Composition for controlling wood pests and use thereof

Abstract

The present invention relates to a composition for controlling wood pests and use thereof. Specifically, the composition of the present invention comprises dimethyl disulfide (DMDS) and carbon dioxide (CO2) as active ingredients to control pests present in or occurring on wood. The composition of the present invention replaces bromomethane, thereby minimizing environmental pollution, ensuring uniform diffusion of the composition, and having excellent control efficiency.

Description

Technical Field

[0001] This disclosure relates to compositions for controlling wood pests and their uses, and particularly to pests present on or occurring on wood (e.g., longhorn beetles). Beetles ), Nasal Termites ( Rhinotermitidae ) and Bark beetles ( Beetles A composition with excellent prevention and control effects. Background Technology

[0002] Pest control methods include chemical, physical, and biological approaches. Chemical control refers to the application of chemical agents to kill pests. Fumigants, as volatile agents, are used as chemical agents to kill pests. Generally, fumigants are widely used in agricultural or quarantine applications due to their insecticidal and fungicidal effects. In particular, fumigants are used for the control of wood pests because of their ability to easily penetrate wood.

[0003] Methyl bromide is commonly used as a quarantine fumigant for imported and exported plants. It is also widely used as a wood disinfectant because it can kill pests quickly and leaves virtually no residue.

[0004] However, methyl bromide is known to be a highly toxic substance that depletes the stratospheric ozone layer and has been designated as an ozone-depleting substance under the Montreal Protocol, leading to international restrictions on its use. Furthermore, compared to other fumigants, methyl bromide has a lower ability to penetrate deep into wood, making it difficult to control pests present or occurring on wood. Therefore, there is a need to develop an alternative fumigant.

[0005] [Existing Technical Documents] [Patent Literature] Korean Patent Publication No. 2022-0050223. Summary of the Invention

[0006] Technical issues The purpose of this disclosure is to provide a composition that can replace methyl bromide, minimize environmental pollution, and exhibit excellent control effects against wood pests.

[0007] Solution to the problem This disclosure provides a composition comprising dimethyl disulfide (DMDS) and carbon dioxide (CO2) as active ingredients for controlling pests present or occurring on wood.

[0008] In addition, this disclosure provides a method for pest control, which includes applying the composition to wood.

[0009] Furthermore, this disclosure provides the use of the composition for controlling pests present or occurring on wood.

[0010] Advantages of the invention The composition disclosed herein can replace methyl bromide, thereby minimizing environmental pollution, ensuring uniform diffusion of the composition, and exhibiting excellent control efficiency.

[0011] Furthermore, this disclosure enables pest control operators to safely use the composition in pest control operations targeting wood (e.g., wood quarantine treatment). Attached Figure Description

[0012] Figure 1 This demonstrates the method based on treating *Pterocarya longifolia* with different doses of DMDS (…). Monochamus alternata The lethality rate of pupae obtained after 24 hours is calculated from the LCT (Limited Time Tolerance) of the gas concentration inside the dryer. 99 .

[0013] Figure 2 The LC is shown based on the lethality obtained by treating pine beetle pupae with different doses of DMDS for 24 hours, calculated from the gas concentration inside the dryer. 99 .

[0014] Figure 3 The lethality of longhorn beetles under treatment with DMDS mixtures (DMDS+CO2 and DMDS+N2) in a medium-sized fumigation chamber with timber loading is shown. Detailed Implementation

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Generally, the terms used herein are well-known and commonly used in the art.

[0016] In one aspect, this disclosure relates to a composition comprising dimethyl disulfide (DMDS) and carbon dioxide (CO2) as active ingredients for controlling pests present or occurring on wood.

[0017] The compositions disclosed herein can be fumigants containing dimethyl disulfide (DMDS) and carbon dioxide (CO2) as active ingredients.

[0018] In this disclosure, the term "fumigant" refers to an insecticidal composition that disperses an active ingredient into the atmosphere by various methods to control pests, etc. The term "fumigation" refers to the use of such dispersed insecticidal compositions to control pests, and the term "control" refers to an action that exhibits one or more effects selected from prevention, inhibition, repellency, and killing of pests.

[0019] In this disclosure, the terms "insectic effect" or "control effect" refer to the insecticidal activity and efficacy against pests, used to kill or control pests to protect wood from damage. The efficacy of such fumigants can be expressed as a concentration-time product. For example, LC... 99 This refers to the dose required to achieve a 99% lethal concentration after the target population has been exposed to the fumigant. Generally, the higher the temperature at which the fumigant is used, the lower the dose required to achieve the desired effect.

[0020] In this disclosure, dimethyl disulfide (DMDS), as the active ingredient contained in the composition of this disclosure, is an organic compound with the molecular formula CH3SSCH3 and is a volatile chemical reagent used for pest control. According to the Material Safety Data Sheet (Version 1.3), DMDS has a boiling point of 110°C, an upper explosive limit of 16.1% (volume), and a lower explosive limit of 1.1% (volume).

[0021] In this disclosure, the minimum dose of DMDS refers to the minimum amount of DMDS contained in the compositions of this disclosure required to exhibit insecticidal activity against pests after treatment at a specific temperature. Specifically, at low temperatures, such as during winter, for example at 5°C or lower, 4°C or lower, 3°C or lower, 2°C or lower, or 1°C or lower, the minimum dose of DMDS may be about 180 g / m³. 3 .

[0022] Furthermore, in this disclosure, at temperatures reflecting seasons other than winter, such as 10°C or higher, 11°C or higher, 12°C or higher, 13°C or higher, 14°C or higher, or 15°C or higher, the minimum dose of DMDS can be approximately 90 g / m³. 3 .

[0023] In this disclosure, carbon dioxide (CO2) is another active ingredient contained in the composition. Carbon dioxide (CO2) acts as a carrier gas to uniformly diffuse DMDS and increases the penetration capacity of DMDS by opening the spiracles of pests, thereby enhancing the control effect. Therefore, compared to using DMDS alone, the dosage of DMDS can be reduced and the control time shortened, thereby improving the efficiency and economic feasibility of pest control operations.

[0024] In addition, carbon dioxide can improve the safety of pest control operations by reducing the flammability of DMDS itself.

[0025] In this disclosure, the concentration of carbon dioxide can be set considering the explosion limits of DMDS, the minimum dosage of DMDS at temperature, the purity of DMDS, commercial feasibility, and ease of pest control operations. Specifically, the concentration of carbon dioxide can be in the range of about 0.4% (w / w) to 83.9% (w / w), and there are no particular limitations as long as it achieves a control effect within the above range. More specifically, the concentration of carbon dioxide can be in the range of about 10% (w / w) to 83.9% (w / w), 20% (w / w) to 83.9% (w / w), 30% (w / w) to 83.9% (w / w), 40% (w / w) to 83.9% (w / w), or 50% (w / w) to 83.9% (w / w), and for example, can be about 0.4% (w / w), 1% (w / w), 10% (w / w), 20% (w / w), 30% (w / w), 40% (w / w), 50% (w / w), 60% (w / w), 70% (w / w), 80% (w / w), or 83.9% (w / w).

[0026] The compositions disclosed herein may further comprise a carrier gas other than carbon dioxide. For example, nitrogen (N2), helium (He), etc., may be used together with carbon dioxide as a carrier gas, and any carrier gas known in the art may be selected and used without departing from the scope of this disclosure.

[0027] The active ingredients of the disclosed compositions, namely DMDS and carbon dioxide, may be contained in the fumigant in the form of a liquid phase, a gas phase, or a mixture thereof.

[0028] The compositions disclosed herein may further comprise a variety of commonly used additives, such as electrodeposition aids, thickeners, anti-settling agents, dispersion stabilizers, flow improvers, and defoamers. Such additives may be selected from those known in the art without departing from the scope of this disclosure.

[0029] If both active ingredients, DMDS and carbon dioxide, are applied to wood and involve methods for controlling pests under fumigation conditions, then these two active ingredients do not necessarily need to be used as a single physical mixture, and can also be applied to wood simultaneously or sequentially, individually.

[0030] On the other hand, this disclosure provides a method for controlling pests, comprising applying two active ingredients, namely dimethyl disulfide (DMDS) and carbon dioxide (CO2), simultaneously or sequentially, to wood.

[0031] In another respect, this disclosure relates to a method for controlling pests, which includes applying the composition to wood.

[0032] In this disclosure, the target of control is pests, and the term "pest" refers to animal pests that damage wood. These pests exist or occur inside or outside the wood and cause damage. The pests include insects, mites, and nematodes, and are preferably insects. Specifically, the pests may be one or more pests selected from the families Longhorn Beetles, Nasal Termites, and Bark Boreridae, but are not limited thereto.

[0033] More specifically, the pest may be one or more selected from the pine sawyer beetle (Pinus sylvestris longissimus). Monochamus alternata ), Spruce flower longhorn beetle ( Monochamus saltuarius ), two-striped longhorn beetle ( Semanotus bifasciatus ), Kuriyama longhorn beetle ( Mallambyx raddei ) and longhorn beetle ( Semanotus spp. Pests in ).

[0034] Furthermore, the pests may be one or more selected from the Sakhalin subterranean termite (Reticulitermes spp.) Reticulitermes Kushu's sperate ), close the door to release termites ( Reticulitermes kanmonensis ) and Nakajima tree termites ( Glyptotermes nakajimai Pests in ).

[0035] In addition, the pest may be one or more selected from the brown powdery beetle ( Brown lyctena ), Korean long-tailed beetle ( Platypus koryoensis Yellow-twig bark beetle ( Yellow-bellied toad ), tail wood beetle ( Xyleborus mutilated (Betridae family), Wood beetle (Betridae) Drunken woodpecker ) and smooth-footed bark beetle ( Xylosandrus brother Pests in ).

[0036] Furthermore, the method disclosed herein can control at least one life stage of the pest, the life stage being selected from egg, larva, pupa, and adult, and the term "control" refers to one or more of prevention, suppression, repellency, and extermination.

[0037] In this disclosure, the object to be fumigated by the composition is wood, and the term "loading rate" refers to the volume ratio of the wood to be fumigated in the fumigation chamber. Specifically, the loading rate of wood can be about 30% (v / v) or more, for example, about 30% (v / v) or more, and about 70% (v / v) or less.

[0038] In one aspect, this disclosure relates to the use of the composition for controlling pests present or occurring on wood.

[0039] On the other hand, this disclosure relates to the use of compositions comprising dimethyl disulfide (DMDS) and carbon dioxide (CO2) as active ingredients for controlling pests present or occurring on wood.

[0040] Descriptions that overlap with the compositions disclosed herein are omitted here.

[0041] The method of the present invention The invention is explained in detail below by way of examples. The following examples are intended to further illustrate the disclosure, but are not intended to limit its scope.

[0042] Example Example 1. Activity evaluation of DMDS against major wood pests (1) Method To evaluate susceptibility to major wood pests that damage timber (i.e., longhorn beetles, nasal termites, and bark beetles), eggs, larvae, pupae, and adults of the longhorn beetle family were purchased from Osang Kinsect Co., Ltd. for testing. Nasal termites and bark beetles were collected from forest areas located in Gangdongmyeon, Gyeongju, Gyeongsangbuk-do, and mixed stages (eggs, larvae, adults, etc.) were used for testing.

[0043] The target pest was introduced into a 6.0 L dryer and then sealed. The pesticide was introduced through the inlet at the top of the sealed dryer at concentrations of 0.35, 0.7, 1.8, 3.5, 7.0, and 15.0 g / m³. 3 The dosage of DMDS was injected. The wood loading in the dryer was 0.0%, and the treatment time was 24 hours. During the treatment, the temperature was maintained at 15±1℃.

[0044] Twenty-four hours after treatment, the desiccator was turned on, and the pests were transferred to insect rearing petri dishes, where the temperature was maintained at 25±1℃, the photoperiod at 16 (L):8 (D) hours, and the relative humidity at 60% to 80%. For larvae and adults, viability was assessed by counting the number of surviving individuals on the first day after turning on the desiccator; for eggs and pupae, viability was assessed on the 14th day after treatment, when the hatching and emergence rates of the untreated group reached 90%.

[0045] (2) Results The results of the DMDS activity evaluation against major wood pests are shown in Table 1. In the case of termites, at 1.8 g / m³... 3 In the treatment group treated with doses of 7.0 g / m³ or higher, a mortality rate of 100.0% was observed; in the case of the pine bark beetle, at 7.0 g / m³... 3 A 100.0% lethality was observed in treatment groups treated with doses of 15.0 g / m³ or higher. Meanwhile, in the case of the pine sawyer beetle, adults, larvae, and pupae showed lethality at 15.0 g / m³. 3 The result showed a 100.0% lethality rate, with the egg concentration at 7.0 g / m³. 3 The following shows a mortality rate of 100.0%.

[0046] The order of susceptibility to DMDS was termites, pine bark beetles, and pine sawyer beetles, indicating that termites exhibited the highest susceptibility, while pine sawyer beetles exhibited the lowest susceptibility. Furthermore, within pine sawyer beetles, the order of susceptibility according to developmental stage was egg, adult, larva, and pupa, indicating that eggs exhibited the highest susceptibility, while pupae exhibited the lowest susceptibility (see Table 1).

[0047] [Table 1] Example 2. Evaluation of lethal concentration of DMDS for Cerambycidae. (1) DMDS concentration analysis To evaluate the dose-response of DMDS to longhorn beetles, pupae (the least sensitive stage, in other words, the stage most difficult to control) were purchased from Osang Kinsect Ltd. and used. At least 25 *Pterocarya stenoptera* pupae were placed in a 6.0 L desiccator, and each dose was evaluated twice. The doses were administered through the injection port at the top of the desiccator at concentrations of 5.0, 10.0, 15.0, 20.0, and 30.0 g / m³. 3 The injection dose of DMDS was administered. The wood loading rate in the dryer was 0.0%. The treatment time was 24 hours, and the temperature was maintained at 15±1℃ during the treatment.

[0048] To analyze DMDS within the dryer during treatment, samples were collected from the top inlet. 100 mL air samples were collected at 0.5, 1, 2, 3, 6, 12, and 24 hours at each treatment dose using a microsyringe, and concentrations were analyzed using an Agilent Technologies GC-7890A gas chromatograph (GC) system. The GC conditions are shown in Table 2.

[0049] [Table 2] Specifically, using an SGE Syringe 1MR-V-GT syringe, samples transferred in 500 mL aliquots to 1L Tedlar bags were injected into the gas chromatograph in triplicate or more 100 μL volumes through the injection port. An EPC-100 psi capillary S / SL port was used as the injection port, with the following conditions set: heater temperature 250°C, pressure 8 psi, total flow rate 132.09 mL / min, and septum purge flow rate 3 mL / min. An Agilent Technologies DB-1 column (15.0 m × 530 μm × 1.0 μm; model 125-101J) was used as the column. A flame ionization detector (FID) was used for DMDS analysis. The gas chromatograph temperatures were set as follows: column oven 80°C, injection port 250°C, detector 250°C, and nitrogen as the carrier gas. The flow rates for each gas were set at 35 mL / min (H2), 350 mL / min (air), and 25 mL / min (N2). Based on the resulting chromatograms, it was confirmed whether the peak heights corresponded appropriately to the concentrations, and whether the peak heights were consistent across repeated measurements at each concentration. Then, the calculated average values ​​were substituted into the regression equation of the calibration curve for the pre-analyzed standard gases to calculate the concentration of DMDS.

[0050] (2) Calculation method of concentration-time product (Ct) In the case of fumigants, the extent to which DMDS is adsorbed and penetrates into the fumigated object depends on the temperature and humidity within the fumigation chamber during chemical treatment, and the efficacy is directly proportional to the gas concentration and treatment time. Therefore, to determine the DMDS concentration within the fumigation chamber, the gas concentration is converted to a concentration-time product. Ct is calculated according to the following equation.

[0051] [Equation] Where: C is the fumigant concentration (g / m³) 3 ) t represents the exposure duration (h). i For measurement order Ct is the concentration × time (gh / m³) 3 ) The measurement time (hr) based on fumigation time (after fumigation) is determined by seven measurements within a 24-hour treatment period, in accordance with the "Regulations on Import and Export Plant Quarantine and Disinfection Treatment (2023)" issued by the animal and plant quarantine authorities.

[0052] (3) Confirm the lethal concentration of DMDS for Cerambycidae. Twenty-four hours after treatment, the desiccator was turned off, and the pests were transferred to insect rearing dishes, where the temperature was maintained at 24±1℃, the photoperiod at 16 (L):8 (D) hours, and the relative humidity at 60% to 80%. On day 14, when 90% or more of the pupae in the untreated control group had emerged, the survival rate was investigated. The probit model of the SAS program (https: / / www.sas.com / ko_kr / home.html, accessed December 2021) was used to analyze the control effect of fumigation concentration on pine sawyer beetle pupae to calculate the lethal concentration.

[0053] Based on the lethality rates obtained from treating pine beetle pupae with different doses of DMDS, the LCT was calculated based on the gas concentration inside the dryer. 99 and LC 99 The value was confirmed to be 262.51 g·h / m³. 3 and 22.43 g / m 3 (See) Figure 1 and Figure 2 ).

[0054] Example 3. In a medium-sized fumigation chamber with applied loading rate, the lethality of treatment with DMDS mixtures (DMDS+CO2 and DMDS+N2) against longhorn beetles was confirmed. (1) Method LCT of Cerambycidae according to DMDS in Example 2 99 The data were obtained in a small fumigation chamber without a timber loading rate. When a timber loading rate is applied, most of the DMDS in the air is adsorbed by the wood, resulting in a gradual decrease in the DMDS concentration within the chamber. Therefore, compared to the LCT obtained under the condition without a timber loading rate, the data is significantly higher. 99 Higher dosages are required when applying timber loading rates. In this regard, at 0.5 m 3 The synergistic insecticidal effect of treatments based on DMDS mixtures (i.e., DMDS+CO2 and DMDS+N2) was evaluated in a fumigation chamber.

[0055] At this point, the timber loading rate in the fumigation chamber was set to 40% (v / v) or higher, and a timber pile with dimensions of 0.75 m wide, 1.5 m long, and 0.6 m high was prepared. To reflect the characteristic behavior of the pine sawyer beetle burrowing into the timber and causing damage, holes with a diameter of 2 cm and a depth of 5 cm were made in the timber, and pine sawyer beetle pupae were inserted into them. The holes were sealed with plastic caps with 5 mm diameter holes, and the 5 mm holes were further sealed with sawdust to reproduce outdoor conditions.

[0056] Add 90 g / m³ to the fumigation chamber containing the timber. 399.55% DMDS was extracted and then sealed to allow it to evaporate. Then, 450 g / m³ was injected on a weight basis using an electronic balance. 3 CO2 was injected, and N2 was injected in the same manner and for the same duration as CO2 (corresponding to DMDS+CO2 mixture treatment and DMDS+N2 mixture treatment, respectively). The treatment time was 24 hours, and the temperature was maintained at 3°C ​​during the treatment.

[0057] (2) Results Survival rates were assessed on day 10 (when 90% or more of the pupae in the untreated control group had emerged) 24 hours after treatment. The lethality of treatment with a mixture of DMDS+CO2 and DMDS+N2 on longhorn beetles was shown in [data missing]. Figure 3 .

[0058] In the treatment of DMDS+CO2 and DMDS+N2 mixtures, it was confirmed that both CO2 and N2 can be used as carrier gases in combination with DMDS. In particular, it was confirmed that CO2 significantly enhances the activity of DMDS (see [link to relevant documentation]). Figure 3 ).

[0059] Example 4. Confirmation of the concentration-time product and lethality of DMDS treatment alone and DMDS+CO2 mixture for longhorn beetles. To confirm the effectiveness of DMDS+CO2 mixture treatment based on DMDS dosage and temperature, the wood loading rate in the fumigation chamber was set at 33.9% (v / v). Holes 2 cm in diameter and 5 cm deep were formed in the wood, and spruce longhorn beetle pupae were inserted into them. The holes were sealed with plastic caps with 5 mm diameter holes, and sawdust was used to further seal the 5 mm holes to reproduce outdoor conditions.

[0060] 180 g / m³ was added to the fumigation chamber containing the wood. 3 Or 224.3 g / m 3 99.55% DMDS alone (DMDS treated separately). Alternatively, add 180 g / m³ to the fumigation chamber containing the wood. 3 Or 224.3 g / m 3 The solution was 99.55% DMDS, then sealed to allow it to evaporate, followed by the injection of 50% (w / w) CO2 (DMDS+CO2 mixture treatment) in the same manner as described in Example 3. The treatment time was 24 hours, and the temperature was maintained at 3°C ​​during the treatment.

[0061] During the treatment period, samples were collected from the upper and lower parts of the fumigation chamber at 0.25, 1, 2, 4, 6, 12, and 24 hours to confirm the concentration-time product for each dose. Additionally, survival was assessed on day 10 (when 90% or more of the pupae in the untreated control group had emerged) to evaluate lethality. The results are shown in Tables 3 and 4, respectively.

[0062] When at 180 g / m 3 and 224.3 g / m 3 When DMDS was used alone at the specified treatment doses, lethalities of 80% and 90% were observed, indicating that 100% lethality was not achieved. In contrast, 100% lethality was observed in all cases when treated with a DMDS+CO2 mixture.

[0063] [Table 3] [Table 4] Example 5. Confirmation of the prevention and control effect based on DMDS treatment dosage and temperature (1) Under the conditions described in Example 4, the efficacy of DMDS+CO2 mixture treatment was evaluated by varying the DMDS treatment dosage and temperature. 89.72 g / m³ was added to the fumigation chamber. 3 135.58 g / m 3 Or 179.44 g / m 3 The solution was 99.55% DMDS, then sealed to allow it to evaporate. Then, 50% (w / w) CO2 (DMDS+CO2 mixture treatment) was injected in the same manner as described in Example 3. The treatment time was 24 hours, and the temperature was maintained at 10°C during the treatment.

[0064] During the treatment period, samples were collected from the upper and lower parts of the fumigation chamber at 0.25, 1, 2, 4, 6, 12, and 24 hours to confirm the concentration-time product for each treatment dose. Additionally, survival was assessed on day 10 (when 90% or more of the pupae in the untreated control group had emerged) to evaluate lethality. The results are shown in Table 5.

[0065] Specifically, the left side of Table 5 shows the concentration-time product and lethality of the treatment dose under the temperature conditions (3°C) of Example 4, while the right side of Table 5 shows the concentration-time product and lethality of the treatment dose under the temperature conditions (10°C) of Example 5.

[0066] [Table 5] The minimum treatment dose of DMDS in the DMDS+CO2 mixture treatment, which exhibited 100% lethal activity at 3°C, was determined to be 179.43 g / m³. 3 Furthermore, the minimum treatment dose of DMDS in the DMDS+CO2 mixture treatment, which exhibited 100% lethal activity at 10°C, was determined to be 89.72 g / m³. 3 .

[0067] Example 6. Confirmation of prevention and control effect based on DMDS treatment dosage and temperature (2) Under the conditions described in Example 4, the control effect of DMDS+CO2 mixture treatment on pine sawyer beetle was evaluated by varying the DMDS treatment dosage and temperature conditions. 22.43 g / m³ of DMDS was added to the fumigation chamber. 3 44.86 g / m 3 67.29 g / m 3 Or 89.72 g / m 3 The DMDS (99.55%) was then sealed to allow it to evaporate. Then, 50% (w / w) CO2 (DMDS+CO2 mixture treatment) was injected in the same manner as described in Example 3. The treatment time was 24 hours, and the temperature was maintained at 15°C during the treatment.

[0068] During the treatment period, samples were collected from the upper and lower parts of the fumigation chamber at 0.25, 1, 2, 4, 6, 12, and 24 hours to confirm the concentration-time product for each treatment dose. Furthermore, survival was assessed on day 10 (when 90% or more of the pupae in the untreated control group had emerged) to evaluate lethality. The results are shown in Tables 6 and 7, respectively.

[0069] [Table 6] [Table 7] The minimum treatment dose of DMDS in the DMDS+CO2 mixture treatment, which exhibited 100% lethal activity at 15°C, was confirmed to be 89.72 g / m³. 3 .

Claims

1. A composition comprising dimethyl disulfide (DMDS) and carbon dioxide (CO2) as active ingredients for controlling pests present or occurring on wood.

2. The composition according to claim 1, wherein the concentration of carbon dioxide is 0.4% (w / w) or more and 83.9% (w / w) or less.

3. The composition according to claim 1, wherein the concentration of the carbon dioxide is in the range of 10% (w / w) to 83.9% (w / w), 20% (w / w) to 83.9% (w / w), 30% (w / w) to 83.9% (w / w), 40% (w / w) to 83.9% (w / w), or 50% (w / w) to 83.9% (w / w).

4. The composition according to claim 1, wherein the minimum dose of the DMDS at a temperature of 5°C or lower is 180 g / m³. 3 .

5. The composition according to claim 1, wherein the minimum dose of the DMDS at a temperature of 10°C or higher is 90 g / m³. 3 .

6. A method for controlling pests, comprising applying the composition according to any one of claims 1 to 5 to wood.

7. The method according to claim 6, wherein the prevention and control is selected from one or more of prevention, inhibition, repellency and extermination.

8. The method of claim 6, wherein the loading rate of the wood to which the composition is applied is 30% (v / v) or more.

9. The method according to claim 6, wherein the pest is selected from the family Cerambycidae ( Cerambycidae ), Nasal Termites ( Rhinotermitidae ) and Bark beetles ( Scolytidae One or more of the following.

10. The method of claim 6, wherein the pest is controlled at least one life stage, the life stage being selected from egg, larva, pupa, and adult.

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