MXPA97001506A

MXPA97001506A - Insec controller

Info

Publication number: MXPA97001506A
Application number: MXPA/A/1997/001506A
Authority: MX
Inventors: Ishiwatari Takao
Original assignee: Sumitomo Chemical Company Limited
Priority date: 1996-02-29
Filing date: 1997-02-27
Publication date: 1998-10-30

Abstract

The present invention relates to: An insect controller in which at least one volatile insecticidal compound or an insect repellent compound without heating is transported on a support with at least one through hole. The use of a volatile insecticidal compound or an insect repellent compound without heating can ensure satisfactory insect controlling effects. If a specific structure, for example a folded structure is used for insect control, the evaporation of waste from the volatile insecticide compound or insect repellent can be reduced while not in use.

Description

INSECT CONTROLADQR FIELD OF THE INVENTION The present invention relates to an insect controller and more particularly to a controller for destroying or repelling harmful insects. The present invention provides a simple means of controlling harmful insects without heating, unlike conventional mosquito coils, electric mosquito mats and devices having an insecticidal liquid and a wick, wherein the bottom of the wick is immersed in the insecticide liquid and the top of the wick is heated with an electric heater. Among the insect controllers of the present invention are those which can be used as interior trim.

BRIEF DESCRIPTION OF THE INVENTION The present invention provides an insect controller comprising a volatile insecticide or an insect repellent compound without heating, which is carried on a support with at least one through hole.

REF: 24198 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of an insect controller of the present invention. Figure 2 is a perspective view of another insect controller of the present invention. Figures 3a and 3b are a sectional view and a side view, respectively, of yet another insect controller of the present invention. Figures 4a and 4b are perspective views of yet another insect controller of the present invention. In the insect controller, the bent support as shown in Figure 4a can unfold by rotating the flat members in opposite directions around a fixed axis on a side edge of the flat members, for example at an angle of 180 ° as it is shown in Figure 4b, which represents a form of the insect controller during use. Figures 5a and 5b are perspective views of yet another insect controller of the present invention. In the insect controller, the bent support as shown in Figure 5a can be unfolded by parallel spacing of the flat members in opposite directions as shown in Figure 5b.

DETAILED DESCRIPTION OF THE INVENTION The insect controller of the present invention comprises a volatile insect repellent or insecticide compound without heating, which is supported on a support with at least one through hole. For the insect repellent or volatile insecticide compound without heating, which is used in the present invention, the vapor pressure at 20 ° C is preferably 1.0 x 10"4 mmHg or greater.The typical examples of the insect repellent compound or volatile insecticide include volatile pyrethroid compounds without heating, such as empentrin, transflutril and l-ethynyl-2-fluoro-2-pentenyl 3- (2, 2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate, as well as repellent compounds. volatile insects without heating, such as carane-3, 4-diol, N, N-diethyl-m-toluamide and 2- (2-hydroxyethyl) -1-pyridinecarboxylic acid 1-methyl-n-propyl, which has a high pressure of vapor at 20 ° C in the range of 1.0 x 10"4 mmHg to 5.0 x 10" 2 mmHg The support used in the present invention can have any shape, as long as it is provided with at least one through hole to ensure ventilation It is preferred that the support has a plurality of through holes. The preferred form of the support has a surface area to volume ratio in the range of 1 to 20 cm "1. The term" surface area "as used herein, refers to the total area of the exterior and interior surfaces. of a support, which are exposed to air.The term "volume" as used herein, refers to the volume determined by the external contour of a support.The typical examples of the shape of the support include a bundle of cylindrical tubes. As shown in Figure 1, a roll shape with a gap as shown in Figure 2; and a folded paper form as shown in Figure 3. The preferred form of the backing used in the present invention may have a folded structure with a plurality of through holes. Typical examples of such a preferred form of support include a shape as shown in Figures 4a, and 4b, which is well known as a paper toy (commonly called "Denguri" among wholesale toy stores). in the city of Osaka). In this form, a paper support having a honeycomb structure with tubular-through holes, is interspersed between the flat members which may be unfolded or bent by the rotation of the flat members in opposite directions, around a fixed axis on a plane or a lateral edge of the flat members at an angle of 0o to 360 °. Another example of the insect controller of the present invention is shown in Figures 5a and 5b. In the insect controller, a paper support having a honeycomb structure with tubular through holes is interposed between the flat members, which may be bent or unfolded by the parallel movement of the flat members in the opposite directions (i.e. , by an approach or separation of the flat members). In the insect controller having a pair of flat members as shown in Figures 4a, 4b, 5a and 5b according to the present invention, the flat members are usually made of thick paper, resins or other materials. The support used in the present invention can be made of resin films such as polyethylene and polyvinyl chloride, paper, fabrics or other materials. In the case of a paper backing, the use of relatively soft paper is preferred in view of the easy manufacture and impregnation of an insecticidal or insect repellent compound. The insect controller of the present invention can usually have a volume of about 200 to about 10000 cm3. It can be adapted to be used as an interior ornament by the application of patterns, appropriate colors and other characteristics. For the support with a plurality of through holes, it may be preferable to have about ten to about one hundred through holes each having a vertical cross-sectional area of about 0.5 to about 10 cm2. In an insect controller having a support with a plurality of through holes according to the present invention, there is no need to ensure that these through holes are of the same size. They can be adapted to be used as an interior ornament by combination of the through holes of different sizes, or by the application of patterns, appropriate colors or other characteristics. The amount of the volatile insecticidal compound or insect repellent compound without heating, which is carried on the support, may vary with the kind of compound employed, the circumstances of use and the number of insect controllers applied. However, in general, satisfactory results are obtained when the insect repellent compound or volatile insecticide compound is transported in an amount of about 0.1 to about 100 g on the carrier in each insect controller. The insect controller of the present invention can be used for the control of mosquitoes, flies and other dangerous insects by placing 1 to several controllers in an appropriate place or places within a building such as houses, offices or warehouses, or depositing even more drivers in a larger space. In the case of an insect controller of the folded type according to the present invention, it is usually placed in an unfolded state and then placed in a desired location. When an insect controller of the folded type according to the present invention is used the evaporation of the volatile insecticidal compound or the insect repellent compound can be adjusted by changing the angle or degree of support without bending. While the insect control of the present invention is not in use, the evaporation of waste from an insecticidal compound or insect repellent can be reduced by bending the insect controller's support, which makes it possible to maintain the effects that control the insect for a long time.

Examples The present invention will be further illustrated by the following examples; however, the present invention is not limited to these examples.

Example 1 First, 20 ml of a 5% (w / v) solution of 1R-trans-3- (2, 2-dichlorovinyl) -2, 2-dimethylcyclopropancarboxylic acid l-ethynyl-2-fluro-pentenyl in acetone is uniformly applied to 32 cylindrical tubes made of filter paper each having a diameter of 2 cm and a length of 6. 5 cm, followed by drying. These cylindrical tubes form a bundle with a chain such that the vertical cross-sectional contour becomes an unequal circle as shown in Figure 1, which produces an insect controller of the present invention. The surface area to volume ratio of the insect controller was approximately 3.0 cm "1.

Example 2 An insect controller of the present invention is obtained in the same manner as described in Example 1, except that a 20% solution (w / v) of 1S, 3S, 4S, 6R-carane-3, 4- diol in acetone, is used in place of the 5% (w / v) solution of lR-trans-3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate of l-ethynyl-2-fluoro-2- pentenyl in acetone. The preparation of an insect controller used for comparison in the following Test Example (Example 3) is described as Reference Example 1.

Reference Example 1 First, 20 ml of a 5% (w / v) solution of 1R-trans-3- (2,2-dichlorovinyl) -2, 2-dimethylcyclopropanecarboxylic acid l-ethynyl-2-fluoro-2-pentenyl in acetone, it is applied uniformly to a cylindrical tube made of filter paper, which has a diameter of 13 cm and a height of 6.5 cm, followed by drying, which produces an insect controller for comparison. The surface area to volume ratio of the insect controller was approximately 0.62 cm "1.

Example 3 In the center of a test room measuring 28 m3 in size (4.3 mx 2.65 mx 2.45 m in height), the insect controller obtained in Example 1 or Reference Example 1 was hung in such a way that its lower part was located at a height of 1.2 m from the floor. In the horizontal position of 60 cm to 180 cm separated from the insect controller, two nylon boxes (cylindrical shape having a diameter of 30 cm and a height of 20 cm) for each distance, ie four nylon boxes in total, containing 20 female adults of the common mosquito (Culex pipiena pallens) are hung in such a way that their external parts are located at a height of 60 cm from the floor. After 60 minutes, the number of mosquitoes knocked down is counted and the knockdown rate (%) is determined. During the test, an electric fan is placed directly below the insect controller to agitate the air in the room and a board is provided on top of the electric fan, such that the wind from the electric fan does not flow directly against the insect controller. The results are shown in Table 1.

TABLE 1 Example 4 The same test described in Example 3 is carried out by replacing female adults of Culex pipiens pallens with those of Aedes aegypti. , and the knockdown rate (%) is determined after 30 minutes. Results are shown in table 2.

TABLE 2 Example 5 First, 10 ml of a 10% (w / v) solution of 1R-trans-3- (2,2-dichlorovinyl) -2,2-dimethylcyclopropanecarboxylate of l-ethenyl-2-fluoro-2-pentenyl in acetone, they are applied to a paper for impregnation, followed by air drying. The impregnated paper is used, together with a pair of flat members each having a rectangular shape of 7.3 cm x 6.5 cm, in size, to prepare a controller an insect having a shape as shown in Figures 4a and 4b, in which a paper support having a honeycomb structure with tubular through holes is sandwiched between the flat members. The insect controller has 20 folds provided between the flat members, such that it can be unfolded about a fixed axis on a side edge having a length of 6.5 cm at an angle of 0 ° to 360 °. The following test was carried out using the insect controller. In the center of a test room of 28 m3 (4.3 mx 2.65 mx 2.45 m height), the insect controller obtained in the above is hung in such a way that it is unfolded around a fixed axis on a side edge that has a length of 6.5 cm at an angle of 360 ° and its lower part is located at a height of 1.2 m from the floor. In the horizontal position of 60 cm or 180 cm away from the insect controller, two nylon boxes (cylindrical in shape with a diameter of 30 cm and a height of 20 cm) for each distance, ie four nylon boxes in total , which each contain 30 female adults of the common mosquito (Culex pipiens pall ens) are hung, in such a way that their lower parts are located at a height of 60 cm from the floor. After 60 minutes, the number of mosquitoes knocked down is counted and the knockdown rate (%) is determined to be 100%.

Example 6 The same test that was described in Example 5 is carried out by replacing the female adults of Culex pipiens pallens by those of Aedes aegypti. As a result, the knockdown rate (%) after 60 minutes was determined to be 100%.

Example 7 An insect controller having a shape as shown in Figures 4a and 4b is prepared in the same manner as described in Example 5, except that the concentration of lR-trans-3- (2,2-dichlorovinyl) - 2, 2-dimethylcyclopropane carboxylate of l-ethynyl-2-fluro-2-pentenyl in acetone is changed from 10% to 20%. The following test was carried out using the insect controller thus obtained.

Inside an inclined chamber in the laboratory that has an ambient temperature of approximately 25 ° C and a humidity of 50% to 60%, the insect controller obtained in the above, is stored in a state without maximum bending for 3 weeks (it is say, 504 hours). After storage, the insect controller is used for the same tests as described in Examples 5 and 6. As a result, the rate of knockdown (%) after 60 minutes was 99% for Culex pipiens pallens and 100% for Aedes aegypti .

Example 8 First, 10 ml of a 20% (w / v) solution of 1S, 3S, 4S, 6R-carane-3, 4-diol in acetone is applied to a paper for impregnation, followed by air drying. The impregnated paper is used, together with a pair of flat members, to prepare an insect controller having a shape as shown in Figures 4a and 4b. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention. Having described the invention as above, property is claimed as contained in the following:

Claims

1. An insect controller, characterized in that it comprises a volatile insecticidal compound or an insect repellent compound without heating, which is carried on a support with at least one through hole.

2. The insect controller according to claim 1, characterized in that the support has a surface area to volume ratio in the range of 1 to 20 cm "1.

3. The insect controller according to claim 1 or 2, characterized in that the support is made of paper, fabrics or resin films.

4. The insect controller according to any of claims 1 to 3, characterized in that the support has a structure bent with a plurality of through holes.

5. The insect controller according to claim 4, further characterized by comprising a pair of flat members, between which the support is interleaved, wherein the support can be bent or unfolded by rotating the flat members in opposite directions around a fixed axis in a plane or in a lateral edge of the flat members.

6. The insect controller according to any of claims 1 to 5, characterized in that the vapor pressure of the insecticidal-volatile compound or the insect repellent compound at 20 ° C is 1.0 x 10"4 mmHg or greater.

7. The insect controller according to any of claims 1 to 6, characterized in that the volatile insecticidal compound or the insect repellent compound without heating is at least one selected from the group consisting of e pentrin, transflutril, 3- (2, 2-dichlorovinyl) -2, 2-dimethylcyclopropane carboxylate of l-ethynyl-2-fluoro-2-pentenyl, carane-3,4-diol, N, N-diethyl-m-toluamide and 2- (2-hydroxyethyl) 1-Methyl-n-propyl-1-pyridinecarboxylate.

8. A method for controlling harmful insects, characterized in that it comprises placing an insect controller according to claims 1 to 7 in such a state that the volatile insecticidal compound or the insect repellent compound without heating transported therein, can be evaporated and then placed on the insect controller in a place where the effects of insect control are required.