JPH04321602A - Method for controlling insect pest growing in purifying tank - Google Patents

Abstract

PURPOSE:To control insect pests with effects stable for a long period using a small amount of an inset pest controlling ingredient by spraying a persistent foamy agent containing the insect pest controlling ingredient on a sludge present on the water surface and the surface of a purifying tank. CONSTITUTION:An insect pest controlling ingredient, preferably an insect growth controlling agent (e.g. diflubenzuron) and an organic phosphorus-based insecticide (e.g. fenitrothion) or a pyrethroid-based insecticide (e.g. permethrin) are used in combination or a solvent, a foaming agent, a foaming adjuvant, water, etc., are homogeneously dispersed and air is forcibly sucked to provide a foamy state. The resultant foamy agent is sprayed or an aerosol prepared by sealing the aforementioned ingredient together with a propellant in a pressure-resistant vessel is used and sprayed. Thereby, persistent foams are formed on a sludge present on the water surface and the surface of a purifying tank. The foamy agent is sprayed and spraying treatment of the liquid insect pest controlling ingredient in a upper space of the purifying tank is simultaneously carried out to exterminate imagoes which already eclosed and are flying. As a result, growth cycles can be cut off to improve fast-acting properties of the chemical and stably control the insect pests for a long period.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling pests occurring in septic tanks using pest control components.

0002

[Prior Art] Traditionally, pest control treatments that occur in septic tanks include (A) a method of hanging and exterminating a transpiration agent such as the highly volatile organic phosphorus insecticide dichlorvos, and (B) a method of spraying emulsions, granules, etc. methods were commonly used.

0003

[Problem to be solved by the invention] In method (A), only adult insects are targeted, but since the spraying is not forcibly used to exterminate adult insects, it does not reach all the adults in the infested area, and the behavior of pests is The components of dichlorvos decompose slowly and rapidly in alkaline air, and the pest control components are not incorporated, resulting in insufficient efficacy. Furthermore, this method was not expected to be effective against the larvae and pupae living on the surface of the septic tank. In the method (B), the insect pest control components are initially introduced into the septic tank, so the insect pest control components flow out together with the flowing water. In addition, in this method, the larval and pupal stages of pests live on the water surface, but the amount of pesticide used for pest control is determined based on the amount of water in the entire septic tank, so a large amount of pest control ingredients must be added, which is harmful to the environment. The impact was also large. Furthermore, in the aerobic decomposition part of the aeration tank of a septic tank, if the concentration of insecticidal components as pest control components or their decomposition products is high, there is a high possibility that the purification microorganisms will be affected and the purification function will be inhibited.

0004

[Means for Solving the Problems] The present invention was made to solve the above-mentioned problems, and focused on the fact that most of the pests that occur in septic tanks grow in their larval stage on the surface of the septic tank. In addition, as a method to maintain the effectiveness of pest control ingredients for a certain period of time without temporarily treating the pest control ingredients in high concentrations in septic tanks, a long-lasting foam agent containing pest control ingredients is sprayed on the surface of the septic tank and a foam film is created. We have completed a method for controlling pests in septic tanks by supplying pest control ingredients. Furthermore, in practical terms, the pests in the water and sludge on the surface of the septic tank can be controlled by the above method, and the population will decrease, but for adult insects that have already emerged and are flying, the above method can be used to control them. There is no opportunity for insect control ingredients to be taken in except through contact with the treated foam film, and the pest control efficiency is poor. Therefore, by temporarily supplying a spray treatment in which a liquid pest control ingredient is sprayed into the upper space of the septic tank, the adult insects are exterminated and the growth cycle is interrupted, increasing the quick-acting effect of the chemical and stably controlling pests for a long period of time. It was discovered that the pests can be controlled, and the present invention was completed based on this knowledge. That is, the present invention provides a method for controlling pests occurring in a septic tank, which is characterized by spraying a long-lasting foam containing a pest control component onto the water surface of a septic tank and sludge on the surface, and a long-lasting foam containing a pest control component. The present invention provides a method for controlling pests occurring in a septic tank, which comprises spraying a foaming agent onto the water surface and sludge on the surface of the septic tank and spraying a liquid pest control component.

The present invention will be explained in detail below. As a method of providing a long-lasting foam containing pest control ingredients to the water surface of a septic tank and sludge on the surface, pest control ingredients, solvents,
It is also possible to use an aerosol in which a foaming agent, a foaming auxiliary agent, water, etc. are uniformly dispersed, and the air is forcibly sucked into the foam and then dispersed, or an aerosol sealed in a pressure container together with a propellant can be used. As a method of producing a persistent foam, there is a method of forming a water-insoluble coating film by blending a higher fatty acid and/or a higher alcohol, or an alkanolamine salt thereof with a foaming agent. The higher fatty acid and higher alcohol preferably have 10 or more carbon atoms, such as lauric acid, myristic acid, stearic acid, lauryl alcohol, and myristyl alcohol. The pest control ingredients are not particularly limited, and desirably include insect growth regulators such as diflubenzuron, chlorfluazuron, and pyriproxyfen, and organophosphorus insecticides such as fenitrothion, fenthion, or permethrin and phenothrin. Concomitant use of pyrethroid insecticides may be mentioned. Further, the liquid pest control component of the present invention is preferably sprayed with fine particles in order to be well dispersed in the upper space of the septic tank, and a ULV sprayer or the like can be used. Further, a vapor tap valve that can spray 1 ml to 2.5 ml per second of aerosol and can be used upside down or a valve that can continuously spray can be used. Liquid pest control ingredients include organophosphorus insecticides (fenitrothion, phenothrin, chloropyrifos-methyl, etc.), carbamate insecticides (carbaryl, propoxur, etc.), pyrethroid insecticides (natural pyrethrin, permethrin, etc.)
(phenothrin, allethrin, resmethrin, fenvalerate, etc.) can be used.

[0006]

[Examples] The present invention will be explained below with reference to Examples. (Example 1) Foaming agents A, B, C, and D, whose formulation examples are shown in Table 1, were applied to the water surface and sludge of the septic tank under the conditions shown in Table 2.
The pests were uniformly sprayed at a rate of 0 to 50 ml/m2 and the pest outbreak status was examined.

[Table 1]

[0007]

[Table 2] (Note 1) Commercially available fenthion granules (5%) 10-20g/
m2 −: No adult insects +: When you look closely, you can see them ++: There are many adults
, 4 did not show much difference compared to control group 5 one week after implementation, but showed good results up to three months later. In other words, although the conventional method is effective for a short period of time within one month after treatment, it is not possible to prevent the occurrence of pests for a long period of time. The method of spraying the agent had better results compared to the conventional method.

(Example 2) In the method of the present invention for use in a septic tank where immediate extermination of adult insects is required, a foaming agent containing pest control ingredients is sprayed onto the water surface or sludge of the septic tank, and then Furthermore, a pest control component is sprayed from above areas where adult pests are found, such as settling tanks and excess sludge tanks, using a liquid aerosol. Formulation example E: Permethrin 1%, remaining alkylbenzene, propellant LPG F: Dichlorvos 3%, remaining white kerosene, propellant CFC 11
At the same time, Table 3 shows the results of a comparison between the liquid agent alone, the existing dichlorvos transpiration agent, and the untreated area.

[0009]

[Table 3] −: No adults present +: Adults present if you look closely ++: Saw in large numbers +++: Many adults present The method of the present invention, which uses a long-lasting foam agent and a liquid agent, provides fast-acting and long-term control. I was able to do this.

0010

[Effects of the invention] Conventional methods of spraying insecticides or installing transpiration agents are either only effective for a short period of time because the pest control ingredients are washed away, or are not sufficiently effective because the pest control ingredients do not reach all pests. In order to use a larger amount of pest control ingredients than necessary, repeated spraying was required, resulting in a lot of labor and economic waste. However, by using the method of the present invention to cover the surface of the pest control area with a long-lasting foam agent and supplying the insect pest control component, less chemicals are wasted due to washing away, and a small amount of the pest control component can provide stable efficacy over a long period of time. This has been improved. Furthermore, the method according to the present invention can also be used in septic tanks such as restaurant septic tanks that require immediate effectiveness.
By combining the above-mentioned method of spraying a long-lasting foam agent and then applying a liquid pest control component to the space above the area where the insects are infested, it is possible to stably suppress the outbreak of pests over a long period of time.
A wide range of septic tank management is now possible.

Claims (2)

[Claims] 1. A method for controlling pests occurring in a septic tank, which comprises spraying a long-lasting foam containing a pest control component onto the water surface of the septic tank and the sludge on the surface. [Claim 2] A persistent foaming agent containing a pest control component is sprayed on the water surface of the septic tank and the sludge on the surface, and a liquid pest control component is sprayed into the upper space of the septic tank. How to control pests.