An anopheline mosquito composition, anopheline mosquito agent, and a preparation method and application thereof

Abstract

This invention provides a mosquito-attracting composition, a mosquito attractant, its preparation method, and its application, belonging to the field of mosquito control technology. The mosquito-attracting composition of this invention comprises pyruvate, lactic acid, decanal, and nonanoic acid; or comprises pyruvate, lactic acid, decanal, 2-ketoglutarate, and nonanoic acid. This invention achieves highly efficient attraction of Aedes mosquitoes by mimicking human odor through the synergistic effect of its components, thus mimicking human odor. The mosquito-attracting composition has a rapid and long-lasting attraction effect on Aedes mosquitoes, and its simple, green, and safe composition makes it suitable for preparing highly efficient and safe mosquito trapping products, showing broad application prospects in the field of mosquito control.

Description

Technical Field

[0001] This invention belongs to the field of mosquito control technology, specifically relating to a mosquito-attracting composition, a mosquito attractant, its preparation method, and its application. Background Technology

[0002] Mosquitoes are the main vectors for the transmission of many diseases such as malaria, dengue fever, and Zika virus, posing a serious threat to human health. Developing efficient, environmentally friendly, and safe mosquito attractants is of great social and economic significance for controlling mosquito breeding and disease transmission.

[0003] Currently, mosquito attractants are mainly divided into two categories: chemically synthesized agents and natural plant extracts. Chemically synthesized agents, represented by pyrethroids and organophosphates, while having good mosquito-attracting effects, generally suffer from environmental pollution, residual toxicity, and potential harm to human health. Long-term use can also lead to increased mosquito resistance, limiting their sustainable application. Natural plant extracts, such as peppermint oil and citronella oil, have gained attention due to their natural origin and environmental friendliness. However, existing natural mosquito attractants generally suffer from unstable mosquito-attracting effects, short-lasting effects, and high costs associated with large-scale extraction, making it difficult to meet practical application needs. Summary of the Invention

[0004] In view of this, the present invention provides a mosquito attractant composition that has a highly effective and sustained attraction effect on Aedes mosquitoes, and is environmentally friendly and safe.

[0005] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a mosquito-attracting composition comprising pyruvate, lactic acid, decanal and nonanoic acid; or comprising pyruvate, lactic acid, decanal, 2-ketoglutarate and nonanoic acid.

[0006] Preferably, when the mosquito attractant composition includes pyruvate, lactic acid, decanal, and nonanoic acid, the mass ratio of pyruvate, lactic acid, 2-ketoglutaric acid, and nonanoic acid is 1~10:1~10:1:1; when the mosquito attractant composition includes pyruvate, lactic acid, decanal, 2-ketoglutaric acid, and nonanoic acid, the mass ratio of pyruvate, lactic acid, decanal, 2-ketoglutaric acid, and nonanoic acid is 1~10:1~10:1:1:1.

[0007] The present invention provides a mosquito attractant comprising the mosquito attractant composition and a solvent.

[0008] Preferably, the solvent includes water and / or an aqueous beer solution.

[0009] Preferably, the concentration of pyruvate in the mosquito attractant is 0.01~2.5 μg / mL; the concentration of lactic acid in the mosquito attractant is 0.01~2.5 μg / mL; the concentration of decanal in the mosquito attractant is 0.001~2.5 μg / mL; the concentration of 2-ketoglutaric acid in the mosquito attractant is 0~2.5 μg / mL; and the concentration of nonanoic acid in the mosquito attractant is 0.001~2.5 μg / mL.

[0010] Preferably, the concentration of pyruvate in the mosquito attractant is 2 μg / mL; the concentration of lactic acid in the mosquito attractant is 2 μg / mL; the concentration of decanal in the mosquito attractant is 2 μg / mL; the concentration of 2-ketoglutaric acid in the mosquito attractant is 0~2 μg / mL; and the concentration of nonanoic acid in the mosquito attractant is 2 μg / mL.

[0011] The present invention provides a method for preparing the mosquito attractant, comprising: mixing the mosquito attractant composition and a solvent in the mosquito attractant.

[0012] The present invention provides the use of the mosquito-attracting composition or the mosquito attractant in capturing mosquitoes.

[0013] Preferably, the mosquito capture includes preparing a mosquito capture product.

[0014] Preferably, the mosquito includes Aedes mosquitoes.

[0015] Compared with the prior art, the present invention has the following advantages: This invention provides a mosquito-attracting composition comprising pyruvate, lactic acid, decanal, and nonanoic acid; or comprising pyruvate, lactic acid, decanal, 2-ketoglutarate, and nonanoic acid. Through the synergistic effect of its components, this invention achieves a rapid and long-lasting attraction to Aedes mosquitoes (such as Aedes albopictus). This mosquito-attracting composition is safe and environmentally friendly, with its main components being naturally occurring organic acids and aldehydes. Compared to traditional chemical insecticide-based mosquito attractants, it is more human- and environmentally friendly. Furthermore, the simplified formulation of this invention facilitates production, preparation, and quality control while ensuring high mosquito-attracting efficacy. Attached Figure Description

[0016] Figure 1 The following are mosquito-attracting effect diagrams in Examples 1 and 2, where (a) is the mosquito-attracting effect of the water control, (b) is the mosquito-attracting effect of experimental groups 1-11, and (c) is the mosquito-attracting effect of experimental group 2. Figure 2 The following are mosquito trapping effects in Example 3, where (a) shows the trapping effect of experimental groups 3-6, (b) shows the trapping effect of experimental groups 3-7, and (c) shows the trapping effect of experimental groups 3-8. Figure 3The following are mosquito-attracting effect diagrams in Example 3, where (a) shows the trapping effect of experimental groups 3-9, (b) shows the trapping effect of experimental groups 3-10, and (c) shows the trapping effect of experimental groups 3-11. Detailed Implementation

[0017] The present invention provides a mosquito-attracting composition comprising pyruvate, lactic acid, decanal and nonanoic acid; or comprising pyruvate, lactic acid, decanal, 2-ketoglutarate and nonanoic acid.

[0018] In this invention, pyruvic acid is an organic acid naturally found in human sweat and plants. It can mimic human odor, stimulating the olfactory receptors of mosquitoes and thus guiding them towards the trap. Lactic acid is an important component of human sweat and has been widely proven to attract various mosquitoes. Lactic acid can produce a synergistic effect when combined with other volatile components. Decanal is a volatile aldehyde compound naturally found in various plants and fruits; its odor can stimulate the olfactory system of mosquitoes, enhancing the mosquito-attracting effect. 2-Ketoglutaric acid is an important metabolic intermediate in organisms. As a novel mosquito-attracting component, it can enrich the odor spectrum and enhance the mosquito-attracting effect of the composition. Nonanoic acid is an organic acid with a special odor characteristic that can mimic volatile organic compounds released by the host, effectively attracting mosquitoes.

[0019] This invention achieves a rapid and long-lasting attraction effect on Aedes mosquitoes (such as Aedes albopictus) through the synergistic effect of its components. The mosquito-attracting composition is safe and environmentally friendly, with its main components being naturally occurring organic acids and aldehydes. Compared to traditional chemical insecticide-based mosquito attractants, it is more human- and environmentally friendly.

[0020] In this invention, when the mosquito-attracting composition comprises pyruvate, lactic acid, decanal, and nonanoic acid, the preferred mass ratio of pyruvate, lactic acid, 2-ketoglutaric acid, and nonanoic acid is 1~10:1~10:1:1, which can be 3~8:3~8:1:1, or 5:5:1:1. When the mosquito-attracting composition comprises pyruvate, lactic acid, decanal, 2-ketoglutaric acid, and nonanoic acid, the preferred mass ratio of pyruvate, lactic acid, decanal, 2-ketoglutaric acid, and nonanoic acid is 1~10:1~10:1:1:1, which can be 3~8:3~8:1:1:1, or 5:5:1:1:1. The composition with these proportions is more conducive to synergistic effects between the components, and more conducive to rapid and sustained attraction of Aedes mosquitoes.

[0021] The present invention provides a mosquito attractant comprising the mosquito attractant composition and a solvent.

[0022] In this invention, the combination of the mosquito-attracting composition and the solvent can further enhance the mosquito-attracting effect of the mosquito-attracting composition. The solvent preferably includes water and / or an aqueous beer solution. The concentration of pyruvate in the mosquito attractant is 0.01~2.5 μg / mL, and can be 0.02, 0.025, 0.06, 0.1, 0.6, 0.8, 1.0, 1.5, or 2.0 μg / mL. The concentration of lactic acid in the mosquito attractant is 0.01~2.5 μg / mL, and can be 0.02, 0.025, 0.06, 0.1, 0.6, 0.8, 1.0, 1.5, or 2.0 μg / mL. The concentration of decanal in the mosquito attractant is 0.001~2.5 μg / mL, and can be 0.0025, 0.005, 0.01, 0.02, 0.06, 0.1, 0.6, 0.8, 1.0, 1.5 or 2.0 μg / mL. The concentration of 2-ketoglutaric acid in the mosquito attractant is 0~2.5 μg / mL, and can be 0.0025, 0.005, 0.01, 0.02, 0.06, 0.1, 0.6, 0.8, 1.0, 1.5 or 2.0 μg / mL. The concentration of nonanoic acid in the mosquito attractant is 0.001~2.5 μg / mL, and can be 0.0025, 0.005, 0.01, 0.02, 0.06, 0.1, 0.6, 0.8, 1.0, 1.5 or 2.0 μg / mL. The concentration ratio of the components is conducive to synergistic effects with the solvent, further enhancing the mosquito-attracting effect.

[0023] This invention provides a method for preparing the mosquito attractant, comprising: mixing the mosquito attractant composition and a solvent. The present invention does not impose any particular limitation on the mixing method; conventional methods in the art can be used. The preparation method of this invention is simple, environmentally friendly, and suitable for mass production.

[0024] The present invention provides the use of the mosquito-attracting composition or the mosquito attractant in capturing mosquitoes.

[0025] In this invention, the mosquito capture preferably includes the preparation of a mosquito capture product. The mosquitoes preferably include Aedes mosquitoes, and the Aedes mosquitoes preferably include adult Aedes mosquitoes. The species of Aedes mosquito preferably includes Aedes albopictus (…). Aedes albopictus ).

[0026] The embodiments of the present invention demonstrate that the mosquito attractant has a rapid and long-lasting attraction effect on Aedes albopictus, and can be used to prepare highly efficient and safe mosquito trapping products, with broad application prospects in the field of mosquito control.

[0027] To further illustrate the present invention, the solutions provided by the present invention will be described in detail below with reference to the accompanying drawings and embodiments, but these should not be construed as limiting the scope of protection of the present invention.

[0028] 1. Experimental materials: Test mosquitoes: Aedes albopictus (… Aedes albopictus Healthy adult mosquitoes were selected. The mosquitoes were fed a standard diet of 5% glucose solution and fruits and vegetables to ensure consistent physiological states. All experiments used adult mosquitoes 3-5 days after emergence.

[0029] 2. Experimental Space: Experimental site 1 was a 30×30×30 cm transparent acrylic box with a perforated breathable cardboard top panel. The acrylic box was divided into control group and experimental group partition boxes using cardboard. 15 cm diameter holes were cut into the partition cardboard to facilitate selective movement of mosquitoes.

[0030] Experimental site two measures approximately 7 × 3 × 3.5 m (volume approximately 73.5 m³). 3 The laboratory was set up in a closed office with shading measures and the ambient temperature was controlled at 30±2 ℃ to ensure the activity of mosquitoes and the consistency of the experimental environment.

[0031] 3. Environmental Parameters: Ventilate the room for at least 1 hour before each experiment to remove residual odors. Swap the control group's location for subsequent experiments to avoid interference from mosquitoes' preference for a particular direction. After each experiment, remove the mosquito attractant and other devices from the chamber, and ventilate the chamber with clean airflow for at least 10 minutes to ensure complete cleanliness before reuse, minimizing interference from residual odors. Keep the chamber away from people during testing to avoid noisy environments, human-exhaled carbon dioxide, and moving heat sources. Use black and transparent glass beads of varying sizes; their smooth, large surfaces provide landing spots for mosquitoes. During the experiment, evenly spray the solvent onto the black glass beads of different sizes to ensure continuous and slow evaporation of the attractant. After the experiment, wash the glass beads with dish soap and dry them to avoid odor residue.

[0032] Example 1: Screening of inducing agent compositions In Site 1, control group containers were placed in the control group compartment and experimental group containers were placed in the experimental group compartment. The control group containers contained the same volume of water as the experimental group inducer. A variable amount of healthy adult insects were introduced into each experiment. The candidate components—pyruvate, lactic acid, decanal, 2-ketoglutaric acid, and nonanoic acid—were designated A, B, C, D, and E, respectively.

[0033] The experimental group was divided into multiple groups based on the amount of inducing ingredient added (total amount 5ml): Inducer A: This indicates that water is used as the solvent and A is added to the solvent. The specific working concentration is shown in Table 1. Inducer B: This indicates that water is used as the solvent and B is added to the solvent. The specific working concentration is shown in Table 1. Inducer C: This indicates that water is used as the solvent and C is added to the solvent. The specific working concentration is shown in Table 1. Inducer D: This indicates that water is used as the solvent and D is added to the solvent. The specific working concentration is shown in Table 1. Inducer E: This indicates that water is used as the solvent and E is added to the solvent. The specific working concentration is shown in Table 1. Inducer BC: This indicates that water is used as the solvent and B and C are added to the solvent. The specific working concentrations are shown in Table 1. Inducer BCE: This indicates that water is used as the solvent and B, C and E are added to the solvent. The specific working concentrations are shown in Table 1. Inducing agent ABC: This indicates that water is used as the solvent and A, B and C are added to the solvent. The specific working concentrations are shown in Table 1. Inducing agents ABCE: This indicates that water is used as the solvent and A, B, C and E are added to the solvent. The specific working concentrations are shown in Table 1. Inducer ABCD: indicates that water is used as the solvent and A, B, C and D are added to the solvent. The specific working concentrations are shown in Table 1. Inducer ABCDE: indicates that water is used as the solvent and A, B, C, D and E are added to the solvent. The specific working concentrations are shown in Table 1.

[0034] At 17:00, Aedes albopictus mosquitoes were released into Site 1 to simulate peak mosquito activity. During this period, the mosquito attraction effect (percentage of mosquitoes landing) was recorded within the first 20 minutes of the experiment. The percentage of mosquitoes landing was calculated as: (number of mosquitoes landing / total number of Aedes mosquitoes released) × 100%. The number of mosquitoes landing was determined by whether a mosquito landed on the culture dish or a black glass bead. The experimental results are shown in Table 1. Figure 1 (a) shows the mosquito-attracting effect of the water control, and (b) shows the mosquito-attracting effect of experimental groups 1-11.

[0035] Table 1. Statistical results of mosquito attraction effects of different combinations of attractants

[0036] Experimental results showed that the average landing rate of attractant E alone was only 5.6%±4.8%, a small increase compared to the water control, indicating that the mosquito-attracting effect of E alone was not significant. The average landing rate of the attractant BC combination was 12.8%±4.4%, which increased to 17.8%±3.8% after adding E to form the BCE combination, but the increase was also relatively limited. However, in the compound attractants containing A, the enhancing effect of E was more obvious: the average landing rate of the ABC combination was 15.0%±5.0%, which increased to 33.3%±5.2% after adding E to form the ABCE combination; the average landing rate of the ABCD combination was 17.5%±8.0%, which further increased to 43.6%±8.9% after adding E to form the ABCDE combination, the highest among all experimental groups. In addition, the average landing rate of A alone was 11.1%±4.8%, while the average landing rate of the BCE combination increased from 17.8% to 33.3% after adding A to form the ABCE combination, indicating that A is also an important component for the mosquito-attracting effect of the compound attractant. In summary, E has limited enhancement effects when used alone or added to the BC combination, but it shows a significant mosquito attraction enhancement effect in multi-element combinations containing A, suggesting that there may be a synergistic effect between A and E. Among them, the ABCDE five-element combination has the best attraction effect on Aedes mosquitoes.

[0037] Example 2: Investigation of the attraction of different solvent-based attractants to mosquitoes Pyruvic acid, lactic acid, decanal, 2-ketoglutaric acid, and nonanoic acid are represented by A, B, C, D, and E, respectively.

[0038] The mosquito attraction experiment was conducted according to the method in Example 1. The control group was the same as in Example 1 and was conducted at Experiment Site 1. The experimental group was attracted by ABCDE + beer: that is, 3.6 degrees beer (Harbin beer, ice pure yellow beer) was used as the solvent, and A, B, C, D and E were added to the solvent. The specific working concentration and amount added are shown in Table 2.

[0039] Table 2. Effects of different solvents on mosquito attraction.

[0040] Experimental results show that the ABCDE attractant still exhibits a strong mosquito-attracting effect even after replacing water with beer as the solvent. In experimental group 2, the average landing rate of the ABCDE + beer group was 38.5% ± 13.3%, with 7, 4, and 4 Aedes mosquitoes landing in the three experiments, respectively. In contrast, the average landing rate of the water control group was only 5.1% ± 4.4%, with 1, 0, and 1 Aedes mosquitoes landing in the three experiments, respectively. This indicates that the ABCDE combination still has a significant attraction effect on Aedes mosquitoes after changing the solvent. Compared with the ABCDE group using water as the solvent in Table 1, its average landing rate changed from 43.6% ± 8.9% to 38.5% ± 13.3%, with the overall mosquito-attracting effect remaining at a similar level. These results demonstrate that the mosquito-attracting effect of the ABCDE combination does not depend on water as the solvent and can still maintain good mosquito-attracting activity in the beer system, indicating that this composite attractant has certain applicability to different solvents. Figure 1 (c) shows the mosquito-attracting effect of experimental group 2.

[0041] Example 3: Investigation of the attractiveness of other concentrations of attractant components to mosquitoes on different carriers. The experiment was conducted in experimental site two, where blank yellow glue (Nadison sticky insect board 25) was used. The control group (10 cm) and the experimental group (sprayed with 2 ml of yellow glue containing the attractant) were evenly spaced and suspended 1 m above the ground in the room. Approximately 20 healthy adult insects were used in each experiment. The candidate components, pyruvate, lactic acid, decanal, 2-ketoglutarate, and nonanoic acid, were designated as A, B, C, D, and E, respectively. Each treatment group had three replicates (n=3), and the results are expressed as mean ± standard deviation (SD).

[0042] The experimental groups were divided into multiple groups based on the different components of the inducing agent: Inducing agent AB: This indicates that water is used as the solvent, and A and B are added to the solvent. The concentrations after addition are shown in Table 3.

[0043] Inducer BE: This indicates that water is used as the solvent and B and E are added to the solvent. The concentrations after addition are shown in Table 3.

[0044] Inducer BCE: This indicates that water is used as the solvent, and B and E are added to the solvent. The concentrations after addition are shown in Table 3.

[0045] Inducing agents ABCE: This indicates that water is used as the solvent, and A, B, C, and E are added to the solvent. The concentrations after addition are shown in Table 3.

[0046] Inducing agents ABCD: This indicates that water is used as the solvent, and A, B, C, and D are added to the solvent. The concentrations after addition are shown in Table 3.

[0047] Inducing agents ABCDE: These represent the addition of A, B, C, D, and E to water as the solvent. The concentrations after addition are shown in Table 3.

[0048] From 17:00 to 17:00 the following day (a total of 24 hours), Aedes albopictus mosquitoes were released into Site 2 to simulate the peak activity periods of mosquitoes in the afternoon and at night. The trapping effect on the second day was recorded, and the experimental results are shown in Table 3. Figure 2 (a) shows the trapping effect of experimental groups 3-6, (b) shows the trapping effect of experimental groups 3-7, and (c) shows the trapping effect of experimental groups 3-8. Figure 3 (a) shows the trapping effect of experimental groups 3-9, (b) shows the trapping effect of experimental groups 3-10, and (c) shows the trapping effect of experimental groups 3-11.

[0049] Table 3. Effects of different attractants on mosquito attraction on yellow glue.

[0050] Note: Three parallel samples were set up for each treatment group (n=3), and the trapping results are expressed as mean ± standard deviation (SD).

[0051] The experimental results showed that the blank yellow gel in each experimental group failed to capture any mosquitoes, indicating that the blank yellow gel itself had a weak trapping effect. In experimental group 3-1, the high-concentration AB combination failed to capture any mosquitoes; after reducing the concentrations of A and B to 0.1 μg / ml, the average number of mosquitoes captured in experimental group 3-2 increased to 1.00±1.00, indicating that a higher concentration of attractant does not necessarily lead to better results. The BE combination in experimental group 3-3 captured an average of 1.00±0 mosquitoes, and the BCE combination in experimental group 3-4 captured an average of 2.00±1.00 mosquitoes, suggesting that the addition of C to the formula may improve the trapping effect. The ABCE combination exhibited a clear concentration-dependent effect. The average number of mosquitoes captured in experimental groups 3-5 to 3-8 were 2.67±1.16, 3.00±1.00, 4.00±1.00, and 5.33±0.58, respectively. The trapping effect gradually increased as the concentration decreased. When the concentration was further reduced to the level of experimental group 3-9, the average number of mosquitoes captured plummeted to 0.67±0.58, indicating that this combination has a relatively suitable effective concentration range. The three parallel samples in experimental groups 3-8 captured 5, 6, and 5 Aedes mosquitoes, respectively, demonstrating high trapping efficiency and good repeatability. At the same concentrations of A, B, and C, the ABCD combination in experimental groups 3-10 captured an average of only 1.67 ± 1.53 mosquitoes. However, after adding E to form the ABCDE combination, the average capture number in experimental groups 3-11 increased to 5.67 ± 2.31 mosquitoes, with three parallel samples capturing 7, 3, and 7 mosquitoes respectively, the highest average capture number among all experimental groups. This indicates that E is an important component in improving the mosquito-attracting effect of this compound formulation. On the other hand, the ABCE combination in experimental groups 3-8 captured an average of 5.33 ± 0.58 mosquitoes. After adding D to form the ABCDE combination, the capture rate only slightly increased to 5.67 ± 2.31 mosquitoes, and the fluctuation between parallel samples increased, indicating that the synergistic effect of D at this concentration was relatively limited. In summary, both the ABCE and ABCDE combinations containing E have good trapping effects at appropriate concentrations.

[0052] It should be noted that Site 2 used the cumulative number of mosquitoes captured on the sticky traps during the experiment as the evaluation index. When mosquitoes move freely in a large space, they can pass through the odor-affected area around the sticky traps multiple times; once a mosquito comes into contact with the yellow adhesive, it is fixed and cannot fly away again. Therefore, even if a suitable low concentration of attractant has limited attraction on a single approach, the capture probability can gradually accumulate through repeated approaches. In contrast, Site 1 recorded the mosquitoes' selection and landing behavior between the experimental and control areas. Mosquitoes may leave after entering the experimental area, requiring a clear, immediate odor difference to demonstrate a distinct selective preference at the observation point.

[0053] In Site 1, black spherical glass beads were used as landing targets, presenting a significant visual and surface structural difference compared to Site 2, which used vertical yellow adhesive boards. The black glass beads have low reflectivity, resulting in strong contrast with the surrounding environment. Their three-dimensional spherical outline can be observed by mosquitoes from different directions, allowing them to approach and land from multiple angles. The olfactory stimulation from the attractant activates the mosquitoes' search behavior, while the black glass beads further provide clear visual localization and landing targets. Therefore, in Site 1, the higher concentration of attractant and the black spherical targets provide strong olfactory stimulation and visual landing points, respectively, with both signals jointly encouraging mosquitoes to enter the experimental area and land on the glass bead surface. Site 2, using vertical yellow adhesive boards with light-blocking treatment, offers relatively limited visual localization due to the board's color and outline. The blank yellow adhesive failed to capture any mosquitoes in any of the experiments, indicating that the yellow adhesive board itself does not possess significant independent trapping ability. Therefore, mosquito capture depends more on whether the attractant's odor can simultaneously induce the mosquito to approach the board and make final contact. A vertical plane can only capture mosquitoes whose flight paths actually intersect with the board surface. Even if a strong, close-range odor stimulus can induce a long-distance approach, it may reduce the probability of mosquitoes finally contacting the board surface. However, at a suitable low concentration, the odor signal can be recognized by mosquitoes without hindering them from continuing to approach and contact the board. In addition, the yellow glue has an irreversible fixing effect on mosquitoes that have already been contacted, resulting in a higher cumulative capture count.

[0054] Although the above embodiments have provided a detailed description of the present invention, they are only some embodiments of the present invention, and not all embodiments. Other embodiments can be obtained based on these embodiments without creative effort, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A mosquito-attracting composition, characterized in that, It includes pyruvate, lactic acid, decanal, and nonanoic acid; or it includes pyruvate, lactic acid, decanal, 2-ketoglutarate, and nonanoic acid.

2. The mosquito-attracting composition according to claim 1, characterized in that, When the mosquito-attracting composition comprises pyruvate, lactic acid, decanal, and nonanoic acid, the mass ratio of pyruvate, lactic acid, 2-ketoglutaric acid, and nonanoic acid is 1~10:1~10:1:1; when the mosquito-attracting composition comprises pyruvate, lactic acid, decanal, 2-ketoglutaric acid, and nonanoic acid, the mass ratio of pyruvate, lactic acid, decanal, 2-ketoglutaric acid, and nonanoic acid is 1~10:1~10:1:1:

1.

3. A mosquito attractant, characterized in that, Includes the mosquito-attracting composition and solvent as described in claim 1 or 2.

4. The mosquito attractant according to claim 3, characterized in that, The solvent includes water and / or an aqueous beer solution.

5. The mosquito attractant according to claim 4, characterized in that, The concentration of pyruvate in the mosquito attractant is 0.01~2.5 μg / mL; the concentration of lactic acid in the mosquito attractant is 0.01~2.5 μg / mL; the concentration of decanal in the mosquito attractant is 0.001~2.5 μg / mL; the concentration of 2-ketoglutaric acid in the mosquito attractant is 0~2.5 μg / mL; and the concentration of nonanoic acid in the mosquito attractant is 0.001~2.5 μg / mL.

6. The mosquito attractant according to claim 3, characterized in that, The concentration of pyruvate in the mosquito attractant is 2 μg / mL; the concentration of lactic acid in the mosquito attractant is 2 μg / mL; the concentration of decanal in the mosquito attractant is 2 μg / mL; the concentration of 2-ketoglutaric acid in the mosquito attractant is 0~2 μg / mL; and the concentration of nonanoic acid in the mosquito attractant is 2 μg / mL.

7. A method for preparing the mosquito attractant according to any one of claims 3 to 6, characterized in that, include: The mosquito attractant composition and solvent in the mosquito attractant are mixed.

8. The use of the mosquito-attracting composition of claim 1 or the mosquito attractant of any one of claims 2 to 6 in capturing mosquitoes.

9. The application according to claim 8, characterized in that, The mosquito capture includes the preparation of mosquito capture products.

10. The application according to claim 8 or 9, characterized in that, The mosquitoes mentioned include Aedes mosquitoes.

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