JP2023144629A - Insect mating promotion device and insect mating promotion method - Google Patents

Abstract

To provide an insect mating promotion device capable of improving reproductive efficiency by promoting surely mating of two-winged insects, even when using only artificial light.SOLUTION: An insect mating promotion device 10 for promoting mating of two-winged insects stored in a cage 1, includes an irradiation light source 2 for irradiating light containing visible light into the cage 1, and a reflection member 3 for reflecting, towards the inside of cage 1, light having a wavelength of green to red irradiated from the irradiation light source 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to devices and methods for promoting mating in Diptera insects.

Diptera insects, especially the black soldier fly, are insects that have the potential to avoid future protein crises, and therefore, the development of mass production techniques for them is progressing in various parts of the world. It has been known that light is necessary to promote mating among adult black soldier flies, and that sunlight is suitable as a light source. For example, Non-Patent Document 1 below shows that when sunlight is used in combination with artificial light, the number of eggs laid and the number of fertilized eggs increase compared to when only artificial light is used.

Small-scale rearing of the black soldier fly, Hermetia illucens (Diptera: Stratiomyidae), in the laboratory: low-cost and year-round rearing, November 2015 Applied Entomology and Zoology 51(1), DOI:10.1007/s13355-015- 0376-1

However, when breeding black soldier flies year-round in an artificial environment, methods that rely on sunlight to promote mating may result in large changes in the amount of eggs collected due to changes in the amount of sunlight due to seasonal and weather changes. Therefore, a mating promotion method using only artificial light is desired.

An object of the present invention is to provide a device and method that can reliably promote mating of Diptera insects and improve reproductive efficiency even when using only artificial light.

A first aspect of the present invention is an insect mating promotion device for promoting mating of Diptera insects housed in a cage, comprising:
an irradiation light source that irradiates light including visible light into the cage;
A reflecting member that reflects light with wavelengths between green and red out of the light emitted from the irradiation light source toward the inside of the cage, or a light emitting member that emits light with wavelengths between green and red toward the inside of the cage. ,
It is equipped with
It is characterized by

A second aspect of the present invention is an insect mating promotion method for promoting mating of Diptera insects housed in a cage, comprising:
an irradiation step of irradiating light containing visible light into the cage;
A reflection step of reflecting light with wavelengths of green to red out of the irradiated light toward the inside of the cage, or a light emitting step of emitting light with wavelengths of green to red toward the inside of the cage;
contains,
It is characterized by

According to the present invention, even when only artificial light is used, mating of Diptera insects can be reliably promoted and reproductive efficiency can be improved.

1 is a schematic perspective view of an insect mating promotion device according to a first embodiment of the present invention. FIG. 2 is an enlarged partial view of FIG. 1; It is a perspective schematic diagram of the insect copulation promotion device of the 1st modification of 1st Embodiment. It is a perspective schematic diagram of the insect copulation promotion device of the 2nd modification of 1st Embodiment. It is a perspective schematic diagram of the insect mating promotion device of the 3rd modification of 1st Embodiment. It is a perspective schematic diagram of the insect mating promotion device of the 4th modification of 1st Embodiment. It is a perspective schematic diagram of the insect mating promotion device of the 5th modification of 1st Embodiment. It is a perspective schematic diagram of the insect mating promotion device of the 6th modification of 1st Embodiment. It is a perspective schematic diagram of the insect mating promotion device of the 7th modification of 1st Embodiment. It is a perspective schematic diagram of the insect mating promotion device of the 8th modification of 1st Embodiment. It is a perspective schematic diagram of the insect copulation promotion device of the 9th modification of a 1st embodiment. FIG. 2 is a schematic perspective view of an insect mating promotion device according to a second embodiment of the present invention.

[First embodiment]
FIG. 1 is a schematic perspective view of an insect mating promotion device according to a first embodiment of the present invention. The insect mating promotion device 10 of this embodiment is a device that promotes mating of Diptera insects housed in a cage 1, and includes an irradiation light source 2 that irradiates light including visible light into the cage 1, and an irradiation light source 2 that irradiates light including visible light into the cage 1. The cage 1 is provided with a reflecting member 3 that reflects light of a red wavelength out of the light irradiated from the cage 1 toward the inside of the cage 1. Here, the red wavelength is 590 to 780 nm. Furthermore, the Diptera insect in this embodiment is the black soldier fly.

The cage 1 has a rectangular parallelepiped shape composed of six walls. As shown in FIG. 2, each wall is constructed by stretching a thin mesh body 12 over a rectangular frame 11. The peripheral edge of the mesh body 12 is fixed to the frame 11 with fasteners such as screws or adhesive. The frame 11 is made of resin, wood, metal, or the like. The mesh plate 12 is made of natural fiber, synthetic fiber, metal fiber, or the like. The mesh plate 12 is configured to allow air and light to pass through, but not insects.

The irradiation light source 2 is a light source that irradiates artificial light, and is a light source that irradiates light including visible light. The irradiation light source 2 may irradiate light including not only visible light but also ultraviolet light. As the irradiation light source 2, existing lighting can be used. The wavelength of the light emitted from the irradiation light source 2 is 300 to 780 nm when it includes ultraviolet light, and is 380 to 780 nm when it includes only visible light.

The reflective member 3 is a member that exhibits a red color, and specifically, is paper that exhibits a red color (that is, red paper). Note that a board (ie, a red board) may be used instead of paper.

In this embodiment, as shown in FIG. 1, the irradiation light source 2 faces the left wall 131 of the cage 1, and irradiates light from the horizontal direction into the cage 1 through the left wall 131. It is provided. Further, the red paper serving as the reflective member 3 is provided so as to cover the entire outer wall surface of the right wall 132 of the cage 1. Therefore, in this embodiment, the irradiation light source 2 and the reflection member 3 are opposed to each other. In addition, in FIG. 1, the reflective member 3 is shown as being separated from the outer wall surface of the right wall body 132, but this is only shown for easy understanding, and in reality, the reflective member 3 3 is in close contact with the outer wall surface of the right wall body 132. It is preferable that the red paper serving as the reflective member 3 is attached to the right wall 132 by fixing its peripheral portion to the frame 11.

According to the device 10 of the present embodiment, the black soldier fly housed in the cage 1 is irradiated with light including visible light from the irradiation light source 2, and the irradiated light is transmitted to the cage 1 by the reflection member 3. By being reflected inward, red wavelength light is also emitted. That is, according to the apparatus 10 having the above configuration, the black soldier fly can be irradiated with a larger amount of red wavelength light than when only the light irradiated from the irradiation light source 2 is used. As a result, mating of black soldier flies can be promoted compared to the case where the reflecting member 3 is not provided, that is, when the light irradiated from the irradiation light source 2 is not reflected.

That is, the device 10 of the present embodiment includes an irradiation step in which light including visible light is irradiated into the cage 1, and a reflection step in which red wavelength light of the irradiated light is reflected toward the inside of the cage 1. A method for promoting insect mating is implemented, which includes:

Since the device 10 of this embodiment uses only artificial light called the irradiation light source 2, it is possible to stably irradiate light into the cage 1. Therefore, according to the device 10 of this embodiment, mating of black soldier flies can be reliably promoted.

[Modified configuration of first embodiment]
The device 10 of the first embodiment may arbitrarily adopt one or more of the following modified configurations, and even by doing so, effects equivalent to or greater than those described above can be achieved.

(1) As the reflecting member 3, a member that reflects light of a green wavelength may be used instead of a member that reflects light of a red wavelength. Specifically, paper or board that exhibits a green color (ie, green paper or green board) may be used. Here, the green wavelength is 500 to 570 nm.

(2) Instead of being provided so as to cover "the entire surface" of the outer wall surface of one wall, the reflecting member 3 may be provided so as to cover only "part" of the outer wall surface. Here, "part" means 25% or more and less than 100% of the outer wall surface. Of course, 100%, ie, "the entire surface" is most preferable.

(3) The reflective member 3 may be provided on a wall other than the right wall 132. That is, the positional relationship between the irradiation light source 2 and the reflection member 3 does not have to be such that they face each other directly as shown in FIG. For example, in the device 10 of FIG. 3, the reflective member 3 is provided on the upper wall body 133. Note that the reflecting member 3 may be provided on the lower wall 134, the front wall 135, or the rear wall 136.

(4) The reflective member 3 may be provided outside the wall instead of on the outer wall surface of the wall. For example, in the device 10 of FIG. 4, the reflective member 3 is located outside the cage 1 and obliquely with respect to the illumination light source 2.

(5) The irradiation light source 2 may be provided in the cage 1 so as to irradiate light from a vertical direction or an oblique direction. For example, in the apparatus 10 of FIG. 5, the irradiation light source 2 is provided so as to irradiate light into the cage 1 from the vertical direction. In addition, although the reflective member 3 is provided on the lower wall body 134 in FIG. 5, it may be provided on another wall body.

(6) The reflective member 3 may be provided on the outer wall surface of a plurality of walls. For example, in the device 10 of FIG. 6, the reflective members 3 are provided on five walls 132, 133, 134, 135, and 136.

(7) As the reflecting member 3, a member that reflects light with a red wavelength and a member that reflects light with a green wavelength may be used in combination. For example, when the reflective member 3 is provided on only one wall, the outer wall surface of the wall may be covered with red paper and green paper separately. Alternatively, when the reflective member 3 is provided on a plurality of walls, red paper and green paper may be used for each wall.

(8) The reflective member 3 may be provided on the "inner wall surface" of the wall of the cage 1 instead of on the "outer wall surface." For example, in the device 10 shown in FIG. 7, the reflecting member 3 is provided on the inner wall surface of the right wall 132.

(9) The reflecting member 3 may be constituted by the wall of the cage 1 itself. For example, in the device 10 of FIG. 8, the right wall 132 itself constitutes the reflective member 3. Specifically, the mesh body 12 of the right wall body 132 is made of, for example, metal fiber coated with red paint.

(10) The reflective member 3 may be provided "inside" the cage 1 instead of "outer wall surface", "inner wall surface", and "exterior" of the cage 1. For example, in the device 10 of FIG. 9, a reflection member 3 consisting of four cylindrical bodies is provided in the cage 1. In addition, in FIG. 9, the reflective member 3 is shown as seen through the cage 1. The reflective member 3 is provided "inside" by being fixed on the lower wall 134, by being suspended from the upper wall 133, or by other methods. The cylindrical body has a red or green surface, for example, by applying red or green paint to the surface, or by pasting red or green paper or board on the surface. The number of reflecting members 3 is not limited to four as long as it is one or more. Further, the reflecting member 3 is not limited to a cylindrical shape, and may have any shape such as a cube or a triangular pyramid as long as the surface exhibits red or green color.

(11) The cage 1 is not limited to the rectangular parallelepiped shape, but may have other shapes. For example, in the device 10 of FIG. 10, the cage 1 has the form of a cylinder. In this device 10, the reflecting member 3 is provided so as to cover the entire outer wall surface of the right wall 132 of the cage 1. Note that the reflecting member 3 may be provided so as to cover the outer wall surface of the cylindrical wall body 101 of the cage 1, as shown in FIG. 11. Alternatively, the reflecting member 3 may be provided not on the "outer wall surface" of the cage 1 but on the "inner wall surface" or "outside" or "inside" of the cage 1. In addition, in FIG. 11, the cage 1 is shown through the reflective member 3.

(12) The irradiation light source 2 may irradiate not only artificial light but also sunlight.

[Second embodiment]
FIG. 12 is a schematic perspective view of an insect mating promotion device according to a second embodiment of the present invention. The insect mating promotion device 10 of this embodiment is a device that promotes mating of Diptera insects housed in a cage 1, and includes an irradiation light source 2 that irradiates light including visible light into the cage 1, and a red wavelength light source. and a light emitting member 4 that emits light toward the inside of the cage 1. Here, the red wavelength is 590 to 780 nm. Furthermore, the Diptera insect in this embodiment is the black soldier fly.

The cage 1 and the irradiation light source 2 are the same as in the first embodiment, and the modified configurations that can be adopted are also the same as in the first embodiment.

The light emitting member 4 is a light emitter that emits red light, specifically a red illumination, more specifically a red LED.

In this embodiment, as shown in FIG. 12, the irradiation light source 2 faces the left wall 131 of the cage 1, and irradiates light from the horizontal direction into the cage 1 through the left wall 131. It is provided. Moreover, the red LED which is the light emitting member 4 is provided outside the cage 1 so as to face the right wall 132 with the light diffusing plate 41 interposed therebetween. That is, here, the positional relationship between the irradiation light source 2 and the light emitting member 4 is that they are directly facing each other. Note that although the light diffusing plate 41 may not be provided, it is preferable that it be provided.

According to the device 10 of this embodiment, the black soldier fly housed in the cage 1 is irradiated with light including visible light from the irradiation light source 2, and red light is emitted from the light emitting member 4 into the cage 1. The wavelength of light is also irradiated. That is, according to the apparatus 10 having the above configuration, the black soldier fly can be irradiated with a larger amount of red wavelength light than when only the light irradiated from the irradiation light source 2 is used. As a result, mating of black soldier flies can be promoted compared to the case where the light emitting member 4 is not provided, that is, when only the light is emitted from the irradiation light source 2.

That is, the device 10 of this embodiment is an insect mating device that includes an irradiation step of irradiating light including visible light into the cage 1 and a light emitting step of emitting light with a red wavelength toward the inside of the cage 1. Promotion methods are being implemented.

Since the device 10 of this embodiment uses only artificial light such as the irradiation light source 2 and the light emitting member 4, it is possible to stably irradiate the inside of the cage 1 with light. Therefore, according to the device 10 of this embodiment, mating of black soldier flies can be reliably promoted.

[Modified configuration of second embodiment]
The device 10 of the second embodiment may arbitrarily adopt one or more of the following modified configurations, and even by doing so, effects equivalent to or greater than those described above can be achieved.

(1) As the light emitting member 4, a member that emits light of a green wavelength may be used instead of a member that emits light of a red wavelength. Specifically, green lighting, and more specifically green LEDs, may be used. Here, the green wavelength is 500 to 570 nm.

(2) The positional relationship between the irradiation light source 2 and the light emitting member 4 does not have to be directly opposite to each other as shown in FIG. In other words, the light-emitting member 4 may be provided facing the lower wall 134, the front wall 135, or the rear wall 136 instead of the right wall 132.

(3) A plurality of light emitting members 4 may be provided facing one wall.

(4) A plurality of light emitting members 4 may be provided "outside" a plurality of walls, that is, a plurality of light emitting members 4 may be provided. For example, the light emitting member 4 may be provided facing each of the five walls 132, 133, 134, 135, and 136.

(5) As the light-emitting member 4, a member that emits light with a red wavelength and a member that emits light with a green wavelength may be used together. For example, when the light emitting member 4 is provided on only one wall, a red LED and a green LED may be arranged to face one wall. Alternatively, when the light emitting member 4 is provided facing a plurality of walls, red LEDs and green LEDs may be used for each wall.

(6) The light emitting member 4 may be provided not only on the "outside" of the wall but also on the "outer wall surface", "inner wall surface", or "inside".

(7) The light emitting member 4 may be constituted by the wall of the cage 1 itself. For example, the right wall 132 itself may constitute the light emitting member 4. Specifically, the mesh body 12 of the right wall body 132 is made of, for example, an optical fiber that emits light of a red or green wavelength.

[Other embodiments]
In the first and second embodiments, black soldier flies are targeted, but the present invention is applicable to insects other than black soldier flies as long as they belong to the order Diptera, such as the family Muscatidae, the family Aquilinidae, the family Orientidae, and the family Ornatidae. The same applies to insects.

[Examples 1 and 2 and Comparative Examples 1 and 2]
The following test method was carried out using the apparatus 10 of FIG. 1 under the following conditions. Example 1 uses red paper as the reflective member 3, Example 2 uses green paper, Comparative Example 1 uses blue paper, and Comparative Example uses black paper. It was set as 2.

(conditions)
・Irradiation light source 2
・Artificial solar lighting (Selic Co., Ltd., XC-500BF)
Emission wavelength range 300-780nm
・Photon flux density of irradiation light ・Front part inside cage 1: 302 μmol・m ⁻²・s ⁻¹
・Rear part in cage 1: 212 μmol・m ⁻²・s ⁻¹
・Cage 1
・Length x width x height: 30 x 30 x 30 cm

(Test method)
100 adult black soldier flies (sex ratio unknown) were housed in cage 1, irradiated with light from irradiation light source 2, and the number of matings was counted 5 minutes after irradiation. This was done twice and the average number of matings was calculated.

(result)
The results are shown in Table 1.

As is clear from Table 1, according to Examples 1 and 2, the number of copulations can be increased compared to Comparative Examples 1 and 2. In Comparative Example 2, the light emitted from the irradiation light source 2 is absorbed by the black paper and is not reflected within the cage 1. Therefore, only the light irradiated from the irradiation light source 2 is absorbed by the black paper. It will be irradiated. That is, Comparative Example 2 shows a case where only light is emitted from the irradiation light source 2.

[Example 3 and Comparative Examples 3 and 4]
The following test method was carried out using the apparatus 10 of FIG. 6 under the following conditions. As the reflective member 3, Example 3 is a case in which green paper is used, Comparative Example 3 is a case in which blue paper is used, and Comparative Example 4 is a case in which black paper is used.

(conditions)
・Irradiation light source 2
・Artificial solar lighting (Selic Co., Ltd., XC-100BF)
Emission wavelength range 300-780nm
・Cage 1
・Length x width x height: 30 x 30 x 30 cm

(Test method)
Fifty male and 50 female black soldier fly adults were housed in cage 1, irradiated with light from irradiation light source 2, and the number of copulations was counted 15 minutes after irradiation. This was done three times and the average number of copulations was determined.

(result)
The results are shown in Table 2.

As is clear from Table 2, according to Example 3, the number of copulations can be increased compared to Comparative Examples 3 and 4. Note that it can be understood that Comparative Example 4 represents a case similar to Comparative Example 2.

The insect mating promotion device of the present invention has great industrial utility value because it can reliably promote mating of Diptera insects and improve reproductive efficiency even when only artificial light is used.

1 Cage 2 Irradiation light source 3 Reflection member 4 Light emitting member 10 Insect mating promotion device 131 to 136 Wall body

Claims (11)

An insect mating promotion device that promotes mating of Diptera insects housed in a cage,
an irradiation light source that irradiates light including visible light into the cage;
A reflecting member that reflects light with wavelengths of green to red out of the light emitted from the irradiation light source toward the inside of the cage, or a light emitting member that emits light with wavelengths of green to red toward the inside of the cage. ,
It is equipped with
An insect mating promotion device characterized by: The reflective member is a member exhibiting green or red color,
The insect mating promotion device according to claim 1. The reflective member is disposed inside or on the inner wall surface, outer wall surface, or outside of the cage.
The insect mating promotion device according to claim 1 or 2. The reflecting member is constituted by the wall of the cage itself.
The insect mating promotion device according to claim 1 or 2. The reflective member is paper or a board that exhibits green or red color, and is provided on the outer wall surface of the cage.
The insect mating promotion device according to claim 1. The light emitting member is a light emitting body that emits green or red light.
The insect mating promotion device according to claim 1. The light-emitting member is disposed inside or on the inner wall surface, outer wall surface, or outside of the cage,
The insect mating promotion device according to claim 1 or 5. The light emitting member is constituted by the wall of the cage itself.
The insect mating promotion device according to claim 1 or 5. The light emitting member is a light that emits green or red light, and is provided outside the cage.
The insect mating promotion device according to claim 1. The Diptera insect is the black soldier fly,
The insect mating promotion device according to claim 1. An insect mating promotion method for promoting mating of Diptera insects housed in a cage, the method comprising:
an irradiation step of irradiating light containing visible light into the cage;
A reflection step of reflecting light with wavelengths of green to red out of the irradiated light toward the inside of the cage, or a light emitting step of emitting light with wavelengths of green to red toward the inside of the cage;
contains,
A method for promoting insect mating characterized by the following.

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