Mosquito trapping composition and application thereof

Abstract

The invention belongs to the technical field of health pest prediction, prevention and control, and provides a mosquito trapping composition and application thereof. The mosquito trapping composition is prepared from 8.5 to 10 parts of hexanoic acid, 8 to 10.5 parts of ammonium bicarbonate, 20 to 28 parts of L-lactic acid, 5 to 10 parts of octenol, 3 to 6 parts of capraldehyde, 0 to 6 parts of undecanal, 8 to 10 parts of methyl heptenone and 2 to 4 parts of acetophenone. According to the bionic mosquito attractant, a plurality of inducing factors are organically integrated to achieve a bionic effect, mosquitoes can be more effectively attracted through the synergistic effect of the components, and the problems that an existing mosquito attractant is poor in environmental compatibility, poor in attraction pertinence to some mosquitoes, limited in attraction capacity, complex in preparation process and the like are solved.

Description

Technical Field

[0001] This invention belongs to the field of sanitary pest prediction and control technology, and relates to a biomimetic mosquito-attracting composition. Background Technology

[0002] The information disclosed in this background section is intended to enhance understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.

[0003] Mosquitoes are one of the major threats to human health, transmitting a variety of diseases such as malaria, dengue fever, yellow fever, West Nile fever, and Zika fever. Globally, over 700,000 people die each year from mosquito-borne infectious diseases. Besides causing itchy, swollen, and painful skin and triggering allergic reactions, mosquito bites also result in economic losses, including medical expenses, lost productivity, and lost tourism revenue.

[0004] Mosquito surveillance involves collecting and analyzing information on mosquito density, distribution, species, and activity patterns regularly or irregularly using various methods and means. Mosquito surveillance data can guide mosquito control efforts, improve control effectiveness, provide a scientific basis for disease prevention and control, and also serve research in mosquito biology, ecology, and other related fields.

[0005] When mosquitoes bite, they first sense the carbon dioxide exhaled by the human, then detect the body odor and temperature produced by metabolism, ultimately locating the target human and biting to suck blood. Carbon dioxide mosquito traps are commonly used mosquito monitoring devices that can simulate the carbon dioxide exhaled by humans, attracting mosquitoes more effectively. Therefore, the trapping effect is usually good; however, simple carbon dioxide traps have the drawback of low trapping efficiency for mosquito species such as Aedes mosquitoes in practical applications. The reason is that the process of humans attracting mosquitoes first involves using the carbon dioxide produced by respiration to lure mosquitoes from a distance. When they get close to the target, they need to use the odor emitted by the human body to locate them more precisely for blood-sucking. The whole process relies on the synergistic effect of carbon dioxide and body odor at different distances. Therefore, from a bionics perspective, it is necessary to add a bionic human odor necessary for close-range positioning as bait to the carbon dioxide trap. This coordinated approach between long-distance attraction and close-range trapping is an effective way to improve the trapping effect of adult mosquitoes. Summary of the Invention

[0006] To address the problems of limited species and poor trapping effect of current mosquito attractants, this invention provides a mosquito attractant composition that is universally applicable to Culex, Aedes and Anopheles mosquitoes and has high trapping efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution.

[0008] A mosquito attractant composition comprising the following ingredients in parts by weight: Hexanoic acid 8.5-10, ammonium bicarbonate 8-10.5, L-lactic acid 20-28, octenol 5-10, decanal 3-6, undecaldehyde 0-6, methylheptenone 8-10, acetophenone 2-4.

[0009] Preferably, the mosquito-attracting composition comprises the following components in parts by weight: Hexanoic acid 8.5-10, ammonium bicarbonate 8-10.5, L-lactic acid 20-28, octenol 5-10, decanal 3-6, undecaldehyde 0-2, methylheptenone 8-10, acetophenone 2-4.

[0010] Preferably, the mosquito-attracting composition further includes a solvent and / or a carrier.

[0011] The solvent is selected from at least one of n-hexane and liquid paraffin.

[0012] The carrier is at least one of nano-silica, macroporous resin, and rubber.

[0013] In some embodiments, the mosquito-attracting composition comprises the following components in weight percentages: hexanoic acid 8.5%, ammonium bicarbonate 10.35%, L-lactic acid 25.1%, octenol 5.9%, decanal 3.09%, undecaldehyde 2%, methylheptenone 8%, acetophenone 2%, carrier 10%, and solvent to a final volume of 100; or, Hexanoic acid 10, ammonium bicarbonate 8, L-lactic acid 20, octenol 10, decanal 6, undecaldehyde 6, methylheptenone 10, acetophenone 4, carrier 10, solvent to 100; or, Hexanoic acid 10, ammonium bicarbonate 8, L-lactic acid 20, octenol 10, decanal 6, methyl heptenone 10, acetophenone 4, carrier 10, solvent to 100.

[0014] In the above-mentioned mosquito-attracting composition, the carrier is preferably nano-silica, and the solvent is preferably n-hexane.

[0015] A method for attracting adult mosquitoes includes the following steps: using the above-mentioned mosquito-attracting composition in combination with a CO2 mosquito-attracting lamp.

[0016] The CO2 flow rate is 100-1000 mL / min; preferably 300-600 mL / min.

[0017] The present invention has the following advantages: The mosquito attractant of this invention, through comprehensive analysis of human odor components, integrates human odors from different genders, regions, and ages, and based on the combined effects of different components on the antennal potential and blood-sucking behavior of mosquitoes, selects currently known substances with definite attractant properties. Based on the proportion of different odor substances in the overall human odor, and by rationally controlling the proportion of each component in the formula, multiple inducing factors are organically integrated to achieve a biomimetic effect, which can more effectively attract mosquitoes. This solves the problems of poor environmental compatibility, weak targeting of certain mosquitoes, limited attraction ability, and complex preparation process of current mosquito attractants.

[0018] The mosquito attractant composition of this invention simulates the types and contents of human body surface metabolic products. Based on the physiological habits and olfactory responses of mosquitoes, it fully utilizes the synergistic relationship between the components while attracting mosquitoes from a distance with carbon dioxide. It also attracts mosquitoes by simulating the "body odor" of humans at close range. Due to the good simulation of human odor, the attraction effect on mosquitoes is greatly enhanced. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments, but the present invention is not limited to the following embodiments.

[0020] Example 1: Preparation of Mosquito-attracting Composition Weigh the ingredients according to the following formula: 8.5 parts hexanoic acid, 10.35 parts ammonium bicarbonate, 25.1 parts L-lactic acid, 5.9 parts octenol, 3.09 parts decanal, 2 parts undecaldehyde, 8 parts methyl heptenone, 2 parts acetophenone, 10 parts nano silica, and n-hexanol to make up to 100 parts.

[0021] The raw materials, excluding the carrier and ammonium bicarbonate, are mixed and then added to a solvent. After being fully dissolved, the mixture is stirred with the nano-silica carrier for adsorption. Then, it is fully mixed with ammonium bicarbonate to obtain mosquito attractant A.

[0022] Example 2 Preparation of mosquito-attracting composition Weigh the ingredients according to the following formula: Hexanoic acid 10, ammonium bicarbonate 8, L-lactic acid 20, octenol 10, decanal 6, undecaldehyde 6, methylheptenone 10, acetophenone 4, nano silica 10 parts, n-hexanol to make up to 100 parts.

[0023] Mosquito attractant B was prepared according to the method in Example 1.

[0024] Comparative Example 1: Preparation of Mosquito-attracting Composition Weigh the ingredients according to the following formula: Hexanoic acid 12, ammonium bicarbonate 6, L-lactic acid 15, octenol 15, decanal 9, undecaldehyde 8, methylheptenone 12, acetophenone 6, nano silica 10 parts, n-hexanol to make up to 100 parts.

[0025] Mosquito attractant C was prepared according to the method in Example 1.

[0026] Application Example 1: The attraction effect of the mosquito-attracting composition on different mosquito species. In early August, with temperatures ranging from 29℃ to 34℃ and relative humidity from 70% to 83%, the mosquito-attracting effects of different mosquito attractants in residential areas were compared. Three carbon dioxide mosquito-attracting lamps were placed in the green areas of the control community, more than 150 meters apart, serving as the control group. Simultaneously, three other similar residential areas, more than 600 meters apart, served as test sites for mosquito attractants A, B, and C. Three identical carbon dioxide mosquito-attracting lamps were set up in each residential area with the same environmental type. Monitoring was conducted weekly for four consecutive weeks, after which the species and number of mosquitoes captured were recorded. All carbon dioxide mosquito-attracting lamps had a CO2 flow rate of 500 mL / min, and each mosquito attractant was used at a dosage of 5 g, with 5 g of n-hexanol used as a control. The trapping time was from one hour before sunset to one hour after sunset.

[0027] Table 1. Mosquito attraction effects of different mosquito attractants combined with carbon dioxide mosquito lamps As shown in Table 1, mosquito attractants A, B, and C exhibit different trapping effects on various mosquito species in outdoor environments. Compared to the control group using only CO2, attractants B and C showed no significant difference in attracting Culex pipiens pallens, while attractant A was significantly superior to the control group and experimental groups B and C. For Aedes albopictus, attractants A and B were more effective, significantly better than the control group and attractant C. Furthermore, attractant A could attract a wider range of mosquito species. Therefore, this invention selected attractant A as the optimal formulation.

[0028] Comparative Example 2: Preparation of Mosquito-attracting Composition Weigh the ingredients according to the following formula: 8.5 parts hexanoic acid, 10.35 parts ammonium bicarbonate, 25.1 parts L-lactic acid, 5.9 parts octenol, 3.09 parts decanal, 8 parts methyl heptenone, 2 parts acetophenone, 10 parts nano silica, and n-hexanol to make up to 100 parts.

[0029] The raw materials, excluding the carrier and ammonium bicarbonate, are mixed and then added to a solvent. After being fully dissolved, the mixture is stirred with the nano-silica carrier for adsorption. Then, it is fully mixed with ammonium bicarbonate to obtain mosquito attractant D.

[0030] Application Example 2: The Attracting Effect of Different Mosquito-Attracting Combinations on Mosquitoes In late August, with temperatures ranging from 28℃ to 35℃ and relative humidity between 70% and 80%, the mosquito-attracting effects of different mosquito attractants in residential areas were compared. Three standard-compliant carbon dioxide mosquito attractants were placed in green areas of two similar residential areas, more than 150 meters apart, serving as the control group (using only CO2) and experimental group A (CO2 + attractant D). Simultaneously, another similar residential area was used as the experimental group B (CO2 + attractant A), more than 600 meters away, with three carbon dioxide mosquito attractants also set up. Monitoring was conducted weekly for four consecutive weeks, after which the species and number of mosquitoes captured were recorded. All carbon dioxide mosquito attractants used a CO2 flow rate of 500 mL / min, and each attractant was used at a dosage of 5 g, with 5 g of n-hexanol used as a control. The trapping time was from one hour before sunset to one hour after sunset.

[0031] Table 2. Mosquito attraction effects of different mosquito attractants combined with carbon dioxide mosquito lamps As shown in Table 2, mosquito attractants A and D were more effective than the control in attracting various types of mosquitoes in outdoor environments. The mosquito attractants had a good attraction effect on various types of mosquitoes in outdoor environments. Although mosquito attractant D, which does not contain undecyl, had a better attraction effect than the control group in outdoor environments, it was still less effective than mosquito attractant A.

Claims

1. A mosquito-attracting composition, characterized in that, It contains the following ingredients by weight: Hexanoic acid 8.5-10, ammonium bicarbonate 8-10.5, L-lactic acid 20-28, octenol 5-10, decanal 3-6, undecaldehyde 0-6, methylheptenone 8-10, acetophenone 2-4.

2. The mosquito-attracting composition according to claim 1, characterized in that, The mosquito attractant composition contains the following ingredients in parts by weight: Hexanoic acid 8.5-10, ammonium bicarbonate 8-10.5, L-lactic acid 20-28, octenol 5-10, decanal 3-6, undecaldehyde 0-2, methylheptenone 8-10, acetophenone 2-4.

3. The mosquito-attracting composition according to claim 1 or 2, characterized in that, The mosquito-attracting composition also includes a solvent and / or a carrier.

4. The mosquito-attracting composition according to claim 3, characterized in that, The solvent is selected from at least one of n-hexane and liquid paraffin; The carrier is at least one of nano-silica, macroporous resin, and rubber.

5. The mosquito-attracting composition according to claim 3, characterized in that, The mosquito-attracting composition comprises the following components in weight percentages: hexanoic acid 8.5%, ammonium bicarbonate 10.35%, L-lactic acid 25.1%, octenol 5.9%, decanal 3.09%, undecaldehyde 2%, methylheptenone 8%, acetophenone 2%, carrier 10%, and solvent to a final volume of 100; or, Hexanoic acid 10, ammonium bicarbonate 8, L-lactic acid 20, octenol 10, decanal 6, undecaldehyde 6, methylheptenone 10, acetophenone 4, carrier 10, solvent to 100; or, Hexanoic acid 10, ammonium bicarbonate 8, L-lactic acid 20, octenol 10, decanal 6, methyl heptenone 10, acetophenone 4, carrier 10, solvent to 100.

6. The mosquito-attracting composition according to claim 5, characterized in that, The carrier in the mosquito-attracting composition is nano-silica, and the solvent is n-hexane.

7. A method for attracting adult mosquitoes, characterized in that, Includes the following steps: The mosquito-attracting composition as described in any one of claims 1-6 may be used in combination with a CO2 mosquito-attracting lamp.

8. The method according to claim 7, characterized in that, The CO2 flow rate is 100-1000 mL / min.

9. The method according to claim 7, characterized in that, The CO2 flow rate is 300-600 mL / min.

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