.03% by weight of a surfactant and 0.01 to 10% by weight of a stabilizer of the insecticidal component. 5. The stabilizer is polyhydrochloric acid or its ester,
The preparation according to claim 4, which is butylhydroxytoluene or epoxy flaxseed oil. 6. The preparation according to claim 5, wherein the polybasic acid is phosphoric acid or citric acid, and the ester of the polybasic acid is isopropyl acid phosphate, isobutyl adipic acid, or dioctyl adipic acid. 7. The preparation according to claim 1, wherein the insecticidal component is an organophosphorus or carbamate compound, a synthetic pyrethroid, a natural pyrethrin or an acaricidal or nematicidal compound. 8. The preparation according to claim 1, 4 or 7, wherein the insecticidal component is MEP. 9. A stabilizer for an insecticidal component in an aqueous preparation comprising polyhydrochloric acid or its ester, butylhydroxytoluene or epoxy flaxseed oil. 10. The stabilizer according to claim 9, wherein the polybasic acid is phosphoric acid or citric acid, and the ester of the polybasic acid is isopropyl acid phosphate, isobutyl adipic acid, or dioctyl adipic acid.