Sweet potato weevil sex attractant composition, preparation method thereof and sweet potato weevil lure

Abstract

The invention relates to the technical field of agricultural pest control, in particular to an ipomoea batatas sex attractant composition, a preparation method of the ipomoea batatas sex attractant composition and an ipomoea batatas lure. The sex attractant composition is prepared from the following preparation raw materials in parts by mass: 4 to 6 parts of (Z)-3-dodecene-1-yl (E)-2-butenoic acid ester, 3 to 4 parts of a synergist, 4 to 6 parts of an odor compound, 0.3 to 0.4 part of an antioxidant, 1.5 to 2 parts of ethyl butyrate and 40 to 45 parts of a volatile solution, wherein the synergist is prepared by mixing cis-3-hexene acetate and cis-13-octadecenal, and the synergist is prepared by mixing the cis-3-hexene acetate and the cis-13-octadecenal. The ipomoea batatas sex attractant composition has remarkable technical advantages in the aspects of improving trapping efficiency, stability, lasting period, environmental protection property, cost effectiveness, avoiding drug resistance and the like, and an efficient, economical and environment-friendly solution is provided for prevention and treatment of ipomoea batatas.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural pest control, and in particular to a sweet potato weevil sex attractant composition and a preparation method thereof, and a sweet potato weevil attractant core. Background Art

[0002] The sweet potato weevil, also known as the sweet potato ant weevil and the sweet potato weevil, is an important pest during the growth and storage period of sweet potatoes. When the potato tubers are damaged, they become honeycomb-shaped, turn black or dark brown, and induce diseases and rot, resulting in a 15%-20% reduction in sweet potato production, and in severe cases, up to 30%-50%, or even a total loss of production.

[0003] Sweet potato weevils have strong vitality, fast reproduction, high reproduction coefficient, long adult survival period, serious overlapping of generations, and hidden damage. At present, the prevention and control of sweet potato weevils is still mostly based on chemical control, which is prone to the "3R" problem of pests, and even malicious incidents such as sweet potato poisoning, which has brought great troubles to the quality and safety of my country's agricultural products. Sweet potato quality and safety are an indispensable core for the sustainable and healthy development of the grain industry; the green prevention and control of sweet potato weevils is related to the sanitation, quality and safety of agricultural products. Therefore, it is urgent to find a truly feasible green prevention and control method.

[0004] Insect pheromones are sex hormones produced by female insects to attract male insects. In agricultural production, placing synthetic sex attractants in the field to attract male insects can not only observe the occurrence of pests, but also carry out trapping and killing. It is widely used in production due to its advantages such as high efficiency and low cost, no resistance to pesticides in pests, safety to the environment, and protection of non-target organisms.

[0005] The existing attractants for small weevils on the market are unstable in trapping effect, with poor trapping effect and poor durability, and need to be further improved. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present application provides a sweet potato weevil sex attractant composition and a preparation method thereof and a sweet potato weevil attractant core. The sweet potato weevil sex attractant composition prepared by the present application can efficiently trap sweet potato weevils and effectively prevent and control sweet potato weevils. At the same time, the sweet potato weevil sex attractant composition has the characteristics of stable performance, long lasting effect, high efficiency, and environmental protection. In addition, the preparation method of the present application has the advantages of simplicity, low cost, green and high efficiency, and no drug resistance. The sweet potato weevil sex attractant composition prepared by the present application is used for the comprehensive control of sweet potato weevils.

[0007] In the first aspect, the present application provides a sweet potato weevil sex attractant composition, which adopts the following technical scheme: A sweet potato weevil sex attractant composition comprises the following raw materials, measured by weight: 4-6 parts of (Z)-3-dodecen-1-yl (E)-2-butenoate, 3-4 parts of a synergist, 4-6 parts of an odor compound, 0.3-0.4 parts of an antioxidant, 1.5-2 parts of ethyl butyrate, and 40-45 parts of a volatile solution; wherein the synergist is prepared by mixing cis-3-hexenyl acetate and cis-13-octadecenal.

[0008] By adopting the above technical scheme, the sweet potato weevil sex attractant composition achieves efficient trapping effect and long-term persistence through the synergistic effect of multiple ingredients. (z)-3-Dodecen-1-yl (e)-2-butenoate: This is the main sex pheromone component of the sweet potato weevil, responsible for attracting male weevils for mating. It plays a core role in the attractant. Synergist: It is a mixture of cis-3-hexenyl acetate and cis-13-octadecenal, which can significantly enhance the trapping effect of (z)-3-dodecen-1-yl (e)-2-butenoate, making it more durable and effective. Odor compound: It has a strong attraction to the sweet potato weevil and can synergize with the sex pheromone to further enhance the overall effect of the attractant. Antioxidant: It protects other active ingredients from oxidative degradation, thereby extending the service life of the attractant. Ethyl butyrate: It has a significant synergistic effect on sex pheromones, which helps to improve the efficiency of the attractant. Volatile solution: As a slow-release carrier, it controls the release rate of sex pheromones and other ingredients to ensure the long-term efficacy of the drug. In summary, these components work together to make the attractant not only highly effective but also long-lasting, and suitable for the comprehensive control of sweet potato weevils.

[0009] Preferably, the mass ratio of cis-3-hexenyl acetate to cis-13-octadecenal is 5:1-5.

[0010] Preferably, the mass ratio of cis-3-hexenyl acetate to cis-13-octadecenal is 2:1.

[0011] By adopting the above technical scheme, the role of the synergist in this application is to significantly improve the trapping effect and high efficiency and durability of the sweet potato weevil sex attractant composition. Cis-3-hexene acetate and cis-13-octadecene aldehyde are composed of a mass ratio of 2: 1. There is a synergistic effect between the two compounds, which can enhance the attraction to the sweet potato weevil, thereby improving the overall performance of the sex attractant composition. Specifically, cis-3-hexene acetate is a compound with a special smell, which has a strong attraction to the sweet potato weevil. And cis-13-octadecene aldehyde is a long-chain fatty acid aldehyde, which also has a strong attraction to the sweet potato weevil. When cis-3-hexene acetate and cis-13-octadecene aldehyde are mixed in a specific ratio of 2: 1 by mass, the interaction between them can produce a stronger attraction, making the sweet potato weevil more easily attracted by the attractant composition. In addition, the synergist can also improve the trapping effect and high efficiency and durability of (Z)-3-dodecene-1-yl (E)-2-butenoate. This is because the compounds in the synergist have a similar chemical structure to (Z)-3-dodecen-1-yl (E)-2-butenoate, and can simulate the pheromone of the sweet potato weevil to a certain extent, thereby enhancing its attractiveness to the sweet potato weevil. At the same time, the compounds in the synergist can also slow down the volatilization rate of (Z)-3-dodecen-1-yl (E)-2-butenoate, prolong its lasting effect, and maintain a high trapping effect for a long time. In short, when cis-3-hexenyl acetate and cis-13-octadecenal are mixed in a specific ratio of 2:1 by mass, the synergistic effect between them is utilized to significantly improve the trapping effect and high efficiency and durability of the sweet potato weevil sex attractant composition, thereby achieving effective prevention and control of the sweet potato weevil pest.

[0012] Preferably, the odor compound consists of nerol and phenylethyl alcohol in a mass ratio of 1:1.

[0013] By adopting the above technical scheme, the odor compound is composed of nerol and phenylethanol in a mass ratio of 1:1, and its role in the present application is to enhance the ability of the sweet potato weevil sex attractant composition to attract the sweet potato weevil. Both nerol and phenylethanol are compounds with special odors, and they have a strong attraction to the sweet potato weevil. When these two compounds are mixed, the interaction between them can produce a stronger attraction, making the sweet potato weevil more easily attracted by the attractant composition. Nerol is a compound with a strong floral fragrance, which has a certain attraction to insects. Phenylethanol is a compound with a sweet taste, which also has a strong attraction to insects. When nerol and phenylethanol are mixed in a mass ratio of 1:1, the synergistic effect between them can produce a stronger attraction, thereby improving the trapping effect of the sweet potato weevil sex attractant composition. In summary, the role of the odor compound in this application is to significantly improve the trapping effect and high efficiency and durability of the sweet potato weevil attractant composition through synergistic effects with other ingredients such as (Z)-3-dodecen-1-yl (E)-2-butenoate and synergists, thereby achieving effective prevention and control of sweet potato weevil pests.

[0014] Preferably, the volatile solution is a lipophilic low molecular weight organic solution, and the lipophilic low molecular weight organic solution is at least one of acetone, petroleum ether and n-hexane.

[0015] Preferably, the lipophilic low molecular weight organic solution is composed of n-hexane and petroleum ether in a mass fraction ratio of 1:1.

[0016] By adopting the above technical scheme, the lipophilic low molecular weight organic solution is composed of n-hexane and petroleum ether in a mass fraction ratio of 1:1. The role in this application is to serve as a volatile carrier for dissolving and carrying the effective ingredients in the sweet potato weevil sex attractant composition, while controlling the release rate of these ingredients to prolong the time of drug efficacy and improve the trapping effect. N-hexane is a colorless, transparent liquid with good solubility and volatility, and can effectively dissolve sex pheromone ingredients such as (Z)-3-dodecene-1-yl (E)-2-butenoate. Petroleum ether is a light petroleum product with good solubility and volatility. It can synergize with n-hexane to further enhance the solubility and volatility of the solution. When n-hexane and petroleum ether are mixed in a mass fraction ratio of 1:1, the synergistic effect between them can produce the following effects: 1. Enhanced solubility: The solution after the two are mixed can more effectively dissolve the effective ingredients in the sex attractant composition, ensuring that these ingredients are evenly distributed in the solution. 2. Control the release rate: The volatility of n-hexane and petroleum ether helps to control the release rate of the active ingredients in the attractant composition, so that the drug effect can be slowly and steadily radiated over a long period of time. 3. Improve the trapping effect: By accurately controlling the dosage and components of the volatile solution and coordinating with a slow-release carrier, the drug effect can be prolonged and the trapping effect can be improved, thereby more effectively preventing and controlling the sweet potato weevil pest. In short, the role of the lipophilic small molecular weight organic solution in this application is to dissolve and carry the active ingredients and control their release rate to prolong the drug effect and improve the trapping effect, thereby achieving effective prevention and control of the sweet potato weevil pest.

[0017] Preferably, the antioxidant consists of 2,6-di-tert-butyl-4-methylphenol and vitamin E in a mass fraction ratio of 2:1.

[0018] In a second aspect, the present application provides a method for preparing a sweet potato weevil sex attractant composition, using the following technical solution: As a general technical concept, the present application also provides a method for preparing the above-mentioned sweet potato weevil sex attractant composition, comprising the following steps: (Z)-3-dodecen-1-yl (E)-2-butenoate, a synergist, an odor compound, ethyl butyrate, an antioxidant and the like are mixed uniformly according to their mass fractions to obtain the sweet potato weevil sex attractant composition.

[0019] In a third aspect, the present application provides a sweet potato weevil attractant core, which adopts the following technical solution: As a general technical concept, the present application also provides a sweet potato weevil attractant core, including a slow-release carrier and the above-mentioned sweet potato weevil sex attractant composition, wherein the slow-release carrier is any one of a rubber stopper, a polyethylene slow-release bag, a polyvinyl chloride slow-release bag, and a polyvinyl chloride tube.

[0020] The method for preparing the sweet potato weevil attractant core comprises loading the sweet potato weevil sex attractant composition into the slow-release carrier to obtain the sweet potato weevil attractant core, wherein the sweet potato weevil attractant core contains 0.03-0.08 g of the sweet potato weevil sex attractant composition.

[0021] In summary, the beneficial technical effects of this application are: 1. Highly efficient trapping: (z)-3-dodecen-1-yl (e)-2-butenoate in the composition is the main sex pheromone component of the sweet potato weevil, which can effectively attract the sweet potato weevil. The addition of synergists (cis-3-hexenyl acetate and cis-13-octadecenal) significantly improves the trapping effect of the main sex pheromone, making it more efficient and lasting.

[0022] 2. Synergistic effect: The odor compounds are highly attractive to sweet potato weevils and work in synergy with the main sex pheromone, further enhancing the effectiveness of the attractant. This synergistic effect allows a small amount of attractant to achieve a significant effect.

[0023] 3. Long lasting effect: By precisely controlling the dosage and components of the volatile solution and combining it with a sustained-release carrier, the duration of the drug's effect can be extended. This means that a single application can last for a longer period of time, reducing the need for repeated applications and improving the convenience and economy of use.

[0024] 4. Environmental protection characteristics: The composition is highly efficient and environmentally friendly and will not cause significant pollution to the environment. Its composition design takes biosafety into consideration and avoids the ecological risks that may be caused by traditional pesticides.

[0025] 5. Low cost: The preparation method is simple and the cost is low, making this attractant easy to produce and apply on a large scale. This is an important advantage for agricultural control because it can reduce the overall control cost.

[0026] 6. No resistance: Since its mechanism of action is based on the natural behavior of insects (i.e., using sex pheromones for trapping), it is not prone to resistance. This is a clear advantage over many chemical pesticides, which often cause pests to develop resistance after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings used in the embodiments: Figure 1 The following is a physical picture of the matching trapping device used in the testing of each embodiment. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below in conjunction with the examples, but it will be appreciated by those skilled in the art that the following examples are only used to illustrate the present application and should not be considered as limiting the scope of the present application. In the examples, if specific conditions are not specified, they are carried out according to normal conditions or the conditions recommended by the manufacturer. If the manufacturer is not specified for the reagents or instruments used, they are all conventional products that can be purchased commercially.

[0029] In the following examples, 1 part means 0.1 g Example 1 A sweet potato weevil sex attractant composition, comprising the following raw materials by weight: 4 parts of (Z)-3-dodecen-1-yl (E)-2-butenoate, 3 parts of a synergist, 4 parts of an odor compound, 0.3 parts of an antioxidant, 1.5 parts of ethyl butyrate, and 40 parts of a volatile solution; wherein the synergist is prepared by mixing cis-3-hexenyl acetate and cis-13-octadecenal in a weight ratio of 5:1, and the odor compound is prepared by mixing nerol and phenylethyl alcohol in a weight ratio of 1:1. The volatile solution is acetone, and the antioxidant is composed of 2,6-di-tert-butyl-4-methylphenol and vitamin E in a mass fraction ratio of 2:1; the preparation method of the above-mentioned sweet potato weevil sex attractant composition comprises the following steps: according to the mass fractions, (Z)-3-dodecen-1-yl (E)-2-butenoate, enhancer, odor compound, ethyl butyrate, antioxidant and are mixed uniformly to obtain the sweet potato weevil sex attractant composition.

[0030] Example 2 A sweet potato weevil sex attractant composition, comprising the following raw materials by weight: 6 parts of (Z)-3-dodecen-1-yl (E)-2-butenoate, 4 parts of a synergist, 4 parts of an odor compound, 0.4 parts of an antioxidant, 2 parts of ethyl butyrate, and 45 parts of a volatile solution; wherein the synergist is prepared by mixing cis-3-hexene acetate and cis-13-octadecenal in a weight ratio of 5:5, and the odor compound is prepared by mixing nerol and phenylethyl alcohol in a weight ratio of 1:1. The composition is composed of a mass fraction ratio of 1:1, the volatile solution is petroleum ether, and the antioxidant is composed of 2,6-di-tert-butyl-4-methylphenol and vitamin E in a mass fraction ratio of 2:1; the preparation method of the above-mentioned sweet potato weevil sex attractant composition comprises the following steps: according to the mass fractions, (Z)-3-dodecen-1-yl (E)-2-butenoate, a synergist, an odor compound, ethyl butyrate, an antioxidant and are mixed uniformly to obtain the sweet potato weevil sex attractant composition.

[0031] Example 3 A sweet potato weevil sex attractant composition, comprising the following raw materials by weight: 5 parts of (Z)-3-dodecen-1-yl (E)-2-butenoate, 3.4 parts of a synergist, 4.6 parts of an odor compound, 0.35 parts of an antioxidant, 1.7 parts of ethyl butyrate, and 43 parts of a volatile solution; wherein the synergist is prepared by mixing cis-3-hexenyl acetate and cis-13-octadecenal in a weight ratio of 5:3, the odor compound is composed of nerol and phenylethyl alcohol in a weight ratio of 1:1, the volatile solution is n-hexane, and the antioxidant is composed of 2,6-di-tert-butyl-4-methylphenol and vitamin E in a weight ratio of 2:1; The preparation method of the above-mentioned sweet potato weevil sex attractant composition comprises the following steps: (Z)-3-dodecen-1-yl (E)-2-butenoate, a synergist, an odor compound, ethyl butyrate, and an antioxidant are mixed evenly according to parts by mass to obtain the sweet potato weevil sex attractant composition.

[0032] Example 4 The same as Example 3, except that the volatile solution is composed of n-hexane and petroleum ether in a mass fraction ratio of 1:1.

[0033] Example 5 The same as Example 4, except that the synergist is prepared by mixing cis-3-hexenyl acetate and cis-13-octadecenal in a mass ratio of 2:1.

[0034] Comparative Example 1 The same as Example 5, except that the synergist is cis-3-hexene acetate.

[0035] Comparative Example 2 The same as Example 5, except that the synergist is cis-13-octadecenal.

[0036] Comparative Example 3 The same as Example 5, except that the odor compound is nerol.

[0037] Comparative Example 4 The same as Example 5, except that the odor compound is phenylethyl alcohol.

[0038] Performance Testing 0.05 g of the sweet potato weevil sex attractant composition prepared in Examples 1 to 5 and Comparative Examples 1 to 4 was respectively injected into a slow-release carrier rubber plug to prepare a sweet potato weevil attractant core. The sweet potato weevil attractant core was then placed in a matching trapping device. Specifically, the trapping device (such as Figure 1As shown), it consists of a trap and a support rod, wherein the trap consists of a cover body, an upper barrel body and a lower barrel body. The upper barrel body is inverted, and an insect entering funnel extends downward from the middle part of the upper end surface of the upper barrel body, and the insect entering funnel is connected to the internal space of the lower barrel body. A hollow attractant core barrel is installed in the middle position of the cover plate, and the lower part of the attractant core barrel extends into the insect entering funnel, and the attractant core for sweet potato weevils can be placed in the attractant core barrel.

[0039] The test site was set up at the sweet potato planting base in Dongjiao Town, Xiuyu District, Putian City, Fujian Province (25°17′11″N, 119°8′38″E). The soil was hilly dryland, pH 7.3, and medium fertility. The sweet potato planting variety was Longshu No. 9, and peanuts were interplanted in mid-June. The test time was from August 30 to October 30, 2024. The upper cover of the sweet potato weevil trap was 10 cm away from the surface of the sweet potato leaves, and the traps were about 20 meters apart. The trapping test lasted for 30 days, with 5 traps set for each treatment, and data were surveyed every 5 days; the test results are shown in Table 1.

[0040] Table 1 Performance test Analyzing the data in Table 1, we can see that: 1) The sweet potato weevil sex attractant composition prepared in Examples 1 to 5 can efficiently trap sweet potato weevils and effectively prevent and control sweet potato weevils. At the same time, the sweet potato weevil sex attractant composition has the characteristics of stable performance, long lasting effect, and high efficiency.

[0041] 2) The performance comparison analysis of the sweet potato weevil sex attractant composition prepared in combination with Example 4 and Example 3 and Example 2 shows that the volatile solution is a lipophilic low molecular weight organic solution, which is composed of n-hexane and petroleum ether in a mass fraction ratio of 1:1. Its role is to act as a volatile carrier, used to dissolve and carry the effective ingredients in the sweet potato weevil sex attractant composition, and to control the release rate of these ingredients at the same time, so as to prolong the time of drug effect and improve the trapping effect. The synergistic effect between n-hexane and petroleum ether can produce the following effects: 1. Enhanced solubility: The solution after the two are mixed can more effectively dissolve the effective ingredients in the sex attractant composition, ensuring that these ingredients are evenly distributed in the solution. 2. Controlled release rate: The volatility of n-hexane and petroleum ether helps to control the release rate of the effective ingredients in the sex attractant composition, so that the drug effect can be slowly and steadily developed over a long period of time. 3. Improve the trapping effect: By accurately controlling the dosage and components of the volatile solution, and coordinating the slow-release carrier, the time for the drug effect to be exerted can be extended, the trapping effect can be improved, and the sweet potato weevil pest can be more effectively prevented and treated. In short, the role of the lipophilic small molecular weight organic solution in this application is to dissolve and carry the active ingredient, and control its release rate, so as to extend the time for the drug effect to be exerted and improve the trapping effect, thereby achieving effective prevention and control of the sweet potato weevil pest.

[0042] 3) The performance comparison analysis of the sweet potato weevil sex attractant composition prepared in combination with Example 5 and Example 4 and Comparative Examples 1-Comparative Examples 2 shows that the synergist is prepared by mixing cis-3-hexenyl acetate and cis-13-octadecenal in a mass ratio of 2:1. The role of the synergist in this application is to significantly improve the trapping effect and high efficiency and durability of the sweet potato weevil sex attractant composition. When cis-3-hexenyl acetate and cis-13-octadecenal are mixed in a specific mass ratio of 2:1, the synergistic effect between them is utilized to significantly improve the trapping effect and high efficiency and durability of the sweet potato weevil sex attractant composition, thereby achieving effective prevention and control of sweet potato weevil pests.

[0043] 4) The performance comparison analysis of the sweet potato weevil sex attractant composition prepared in combination with Example 5 and Comparative Examples 3-4 shows that the odor compound is composed of nerol and phenylethanol in a mass ratio of 1:1, and its function is to enhance the attraction of the sweet potato weevil sex attractant composition to the sweet potato weevil. Both nerol and phenylethanol are compounds with special odors, and they have a strong attraction to the sweet potato weevil. When these two compounds are mixed, the interaction between them can produce a stronger attraction, making the sweet potato weevil more easily attracted by the attractant composition. By utilizing the synergistic effect between them, the trapping effect and high efficiency and durability of the sweet potato weevil sex attractant composition are significantly improved, thereby achieving effective prevention and control of the sweet potato weevil pest.

[0044] The above embodiments are only used to explain the technical solutions of the present application rather than to limit them. Although the above embodiments provide a specific description of the present application, relevant technical personnel should understand that the specific implementation modes of the present invention can still be modified or replaced by equivalents, and any modifications and equivalent replacements that do not depart from the spirit and scope of the present application should be included in the scope of protection of the present application.

Claims

1. A sweet potato weevil sex attractant composition, characterized in that: The preparation raw materials include, by weight: 4-6 parts of (Z)-3-dodecen-1-yl (E)-2-butenoate, 3-4 parts of a synergist, 4-6 parts of an odor compound, 0.3-0.4 parts of an antioxidant, 1.5-2 parts of ethyl butyrate, and 40-45 parts of a volatile solution; wherein the synergist is prepared by mixing cis-3-hexenyl acetate and cis-13-octadecenal.

2. A sweet potato weevil sex attractant composition according to claim 1, characterized in that: The mass ratio of cis-3-hexene acetate to cis-13-octadecenal is 5:1-5.

3. A sweet potato weevil sex attractant composition according to claim 2, characterized in that: The mass ratio of cis-3-hexene acetate to cis-13-octadecenal is 2:

1.

4. A sweet potato weevil sex attractant composition according to claim 1, characterized in that: The odor compound consists of nerol and phenylethyl alcohol in a mass ratio of 1:

1.

5. A sweet potato weevil sex attractant composition according to claim 1, characterized in that: The volatile solution is a lipophilic small molecular weight organic solution, and the lipophilic small molecular weight organic solution is at least one of acetone, petroleum ether and n-hexane.

6. A sweet potato weevil sex attractant composition according to claim 5, characterized in that: The lipophilic small molecular weight organic solution is composed of n-hexane and petroleum ether in a mass fraction ratio of 1:

1.

7. A sweet potato weevil sex attractant composition according to claim 1, characterized in that: The antioxidant consists of 2,6-di-tert-butyl-4-methylphenol and vitamin E in a mass fraction ratio of 2:

1.

8. A method for preparing a sweet potato weevil sex attractant composition according to any one of claims 1 to 7, characterized in that: The following steps are involved: According to the weight proportions, (Z)-3-dodecen-1-yl (E)-2-butenoate, synergist, odor compound, ethyl butyrate, antioxidant and the like are uniformly mixed to obtain a sweet potato weevil sex attractant composition.

9. A sweet potato weevil bait, characterized in that: The invention comprises a sustained-release carrier and a sweet potato weevil sex attractant composition as described in any one of claims 1 to 7, wherein the sustained-release carrier is any one of a rubber stopper, a polyethylene sustained-release bag, a polyvinyl chloride sustained-release bag and a polyvinyl chloride tube.

10. A method for preparing a sweet potato weevil attractant core according to claim 9, wherein the sweet potato weevil sex attractant composition is loaded into the slow-release carrier to obtain a sweet potato weevil attractant core, characterized in that: The sweet potato weevil attractant core contains 0.03-0.08 g of the sweet potato weevil sex attractant composition.

Images