JPH04308510A - Enhancer of effect and insect pest controlling agent composition - Google Patents

Abstract

PURPOSE:To obtain an enhancer for effects of expelling insect pests such as flat rust-red flour beetle, showing excellent insecticidal effect by using the enhancer with an insect pest controlling component, especially causing disturbing effects on insect pests by increasing contact ratio thereof with the insect pest controlling component. CONSTITUTION:An enhancer for effects of insecticide, etc., expelling insect pests, comprising a purified plant oil and/or a terpene, preferably one not having lethal activity in open space, especially alpha-pinene, limonene, benzyl alcohol, vanillin, terpirun, coumarin, terpinyl acetate and acetophenone as an active ingredient. The enhancer of effects shows extremely high synergistic effects when used with an organic phosphorous insecticide which can not be used in a large amount because of its especially high toxicity. The enhancer activates action of insect pests because of its disturbing effect by releating insect pests from plants and increases change of insect pests coming into contact with the active ingredient, thus improves controlling effects. The amount of the enhancer used is usually 1-500 times, preferably 10-400 times as much as the insect pest controlling component.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel potency enhancer and a pest control composition comprising a mixture of the potency enhancer and a pest control component such as an organophosphorus compound.

0002

BACKGROUND OF THE INVENTION Conventionally, N-propylisome, MGK-264, Cinepirin 222, Riesen 384, IBTA, S-421, and the like have been known as efficacy enhancers.

0003

[Problem to be solved by the invention] Organic phosphorus compounds, which are pest control ingredients, are highly toxic, so there is a problem that they cannot be used in large amounts, and pyrethroid compounds are insufficiently effective, so known A potency enhancer was used in addition, but no significant effect was observed. The present invention has been made for the purpose of eliminating the above-mentioned conventional drawbacks.

0004

[Means for Solving the Problems] Therefore, the present invention relates to a potency enhancer characterized by containing a plant essential oil and/or terpenes as an active ingredient.

[0005] In the present invention, the pest control ingredients include:
Any compound having insecticidal or acaricidal activity, such as pyrethroid compounds, carbamate compounds, hydrazone compounds, and organophosphorus compounds, may be used alone or in combination.

Examples include pirimiphos-methyl, dichlorvos, fenitrothion, diazinon, fenthion, malathion, naled, chlorfenvinfos,
Tetrachlorvinphos, propafos, cyanophos, dichlorofenthion, pyridafenthione, chlorpyrifos, isoxathion, salithion, fensoate,
formothion, mecarbam, DAEP, thiometone,
isothioate, IPSP, phosmet, phosalone, methidathion, methazone, prothiophos, vamidothion, ESP, acephate, trichlorfon, EPN,
Organophosphorus compounds such as cyanofenphos, EPBP, and leptophos. pyrethrin, allethrin, flamethrin,
resmethrin, phthalthrin, phenothrin, permethrin, cyperthrin, speltrin, emparalate,
flucitrinate, cyphenothrin, empenthrin,
fenvalerate, prarethrin, fenfluthrin,
Pyrethroid compounds such as terrarethrin and benfluthrin, propoxar, carbaryl, MTMC, isoprocarb, promecarb, BPMC, turbum, MPMC,
Carbamate compounds such as XMC, methomyl, cartap, tetrahydro-5,5-dimethyl-2-(1H)-
Examples include hydrazone-based compounds such as pyrimidinone-{3-[4-(trifluoromethyl)phenyl]ethenyl}-2-propenylidene}hydrazone and fatty acid salts thereof.

[0007] In the present invention, other than the above-mentioned chemicals, those having a vapor pressure of (3.5 x 10-5 mmHg/20°C or higher) can be used.

[0008] In the present invention, the terpenes include α,
β-pinene, α,β-terpenol, sydrene, sidrol, camphene, cadinene, camphor, limonene, cineole, menthol, juzin, sapinene, hinokitiol, linalool, terpene alcohol compounds, terpene ether compounds, terpene aldehydes and terpene chloride compounds.

In the present invention, the plant essential oils include essential oils of plants of the cypress family, cypress oil, cedar oil, red cedar oil, juniper oil, asuna oil, cypress oil, arborvitae oil, cypress oil, and cypress oil of plants of the pinaceae family. essential oil, abyss oil,
Turpentine oil, pine oil, pine root oil, and essential oils from plants of the cedar family can be mentioned.

The amount of the efficacy enhancer of the present invention to be used is usually 1 to 500 times, preferably 10 to 400 times, the amount of the pest control component.

[0011] Also, the above-mentioned efficacy enhancer and pest control component are mixed in appropriate amounts, and the composition is usually held in a liquid carrier or a solid carrier, and if necessary, emulsifiers, dispersants, hydrating agents, etc.
It can be used in the form of oils, emulsions, wettable powders, sprays, aerosols, liniments, powders, granules, etc. by adding a propellant or the like.

Examples of liquid carriers include water, alcohols such as methyl alcohol, ethyl alcohol, and isopropyl alcohol, ketones such as acetone, methyl ethyl ketone, and cyclohexanone, ethers such as tetrahydrofuran, dioxane, and dimethyl ether, hexane,
Aliphatic hydrocarbons such as kerosene, normal paraffin, and solvent naphtha, aromatic hydrocarbons such as benzene and toluene, halogenated hydrocarbons such as dichloromethane and dichloroethane, and esters such as ethyl acetate and butyl acetate. Can be done.

Examples of the solid carrier include mineral powders such as silicic acid, kaolin, activated carbon, bentonite, diatomaceous earth, talc, clay, calcium carbonate, and ceramic powder, and vegetable matter such as wood flour, soybean flour, wheat flour, and starch. Examples include powder, clathrate compounds such as cyclodextrin, and the like.

[0014] Furthermore, as the emulsifier and dispersant, the efficacy enhancer of the present invention can be substituted, but if necessary, sorbitan fatty acid ester, glycerin fatty acid ester,
Surfactants such as polyethylene glycol fatty acid ester, polyoxyethylene alkylphenyl ether, sulfuric acid ester of higher alcohol, alkylaryl sulfonate, and propellants include liquefied petroleum gas, dimethyl ether, fluorocarbon, fluorocarbon, carbon dioxide, and nitrogen. Examples include gas, laughing gas, etc.

The efficacy enhancer of the present invention is a highly safe compound used in fragrances and the like, and requires less use of highly toxic organophosphorus insecticides. Various commonly used additives such as volatilization rate improvers, deodorants, and fragrances can be optionally added to the pest control composition. Examples of the volatilization rate improver include phenethyl isothiocyanate and dimethyl himix acid; examples of the deodorant include lauryl methacrylate (LMA); and examples of the fragrance include citral and citronellal.

[0016]

[Action] The efficacy enhancer of the present invention exhibits an extremely high synergistic effect especially when mixed with an organic phosphorus compound, and has the effect of disturbing the insects to leave the plant body, thereby activating the behavior of insect pests and increasing the opportunity for them to come into contact with the active ingredient. increases and the control effect increases.

[0017]

EXAMPLES The present invention will be explained in detail below based on Examples, but the present invention is not limited to these Examples.

Formulation Examples 1 to 3 The plant essential oils and/or terpenes shown in Table 1 below are mixed at predetermined mixing ratios to obtain the potency enhancer applicable to the present invention.

[0019]

[Table 1]

[0020]

[Table 2]

[0021]

[Table 3]

[0022] The pest control composition of the present invention was tested for its effect on the Japanese fleas by the following method.

Test method: Five adult Physcomitrella chinensis are placed in a 20 ml glass vial, a paper disk (diameter 7 mm) is treated with a predetermined amount of the drug, and the vial is allowed to stand still at the bottom. The condition of the test insects is recorded over time under 22°C conditions. The test results are shown in Table 4.

[0024]

[Table 4]

Discussion When using the insecticide alone (Comparisons 1 and 2), insecticidal activity was observed after 24 hours, but no change was observed within 5 hours. The potency enhancer alone (Comparisons 3-4) showed fast-acting (
paralysis), but the insecticidal activity was low. Immediate action (paralysis) and insecticidal activity were observed by mixing the insecticide and the efficacy enhancer (proposals 1 to 4).

[0027]

EFFECTS OF THE INVENTION The efficacy enhancer of the present invention exhibits excellent insecticidal effects when used in combination with pest control ingredients as described above. That is, it causes a disturbance effect on pests, improves the contact rate with the pest control component, and controls and kills pests.

Claims (4)

[Claims] 1. A potency enhancer characterized by containing a plant essential oil and/or terpenes as an active ingredient. 2. A pest control composition comprising a pest control component and an efficacy enhancer comprising a plant essential oil and/or a terpene. 3. A potency enhancer characterized by containing as an active ingredient a plant essential oil and/or terpenes that do not have lethal activity in an open space. Claim 4: At least one selected from α-pinene, limonene, benzyl alcohol, vanillin, terpyrun, coumarin, terpinyl acetate, and acetophenone.
An efficacy enhancer characterized by containing at least one species as an active ingredient.