Anti-insect culture medium and Anti-insect method using the same

Abstract

To provide a more efficient anti-insect measure during an orchid cultivation process.SOLUTION: The present invention provides an anti-insect culture medium, comprising a shaped medium having a plurality of pores 10 interconnected to each other, and an anti-insect agent 20 evenly dispersed and fixed in the pores, wherein the shaped medium comprises at least one culture medium solid 30, the anti-insect agent comprises an anti-insect ingredient, and the anti-insect agent is a sustained-release formulation.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an insect-repellent culture medium. The present invention also relates to a method for controlling insects. [Background technology]

[0002] The book "Taiwan's Wild Orchids" states that "there are over 400 species of orchids in Taiwan, accounting for one-tenth of the country's more than 4,600 species of plants." As such, Taiwan is rich in orchid diversity. In addition, Taiwan's total flower tree exports in 2022 will reach US$224 million, of which Phalaenopsis and Oncidium flexuosum account for 77.5% of total exports. Therefore, orchids are an important commercial crop in Taiwan.

[0003] Geographically, Taiwan's hot and humid climate is suitable for the growth of orchids, and therefore for the growth and reproduction of various insects. In other words, the introduction of insects into the orchid cultivation process can result in significant economic losses due to (1) a deterioration in the quality and value of the orchid products, (2) the escalation of quarantine measures adopted by the importing country, and (3) the direct return of containers containing all of the orchid products in the container shipment. Therefore, eliminating insects is an important issue in orchid cultivation.

[0004] Current control methods consist of (1) the use of 16-mesh or 32-mesh insect nets, (2) the use of anti-climbing devices for mollusks on plant supports, (3) regular replacement of sticky insect traps, and (4) regular spraying of insect repellents, which require a great deal of manpower. Therefore, there remains room for the development of more efficient insect control measures. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Taiwan Patent Application Publication No. 200640368 Summary of the Invention [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides an insect-repellent culture medium, comprising a formed culture medium having a plurality of interconnected pores, and an insect repellent uniformly dispersed and fixed within the pores, wherein the formed culture medium comprises at least one medium solid, the insect repellent comprises an insect repellent component, and the insect repellent is a sustained-release formulation.

[0007] The shaped medium of the present invention is useful for supporting and promoting the growth of plant seedlings, such as orchid seedlings, and has pores for receiving and immobilizing a uniformly dispersed insect repellent. Furthermore, the sustained release of the insect repellent component provides insect protection to the roots planted in the insect repellent medium during seedling development, thereby avoiding the traditional problem of insufficient protection inside the medium resulting from only applying the insect repellent to the surface of the medium. The present invention also proves that the insect repellent medium of the present invention (1) provides long-term and complete insect repellent effect to plant roots, (2) reduces the labor cost of periodically reapplying insect repellent, and (3) reduces the amount of insect repellent. Therefore, the present invention reduces the cost of plant cultivation and is friendly to both the natural environment and the health of the growers.

[0008] In the present invention, the pores of the forming medium also refer to the voids or pore spaces.

[0009] In the present invention, "repellent" refers to, but is not limited to, "killing insects," "inhibiting the growth of insects," "inhibiting the reproduction of insects," "repelling insects," or "keeping insects away."

[0010] In the present invention, "uniformly distributed" refers to the weight percentage of repellent in samples obtained from different parts of the repellent medium being similar or the same.

[0011] In one embodiment, the insect repellent component is present in an amount of 0.1% to 15% by weight, for example, 0.1%, 0.3%, 0.6%, 0.9%, 1.2%, 1.5%, 2%, 4%, 6%, 8%, 10%, 12%, 14% or 15% by weight, based on the total weight of the insect repellent.

[0012] In one embodiment, the repellent comprises a solid formulation, a liquid formulation, or a combination thereof.

[0013] Preferably, the solid formulation comprises a solid bait, which has, but is not limited to, the form of a powder.

[0014] Preferably, the liquid formulation includes, but is not limited to, any one or combination of an emulsion, a water-based emulsion, and a water suspension.

[0015] In one embodiment, the repellent is a plurality of repellent particles. Preferably, the molding medium is present in an amount of 85% by weight to 99.99% by weight, for example, 85% by weight, 87% by weight, 90% by weight, 93% by weight, 97% by weight, 99% by weight, 99.3% by weight, 99.7% by weight, 99.9% by weight, 99.95% by weight or 99.99% by weight, and the insect repellent particles are present in an amount of 0.01% by weight to 15% by weight, for example, 0.01% by weight, 0.05% by weight, 0.1% by weight, 0.3% by weight, 0.7% by weight, 1% by weight, 3% by weight, 7% by weight, 10% by weight, 13% by weight or 15% by weight, based on the total weight of the insect repellent medium.

[0016] In one embodiment, the insect repellent is an aqueous emulsion, and the aqueous emulsion is present in an amount of 0.01 ml to 2 ml, for example, 0.01 ml, 0.03 ml, 0.07 ml, 0.1 ml, 0.3 ml, 0.7 ml, 1 ml, 1.3 ml, 1.7 ml, or 2 ml, per 10 g total weight of the insect repellent medium.

[0017] In one embodiment, the insect repellent component is 1×10 -5 g to 2 g, e.g., 1×10 -5 g, 5×10 -5 g, 1×10 -4 g, 5×10 -4 g, 1×10 -3 g, 5×10 -3 g, 1×10 -2 g, 5×10 -2 The amounts are 0.1g, 0.5g, 1g, 1.5g, or 2g.

[0018] In one embodiment, the molded medium is molded by compression.

[0019] In the present invention, the relative positions of the medium solids are fixed and the formed medium has a fixed shape.

[0020] In one embodiment, the shaped medium has a shape corresponding to the growing container. Preferably, the shape of the forming medium is customizable. In other words, the forming medium can have a variety of shapes.

[0021] In one embodiment, the molding medium has an upper surface, the molding medium has a receiving space in the center, and the receiving space is connected to the upper surface of the molding medium through a communication passage.

[0022] The upper surface of the molding medium refers to the outer surface of the molding medium, which is disposed opposite to the direction of gravity during the cultivation process.

[0023] Preferably, the upper surface of the forming medium is C-shaped. More preferably, the horizontal cross section of the shaped medium is C-shaped. That is, the side walls of the molding medium are not continuous walls but have gaps through which a plant can be placed into the accommodation space of the molding medium. In addition, the horizontal cross section of the C-shape of the formed medium represents a cross section perpendicular to the direction of gravity during the cultivation process.

[0024] In one embodiment, the receiving space has a diameter and the passageway has a diameter. Preferably, the diameter of the accommodation space is greater than the diameter of the communication passage. More preferably, the diameter is the average diameter or the maximum diameter. In the present invention, the accommodation space provides a space reserved for root growth, and the communication passage provides a space reserved for stem growth or allows the roots of the plant seedlings to penetrate directly into the molding medium.

[0025] In one embodiment, the molding medium further comprises an adhesive and / or glue.

[0026] The formed medium includes a plurality of medium solids, and the adhesive fixes the relative positions of the medium solids to maintain the structure of the formed medium.

[0027] Preferably, the insect repellent particles are fixed to the molding medium by an adhesive. For example, the insect repellent particles are fixed to the upper surface of the storage space, the communication passage, or the molding medium by an adhesive.

[0028] More preferably, the insect repellent particles are fixed in their respective pores by an adhesive. That is, the repellent particles are fixed to the walls of the pores, i.e., to the outer surface of the medium solids surrounding the pores.

[0029] In one embodiment, the pressure sensitive adhesive and / or glue has an organic containing component. The adhesive or adhesive component is made of one or more organic substances.

[0030] In one embodiment, the insect repellent particles are trapped, stuck or disposed within the pores. In other words, the pores of the molding medium can be adjusted to fix the insect-repellent particles, thereby preventing the insect-repellent particles from being carried to the bottom of the seedling pot and accumulating there by water from regular watering during the cultivation process. In addition, the pores are compressed by the growth of the roots, thereby maintaining the fixing effect of the insect repellent particles.

[0031] In one embodiment, the liquid formulation is mixed with an adhesive to form a mixed liquid, which is dispersed and adhered to the walls of the pores and then allowed to solidify.

[0032] By "adhering to the walls of the pores" is meant adhering to the outer surface of the medium solids surrounding the pores.

[0033] The medium solids may include, but are not limited to, any one or combination of materials including coconut fiber, peat soil, sphagnum moss, bark, stone, charcoal, tree fern, foam, styrofoam chips, fern fiber, calcined clay, and rock wool.

[0034] In one embodiment, Sphagnum moss is also referred to as water moss.

[0035] In one embodiment, coconut fiber is also referred to as coconut coir.

[0036] Preferably, the medium solids comprise a material including coconut fiber and peat soil.

[0037] In one embodiment, the molding medium comprises coconut fiber, peat soil and a binder.

[0038] In one embodiment, the moisture content of the molding medium is that of an insect-resistant medium.

[0039] In one embodiment, the forming medium comprises organic matter. Preferably, the forming medium has 65% to 93% by weight of organic matter relative to the total weight of the forming medium, for example 65%, 67%, 69%, 71%, 73%, 75%, 78%, 81%, 84%, 87%, 90% or 93% by weight of organic matter. Preferably, the forming medium has an organic matter content of 88% to 92% by weight.

[0040] In one embodiment, the molding medium comprises plugs from Quick Plug BV, The Netherlands. Preferably, the forming medium comprises Xcellent Plug or peat soil which is officially registered in Taiwan with the registration number "Fertilizer Import (Reserve) No. 0776065".

[0041] In one embodiment, each gram of forming medium has a water absorption capacity of 2g to 4g. For example, each gram of molding medium can absorb water in amounts of 2 g, 2.3 g, 2.6 g, 2.9 g, 3.2 g, 3.5 g, 3.8 g or 4 g.

[0042] In one embodiment, the water absorption capacity of the molding medium per gram is the water supply capacity of the insect repellent medium per gram.

[0043] In one embodiment, the forming medium comprises dry materials. Preferably, the dry matter of the forming medium is 130 kg / m 3 ~140kg / m 3 Bulk density, for example, 130 kg / m 3 , 132kg / m 3 , 134kg / m 3 , 136kg / m 3 , 138kg / m 3 or 140 kg / m 3 It has a bulk density of

[0044] In one embodiment, the molding medium has a shrinkage rate of 23% to 33%, for example, 23%, 25%, 27%, 29%, 31% or 33%.

[0045] In one embodiment, the shrinkage rate of the molding medium is the shrinkage rate of an insect-resistant medium.

[0046] In one embodiment, the molding medium has a porosity of 15% to 25%. In other words, the air content of the molding medium is 15% to 25% by volume, for example, 15%, 17%, 19%, 21%, 23% or 25% by volume, relative to the total volume of the molding medium.

[0047] In one embodiment, the porosity of the molding medium is the porosity of an insect-resistant medium.

[0048] Preferably, when measuring any of the bulk density of the dry material of the molding medium, the shrinkage rate of the molding medium, and the porosity of the molding medium, the pressure head is -10 cm. Pressure head indicates the pressure potential energy per unit mass of water expressed as the vertical height of a static water column resulting from a pressure difference in a pressure field, the reference pressure being standard atmospheric pressure.

[0049] In one embodiment, the insect repellent component includes, but is not limited to, any one or combination of pyriproxyfen, permethrin, milbemectin, malathion, methomyl, and imidacloprid.

[0050] Preferably, the insect repellent component comprises pyriproxyfen. The pyriproxyfen employed in the present invention has the advantage of being low in toxicity to mammals, and is an environmentally friendly insecticide in agriculture.

[0051] The present invention further provides a method of insect control comprising the step of planting a plant in an insect-control medium.

[0052] Preferably, the plant is an orchid.

[0053] The present invention is particularly suitable for, but not limited to, the cultivation of orchids, as orchid root health is particularly important to orchid growth.

[0054] In summary, the present invention provides complete insect protection to the roots throughout the entire development of the plant seedling, particularly for orchid seedlings. Additionally, the present invention eliminates the labor costs of periodically reapplying repellent and reduces the amount of repellent used. Therefore, the present invention reduces the cost of plant cultivation and is friendly to both the natural environment and the health of the growers. [Brief description of the drawings]

[0055] [Figure 1] FIG. 2 is a schematic longitudinal sectional view including a partially enlarged schematic view of the insect-proof culture medium of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0056] The present invention will be further described through the following embodiments. Those skilled in the art can easily appreciate the advantages and benefits achieved by the present invention. The invention should not be limited to the content of the embodiments. Those skilled in the art may make improvements or modifications to implement or apply the teachings of the present invention without departing from the spirit and scope of the present invention.

[0057] Example 1: Insect-repellent medium

[0058] As shown in FIG. 1, the insect-repellent medium of the present invention comprises a formed medium 1 having a plurality of interconnected pores 10 and an insect repellent 20 uniformly dispersed and fixed within the pores 10, the formed medium 1 comprising at least one medium solid 30, the insect repellent 20 comprising an insect repellent component, and the insect repellent 20 being a sustained-release formulation.

[0059] The insect repellent 20 is a plurality of insect repellent particles, and the molding medium 1 is 85% to 99.99% by weight and the insect repellent particles are 0.01% to 15% by weight relative to the total weight of the insect repellent medium.

[0060] The molding medium 1 also has a storage space 40 in the center, and this storage space 40 is connected to an upper surface 60 of the molding medium 1 through a communication passage 50. The maximum diameter of the accommodation space 40 is larger than the maximum diameter of the communication passage 50 . In addition, the upper surface 60 of the molding medium 1 is C-shaped, and the gap in the C arises from the gap in the side wall of the molding medium 1, so that a plant can be placed into the storage space 40 of the molding medium 1 through this gap.

[0061] Preparation 1: Example 2 (E2) to Example 4 (E4)

[0062] Preparation 1 contained E2-E4. Each of E2 to E4 employed the same component of the formed medium, which was Xcellent Plug, a peat soil product officially registered in Taiwan with the Taiwan registration number “Fertilizer Import (Reserve) No. 0776065” and classified as “7-03-Organic Medium.” Also, E2 to E4 employ different insect repellents, which will be explained in detail below.

[0063] Example 2 (E2): The medium solids (obtained by finely chopping the above Xcellent Plug), an insect repellent (product name: Jin-LihNungLing, purchased from Lih Nung Chemical Co., Ltd., Taiwan, active ingredient: pyriproxyfen, specification: 11% (w / v) aqueous emulsion and sustained release formulation) and an organic adhesive were mixed uniformly for at least 5 minutes until a uniform mixture was observed with the naked eye. This homogeneous mixture was further compressed and molded using a mold to obtain the insect-repellent medium of E2. Finally, the single insecticidal medium of E2 had a total weight of about 10 g and contained about 0.5 ml of the above Jin-LihNungLing. Thus, the single insecticidal medium of E2 contained 0.055 g (= 0.5 × 11% (w / v)) of pyriproxyfen.

[0064] Example 3 (E3): The medium solids (obtained by finely chopping the above-mentioned Xcellent Plug), an insect repellent (product name: Sumilab Insect Growth Regulator Granules, purchased from Sumitomo Chemical Japan Co., Ltd., active ingredient and amount: pyriproxyfen 0.5% (w / w), specification: sustained-release formulation) and an organic adhesive were mixed uniformly for at least 5 minutes until a uniform mixture was observed with the naked eye. The homogeneous mixture was further compressed and molded using a mold to obtain the insect-repellent medium of E3. Finally, a single repellent medium of E3 had a total weight of about 10 g and contained about 1 g of repellent. Thus, the single insecticidal medium of E3 contained 0.005 g (=1 × 0.5 / 100) of pyriproxyfen.

[0065] Example 4 (E4): E4 was similar to E3, with the only difference being that the amount of repellent in the single repellent medium of E4 was 0.06g. Thus, the single insecticidal medium of E4 contained 0.0003 g (=0.06 × 0.5 / 100) of pyriproxyfen.

[0066] Experiment 1: Insect repellent experiment

[0067] Experiment 1 consisted of five groups, Comparative Example 1A, Comparative Example 1B, Example 5, Example 6 and Example 7, and each group contained 140 orchid seedlings. The ambient temperature was controlled at 28°C to 30°C, and the humidity was controlled at 75% to 90%. Experiment 1 lasted for 10 weeks. Orchid seedlings of all groups were arranged in the same space. Each group had two blocks, and each block contained 7 x 10 orchid seedlings. The orchid seedlings were grown at high density so that the blocks were adjacent to each other and the orchid seedlings were close enough together that their leaves were sometimes touching each other.

[0068] I. Below, we provide a detailed description of all intergroup differences in Experiment 1.

[0069] A. Comparative Example 1A (CE1A) and Comparative Example 1B (CE1B): Both CE1A and CE1B implemented the same conventional insect control method, but the only difference between them is that CE1A and CE1B adopted different batches of orchid seedlings with a time interval of about 4 days.

[0070] Conventional insect control methods will now be described in detail. The insect repellent (Jin-LihNungLing, 11% (w / v) aqueous emulsion mentioned above) was diluted 1500 times with water to obtain a diluted insect repellent. The diluted repellent was applied periodically to the orchid seedlings at average intervals of 2.5 days. Orchid seedlings were planted in commercially available potting medium (Xcellent Plug as above, no insect repellent added) in clear plastic cups with holes in the bottom. The diluted repellent was poured into the clear plastic cup until the water level was above the top surface of the commercial molding medium, which required approximately 50 ml. Any diluted repellent that was not absorbed by the commercial molding medium was gradually expelled through a hole in the bottom of the clear plastic cup.

[0071] A single commercially available molded medium weighs 10 g and can absorb approximately 30 ml of diluted insect repellent. Therefore, both CE1A and CE1B culture media absorbed approximately 0.0022 g (= 30 × 11% × 1 / 1500) of pyriproxyfen per application, and the total absorption of pyriproxyfen over 10 weeks was 0.062 g (= 0.0022 × (7 × 10 / 2.5).

[0072] B. Example 5 (E5)-Example 7 (E7): E5-E7 carried out similar insect control methods, but the only difference between them was that they adopted insect control media obtained from E2-E4 respectively, and all of E2-E4 contained insect repellents.

[0073] In E5-E7, orchid seedlings were planted in transparent plastic cups with holes at the bottom on the insect-proof medium of E2-E4, respectively. At intervals of 2 or 3 days, water was poured into the clear plastic cup until the water level was above the top surface of the insecticide medium, which required approximately 50 ml. Any water not absorbed by the insecticide medium was gradually drained through holes in the bottom of the clear plastic cup.

[0074] II. The results of the insect control experiment in Experiment 1 were evaluated as follows.

[0075] The growth of the orchid seedlings in each group was inspected at 6 and 10 weeks, and the insect-eaten rate and total defective rate were calculated. The calculation method is explained in detail below, and the results are shown in Table 1.

[0076] A. Insect bite rate

[0077] Calculation formula: insect infestation rate (%) = (number of orchid seedlings infested with insects) / 140 × 100%. If insects or insect bite lesions were found on the orchid seedlings with the naked eye at weeks 6 and 10, such orchid seedlings were marked as insect bite positive and included in the “number of orchid seedlings with insect infestation.” In addition, the number of orchid seedlings infested with insects in the 6th week was accumulated to the number of orchid seedlings infested with insects in the 10th week.

[0078] B. Total defective rate

[0079] Calculation formula: Total defect rate (%) = (number of defective items) / 140 x 100%. Insect-infested and dead orchid seedlings were marked as defective. For example, orchid seedlings that have died due to poor quality of the orchid seedlings themselves, or due to unknown causes including, for example, damage by newly hatched or first instar larvae that is too small to be seen with the naked eye or that is inconspicuous or covered and therefore difficult to identify. Additionally, the "number of defective items" in the 6th week was accumulated into the "number of defective items" in the 10th week.

[0080] [Table 1] Total pyriproxyfen amount, insect bite rate and total defective rate for all groups over 10 weeks

[0081] [Table 1]

[0082] Comparing CE1A, CE1B and E5, it can be seen that the amount of pyriproxyfen in the single insecticidal medium of E2 employed in E5 (0.055 g) was slightly lower than that employed in CE1A and CE1B (0.062 g), although CE1A, CE1B and E5 all employed Jin-LihNungLing (11% (w / v) aqueous emulsion). The moth-eaten rate and total failure rate of CE1A and CE1B at the 6th and 10th weeks were significantly higher than that of E5, indicating that the dispersion effect of pyriproxyfen inside the commercial molding medium by the diluted mothballs of CE1A and CE1B was insufficient. Therefore, the present invention in which E5 adopted E2 (formed medium premixed with insecticide) actually effectively improved the insect repellent effect.

[0083] Comparing E5 and E6, the amount of pyriproxyfen (0.005 g) in the single insecticidal medium of E3 employed in E6 was 9.09% (= 0.005 / 0.055 × 100%) of the amount of pyriproxyfen in the single insecticidal medium of E2 employed in E5. In other words, E6 contained about one-tenth the amount of pyriproxyfen used in E5. Both the insect-eaten rate and total failure rate of E5 and E6 were close at 6 and 10 weeks, indicating that the amount of pyriproxyfen required can be significantly reduced by E6, which adopts the insect-proof medium of E3 pre-mixed with Sumilab insect growth regulator granules (insect-proof particles). Therefore, the insecticide medium E3 containing insecticide particles (solid formulation insecticide) adopted in E6 reduced the risk of insecticide particle loss due to regular watering and showed a better fixation effect than the insecticide medium E2 containing liquid formulation insecticide adopted in E5.

[0084] Comparing E6 and E7, it was found that the amount of pyriproxyfen in the single insecticidal medium of E4 employed in E7 (0.0003 g) was 6% (= 0.0003 / 0.005 × 100%) of the amount of pyriproxyfen in the single insecticidal medium of E3 employed in E6. Although the insect bite rate and total failure rate of E7 at 6 and 10 weeks were both slightly higher than E6, it can be seen that the insecticidal medium containing insecticidal particles (a solid formulation insecticidal agent) further significantly reduced the amount of pyriproxyfen required.

[0085] Finally, additional comments by the inventors are as follows: The inventor has previously conducted a comparative test in which the above-mentioned Jin-LihNungLing (11% (w / v) aqueous emulsion) (abbreviated as the liquid group) and Sumilab insect growth regulator granules (insect repellent particles) (abbreviated as the solid group) were periodically applied to orchid seedlings with the same amount of pyriproxyfen. The liquid group is a simple dispersion of Jin-LihNungLing's diluted insect repellent on the top surface of the commercial molding medium, and the solid group is a simple dispersion of insect repellent particles on the top surface of the commercial molding medium, and the final amount of pyriproxyfen in the diluted insect repellent dispersed on the commercial molding medium in the liquid group is the same as the final amount of pyriproxyfen in the insect repellent particles dispersed on the surface of the commercial molding medium in the solid group. The inventors found that the insect-repellent effect of the solid group was significantly inferior to that of the liquid group, and confirmed that the dispersion effect of pyriproxyfen inside the commercially available molded medium by regular watering was insufficient in the solid group. Therefore, comparative examples such as simply dispersing insect repellent particles on the top surface of a commercially available molding medium were not carried out for this specification.

[0086] In summary, the present invention (1) provides long-term and complete insect repellent effect to plant roots, (2) reduces the amount of insect repellent required, and (3) eliminates the need for regular application of insect repellent.

Claims

1. An insect repellent medium comprising: The present invention comprises a molded medium having a plurality of pores connected to each other, and an insect repellent uniformly dispersed and fixed in the pores, The formed medium comprises at least one medium solid; The insect repellent comprises an insect repellent component, An insect repellent medium, wherein the insect repellent is a sustained release formulation.

2. 2. The insect repellent medium according to claim 1, wherein the insect repellent component is present in an amount of 0.1% to 15% by weight based on the total weight of the insect repellent.

3. The insect repellent is a plurality of insect repellent particles, The formed medium is in an amount of 85% to 99.99% by weight based on the total weight of the insect-proof medium; 2. The insect-repellent medium according to claim 1, wherein the insect-repellent particles are present in an amount of 0.01% to 15% by weight.

4. The insect repellent is an aqueous emulsion, 2. The insect-repellent medium according to claim 1, wherein the amount of the aqueous emulsion is 0.01 ml to 2 ml per 10 g of the total weight of the insect-repellent medium.

5. The insect repellent component is 1×10 per 10 g of the total weight of the insect repellent medium. -５ The insect-repellent medium according to claim 1, wherein the amount of the insect-repellent medium is from 100 g to 2 g.

6. 2. The insect repellent medium of claim 1, wherein the medium solids have materials including any one or combination of coconut fiber, peat soil, sphagnum moss, bark, stone, charcoal, tree fern, foam, styrofoam chips, fern fiber, calcined clay, and rock wool.

7. 2. The insect repellent medium according to claim 1, wherein the insect repellent component comprises any one of pyriproxyfen, permethrin, milbemectin, malathion, methomyl and imidacloprid, or a combination thereof.

8. The forming medium has an organic matter content of 65% to 93% by weight based on the total weight of the forming medium, Each gram of said forming medium has a water absorption capacity of 2 g to 4 g; The molding medium has a porosity of 15% to 25%; The forming medium has a bulk density of 130 kg / m ３ ~140kg / m ３ and a dry material having a temperature of from 100° C. to 150° C.

2. The insect-repellent medium according to claim 1, wherein the molded medium has a shrinkage rate of 23% to 33%.

9. An insect-control method comprising the step of planting a plant in the insect-control medium according to any one of claims 1 to 8.

10. The insect control method according to claim 9, wherein the plant is an orchid.

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