Pest attracting inhibitor

Abstract

To provide an insect pest attracting and inhibiting material which, even in the case of utilizing a white LED lamp, has excellent performance for attracting and inhibiting insect pest while securing human visual recognition.SOLUTION: There are infinitesimal peaks in the range of 440-470 nm and 500-550 nm respectively. An insect pest attracting and inhibiting material has a transmission spectrum where the light transmissivity of the infinitesimal peaks is 20% or less in the range of 440-470 nm, and so in the range of 500-550 nm.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a pest attraction prevention material that reduces light in the wavelength region to which pests are sensitive and suppresses the flying of pests.

Background Art

[0002] It is known that the phototaxis in which insects are attracted by light stimulation and fly around the light source is caused by light in a specific wavelength region. As shown in FIG. 8, the wavelengths of light that cause phototaxis in many insects are in the wavelength range of 200 to 600 nm, centered around 360 to 380 nm. Therefore, conventionally, as pest control measures, various methods have been tried to block light in the wavelength region to which insects are sensitive for night lighting.

[0003] As a pest attraction prevention material specialized in blocking light in the ultraviolet region, a pest attraction prevention acrylic resin film (Patent Document 1) having a transmittance of 20% or less at wavelengths of 400 nm or less and a transmittance of 55% or more in the visible light region of 420 nm or more, and a pest attraction prevention material in which a light-shielding agent that selectively absorbs light with wavelengths of 200 to 500 nm is contained in a transparent synthetic resin (Patent Document 2) have been proposed.

[0004] In addition, a synthetic resin sheet has been proposed that substantially blocks light with wavelengths of 380 nm or less, has a light transmittance of 30% or less for light with wavelengths of 400 to 480 nm, has a light transmittance of 50% or more for light with wavelengths of 520 nm or more, and does not substantially block light with wavelengths of 580 nm or more (Patent Document 3).

[0005] In addition, a pest attraction prevention material having a light transmittance of 10% or less at wavelengths of 200 to 420 nm, 30% or less at wavelengths of 420 to 480 nm, and 20 to 50% at wavelengths of 480 nm or more has been disclosed (Patent Document 4).

[0006] In addition, a first layer made of a translucent film containing a yellow-based colorant, with a light transmittance of 5% or less in the wavelength range of 450 nm or less and a light transmittance of 80% or more in the wavelength range exceeding 550 nm, and a second layer made of a translucent film containing a blue-based colorant, with a light transmittance of 5% or less in the wavelength range of 350 nm or less and a light transmittance of 50% or more in the wavelength range exceeding 400 nm, are laminated to form a pest attraction prevention sheet (Patent Document 5). In addition, a pest attraction prevention material having a translucent film containing a yellow-based colorant and a blue-based colorant having a complementary color relationship with the yellow-based colorant is disclosed (Patent Document 6).

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Patent Document 6

Summary of the Invention

Problems to be Solved by the Invention

[0008] However, the pest attraction-preventing films described in References 1 and 2 mainly block ultraviolet rays and lack control in the visible light range, so the attraction-preventing effect is insufficient. On the other hand, the pest attraction-preventing materials of References 3 to 6 attempt to control not only the light in the ultraviolet region but also the visible light within a certain range so as to prevent the attraction of pests while considering human visibility. However, they could be further improved in terms of human visibility and the attraction-preventing effect. In addition, none of the pest attraction-preventing materials assume application to white LED light source lamps, which are increasingly used in recent years. When using a white LED light source lamp, there is a problem that the attraction-preventing effect is reduced. Here, in the present specification, "human visibility" is an index related to recognition such as the discovery, understanding, and ease of viewing of an object when viewed with the eyes, which is affected by both the brightness necessary for recognizing the shape of an object and the color rendering property (color reproducibility) representing the appearance of colors.

[0009] In view of the above points, an object of the present invention is to provide a pest attraction-preventing material that has excellent pest attraction-preventing ability while exhibiting human visibility, particularly high color rendering properties, even when using a white LED light source lamp.

Means for Solving the Problems

[0010] In view of the above object, the present inventors examined in more detail the emission spectral distribution of a white LED light source lamp and the spectral sensitivity of insects, and found that by locally reducing the light transmittance in two specific wavelength ranges in the visible light region, it is possible to more effectively exhibit the pest attraction-preventing effect while exhibiting human visibility, particularly high color rendering properties, and thus completed the present invention.

[0011] That is, the present invention provides the following pest attraction-preventing material. [1] A pest attraction-preventing material having a transmittance spectrum in which minimum peaks exist in the ranges of 440 to 470 nm and 500 to 550 nm, respectively, and the light transmittance of the minimum peak existing in the range of 440 to 470 nm is 20% or less, and the light transmittance of the minimum peak existing in the range of 500 to 550 nm is 20% or less. [2] The light transmittance of the minimum peak in the range of 440 to 470 nm is 5 to 20%, and it is 10 to 20% of the light transmittance of the minimum peak in the range of 500 to 550 nm. The pest attraction inhibitor according to [1]. [3] The minimum peak in the range of 440 to 470 nm is in the range of 445 to 455 nm. The pest attraction inhibitor according to [1] or [2]. [4] The minimum peak in the range of 500 to 550 nm is in the range of 510 to 540 nm. The pest attraction inhibitor according to any one of [1] to [3]. [5] The pest attraction inhibitor according to any one of [1] to [4], which has a light transmittance of 30% or less in the range of 430 to 570 nm. [6] The pest attraction inhibitor according to [5], which has a light transmittance of 5 to 30% in the range of 430 to 570 nm. [7] The pest attraction inhibitor according to [5], which has a light transmittance of 10 to 25% in the range of 430 to 570 nm. [8] The pest attraction inhibitor according to any one of [1] to [7], which has a light transmittance of 20% or more in the range of 600 nm or more. [9] The pest attraction inhibitor according to [8], which has a light transmittance of 30% or more in the range of 600 nm or more.

[10] The pest attraction inhibitor according to any one of [1] to [9], which has a light transmittance of at least 15% in the wavelength region greater than 550 nm.

[0012] As described above, the pest attraction inhibitor of the present invention has the light transmittance in the visible light region densely controlled so that the light transmittance of the light with the minimum wavelength becomes 20% or less in two specific narrow wavelength ranges in the visible light region. As shown in FIG. 7, the spectral emission intensity of the white LED light source lamp is almost zero in the region of 400 nm or less. On the other hand, the spectral emission intensity of the white LED light source lamp has the largest peak (intensity ratio: about 3.5) near 450 nm, then decreases and becomes an intensity ratio of 1 or less at 480 nm, but then increases and has a second peak near 570 nm (intensity ratio: about 2.3), and then smoothly decreases. In contrast, as shown in Fig. 8, the running speed of many insects is highest in the region below 400 nm, and becomes less than one-tenth of the maximum peak near 420 nm. After that, it gradually increases and becomes about one-tenth of the maximum peak near 450 nm, and reaches about one-fifth near 480 nm. After that, it gradually decreases but turns to increase near 500 nm, has a small peak near 520 nm, then decreases, and becomes zero near 560 nm. In the present invention, by precisely matching both spectra, the minimum wavelengths in two specific narrow wavelength ranges in the visible light region, specifically, the minimum wavelengths in the ranges of 440 to 470 nm, preferably 445 to 455 nm, and 500 to 550 nm, preferably 520 to 530 nm, and the light transmittance spectra having a light transmittance of 20% or less are designed for the pest attracting and preventing material. As demonstrated by the examples described later, the pest attracting and preventing material of the present invention exhibits a more effective pest attracting and preventing effect while ensuring good visibility for people through precise control of such light transmittance spectra.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Best Mode for Carrying Out the Invention

[0014] The embodiments of the present invention will be described in detail. However, the present invention should not be construed as being limited to the following embodiments.

[0015] In an embodiment of the present invention, there is provided a pest attraction-preventing material having an optical transmittance spectrum that has minimum peaks in two specific narrow wavelength ranges near 450 nm and near 520 nm in the visible light region, and the light transmittance is 20% or less for each. As described above, from the spectral sensitivity of insects and the spectral emission intensity of white LED light source lamps, by locally reducing the light transmittance in these two narrow wavelength ranges, it is possible to more effectively exhibit the pest attraction-preventing effect while ensuring good visibility for humans.

[0016] Specifically, the pest attraction-preventing material according to the embodiment of the present invention has minimum peaks in the ranges of 440 to 470 nm and 500 to 550 nm, and the light transmittance spectrum in the visible light region is controlled so that the light transmittance is 20% or less for each. Here, in the present specification, the "minimum peak" means a point where the light transmittance existing in a specific wavelength range (for example, the range of 440 to 470 nm) is the minimum, and the light transmittance increases at wavelengths before and after that. The light transmittance of the minimum peak in the range of 440 to 470 nm is preferably 5 to 20%, more preferably 10 to 20%, and still more preferably 15 to 20% in order to effectively exhibit the pest attraction suppression effect while exhibiting better color rendering properties. Similarly, the light transmittance of the minimum peak in the range of 500 to 550 nm is preferably 10 to 20%, more preferably 10 to 18%, and still more preferably 10 to 15%.

[0017] In addition, in order to achieve a higher insect attraction suppression effect, the minimum peak in the range of 440 to 470 nm is preferably in the range of 445 to 455 nm, and more preferably in the range of 447 to 453 nm. Similarly, the minimum peak in the range of 500 to 550 nm is preferably in the range of 510 to 540 nm, and more preferably in the range of 520 to 530 nm.

[0018] In addition, since the range of 430 to 570 nm is the main wavelength range to which many insects are sensitive in the visible light region, in order to further enhance the attraction prevention effect while ensuring human visibility, it is preferable to control the light transmittance in this range to 5 to 30%, and more preferably to control the light transmittance to 10 to 25%.

[0019] On the other hand, in the wavelength region larger than 550 nm, it is preferable to increase the light transmittance so that there is no minimum peak near 555 nm. There is a peak having the second emission intensity of the white LED light source lamp near 570 nm, but the wavelength near 555 nm is the wavelength at which humans feel the brightness most strongly. In the wavelength region larger than 550 nm, the spectral sensitivity (traveling degree) of many insects is very small and almost zero at 600 nm. Therefore, by increasing the light transmittance in this wavelength region, human visibility can be further enhanced without adversely affecting the insect attraction suppression effect. Specifically, in the wavelength region larger than 550 nm, it is preferable that the light transmittance is at least 15%, and more preferably 20% or more. More specifically, it is preferable that the light transmittance is 15% to 70%, and more preferably 20% to 70%.

[0020] In particular, in the range of 600 nm or more, the spectral sensitivity (traveling degree) of insects is almost zero, and the emission intensity of the white LED light source lamp gradually decreases. Therefore, in order to enhance the color rendering property without adversely affecting the insect attraction suppression effect, it is preferable that the light transmittance is 20% or more, and more preferably 30% or more. More specifically, it is preferable that the light transmittance is 20% to 70%, and more preferably 30% to 70%.

[0021] As described above, the spectral radiant intensity of the white LED light source lamp is almost zero in the range of 400 nm or less. Therefore, when applying the pest attraction inhibitor to the white LED light source lamp, light absorption characteristics in the region of 400 nm or less are not required. However, in order to be applicable to fluorescent lamps as well, light absorption characteristics in the region of 400 nm or less may be imparted. In this case, it is preferable that the light transmittance in the range of 420 nm or less is 30%, and more preferably 20%.

[0022] The above-described transmission spectrum in the pest attraction inhibitor can be obtained by appropriately combining a yellow-based or orange-based colorant, a red-based or violet-based colorant, and a blue-based or black-based colorant. More specifically, a yellow-based or orange-based colorant can absorb light mainly in the range of 440 to 470 nm, particularly around 450 nm. Also, a red-based or violet-based colorant can absorb light mainly in the range of 500 to 550 nm, particularly around 520 nm. Further, a blue-based or black-based colorant can compensate for the absorption of wavelengths with low absorbance by the yellow-based or orange-based colorant and the red-based or violet-based colorant, and can absorb light overall in the range of 430 to 570 nm. Individual colorants each have their own unique light transmission spectrum. When designing a pest attraction-preventing material with a desired transmission spectrum, it is necessary to determine the combination of colorants, the content of each colorant, and the thickness of the pest attraction-preventing material according to the light transmission spectrum of the colorants used. However, in most cases, the pest attraction-preventing material is designed to have a thickness of 0.01 mm to 3.0 mm. Yellow or orange colorants are usually contained in the pest attraction-preventing material at a concentration of 0.002 to 3.0%, preferably at a concentration of 0.005 to 1.5%. Also, in most cases, red or violet colorants are contained in the pest attraction-preventing material at a concentration of 0.001 to 1.0%, preferably at a concentration of 0.002 to 0.5%. Further, blue or black colorants are usually contained in the pest attraction-preventing material at a concentration of 0.001 to 1.0%, preferably at a concentration of 0.002 to 0.5%.

[0023] Examples of yellow or orange colorants are not particularly limited, but pigments are preferred in terms of weather resistance, and examples thereof include pigments such as azo-based, isoindolinone-based, azomethine-based, diketopyrrolopyrrole-based, or perinone-based pigments. Among them, diketopyrrolopyrrole-based orange is preferred in terms of weather resistance, transparency, and wavelength absorbability.

[0024] Examples of red or violet colorants are not particularly limited, but pigments are preferred in terms of weather resistance, and examples thereof include pigments such as quinacridone-based, dioxazine-based, perylene-based pigments. Among them, dioxazine-based violet is preferred in terms of weather resistance, transparency, and wavelength absorbability.

[0025] As the blue or black colorant, there is no particular limitation, but a pigment is preferred in terms of weather resistance. As the blue colorant, pigments such as copper phthalocyanine-based, anthraquinone-based, and cobalt-based pigments can be mentioned. Among them, copper phthalocyanine-based pigments are preferred in terms of weather resistance and transparency. As the black colorant, carbon black, iron oxide, copper-chromium black-based, etc. can be mentioned. Among them, carbon black is preferred in terms of weather resistance and transparency.

[0026] When designing a pest attraction inhibitor applicable to a fluorescent lamp, it is preferable to contain an ultraviolet absorber in order to impart light absorption characteristics in the region of 400 nm or less. Examples of the ultraviolet absorber include ultraviolet absorbers such as benzophenone-based, benzotriazole-based, cyanoacrylate-based, and triazine-based ultraviolet absorbers. Examples of the benzophenone-based ultraviolet absorber include 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 2,2-di-hydroxy-4-methoxybenzophenone, and 2,2-di-hydroxy-4,4-di-methoxybenzophenone.

[0027] Examples of the benzotriazole-based ultraviolet absorber include 2-(5-methyl-2-hydroxyphenyl)benzotriazole, 2-(3,5-di-t-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3-t-butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole, etc. Examples of the cyanoacrylate-based ultraviolet absorber include 2-ethylhexyl 2-cyano-3,3-diphenylacrylate, ethyl 2-cyano-3,3-diphenylacrylate, hexadecyl 2-cyano-3-(4-methylphenyl)acrylate, etc. Examples of the triazine-based ultraviolet absorber include 2,4,6-tris(2-hydroxy-4-hexyloxy-3-methylphenyl)-1,3,5-triazine, etc.

[0028] The pest attracting inhibitor can be produced, for example, by molding a solid composition containing the above-described coloring material and a transparent resin under pressure and / or heat into a sheet, film, plate, etc., to obtain a molded article in which the coloring material is dispersed in the resin. The obtained molded article may be further laminated on a transparent resin sheet, film, plate, etc. to be used as a pest attracting inhibitor. The resin for dispersing the coloring material and the resin constituting the sheet, etc. on which the sheet, etc. in which the coloring material is dispersed is laminated are not particularly limited as long as they are transparent. Examples thereof include vinyl chloride resin, acrylic resin, polyester resin, polyethylene resin, and polycarbonate resin. When imparting adhesiveness to the pest attracting inhibitor, a resin imparted with adhesiveness may be selected from the above-described resins.

[0029] Examples of the method for molding the pest attracting inhibitor in which the coloring material is dispersed in the resin include an extrusion method and a calender method. In the extrusion method, various compounding agents are put into a cylinder from an inlet, and while rotating a large screw called a screw to feed the material, it is melted, kneaded, and extruded from a die in a certain shape to be molded. In the calender method, various compounding agents are heated and kneaded into a flowable compound state, and then rolled while being sandwiched between the first two heated rollers, several intermediate rollers are arranged to be heated, and finally, it is thinly formed into a film along the surface of the cooled roller and wound up to be molded. The composition to be molded is usually prepared by blending 50 to 99.99% by mass of a resin, 0.005 to 1.5% by mass of a yellow or orange coloring material, 0.002 to 0.5% by mass of a red or violet coloring material, 0.002 to 0.5% by mass of a blue or black coloring material, and 0 to 1.0% by mass of an ultraviolet absorber. It is preferable to prepare it by blending 70 to 99.9% by mass of a resin, 0.005 to 0.2% by mass of a yellow or orange coloring material, 0.002 to 0.1% by mass of a red or violet coloring material, 0.002 to 0.1% by mass of a blue or black coloring material, and 0 to 0.1% by mass of an ultraviolet absorber.

[0030] The pest attracting inhibitor can also be produced by preparing a liquid composition in which the above-described coloring material and transparent resin are dissolved in a solvent, applying this composition to a substrate (when the substrate is a laminate, the substrate is made of a transparent resin), and volatilizing the solvent. A solution containing a coloring material and a resin in an organic solvent usually contains 10 to 30% by mass of the resin, 0.01 to 0.6% by mass of a yellow or orange coloring material, 0.002 to 0.2% by mass of a red or violet coloring material, 0.002 to 0.2% by mass of a blue or black coloring material, 0 to 0.5% by mass of an ultraviolet absorber, and 70 to 90% by mass of an organic solvent, and may be prepared by blending them. It is preferable to prepare by blending 15 to 25% by mass of the resin, 0.1 to 0.3% by mass of a yellow or orange coloring material, 0.003 to 0.1% by mass of a red or violet coloring material, 0.003 to 0.1% by mass of a blue or black coloring material, 0 to 0.3% by mass of an ultraviolet absorber, and 75 to 85% by mass of an organic solvent. The organic solvent is not particularly limited as long as it can dissolve the resin, and examples thereof include esters such as ethyl acetate and butyl acetate, alcohols such as isopropyl alcohol, and aromatic solvents such as toluene and xylene. When the pest attracting inhibitor is produced as a pressure-sensitive adhesive film, it can be produced by dissolving a pressure-sensitive adhesive resin together with the above-described coloring material in a solvent and applying this composition to a substrate. Examples of such a pressure-sensitive adhesive resin include acrylic pressure-sensitive adhesives, urethane pressure-sensitive adhesives, and silicone pressure-sensitive adhesives. There is no particular limitation on the method of applying to the substrate, and for example, it can be carried out using a bar coater, a gravure coater, a reverse coater, or the like. The composition or solution containing the coloring material and the resin may contain additives such as a stabilizer, a processing aid, a plasticizer, a filler, a colorant, and an antibacterial agent, if necessary.

[0031] Since the light transmittance also varies depending on the thickness of the pest attracting inhibitor, it is preferable to appropriately adjust the thickness of the pest attracting inhibitor so as to obtain a desired light transmittance spectrum. Although it varies depending on the content of the coloring material, it is usually sufficient to be 0.01 mm to 3.0 mm, and preferably 0.02 mm to 2.0 mm.

[0032] The pest attraction inhibitor of the present invention is mainly desirably applied to a white LED light source lamp. As the white LED light source lamp, there are combinations of blue LEDs and yellow phosphors, combinations of blue LEDs, green LEDs, and red LEDs, combinations of near-ultraviolet LEDs and blue, green, and red phosphors, etc. Among them, application to a white LED light source lamp using a common blue LED and a yellow phosphor is desirable. However, in the case of a pest attraction inhibitor imparted with ultraviolet absorption characteristics, it can also be applied to a light source that emits light in the ultraviolet region such as a fluorescent lamp. The pest attraction inhibitor of the present invention can be used, for example, as a partition between buildings such as factories, or can be cut into strips and used as a curtain. Also, by imparting adhesiveness, it can be pasted on transparent window glass, acrylic plates, etc. of buildings at sites such as factories and restaurants and used as an insect-proof film. Further, it is used as an insect-proof light for coating straight tube lamps and as a cover for light units. Also, it is laminated on both sides of a base fabric made of polyester and used as a shutter sheet and a partition sheet.

Example

[0033] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited thereto. Hereinafter, unless otherwise specified, "parts" means parts by mass and "%" means mass%.

[0034] [Example 1] The above components were blended to prepare a polyvinyl chloride-based coloring composition.

Table 1

[0035] The obtained coloring composition was made into a 0.3 mm thick reddish-brown sheet by the calendar method. This sheet can be used as an insect-proof sheet as a partition between buildings such as factories, or can be cut into strips and used as a curtain. For the prepared sheet, the transmittance in the range of 300 nm to 800 nm was analyzed using a spectrophotometer (V-670 manufactured by JASCO Corporation). Fig. 1 shows the obtained light transmittance spectrum. As shown in Fig. 1, it has a light transmittance of 13% to 22% in the range of 430 to 570 nm, but the light transmittance is 32% or more in the range of 600 nm or more. Also, in the range of 440 to 470 nm, there is a minimum peak at 445 nm, and the light transmittance at that point was 16%. Further, in the range of 500 to 550 nm, there is a minimum peak at 530 nm, and the light transmittance at that point was 13%.

[0036] [Example 2] The above components were blended to prepare an acrylic-based colored pressure-sensitive adhesive composition.

Table 2

[0037] [Comparative Example 1] The above components were blended to prepare an acrylic-based colored pressure-sensitive adhesive composition.

Table 3

[0038] [Comparative Example 2] The above components were blended to prepare a polyvinyl chloride-based coloring composition.

Table 4

[0039] The obtained coloring composition was made into a reddish-purple sheet with a thickness of 0.3 mm by the calendar method. Regarding the prepared sheet, the transmittance in the range of 300 nm to 800 nm was analyzed using a spectrophotometer (V-670 manufactured by JASCO Corporation). Figure 4 shows the obtained light transmittance spectrum. As shown in Figure 4, it has a light transmittance of 11 - 56% in the range of 430 - 570 nm, and a light transmittance of 40% or more in the range of 600 nm or more. No minimum peak was observed in the range of 440 - 470 nm, the light transmittance at 440 nm was 52%, and the light transmittance at 470 nm was 36%. A minimum peak was observed at 530 nm in the range of 500 - 550 nm, and its light transmittance was 11%.

[0040] [Comparative Example 3] The above components were blended to prepare an acrylic-based coloring pressure-sensitive adhesive composition.

Table 5

[0041] [Evaluation Test] For the pest attracting and preventing materials of Example 1 and 2 and Comparative Examples 1 to 3, the visible light transmittance, the average color rendering evaluation number (Ra), and the insect attracting and preventing rate were evaluated.

[0042] 1. Visible Light Transmittance The visible light transmittance was measured for the light transmittance from wavelength 380 to 780 nm using a spectrophotometer and determined according to JIS A5759.

[0043] 2. Average Color Rendering Evaluation Number (Ra) It is an evaluation index of color rendering property that shows how faithfully each test color can be reproduced when illuminated by the target light source for each test color of R1 to R8 seen by the standard light defined in JIS Z8726. For the light obtained from a 10-shaped straight tube daylight white LED lamp coated with the pest attracting and preventing materials of Example 1 and 2 and Comparative Examples 1 to 3, the average value of R1 to R8 was calculated using a spectroradiometer (PG-200N manufactured by UPRTEK) to obtain the average color rendering evaluation number (Ra).

[0044] 3. Pest Attracting and Preventing Effect Regarding the white LED lamps coated with the pest attracting preventive materials of Example 1 and 2 and Comparative Examples 1 to 3, the pest attracting preventive effect was evaluated in comparison with the white LED lamps not coated with the pest attracting preventive materials. The test was conducted using the lighting device shown in Fig. 6. Each of the above-described white LED lamps 14 was incorporated into this device, and adhesive sheets 13 were attached to both sides of the lamp. Therefore, insects attracted to the white LED lamp 14 are captured by the adhesive sheet 13. In the test, the lighting device was placed on the cardboard 17 and used. As the white LED lamp, model number: LDF10ss·N / 6 / 6, manufactured by Ohm Electric Co., Ltd. was used. In the test, the white LED lamps coated with each pest attracting preventive material and the white LED lamps not coated with the pest attracting preventive material were arranged 5 m apart, and when lit for 20 minutes at night, the attraction prevention rate was obtained from the number of insects captured on the adhesive sheet of each device according to the following formula.

Equation

[0045] The average color rendering evaluation number (Ra) of the white LED lamps coated with each pest attracting preventive material and the test results regarding the pest attracting preventive effect are shown below together with the light transmission characteristics in the visible light region of each pest attracting preventive material.

Table 6

[0046] As described above, the visible light transmittance was the same, 21 or 22%, for any of the pest attracting preventive materials of Example 1 and 2 and Comparative Examples 1 to 3. However, the white LED lamps coated with the pest attracting preventive materials of Example 1 and 2 exhibited excellent pest attracting preventive effects while showing high color rendering, whereas the white LED lamps coated with the pest attracting preventive materials of Comparative Examples 1 to 3 had low pest attracting preventive effects. Also, the white LED lamps coated with the pest attracting preventive materials of Comparative Examples 2 and 3 were inferior in terms of color rendering.

Explanation of Reference Numerals

[0047] 1 Lighting device 2 Adhesive sheet 3 Light source (white LED lamp coated with each pest attraction prevention material or white LED lamp not coated with pest attraction prevention material) 4 Cardboard

Claims

1. A pest attraction inhibitor having a transmittance spectrum with minimum peaks existing respectively in the ranges of 440 - 470 nm and 500 - 550 nm, wherein the light transmittance of the minimum peak existing in the range of 440 - 470 nm is 20% or less, and the light transmittance of the minimum peak existing in the range of 500 - 550 nm is 20% or less.

2. The pest attraction inhibitor according to Claim 1, wherein the light transmittance of the minimum peak in the range of 440 - 470 nm is 5 - 20%, and the light transmittance of the minimum peak in the range of 500 - 550 nm is 10 - 20%.

3. The pest attraction inhibitor according to Claim 1 or 2, wherein the minimum peak in the range of 440 - 470 nm is in the range of 445 - 455 nm.

4. The pest attraction inhibitor according to any one of Claims 1 - 3, wherein the minimum peak in the range of 500 - 550 nm is in the range of 510 - 540 nm.

5. The pest attraction inhibitor according to any one of Claims 1 - 4, having a light transmittance of 30% or less in the range of 430 - 570 nm.

6. The pest attraction inhibitor according to Claim 5, having a light transmittance of 5 - 30% in the range of 430 - 570 nm.

7. The pest attraction inhibitor according to Claim 5, having a light transmittance of 10 - 25% in the range of 430 - 570 nm.

8. The pest attraction inhibitor according to any one of Claims 1 - 7, having a light transmittance of 20% or more in the range of 600 nm or more.

9. The pest attraction inhibitor according to Claim 8, having a light transmittance of 30% or more in the range of 600 nm or more.

10. The pest attraction inhibitor according to any one of Claims 1 - 9, having a light transmittance of at least 15% in a wavelength region greater than 550 nm.

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