JP2000228938A - Insect-attracting pasty poison bait agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insect-attracting pasty poison bait agent which easily gives a softness degree suitable for the willing intakes of various insects, has high solubility for insect-attracting substances, insecticidal ingredients, and the like, and has good storage stability and good handleability. SOLUTION: This insect-attracting pasty poison bait agent is obtained by mixing an insect-attracting agent with an insecticidal ingredient and polyethyelne glycol. Therein, the polyethylene glycol is added in an amount of 1-50 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition of a paste-like insect attractant bait for controlling harmful insects living in human life.

[0002]

2. Description of the Related Art Conventionally, as a method of controlling harmful insects inhabiting human living areas, methods such as spraying insecticides, setting up attracting traps, and setting up attractant poison baits have been adopted. In particular, the method of installing the attractant bait is widely used because it is excellent in selectivity, cost and environment of target insect species. In other words, in the case of a method of installing a poison bait, since it depends on means for attracting insects, it is only necessary to mix an attractant compatible with various insects in the bait bait, and a special structure is not required for a device therefor. . In addition, since the object is achieved by feeding the minimum required amount of the insecticide, it is economical to use the compounding agent because there is little waste and the amount of the pesticide remaining or flowing out can be minimized. Therefore, the influence on the use environment is small.

[0003] In addition, in the method of installing the attractant poison bait, the form of the attractant poison bait is conventionally known as a granular or granular solid, a gel or a paste or other semi-solid.
There are also other liquid types. In this method, insects are exterminated by feeding an attractant poison bait. For this reason, it is considered that a semi-solid attractant poison bait containing a suitable amount of water and having good ingestibility is suitable. Also, in terms of use, the semi-solid attractant poison bait is excellent because it does not easily flow out of the device.

A conventional semisolid attractant poison bait is prepared by kneading an insect attractant and water and the like under heating to form a paste, or an insect attractant and gelatin, carrageenan, polyvinyl alcohol, etc. Was dissolved under heating, and this was gelled at room temperature.

[0005]

However, the softness of the above-mentioned paste-like attractant bait greatly depends on its water content, so that it can be adjusted to a softness suitable for insect feeding. It is difficult, and there is a drawback that water evaporates during use and the surface is hardened, and its effectiveness is rapidly reduced. Also,
Many insect attractants have a high water activity, such as flour and syrup. If the water content in the attractant poison bait is increased, the insect attractant contained therein tends to rot. As a result,
Storage stability becomes insufficient.

[0006] The above-mentioned gelling agent attractant poison has the disadvantage that the overall softness is reduced after gelation, and that the feeding rate of some insects is low.

[0007] Accordingly, the present invention provides a variety of insects that can easily obtain softness suitable for ingestion, enhances the solubility of components such as insect attractants and insecticidal components, and preserves storage stability. It is an object of the present invention to provide a paste insect attractant poison bait with good handleability.

[0008]

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention relates to a paste insect attractant poison bait as follows. That is, it is characterized by mixing an insect attractant, an insecticidal component, and polyethylene glycol.

In the above constitution of the present invention, the insect attractant poison bait can be obtained as a paste-like soft food by blending polyethylene glycol. In addition, polyethylene glycol is water-soluble because it has a hydroxyl group at its end, and exerts a solubilizing effect on insect attractants as well as a wetting, dispersing, and suspending effect, and also against insecticides. Has a suspending and dispersing action. In addition, polyethylene glycol has no repellent effect on insects.

The softness of the insect attractant bait described above is as follows:
It depends on the difference in average molecular weight of polyethylene glycol. Therefore, by selecting polyethylene glycols having different average molecular weights or by mixing two or more kinds thereof, the softness of the insect attractant poison bait can be appropriately adjusted.

In the insect attractant bait of the present invention, the polyethylene glycol which can be blended has an average molecular weight of 200
In the range of ２０20,000. For polyethylene glycol, according to those having an average molecular weight in the range of 200 to 400, those having a high softness and a flowable paste form,
Further, according to those having an average molecular weight in the range of 600 to 1540, pastes having a moderate softness are used, and according to those having an average molecular weight in the range of 4000 to 20,000, those having a small softness are used. can get. Moreover, about these paste-form agents, water can be mixed suitably and softness can be raised.

The softness of the insect attractant bait can also be adjusted by adjusting the amount of polyethylene glycol. The amount of polyethylene glycol is in the range of 1 to 50% by weight in the insect attractant bait of the present invention. If the amount is less than 1% by weight, the desired softness for insects to eat may not be obtained, and if the amount is more than 50% by weight, the softness becomes too small and the insects become too soft. This is because the effect of attracting the insects decreases, and the amount of the insecticidal component decreases, so that effective insecticidal power cannot be obtained.

As the insect attractant, a general substance suitable for attracting various target insects can be used. For example, sugar, sucrose, fructose, glucose, refined sugars such as lactose, fruit juice, sugarcane squeezed juice, honey,
Natural sugars such as waste sugars, purified proteins such as amino acids and proteins, natural proteins such as eggs, pupa flour, katsuobushi and soybeans, purified oils and fats such as linoleic acid, linolenic acid and oleic acid, beef tallow, salad oil and fish oil Examples include natural fats and oils. These can be used alone or in combination of two or more in accordance with the target insect.

Further, regarding the amount of the insect attractant,
It depends on the type of this substance and the type of target insect, and it is not absolutely determined.For example, when the target insect is ants or cockroaches, for sugars such as sugar and pupa flour,
It can be preferably added to the attractant poison bait in the range of 20 to 40% by weight.

As the insecticidal component, a known drug having a small insect repellent effect and an excellent insecticidal activity can be used. These include, for example, pyrethroid insecticides such as permethrin, phenothrin and resmethrin, organophosphorus insecticides such as fenitrothion, carbamate drugs such as phenocarb, and inorganic drugs such as boric acid, and juvenile hormone-like substances. Insect growth regulators such as substances and molting inhibitors are also included.

The amount of the insecticidal component varies depending on the kind of the target insect and cannot be unconditionally determined. However, when the target insect is an ant or a cockroach, 0.0001 to 40 wt. % Can be preferably added.

Further, the insect attractant bait of the present invention may contain a gelling agent such as gelatin, carrageenan or polyvinyl alcohol as an optional component as long as the performance of the above-mentioned essential components is not impaired.

The insect attractant bait of the present invention can be obtained by the following production method. First, when polyethylene glycol is a fluid having an average molecular weight of 200 to 400, an insecticidal component and water are mixed with the polyethylene glycol to form a liquid mixture. Next, this liquid mixture is mixed into an insect attractant and kneaded.

If the polyethylene glycol has an average molecular weight of 600 or more, it is dissolved in advance by heating. When the insect attractant is composed of two or more kinds, the two or more kinds of substances are uniformly mixed in advance before mixing the liquid mixture.

The insects to be controlled by the insect attractant bait of the present invention include ants, cockroaches, weevils, beetles, beetles, flies, and the like, and also include duckweeds, centipedes, slugs, and the like.

[0021]

EXAMPLES (1) Preparation of insect attractant poison bait as a sample An insect attractant poison bait was obtained using the components shown in Table 1.

[0022]

[Table 1] In Table 1, wheat flour, pupa flour, rice bran, fish meal, sugar, and corn starch are insect attractants. Also, PEG
Is polyethylene glycol, and its attached number is
Average molecular weight. Sumithion is an organophosphorus insecticide whose chemical name is fenitrothion.

First, the insect attractants were mixed in the proportions of Examples 1 to 4 shown in Table 1 to obtain feed mixtures. Separately, PEG 4000 was dissolved by boiling in a boiling water bath. In this solution, PEG200, the insecticide Sumithion and water were mixed in the proportions shown in Table 1 to obtain a dispersion mixture. This dispersion mixture was mixed into the feed mixture described above. This was kneaded at room temperature to obtain the insect attractant baits of Examples 1 to 4, respectively.

Each of the resulting insect attractant poison baits exhibited a moderately soft paste in which all the components contained were uniformly dispersed. In addition, each of the obtained insect attractant poison baits of about 1.
5 g is stored in a Petri dish (5 cm in diameter)
As a result of being left indoors for 7 days under the environmental condition of 25 ° C., each insect attractant poison maintained its paste-like property, and almost no change was observed in the softness.

Table 2 shows a comparative example.

[0026]

[Table 2] In Comparative Example 1, an insect attractant such as flour was mixed in the same manner as described above to form a feed mixture, and at normal temperature, Sumithion and water were further mixed and kneaded. Comparative Example 1
The kneaded material was clay-like. In Comparative Example 2, a mixture of gelatin and carrageenan was dissolved by heating at a temperature of about 70 ° C., and a mixture of sumithion and water was added to the solution, and the mixture was poured into the above-mentioned feed mixture and kneaded. Things. The kneaded material of Comparative Example 2 was slightly softer than the kneaded material of Comparative Example 1, but still exhibited clay-like properties. (2) Next, about 1.5 of the insect attractant poison bait A of the above (1).
g as a sample, in the form shown in FIGS.
Housed within. That is, the container 10 includes the receiver 11 and the lid 1
5 The receiver 11 has four protrusions 13 formed on the bottom 12 surface. These projections 13 are provided at equal intervals at symmetrical positions.

The insect attractant bait A, as shown in FIG.
The projections 1 are in close contact with the bottom 12 surface.
3 is supported. Therefore, even if the insect attractant poison bait A stored in the container 10 is shocked during handling such as transportation, the storage position does not shift.

In the receiver 11, lower inlets 14 are formed on the side surface thereof at equal intervals at symmetrical positions. The lower edges of these lower entrances 13 are located at the bottom 12 surface, so that insects can directly enter. Further, the lower entrance 13 is formed relatively small so that small insects such as ants can easily enter and exit. An upper entrance 16 is formed at the center of the upper surface of the lid 15. The upper entrance 16 is formed relatively large so as to be suitable for entry and exit of cockroaches and the like. (3) Next, the container 10 containing the insect attractant poison bait A as a sample is placed in the enclosure 20 (210) as shown in FIG.
× 250 × 100 mm).
Further, the shelter 21 is formed by folding a paper material into a fold shape, and a plurality of triangular portions formed on the side surfaces thereof are used as the entrances 22 respectively. In addition, water stick 23
One container was arranged corresponding to each container 10.

Twenty adults of German cockroaches (10 males and 10 females) were released into the enclosure 20 and tested for attracting effect to insect attractant bait A at room temperature for 7 days.
The index of the attracting effect was based on the weight change of the insect attractant poison A before and after the test. In addition, in order to prevent weight change due to insect saliva and moisture absorption, the sample was dried for 12 hours by a hot air dryer at a temperature of 60 ° C. before the test.

This test was carried out in Examples 1 to 4 and Comparative Examples 1 to
The test was performed on two samples, and the results are shown in Table 3.

[0031]

[Table 3] From the results shown in Table 3, according to the insect attractant bait of Examples 1 to 4 of the present invention, the amount of consumption was 2 times that of Comparative Examples 1 and 2.
It is understood that the effect of attracting the German cockroach is extremely high. (4) Next, the container 10 containing the insect attractant poison bait A
Were placed 10 cm apart around the brown ant nest. Ants have the property of letting their nest members know when their favorite bait is nearby. The number of ants gathered by this property was used as an index of the attracting effect.

The test starts at the time when the first ants begin to enter the container 10, and the number of ants existing in the container 10 every 5 minutes after the start of the active period thereafter Was counted, and the counted value was shown as an argument. After that, the invites were similarly counted every 10 minutes afterwards. FIG. 4 shows the characteristics of the temporal change of the invitation parameter.
In FIG. 4, the characteristic a is the case where the insect attractant bait of Example 2 is used as a sample, and the characteristic b is the case where the insect attractant bait of Comparative Example 1 is used as a sample.

Comparison of the characteristics a with the characteristics b confirms that the characteristic a with the insect attractant bait of the present invention exceeds the number of ants over most of the test time. In particular, 30 days after the start of the active counting of ant activities
The count is greatly open between minutes and 60 minutes. These results indicate that the insect attractant bait of the present invention has an extremely high attracting effect on ants.

[0034]

As described above, since the present invention is constituted, the following effects are exhibited. First, the insect attractant poison bait of the present invention can be obtained as a paste having a softness preferred by insects by a composition comprising an insect attractant, an insecticide and polyethylene glycol as essential components. Can be increased.

Further, the paste-like nature of the insect attractant poison bait according to the present invention allows the insect attractant bait to be stably housed in an insecticidal container, thereby facilitating handling such as transportation and the container. Can be simplified, so that it is possible to commercialize it at low cost. Further, since the stability is maintained over time, the storage stability is also ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view of a container that stores an insect attractant poison bait of the present invention.

FIG. 2 is a longitudinal sectional front view of the same.

FIG. 3 is a plan view of the test apparatus.

FIG. 4 is a characteristic diagram of an argument for a termite;

[Explanation of symbols]

 A insect attractant poison bait 10 container 11 receiving part 13 projection 14 lower entrance 16 upper entrance

Claims (2)

[Claims] 1. A paste-like insect attractant bait comprising a mixture of an insect attractant, an insecticidal component, and polyethylene glycol. 2. The paste insect attractant poison according to claim 1, wherein polyethylene glycol is mixed in an amount of 1% by weight or more and 50% by weight or less.