CN117770272A - Tea caterpillar sex attractant as well as preparation method and application method thereof - Google Patents
Tea caterpillar sex attractant as well as preparation method and application method thereof Download PDFInfo
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- CN117770272A CN117770272A CN202311573984.8A CN202311573984A CN117770272A CN 117770272 A CN117770272 A CN 117770272A CN 202311573984 A CN202311573984 A CN 202311573984A CN 117770272 A CN117770272 A CN 117770272A
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- Catching Or Destruction (AREA)
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Abstract
The invention relates to the technical field of pest control and discloses a tea caterpillar sex attractant, a preparation method and an application method thereof, wherein the sex attractant comprises effective components, the effective components comprise a composite pheromone and a synergist, the mass ratio of the composite pheromone to the synergist is (85-125) (16-24), the composite pheromone comprises (R) -10, 14-dimethyl pentadecyl isobutyrate, (R) -10, 14-dimethyl pentadecyl n-butyrate, (S) -10, 14-dimethyl pentadecyl n-butyrate and 14-methyl pentadecyl isobutyrate, and the synergist comprises linalool, benzyl alcohol, cis-3-hexenal and indole. According to the invention, through the synergistic effect of the composite pheromone and the synergist, the trapping effect of the sex attractant is effectively improved, the moth trapping effect is improved by 2 times, meanwhile, the best-fit trap is screened out for the tea caterpillar high-efficiency sex attractant, the next-generation tea caterpillar has a better control effect on the occurrence of the next-generation tea caterpillar, and the larva population in a treatment area is reduced by 72.8% compared with that in a control area, so that the control requirement is met.
Description
Technical Field
The invention relates to the technical field of pest control, in particular to a tea caterpillar sex attractant and a preparation method and an application method thereof.
Background
Tea caterpillar (Euproctis pseudoconspersa) belongs to lepidoptera moth and is an important pest species in tea gardens in China. The tea leaves are distributed in tea gardens in all places in China, the tea leaves are eaten by larvae, and when the tea leaves are severe, the tea leaves can be eaten completely, so that the tea yield and the tree vigor are affected. In addition, the toxic hair on the tea caterpillar larvae touches the skin of a human body to cause pain and itch, and the management of tea gardens, the picking of tea and the processing of tea are seriously affected. Therefore, in the tea production process, the prevention and treatment of tea caterpillars are key links. At present, the prevention and control of tea caterpillars mainly depend on chemical pesticides, however, the chemical resistance is enhanced due to the fact that the chemical pesticides are used in large quantities, and the quality safety of tea leaves and the ecological safety of tea gardens are seriously affected.
The sex pheromone is a trace chemical substance secreted by female adult gonads in vitro, can be accepted by homoplasmic male moth receptors and causes the sex pheromone to generate directional coupling behaviors. The tea trichomonas pheromones reported in 1994 to be 10, 14-dimethylpentadecanol isobutyrate and 14-methylpentadecanol isobutyrate by Sadao Wakamura. The sex attraction effect formed by adding 4 micrograms or 16 micrograms of 14-methylpentadecyl isobutyrate into 80 micrograms of 10, 14-dimethylpentadecyl isobutyrate is optimal. Domestic researches report that the tea caterpillar of Chinese population only contains one personality pheromone component of 10, 14-dimethyl pentadecyl alcohol isobutyrate, so that the tea caterpillar sex attractant is prepared by the conventional method in the field, and all the tea caterpillar sex attractant is prepared by using 10, 14-dimethyl pentadecyl alcohol isobutyrate. However, wang Yongmo et al found that after setting up tea caterpillar sex attractant of only 10, 14-dimethyl pentadecyl isobutyrate in the field, the next generation larva generation amount was reduced by only 27.87% -50.85%, which could not meet the control requirement.
Sex pheromones have advantages in ecological protection and environmental friendliness, and have been successfully applied to population monitoring and control of part of pests. However, the attracting effect of the sex attractant on the market cannot meet the control requirements. In order to enhance the trapping effect of sex pheromones, intensive studies on the composition and the method of adding a synergistic agent are required. The pollution-free control of the tea caterpillars is hopeful to be realized by improving the trapping effect of sex pheromones on male moths and matching with the efficient matching application technology of the sex attractant.
Disclosure of Invention
Therefore, the invention aims to provide the tea caterpillar sex attractant, the preparation method and the application method thereof, and the trapping effect of the sex attractant is effectively improved through the synergistic effect between the composite pheromone and the synergistic agent, so that the control effect can reach more than 70%, and the long-term and effective control of tea caterpillar is realized.
The invention discloses a tea caterpillar sex attractant which comprises effective components, wherein the effective components comprise a composite pheromone and a synergist, the mass ratio of the composite pheromone to the synergist is (85-125) (16-24), and the composite pheromone comprises the following raw materials in parts by weight: 70-80 parts of (R) -10, 14-dimethyl pentadecyl alcohol isobutyrate, 5-15 parts of (R) -10, 14-dimethyl pentadecyl alcohol n-butyrate, 5-15 parts of (S) -10, 14-dimethyl pentadecyl alcohol n-butyrate and 5-15 parts of 14-methyl pentadecyl alcohol isobutyrate.
Further, the composite pheromone comprises the following raw materials in parts by weight: 75 parts of (R) -10, 14-dimethyl pentadecyl alcohol isobutyrate, 5-15 parts of (R) -10, 14-dimethyl pentadecyl alcohol n-butyrate, 5-15 parts of (S) -10, 14-dimethyl pentadecyl alcohol n-butyrate and 5-15 parts of 14-methyl pentadecyl alcohol isobutyrate.
Further, the composite pheromone comprises the following raw materials in parts by weight: 70-80 parts of (R) -10, 14-dimethyl pentadecyl alcohol isobutyrate, 10 parts of (R) -10, 14-dimethyl pentadecyl alcohol n-butyrate, 10 parts of (S) -10, 14-dimethyl pentadecyl alcohol n-butyrate and 5-15 parts of 14-methyl pentadecyl alcohol isobutyrate.
Further, the composite pheromone comprises the following raw materials in parts by weight: 75 parts of (R) -10, 14-dimethyl pentadecyl alcohol isobutyrate, 10 parts of (R) -10, 14-dimethyl pentadecyl alcohol n-butyrate, 10 parts of (S) -10, 14-dimethyl pentadecyl alcohol n-butyrate and 10 parts of 14-methyl pentadecyl alcohol isobutyrate.
Further, the synergist comprises the following raw materials in parts by weight: 4-6 parts of linalool, 4-6 parts of benzyl alcohol, 4-6 parts of cis-3-hexenal and 4-6 parts of indole.
The inventor optimizes the proportion of the composite pheromone and the synergist, and the synergistic effect between the two improves the trapping effect of the sex attractant on the tea caterpillars, and the trapping effect of the sex attractant is enhanced by more than 2 times compared with the commercial tea caterpillars sex attractant.
Further, the solvent is any one of n-hexane, absolute ethyl alcohol, methylene dichloride and liquid paraffin. The solvent concentration is not particularly limited, and the sex attractant raw material can be completely dissolved.
In a second aspect, the invention also discloses a preparation method of the tea caterpillar sex attractant, which comprises the following steps:
s1, adding the complex pheromone into an organic solvent to prepare a solution;
s2, adding the modified silicon nano particles into the solution in the step S1, wherein the mass ratio of the modified silicon nano particles to the solution is 1:25, stirring for 2-24 hours, and drying to remove the organic solvent to obtain first core particles;
s3, mixing the first core material particles and the synergist, adding the wall material solution, uniformly stirring, adding the ion cross-linking agent solution with the concentration of 0.5-0.7g/L, and stirring to obtain a homogeneous solution;
and S4, spray-drying the homogenized liquid in the step S3, and collecting a spray-dried product, namely the tea caterpillar sex attractant.
The modified silicon nano particles completely contain and cover the composite pheromone, are not influenced by external temperature and illumination, and improve the attracting effect and illumination stability of the tea caterpillar sex attractant. The synergistic agent and the wall material solution are added and coated on the outer surface of the core material particles, so that the attracting effect and stability of the tea caterpillar sex attractant can be further ensured.
Further, the preparation method of the modified silicon nano-particles comprises the following steps: controlling the vacuum degree to be 2 multiplied by 10 -2 Heating to 85-115 deg.c at 8X 10-2Pa, introducing argon, and activating the surface of the nanometer silicon particle with argon plasma for 2-4min.
Further, the preparation steps of the wall material solution are as follows: adding fatty glyceride and polyoxyethylene fatty acid ester into cyclohexane, and stirring for 5-15min to obtain a mixed solution; adding chitosan into the mixed solution, and stirring for 20-45min under nitrogen atmosphere; adding potassium persulfate and N, N' -methylene bisacrylamide, heating to 60-80 ℃, stirring at a speed of 500-800rpm for reaction for 1-1.5h, and cooling to room temperature to obtain the wall material solution.
The modified silicon nano particles have stable high specific surface and skeleton structure and strong surface activity, so that not only can the tea caterpillar composite pheromone be completely contained and coated to avoid sunlight irradiation and reduce isomerization caused by illumination, but also the composite pheromones with different sizes and types can be effectively loaded and conveyed and the release speed of the composite pheromone can be controlled, the fixing effect of the composite pheromone can be obviously enhanced, and the slow release effect of the tea caterpillar composite attractant is effectively ensured.
The chitosan is subjected to surface activation and then cross-linking reaction to form a wall material solution, so that the chemical stability and the thermal stability of the chitosan are improved. The wall material has the advantages of high mechanical strength and water resistance, and is not easy to break in application of the tea caterpillar sex attractant, and better performance such as rainwater dissolution can not be realized. The wall material solution forms a wall material structure of the tea caterpillar sex attractant, so that the release rate of the tea caterpillar composite pheromone can be effectively controlled. The synergistic agent is released in the release process of the tea caterpillar compound pheromone, so that the trapping effect of the tea caterpillar compound pheromone is improved, the slow release effect of the tea caterpillar compound pheromone is improved, and the drug effect period is prolonged.
The modified silicon nano particles and the sex attractant form a wall material solution by surface activation and then cross-linking reaction, so that the stability of the tea caterpillar composite pheromone can be improved, the tea caterpillar composite pheromone can be protected from adverse effects of external environment, such as light, oxygen, humidity and the like, and the effectiveness of the tea caterpillar composite pheromone can be prolonged and the activity of the tea caterpillar composite pheromone can be maintained.
In a third aspect, the invention also discloses an application method of the tea caterpillar sex attractant, the tea caterpillar sex attractant is put into a barrel-shaped trapper, the hanging density of the trapper is 60-75 sets per hectare, and the hanging height is 15-25 cm, and the trapper is put into use.
Further, the tea caterpillar sex attractant is placed in an amount of 20-80mg in each trap.
The invention has the beneficial effects that:
(1) The sex attractant disclosed by the invention comprises the composite pheromone and the synergist, and can better simulate and release the sex pheromone of the tea caterpillars, so that more male tea caterpillars are attracted, the sex proportion of population is changed by a large number of trapping modes, and then the mating rate of adults and the number of insect mouths of next-generation larvae are reduced, so that the purpose of killing insects is achieved.
(2) According to the sex attractant for the tea caterpillars, the important micro-components and the synergistic agent are added into the raw materials, so that the trapping effect of the sex attractant on the tea caterpillars is improved by more than 2 times.
(3) The tea caterpillar sex attractant formed by combining modified silicon nano particle encapsulation and chitosan which is subjected to surface activation and then crosslinking reaction can realize more accurate control of the release rate of pheromone. The modified silicon nano-particles encapsulate the primary rate of release of the encapsulated pheromone, and the chitosan wall material solution which is subjected to surface activation and then crosslinking reaction provides a further coating layer, so that the release rate is more controlled. This helps to prolong the release time of sex pheromone, reduce waste, and improve the trapping effect on tea caterpillars.
(4) The application technology of the tea caterpillar sex attractant provided by the invention obviously improves the application effect of the tea caterpillar, achieves the field control effect of more than 70%, and can meet the actual requirements of the tea caterpillar sex attractant for controlling the tea caterpillar.
Drawings
FIG. 1 shows different trap types (A) and their trapping effect (B) on tea caterpillars;
FIG. 2 shows the field attracting activity of the sex attractant of the present invention and commercial products on male and female tea caterpillars;
figure 3 is a graph showing the density of tea caterpillar larvae hatchway in the sex attractant treated and control regions.
Detailed Description
The present invention will be described in detail with reference to the following specific examples:
the invention provides a tea caterpillar sex attractant, which comprises effective components of a composite pheromone and a synergist, wherein the mass ratio of the composite pheromone to the synergist is (85-125) (16-24), and the composite pheromone comprises the following raw materials: 4 compounds of (R) -10, 14-dimethyl pentadecyl alcohol isobutyrate, (R) -10, 14-dimethyl pentadecyl alcohol n-butyrate, (S) -10, 14-dimethyl pentadecyl alcohol n-butyrate and 14-methyl pentadecyl alcohol isobutyrate. Among them, the sources of the 4 compounds are not particularly limited, and standard compounds having a purity of 99% or more are preferable.
The sex attractant of the invention preferably also comprises a synergist, wherein the synergist comprises linalool, benzyl alcohol, cis-3-hexenal and indole.
The organic solvent in the invention can be any one of normal hexane, absolute ethyl alcohol, methylene dichloride and liquid paraffin. N-hexane or methylene chloride is preferable, and the solvent concentration is not particularly required in the present invention, and the sex attractant raw material can be completely dissolved.
The invention is further described in detail below with reference to examples:
example 1-example 9
The sex attractant according to the examples of Table 1 was composed at different levels.
S1: 100ml of n-hexane was added to the sample bottle as a solvent
S2: the components in the table 1 are respectively weighed and added into a solvent to be stirred and mixed uniformly, so as to obtain the sex attractant;
s3: the sex attractant of examples 1-9 was added to a natural devulcanized rubber head;
s4: the rubber heads of the additive attractant of examples 1-9 were placed in a barrel-shaped trap and hung in a tea garden during the emergence period of field tea caterpillar adults, each treatment was repeated 4 times, different treatment groups were placed alternately for one month, the number of male tea caterpillar in the trap was recorded every 5 days, after each investigation was completed, new armyworm plates were replaced, the trap positions were exchanged, errors were eliminated, and the experimental sites were tin-free markets. The experimental results are shown in table 2.
TABLE 2 trapping effects of different treatments on Male tea caterpillar
As can be seen from Table 2, example 5 is the best combination, with the greatest trapping of tea caterpillars. The comparative example 1 has no synergist and less trapping amount, and proves that the synergist can effectively increase the trapping activity of the sex attractant.
Example 10
The present example is of different trap types (a) and their trapping effect (B) on tea caterpillars.
S1: the tea caterpillar sex attractant was formulated as in example 5.
S2: 5 kinds of more commonly used moth insect traps are selected, sex attractant is placed in the traps and hung in a tea garden in the emergence period of field tea caterpillar adults, each trap is repeated for 4 times, the trapping amount of male moth in the traps is investigated every week, and the experimental place is tin-free city.
Because the coupling behaviors of the moth insects are different, the sex attractant traps suitable for different moth insects are different. The trap suitable for the tea caterpillars is screened out, and has important significance for improving the control effect of the tea caterpillars sex attractant. Figure 1 shows that of the 5 moth-type traps, the barrel-shaped trap is optimal, followed by the boat-shaped trap and the triangular trap; the effect of the barrel trap on the tea caterpillar male moth is 2 times that of the boat trap and the triangle trap.
Example 11
This example is one of the preparation methods of the tea caterpillar sex attractant.
Preparation of modified silicon nanoparticles:
controlling the vacuum degree to be 2 multiplied by 10 -2 Pa, heating to 85 ℃, introducing argon, and carrying out surface activation treatment on the silicon nano particles by adopting argon plasma under vacuum for 4min.
Preparation of wall material solution:
adding fatty glyceride and polyoxyethylene fatty acid ester into cyclohexane, and stirring for 5min to obtain a mixed solution; adding chitosan into the mixed solution, and stirring for 20min under the nitrogen atmosphere; adding potassium persulfate and N, N' -methylene bisacrylamide, heating to 60 ℃, stirring at a speed of 500rpm for reaction for 1.5 hours, and cooling to room temperature to obtain the wall material solution.
Preparation of tea caterpillar sex attractant:
s1, adding the complex pheromone composed of the parts of the components in the example 5 into 100ml of organic solvent to prepare a solution;
s2, adding the modified silicon nano particles into the solution in the step S1, wherein the mass ratio of the modified silicon nano particles to the solution is 1:25, stirring for 2 hours, and drying to remove the organic solvent to obtain first core particles;
s3, mixing the first core material particles and the synergist formed by 5 parts of the embodiment, adding the wall material solution, uniformly stirring, adding the ionic cross-linking agent solution with the concentration of 0.5g/L, and stirring to obtain a homogeneous solution;
and S4, spray-drying the homogenized liquid in the step S3, and collecting a spray-dried product, namely the tea caterpillar sex attractant.
Example 12
This example is one of the preparation methods of the tea caterpillar sex attractant.
Preparation of modified silicon nanoparticles:
controlling the vacuum degree to be 5 multiplied by 10 -2 Pa, heating to 100 ℃, introducing argon, and carrying out surface activation treatment on the silicon nano particles by adopting argon plasma under vacuum for 3min.
Preparation of wall material solution:
adding fatty glyceride and polyoxyethylene fatty acid ester into cyclohexane, and stirring for 10min to obtain a mixed solution; adding chitosan into the mixed solution, and stirring for 35min under the nitrogen atmosphere; adding potassium persulfate and N, N' -methylene bisacrylamide, heating to 70 ℃, stirring at a speed of 650rpm for reaction for 1.25h, and cooling to room temperature to obtain the wall material solution.
Preparation of tea caterpillar sex attractant:
s1, adding the complex pheromone composed of the parts of the components in the example 5 into 100ml of organic solvent to prepare a solution;
s2, adding the modified silicon nano particles into the solution in the step S1, wherein the mass ratio of the modified silicon nano particles to the solution is 1:25, stirring for 13h, and drying to remove the organic solvent to obtain first core particles;
s3, mixing the first core material particles and the synergist formed by 5 parts of the embodiment, adding the wall material solution, uniformly stirring, adding the ion cross-linking agent solution with the concentration of 0.6g/L, and stirring to obtain a homogeneous solution;
and S4, spray-drying the homogenized liquid in the step S3, and collecting a spray-dried product, namely the tea caterpillar sex attractant.
Example 13
This example is one of the preparation methods of the tea caterpillar sex attractant.
Preparation of modified silicon nanoparticles:
controlling the vacuum degree to be 8 multiplied by 10 -2 Pa, heating to 115 ℃, introducing argon, and carrying out surface activation treatment on the silicon nano particles by adopting argon plasma under vacuum for 2min.
Preparation of wall material solution:
adding fatty glyceride and polyoxyethylene fatty acid ester into cyclohexane, and stirring for 15min to obtain a mixed solution; adding chitosan into the mixed solution, and stirring for 45min under the nitrogen atmosphere; adding potassium persulfate and N, N' -methylene bisacrylamide, heating to 80 ℃, stirring at a speed of 800rpm for reaction for 1h, and cooling to room temperature to obtain the wall material solution.
Preparation of tea caterpillar sex attractant:
s1, adding the complex pheromone composed of the parts of the components in the example 5 into 100ml of organic solvent to prepare a solution;
s2, adding the modified silicon nano particles into the solution in the step S1, wherein the mass ratio of the modified silicon nano particles to the solution is 1:25, stirring for 24 hours, and drying to remove the organic solvent to obtain first core particles;
s3, mixing the first core material particles and the synergist formed by 5 parts of the embodiment, adding the wall material solution, uniformly stirring, adding the ion cross-linking agent solution with the concentration of 0.7g/L, and stirring to obtain a homogeneous solution;
and S4, spray-drying the homogenized liquid in the step S3, and collecting a spray-dried product, namely the tea caterpillar sex attractant.
Example 14
The tea caterpillar sex attractant prepared in this example is different from the tea caterpillar sex attractant prepared in example 12 in that the silicon nanoparticles are not modified.
Example 15
The tea caterpillar sex attractant prepared in this example is different from the tea caterpillar sex attractant prepared in example 12 in that a common chitosan solution is directly used as a wall material solution.
Example 16
The tea caterpillar attractant prepared in this example is different from the tea caterpillar attractant prepared in example 12 in that unmodified nanoparticles and a common chitosan solution are used directly as a wall material solution
During the emergence period of field tea caterpillar adults, the tea caterpillar sex attractant prepared in example 11, example 12, example 13, example 14, example 15, example 16, and commercially available tea caterpillar sex attractant were placed in barrel traps, suspended in tea gardens, 5 replicates were set per treatment, and 50mg of sex attractant was placed per trap. The height of the traps is 20cm higher than the tea canopy surface, one set of traps is placed every 15 meters, and different treatment groups are placed alternately.
The number of adult tea moth in the trap was recorded every 15 days, and after each recording, the new armyworm plate was replaced, but the sex attractant was not replaced, the trap position was exchanged, the error was eliminated, and the recording was continued for 4 months, and the experimental site was tin-free city, as shown in table 3.
TABLE 3 Table 3
As can be seen from Table 3, the tea caterpillar sex attractant prepared by the invention (examples 11-13) has a lasting time of 120 days, wherein example 12 has the best lasting effect, example 14 and example 15 have the rapid decrease in the amount of tea caterpillar attracted by the sex attractant after 60 days, example 16 has the rapid decrease in the amount of tea caterpillar attracted after 30 days, and example 14, example 15 and example 16 have the stability and durability which are not feasible and are easily adversely affected by external environment, while the tea caterpillar sex attractant prepared by the invention has stable performance due to the modified silicon nano particles and wall material solution, has long lasting effectiveness and good activity, can last for 4 months, and reduces the replacement frequency.
Example 17
This example shows the field attracting activity of the sex attractant of example 12 and commercial products against male and female tea caterpillars.
4 tea caterpillar sex attractant products of relatively known insect sex attractant production enterprises are selected as comparison, 50mg sex attractant is placed in a barrel-shaped trapper and hung in a tea garden in the emergence period of field tea caterpillar adults, each treatment is repeated 4 times, the trapping amount of male moths in the trapper is investigated every week, and experimental sites are tin-free city and Guilin.
The field experiment result is shown in figure 2, the sex attractant obtained by the invention shows higher activity in the field, and the trapping amount of the sex attractant on the male moths of the tea caterpillars is more than 3 times of that of a commercial product.
Example 18
This example is the density of the tea caterpillar larvae ports in the sex attractant treated and control areas.
S1: the tea caterpillar sex attractant was formulated as in example 12.
S2: in the emergence period of field tea caterpillar adults, a barrel-shaped trapper is selected, wherein the trapper is arranged at a height of 20cm above the tea canopy surface and at a density of 60 sets/hectare. The area of the treatment area and the control area are 1 hectare, and the interval between the two areas is more than 50 m.
S3: 10 check points are selected in the treatment area and the control area respectively, each check point is a 5m tea row, after the adult eclosion is finished for 1 month, the number of larva insect mouths of each check point is recorded, and the experimental place is tin-free city.
Figure 3 shows that the tea caterpillar sex attractant obtained by the invention is matched with the best-fit trap screened by the invention, and the larva quantity of the sex attractant treatment area is 27.2% of that of the control area at the dosage of 60 sets per hectare, so that the control of tea caterpillar is realized.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention. The technology, shape, and construction parts of the present invention, which are not described in detail, are known in the art.
Claims (10)
1. A tea caterpillar sex attractant comprises active ingredients and is characterized in that: the effective components comprise a composite pheromone and a synergist, wherein the mass ratio of the composite pheromone to the synergist is (85-125) (16-24), and the composite pheromone comprises the following raw materials in parts by weight: 70-80 parts of (R) -10, 14-dimethyl pentadecyl alcohol isobutyrate, 5-15 parts of (R) -10, 14-dimethyl pentadecyl alcohol n-butyrate, 5-15 parts of (S) -10, 14-dimethyl pentadecyl alcohol n-butyrate and 5-15 parts of 14-methyl pentadecyl alcohol isobutyrate.
2. A tea caterpillar sex attractant according to claim 1, wherein: the composite pheromone comprises the following raw materials in parts by weight: 75 parts of (R) -10, 14-dimethyl pentadecyl alcohol isobutyrate, 5-15 parts of (R) -10, 14-dimethyl pentadecyl alcohol n-butyrate, 5-15 parts of (S) -10, 14-dimethyl pentadecyl alcohol n-butyrate and 5-15 parts of 14-methyl pentadecyl alcohol isobutyrate.
3. A tea caterpillar sex attractant according to claim 1, wherein: the composite pheromone comprises the following raw materials in parts by weight: 70-80 parts of (R) -10, 14-dimethyl pentadecyl alcohol isobutyrate, 10 parts of (R) -10, 14-dimethyl pentadecyl alcohol n-butyrate, 10 parts of (S) -10, 14-dimethyl pentadecyl alcohol n-butyrate and 5-15 parts of 14-methyl pentadecyl alcohol isobutyrate.
4. A tea caterpillar sex attractant according to claim 1, wherein: the composite pheromone comprises the following raw materials in parts by weight: 75 parts of (R) -10, 14-dimethyl pentadecyl alcohol isobutyrate, 10 parts of (R) -10, 14-dimethyl pentadecyl alcohol n-butyrate, 10 parts of (S) -10, 14-dimethyl pentadecyl alcohol n-butyrate and 10 parts of 14-methyl pentadecyl alcohol isobutyrate.
5. A tea caterpillar sex attractant according to claim 1, wherein: the synergist comprises the following raw materials in parts by weight: 4-6 parts of linalool, 4-6 parts of benzyl alcohol, 4-6 parts of cis-3-hexenal and 4-6 parts of indole.
6. A process for the preparation of a tea caterpillar sex attractant as claimed in any one of claims 1 to 5, wherein: the preparation method comprises the following steps:
s1, adding the complex pheromone into an organic solvent to prepare a solution;
s2, adding the modified silicon nano particles into the solution in the step S1, wherein the mass ratio of the modified silicon nano particles to the solution is 1:25, stirring for 2-24 hours, and drying to remove the organic solvent to obtain first core particles;
s3, mixing the first core material particles and the synergist, adding the wall material solution, uniformly stirring, adding the ion cross-linking agent solution with the concentration of 0.5-0.7g/L, and stirring to obtain a homogeneous solution;
and S4, spray-drying the homogenized liquid in the step S3, and collecting a spray-dried product, namely the tea caterpillar sex attractant.
7. The method for preparing the tea caterpillar sex attractant according to claim 6, wherein the method comprises the following steps: the preparation method of the modified silicon nano-particles comprises the following steps: controlling the vacuum degree to be 2 multiplied by 10 -2 Up to 8X 10 -2 Pa, heating to 85-115 ℃, introducing argon, and carrying out surface activation treatment on the silicon nano particles by adopting argon plasma under vacuum for 2-4min.
8. The method for preparing the tea caterpillar sex attractant according to claim 6, wherein the method comprises the following steps: the preparation method of the wall material solution comprises the following steps: adding fatty glyceride and polyoxyethylene fatty acid ester into cyclohexane, and stirring for 5-15min to obtain a mixed solution; adding chitosan into the mixed solution, and stirring for 20-45min under nitrogen atmosphere; adding potassium persulfate and N, N' -methylene bisacrylamide, heating to 60-80 ℃, stirring at a speed of 500-800rpm for reaction for 1-1.5h, and cooling to room temperature to obtain the wall material solution.
9. A method of using a tea caterpillar sex attractant as claimed in any one of claims 1 to 8, wherein: the tea caterpillar sex attractant is put into a barrel-shaped trapper, the hanging density of the trapper is 60-75 sets per hectare, and the hanging height of the trapper is 15-25 cm, and the trapper is put into use.
10. The method of using a tea caterpillar sex attractant according to claim 9, wherein: the tea caterpillar sex attractant in each trap is 20-80mg.
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