JPH0262805A - Termite-controllling agent for treating wooden portion - Google Patents

Abstract

PURPOSE:To provide the subject controlling agent containing dimethyl(4- ethoxyphenyl) {3-(3-phenoxy-4-fluorophenyl)propyl}silane, having excellent safety for men and livestock, excellent stability in soil and excellent termite-controlling effect. CONSTITUTION:The subject controlling agent contains a compound of the formula or the compound of the formula and [3,4-(methylenedioxy)-6-propylbenzyl]butyl diethyleneglycol ether (B) as an auxiliary in a ratio of 1:1-10. Only the compound B exhibits an excellent effect as a synergist when combined with the compound of the formula, thereby permitting to reduce the compounding amount of the expensive compound of the formula and thence the cost of the subject controlling agent. The controlling agent can be compounded with a termite attractant, any other insecticide, an antiseptic, etc., and the formulation of the controlling agent is generally an oily agent.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to dimethyl (4-ethoxyphenyiv>(3-(
3-phenoxy-4-fluorophenyl (lv)propyl)
This invention relates to a mortar ant control agent for wood treatment, which is characterized by containing silane (hereinafter referred to as compound A).

[Conventional technology]

In recent years, pests that damage wood, such as termites, have become increasingly popular.

Damage caused by crucian carp beetles, flatback beetles, etc. has become a problem, but in order to prevent damage from these pests, the conventional method has been to treat lumber and sub-soil with insect repellents in advance. Organochlorine insecticides such as chlordane and dayledrin have been used as ingredients.

However, these insecticidal and repellent ingredients all have problems in terms of persistence, toxicity, irritation, and environmental pollution, and their use was banned last year, and chlorpyrifos was introduced as an alternative.

Organophosphorus agents such as phoxim have recently been introduced.

[Problem that the invention seeks to solve]

The organophosphorus termite control agents mentioned above have the disadvantage of being easily decomposed in the environment, resulting in poor termite control effects over a long period of time, and also having many safety issues for humans and livestock. There is a strong need for the development of an ant control agent.

[Means and effects for solving the problems] The present inventors have been researching for many years on pyrethros that can be used for this type of purpose, which are characterized by low toxicity, and as a result, we found that cloden,
Compound A was found to be a compound superior to deidrin in terms of insecticidal properties and residual efficacy.

Compound A is being considered for practical use in the field of agriculture and horticulture, as it has high insecticidal activity against insect pests of the order Phosphoroptera, aphids, planthoppers, etc.; This was thought to be due to its low activity.

At that time, we thought that basic insecticidal efficacy tests alone were inappropriate for evaluating the insecticidal and insect repellent ingredients of termite control agents, and when we conducted practical wood treatment tests on various compounds, we found that Compound A had a high rate of preventing insect damage. It has become clear that it is effective.

Compound A has the advantages of rapid action against insects and low toxicity against warm-blooded animals, which are the characteristics of a pyrethroid drug, and at the same time it has an extremely good residual effect.

Furthermore, in view of the fact that Compound A is an expensive insecticide compared to organochlorine membranes, recreational chemicals, and organophosphorus agents, the present inventors developed a mixture of Compound A and a pyrethroid synergist for the purpose of reducing costs. As a result of intensive studies on the effects of cynevirin 500, octachlorodiglobyl ether', MGKL264, M a K -5-fJ 26 on termites,
, Sesame's pyrethroid synergists are all ineffective,
Only the combination of Compound A and [3,4-(methylenedioxy)-6-propylbendiμ]butyldiethyleneguficol ether [hereinafter referred to as piveronyl ptoxide] is particularly effective against termites. The present invention was completed based on the discovery that the following is true.

Previously, it was thought that various pyrethroid synergists would exhibit similar synergistic effects when combined with Compound A, even if there were slight differences, based on test results on flies, mosquitoes, etc. The phenomenon peculiar to ants is completely unexpected from conventional knowledge.

As a result, high insecticidal and insect repellent effects can be obtained even if the amount of compound A is reduced, and the practical advantage in terms of cost is extremely large.

Compound A used in the present invention is represented by the following formula (I) and contains a silicon atom in the molecule.

The termite control agent for wood treatment can contain 0.01 to 90% by weight of Compound A as an insecticidal and insect repellent component, and when mixed with Piperoni A/2)oxide, Compound A exhibits a high synergistic effect. and piveronyl butoxide in a suitable mixing ratio of 3:1 to 1:20 (preferably 1:1 to 1:10).

In addition, a termite attractant may be appropriately added in order to exhibit insecticidal and insect repellent effects more efficiently. Furthermore, the termite control agent for wood treatment of the present invention may include organic phosphorus agents such as chlorpyrifos, phoxim, and pyridafenthione, pyrethroid agents such as vermethrin, fenvalerate 1, and fenpropathrin, or triprobyl, socyanurate, and carbamate agents. Other insecticides, as well as various types of preservatives, such as CCx-based compounds - OCA, COB, etc. - halofonicol-based compounds - bentacro to phenyllaurate, p
-Promo 2.6-Dichlorophenol and other 0 iodopropargyl compounds -xp-1000°3-
O quaternary ammonium compounds and amine salts such as iodo-2-propynylbutyl carbamate.

Benzalkonium chloride, dialkyldimethylammonium chloride, etc.Organotin compounds, -bis-(n-)liptyltin) oxide, triptyltin terephthalate, etc.
A useful multipurpose composition can also be obtained by appropriately mixing zinc naphthenate, xyligen aluminum salt, and the like.

The formulation of the mortar ant control agent for treating wood of the present invention may be various depending on the properties of the control agent and the purpose of use, such as oil, emulsion, irrigation agent, water solvent, powder, or aerosol, but oil is generally used. used. Any of the preparations can be prepared according to a conventional method, and solid carriers include fine powders or powders such as clays (kaolin, bentonites, etc.), talcs, and the like. Liquid carriers include water, alcohol/L'
aromatic hydrocarbons (e.g. toluene, xylene, etc.), aliphatic hydrocarbons (e.g. kerosene, kerosene, etc.),
Esters, nitriles, etc. can be used. Next, as surfactants, alkyl sulfate ester μ, alkyl ps μ
Examples include phonates, alkylarylsulfonates, polyethylene glycol ethers, and polyhydric alcohol esters. In addition, fixing agents and dispersing agents such as casein, gelatin, starch powder, CMC, and polyhinyl alcohol are used as appropriate. Further, by microencapsulating or cyclodextrin inclusion of Compound A used in the present invention, chemical stability can be further increased and residual efficacy can be enhanced.

On the other hand, the same effect as above can be obtained with a mixture of Compound A and piveronyl ptoxide.

The method of applying the mortar ant control agent for wood treatment of the present invention is as follows:
Conventional methods include spraying or foaming emulsions, oils, irrigation agents, powders, etc. on the wood of houses, coating or pressure injection on wood and plywood, and methods such as termite control baits, colored paints, etc. It is also possible to impregnate varnish or the like and apply it as a termite preventive coating.

〔Example〕

EXAMPLES In order to further clarify the usefulness of the present invention, Examples and Test Examples will be described below, but it goes without saying that the present invention is not limited to these.

Example 1 An oil solution was obtained by dissolving 0.2 parts of Compound A and 8 parts of Y-10000 in fume kerosene to make the total 100 parts.

Example 2 01 part of compound AO, 0.4 part of piveronyl butoxide,
and 3-iodo-2-provinylbutylcarbamate 0
．． Propylene glycol monomethyl ether 5
1 part and dissolved in fume kerosene to make a total of 100 parts to obtain an oil solution. The wood to be insect-proofed is dipped in this oil, or the oil is sprayed or applied on the surface.

Example 3 2 parts of compound A, 10 parts of piveronyl ptoxide, 5 parts of Tsurupo, /L/5M-200 (registered trademark of Toho Chemical),
Add 20 parts of Xylo-/I and 63 parts of white kerosene, stir well, mix and dissolve, and obtain an emulsion.

This emulsion is diluted 20 times with water (17), and the wood is immersed in the solution or applied or sprayed on the surface.

2.5 parts of this emulsion is added to 97.5 parts of a phenolic urea and melamine adhesive used for manufacturing plywood, mixed well, and used.

Example 4 1 part of Compound A and 5 parts of Piveroni p-butoxide were dissolved in 25 parts of trioctyl phosphate, 50 parts of vinyl chloride μ raw material resin, 2.5 parts of tribasic lead sulfate, and 16.
Add 5 parts and mix well to obtain a vinyl chloride compound for covering electric wires.

Test example 1 (Wood treatment test @) Based on the standards of the Japan Whitening Prevention Association, a prescribed 1 degree oil of the test agent was applied to a piece of wood (I x I x 2 cm) for 11 hours.
It was applied at a rate of 0 g/yI, and after air-drying for 2 weeks, each was used as a test piece.

Next, one piece of each of these test pieces was placed in the same nest box for termites, and the rate of weight loss due to feeding damage and the condition of the ant trail were observed after 3 weeks.

In the table, the degree of damage indicated by 0 to M is the degree of the number of ant tracks that occurred, and indicates the stage from 0 (no number of ant tracks) to (V) with a significant number of ant tracks.

(Topical application contact test) Acetone solutions of various concentrations of the test drug were locally applied to the backs of domestic termites using a microsyringe, and the basic efficacy of the drug upon contact was determined from the mortality rate after 24 hours.

When exterminating sanitary pests such as flies, mosquitoes, and cockroaches, the most important factors are the knockdown effect and subsequent lethal effect caused by contact with or ingestion of chemicals, but exterminating termites is completely different from sanitary pest extermination.

In other words, termites live in groups by digesting cellulose with the help of symbiotic protozoa and eating each other's excreta to maintain this quality, so killing one or several termites is not effective in controlling them. It won't happen. In addition, termites use excrement and clay to create nests and ant trails, and live mainly underground, so they rarely attract attention like sanitary pests, so it is difficult to wipe out the entire termite nest. In other words, the ultimate role of termite control agents is to protect wood and buildings from termite damage. Therefore, although the local application contact test may serve as a guide for efficacy evaluation, it alone is meaningless; instead, a method of placing wood chips treated with the test chemical in a termite habitat and observing the feeding damage (
The wood treatment test in Test Example 1) has been established as the anti-termite effectiveness test method by the Japanese White Ant Countermeasures Association.

The test results showed that Compound A was superior to other pyrethroid agents (&2-4) and organophosphorus agent (A5;
Although the efficacy was lower than that of phoxim), it showed the highest anti-feeding effect in the wood treatment test, and was effective as a termite control agent.
Its usefulness as an insect repellent ingredient has been revealed.

(According to the Japan White Ant Countermeasures Association standards, a weight loss rate of 3% or less is considered acceptable.) On the other hand, another pyrethroid, vermethrin, showed high activity in a local application contact test, but had no effect on preventing feeding damage. It was considerably inferior to Compound A. One of the reasons for this is that vermethrin is susceptible to decomposition in the environment, indicating the need for practical comprehensive evaluation when developing termite control agents.

Test Example 2 An acetone solution of a test drug prepared by adding three times the amount of various pyrethroid synergists to Compound A was applied with a microsyringe to the backs of house termites, the thoracic back plate of adult house flies, and the backs of Spodoptera japonica, and 48 hours later. The synergistic effect of the insecticidal power of the synergist was examined from the mortality rate of the insects, and the results were as follows.

Chlorpyrifos, an organophosphorus agent, was used as a control agent.

As a result of the test, it was revealed that the combination of Compound A and piveronyl ptoxide, which is a pyrethroid synergist, exhibits a high-μ synergistic effect specifically against the domestic termite.

On the other hand, in the case of the control drug chlorpyrifos, little difference in the synergistic effect was observed depending on the type of synergist or the type of insect tested.

A similar trend was observed for Yamato termites.

Test Example 3 In Test Example 2, the specific synergistic effect of biveronyl butoxide against the Japanese termite was clarified, so a wood treatment test was conducted using the following test oil according to Test Example 1, and the following results were obtained. It was like that.

As a result of the test, the addition of piveronyl butoxide to Compound A significantly enhanced the feeding damage prevention effect in the wood treatment test, indicating that piveronyl butoxide is effective in reducing the concentration of Compound A. confirmed. The mixing ratio of compound A and piveronyl butoxide is a weight loss rate of 3%.
Judging from the following criteria for passing, if the concentration of compound A is 0.1%, l:1 to 1:2;
In the case of 0.05%, a sufficient effect was obtained with a ratio of 1:1 to 1:10. Furthermore, when the mixing ratio of Compound A and piveronyl butoxide was 1:20, the efficacy did not increase to a degree proportional to the amount of piveronyl butoxide added.

〔Effect of the invention〕

The mortar ant control agent for wood treatment of the present invention is safer for humans and livestock than conventional organophosphorus-based mortar ant control agents for wood treatment.
The present invention provides an extremely useful pest control agent with excellent stability in soil and termite control effects.

Claims (2)

[Claims] (1) Dimethyl (4-ethoxyphenyl) {3-(3-
A termite control agent for treating wood, characterized by containing phenoxy-4-fluorophenyl)propylsilane. (2) Claim No. 1, characterized in that it contains [3,4-(methylenedioxy)-6-propylbenzyl]butyl diethylene glycol ether as an auxiliary agent.
The termite control agent for wood treatment described in section 1).