Fungus control agent for desmodium mongolicum and preparation method of fungus control agent for desmodium mongolicum

Abstract

The invention relates to the technical field of fungus prevention and control agents, and discloses a fungus prevention and control agent for Mongolia desmodium and a manufacturing method thereof.The fungus prevention and control agent for Mongolia desmodium is obtained after beauveria bassiana, sophocarpidine and auxiliaries are added into a stirrer to be stirred, and then the fungus prevention and control agent for Mongolia desmodium is obtained; beauveria bassiana can infect adults of Mongolia and colonize the adults of Mongolia in the early stage of infection, hyphae start to rapidly grow by means of nutrient substances and water on the body walls of the adults, germinate and invade the interiors of the adults, and the structures of the adults are decomposed; in the later stage of infection, hyphae invade muscular tissues of insect bodies, the insect bodies move slowly, the hyphae obtain nutrient substances in intestinal structures of the insects for mass propagation, and meanwhile, the insect bodies are difficult to obtain sufficient nutrient substances and die due to physiological metabolism disorder; the matrine and the beauveria bassiana have good compatibility, and can cooperate with the beauveria bassiana; in addition, the silver-containing titanium dioxide, the modified cardanol and the nano TiO2 have a relatively good antifungal effect.

Description

Technical Field

[0001] The invention relates to the technical field of fungus control agents, in particular to a fungus control agent for Pseudomonas mongolica and a preparation method thereof. Background Art

[0002] The Mongolian ground beetle is an underground pest that has continued to cause damage in tobacco-growing areas in Liangshan Prefecture, Sichuan Province in recent years. At present, the prevention and control of this insect mainly relies on chemical agents, but chemical control is not conducive to the protection of the ecological environment of tobacco fields and the improvement of tobacco quality. The use of insect pathogenic fungi for biological control is very consistent with the current needs of green pest control; since underground pests are mainly controlled by chemicals, excessive use of chemical pesticides has led to ecological damage and increased pest resistance. How to avoid this phenomenon is the key to solving the problem. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] In view of the shortcomings of the prior art, the present invention provides a fungus control agent for Pseudomonas mongolica and a preparation method thereof, which has a good control effect.

[0005] (II) Technical solution

[0006] To achieve the above object, the present invention provides the following technical solution: a fungal control agent for Mongolian ground beetle, characterized in that it comprises the following components by weight: 60-80 parts by weight of Beauveria bassiana, having CGMCC preservation number 40918, 1-3 parts by weight of matrine, and 0.2-0.4 parts by weight of an auxiliary agent.

[0007] Preferably, the preparation method of the auxiliary agent is:

[0008] (1) adding 10-15 parts by weight of anhydrous ethanol, 8-12 parts by weight of distilled water, and 1-3 parts by weight of glacial acetic acid to a reactor and stirring them uniformly, then adding 0.01-0.03 mol / L concentrated nitric acid to adjust the pH to 2-3, continuing to add 6-12 parts by weight of silver nitrate to the reactor, stirring at 20-30° C. for 15-25 minutes to obtain solution A; adding 3-8 parts by weight of anhydrous ethanol to a flask, adding 10-16 parts by weight of butyl titanate under stirring, stirring for 20-30 minutes to obtain solution B; slowly adding solution B dropwise to solution A, stirring for 1-2 hours, aging at 20-25° C. for 20-28 hours, drying, and grinding to obtain silver-containing titanium dioxide;

[0009] (2) adding cardanol and ε-caprolactone into a reactor and stirring evenly, introducing nitrogen protection, then adding stannous octoate catalyst, reacting at 90-130° C. for 6-12 hours, and after the reaction is completed, first dissolving the crude product with chloroform, and then precipitating with anhydrous ether, repeating the dissolution and precipitation 2-4 times, and vacuum drying the product to obtain modified cardanol;

[0010] (3) adding tetrabutyl titanate to distilled water, stirring and dissolving, adding hexadecyltrimethylammonium bromide aqueous solution and urea, pouring the solution into a reaction kettle, reacting at 40-70° C. for 2-6 hours, and obtaining brominated nano-TiO2;

[0011] (4) adding brominated nano-TiO2 and 3-aminopropylmethyldiethoxysilane to a mixed solvent of distilled water and ethanol, and reacting at 30-60° C. for 6-8 hours after ultrasonic dispersion, centrifuging, and washing with ethanol and acetone in sequence to obtain amino-treated nano-TiO2;

[0012] (5) Add silver-containing titanium dioxide, modified cardanol, amino-modified nano-TiO2, and polyvinyl alcohol into a stirrer and stir for 30-50 minutes to obtain an additive.

[0013] Preferably, the mass ratio of solution A to solution B in (1) is 2.1-2.6:1.

[0014] Preferably, the mass ratio of cardanol, ε-caprolactone and stannous octoate catalyst in (2) is 1:1.2-1.5:0.01-0.03.

[0015] Preferably, the mass ratio of tetrabutyl titanate, hexadecyltrimethylammonium bromide and urea in (3) is 1.1-1.3:1:0.8-1.3.

[0016] Preferably, the mass ratio of brominated nano-TiO2 and 3-aminopropylmethyldiethoxysilane in (4) is 1:1.3-1.6.

[0017] Preferably, the mass ratio of silver-containing titanium dioxide, modified cardanol, amino-modified nano-TiO2, and polyvinyl alcohol in (5) is 0.8-1.4:1:1.6-1.8:2.1-2.5.

[0018] Preferably, the preparation method of the fungal control agent for Pseudomonas mongolica comprises the following steps: adding Beauveria bassiana, matrine and adjuvants into a stirrer according to a proportion, stirring at 30-40° C. for 20-40 minutes, and obtaining the fungal control agent for Pseudomonas mongolica after the stirring.

[0019] (III) Beneficial technical effects

[0020] The invention comprises the following steps: adding Beauveria bassiana, matrine and an auxiliary agent into a stirrer, stirring the mixture, and obtaining a fungal control agent for Mongolian ground beetles. The Beauveria bassiana can infect Mongolian ground beetles adults and colonize the insect body. In the early stage of infection, the hyphae begin to grow rapidly with the help of nutrients and water in the insect body wall, germinate and invade the inside of the insect body, and decompose the insect body structure. In the late stage of infection, the hyphae invade the muscle tissue of the insect body, the insect body moves slowly, and the hyphae obtain nutrients in the insect intestinal structure to reproduce in large quantities, which makes it difficult for the insect body to obtain sufficient nutrients, causes physiological metabolic disorders and causes death. The hyphae penetrate the insect body, extend outside the insect body, and differentiate into aerial hyphae. , and then produce a large number of conidia, which are scattered on the surface of the insect body and the soil surface; the spores of Beauveria bassiana can directly parasitize host insects, and can also live a saprophytic life in a variety of environments. They can still persist in the soil in the form of conidia. When the climatic conditions, nutritional conditions and host are suitable, the target insects will germinate to form hyphae, launching a new wave of infection, and continuously controlling the Mongolian ground beetle in the soil; matrine and Beauveria bassiana have good compatibility and can cooperate with Beauveria bassiana; and silver-containing titanium dioxide, modified cardanol, and nano-TiO2 themselves have good antifungal effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a scanning electron micrograph of Beauveria bassiana.

[0022] Figure 2 This is a pot experiment of the combined application of Beauveria bassiana and matrine. DETAILED DESCRIPTION

[0023] Beauveria bassiana was received and preserved by the CGMCC on November 13, 2023, with the preservation number 40918. It was tested by the CGMCC on November 13, 2023, and the result was that it was alive.

[0024] Example 1

[0025] (1) adding 10 parts by weight of anhydrous ethanol, 8 parts by weight of distilled water, and 1 part by weight of glacial acetic acid to a reactor and stirring them uniformly, then adding 0.01 mol / L concentrated nitric acid to adjust the pH to 2, continuing to add 6 parts by weight of silver nitrate to the reactor, stirring at 20° C. for 15 minutes to obtain solution A; adding 3 parts by weight of anhydrous ethanol to a flask, adding 10 parts by weight of butyl titanate under stirring, stirring for 20 minutes to obtain solution B; slowly adding solution B dropwise to solution A, wherein the mass ratio of solution A to solution B is 2.1:1, stirring for 1 hour, aging at 20° C. for 20 hours, drying, and grinding to obtain silver-containing titanium dioxide;

[0026] (2) adding cardanol and ε-caprolactone to a reactor and stirring evenly, introducing nitrogen protection, and then adding stannous octoate catalyst, wherein the mass ratio of cardanol, ε-caprolactone, and stannous octoate catalyst is 1:1.2:0.01, reacting at 90° C. for 6 h, and after the reaction is completed, first dissolving the crude product with chloroform, and then precipitating with anhydrous ether, repeating the dissolution and precipitation twice, and vacuum drying the product to obtain modified cardanol;

[0027] (3) adding tetrabutyl titanate to distilled water, stirring and dissolving, and then adding hexadecyltrimethylammonium bromide aqueous solution and urea, wherein the mass ratio of tetrabutyl titanate, hexadecyltrimethylammonium bromide and urea is 1.1:1:0.8, pouring the solution into a reactor, reacting at 40°C for 2h, and obtaining brominated nano-TiO2;

[0028] (4) adding brominated nano-TiO2 and 3-aminopropylmethyldiethoxysilane to a mixed solvent of distilled water and ethanol, wherein the mass ratio of brominated nano-TiO2 to 3-aminopropylmethyldiethoxysilane is 1:1.3, and after ultrasonic dispersion, reacting at 30°C for 6 hours, centrifuging, and washing with ethanol and acetone in turn to obtain amino nano-TiO2;

[0029] (5) Add silver-containing titanium dioxide, modified cardanol, amino-type nano-TiO2, and polyvinyl alcohol into a stirrer, wherein the mass ratio of silver-containing titanium dioxide, modified cardanol, amino-type nano-TiO2, and polyvinyl alcohol is 0.8:1:1.6:2.1, and stir for 30 minutes to obtain an additive.

[0030] (6) 60 parts by weight of Beauveria bassiana, 1 part by weight of matrine, and 0.2 parts by weight of an adjuvant were added into a stirrer and stirred at 30° C. for 20 minutes to obtain a fungal control agent for Pseudomonas dasyphyllae.

[0031] Example 2

[0032] (1) adding 15 parts by weight of anhydrous ethanol, 12 parts by weight of distilled water, and 3 parts by weight of glacial acetic acid to a reactor and stirring them uniformly, then adding 0.03 mol / L concentrated nitric acid to adjust the pH to 3, continuing to add 12 parts by weight of silver nitrate to the reactor, stirring at 30° C. for 25 minutes to obtain solution A; adding 8 parts by weight of anhydrous ethanol to a flask, adding 16 parts by weight of butyl titanate under stirring, stirring for 30 minutes to obtain solution B; slowly adding solution B dropwise to solution A, wherein the mass ratio of solution A to solution B is 2.6:1, stirring for 2 hours, aging at 25° C. for 28 hours, drying, and grinding to obtain silver-containing titanium dioxide;

[0033] (2) adding cardanol and ε-caprolactone to a reactor and stirring evenly, introducing nitrogen protection, and then adding stannous octoate catalyst, wherein the mass ratio of cardanol, ε-caprolactone, and stannous octoate catalyst is 1:1.5:0.03, reacting at 130° C. for 12 h, and after the reaction is completed, first dissolving the crude product with chloroform, and then precipitating with anhydrous ether, repeating the dissolution and precipitation 4 times, and vacuum drying the product to obtain modified cardanol;

[0034] (3) adding tetrabutyl titanate to distilled water, stirring and dissolving, and then adding hexadecyltrimethylammonium bromide aqueous solution and urea, wherein the mass ratio of tetrabutyl titanate, hexadecyltrimethylammonium bromide and urea is 1.3:1:1.3, pouring the solution into a reactor, reacting at 70°C for 6h, to obtain brominated nano-TiO2;

[0035] (4) adding brominated nano-TiO2 and 3-aminopropylmethyldiethoxysilane to a mixed solvent of distilled water and ethanol, wherein the mass ratio of brominated nano-TiO2 to 3-aminopropylmethyldiethoxysilane is 1:1.6, and after ultrasonic dispersion, reacting at 60°C for 8h, centrifuging, and washing with ethanol and acetone in turn to obtain amino nano-TiO2;

[0036] (5) Add silver-containing titanium dioxide, modified cardanol, amino-type nano-TiO2, and polyvinyl alcohol into a stirrer, wherein the mass ratio of silver-containing titanium dioxide, modified cardanol, amino-type nano-TiO2, and polyvinyl alcohol is 1.4:1:1.8:2.5, and stir for 50 minutes to obtain an additive.

[0037] (6) 80 parts by weight of Beauveria bassiana, 3 parts by weight of matrine, and 0.4 parts by weight of an adjuvant were added into a stirrer and stirred at 40° C. for 40 minutes to obtain a fungal control agent for Pseudomonas dasyphyllae.

[0038] Example 3

[0039] (1) adding 12.5 parts by weight of anhydrous ethanol, 10 parts by weight of distilled water, and 2 parts by weight of glacial acetic acid to a reactor and stirring them uniformly, then adding 0.02 mol / L concentrated nitric acid to adjust the pH to 2.5, continuing to add 9 parts by weight of silver nitrate to the reactor, stirring at 25° C. for 20 minutes to obtain solution A; adding 5.5 parts by weight of anhydrous ethanol to a flask, adding 13 parts by weight of butyl titanate under stirring, stirring for 25 minutes to obtain solution B; slowly adding solution B dropwise to solution A, wherein the mass ratio of solution A to solution B is 2.35:1, stirring for 1.5 hours, aging at 22.5° C. for 24 hours, drying, and grinding to obtain silver-containing titanium dioxide;

[0040] (2) adding cardanol and ε-caprolactone to a reactor and stirring evenly, introducing nitrogen protection, and then adding a stannous octoate catalyst, wherein the mass ratio of cardanol, ε-caprolactone, and stannous octoate catalyst is 1:1.35:0.02, reacting at 110° C. for 9 h, and after the reaction is completed, first dissolving the crude product with chloroform, and then precipitating with anhydrous ether, repeating the dissolution and precipitation 3 times, and vacuum drying the product to obtain modified cardanol;

[0041] (3) adding tetrabutyl titanate to distilled water, stirring and dissolving, and then adding hexadecyltrimethylammonium bromide aqueous solution and urea, wherein the mass ratio of tetrabutyl titanate, hexadecyltrimethylammonium bromide and urea is 1.2:1:1.05, pouring the solution into a reactor, reacting at 55°C for 4h, to obtain brominated nano-TiO2;

[0042] (4) adding brominated nano-TiO2 and 3-aminopropylmethyldiethoxysilane to a mixed solvent of distilled water and ethanol, wherein the mass ratio of brominated nano-TiO2 to 3-aminopropylmethyldiethoxysilane is 1:1.45, and after ultrasonic dispersion, reacting at 45°C for 7h, centrifuging, and washing with ethanol and acetone in turn to obtain amino nano-TiO2;

[0043] (5) Add silver-containing titanium dioxide, modified cardanol, amino-type nano-TiO2, and polyvinyl alcohol into a stirrer, wherein the mass ratio of silver-containing titanium dioxide, modified cardanol, amino-type nano-TiO2, and polyvinyl alcohol is 1.1:1:1.7:2.3, and stir for 40 minutes to obtain an additive.

[0044] (6) 70 parts by weight of Beauveria bassiana, 2 parts by weight of matrine, and 0.3 parts by weight of an adjuvant were added into a stirrer and stirred at 35° C. for 30 minutes to obtain a fungal control agent for Pseudomonas mongolica.

[0045] Example 4

[0046] (1) adding 10 parts by weight of anhydrous ethanol, 8 parts by weight of distilled water, and 1 part by weight of glacial acetic acid to a reactor and stirring them uniformly, then adding 0.01 mol / L concentrated nitric acid to adjust the pH to 2, continuing to add 6 parts by weight of silver nitrate to the reactor, stirring at 20° C. for 15 minutes to obtain solution A; adding 3 parts by weight of anhydrous ethanol to a flask, adding 10 parts by weight of butyl titanate under stirring, stirring for 20 minutes to obtain solution B; slowly adding solution B dropwise to solution A, wherein the mass ratio of solution A to solution B is 2.1:1, stirring for 1 hour, aging at 20° C. for 20 hours, drying, and grinding to obtain silver-containing titanium dioxide;

[0047] (2) adding cardanol and ε-caprolactone to a reactor and stirring evenly, introducing nitrogen protection, and then adding stannous octoate catalyst, wherein the mass ratio of cardanol, ε-caprolactone, and stannous octoate catalyst is 1:1.2:0.01, reacting at 90° C. for 6 h, and after the reaction is completed, first dissolving the crude product with chloroform, and then precipitating with anhydrous ether, repeating the dissolution and precipitation twice, and vacuum drying the product to obtain modified cardanol;

[0048] (3) adding tetrabutyl titanate to distilled water, stirring and dissolving, and then adding hexadecyltrimethylammonium bromide aqueous solution and urea, wherein the mass ratio of tetrabutyl titanate, hexadecyltrimethylammonium bromide and urea is 1.3:1:1.3, pouring the solution into a reactor, reacting at 70°C for 6h, to obtain brominated nano-TiO2;

[0049] (4) adding brominated nano-TiO2 and 3-aminopropylmethyldiethoxysilane to a mixed solvent of distilled water and ethanol, wherein the mass ratio of brominated nano-TiO2 to 3-aminopropylmethyldiethoxysilane is 1:1.6, and after ultrasonic dispersion, reacting at 60°C for 8h, centrifuging, and washing with ethanol and acetone in turn to obtain amino nano-TiO2;

[0050] (5) Add silver-containing titanium dioxide, modified cardanol, amino-type nano-TiO2, and polyvinyl alcohol into a stirrer, wherein the mass ratio of silver-containing titanium dioxide, modified cardanol, amino-type nano-TiO2, and polyvinyl alcohol is 1.1:1:1.7:2.3, and stir for 40 minutes to obtain an additive.

[0051] (6) 70 parts by weight of Beauveria bassiana, 2 parts by weight of matrine, and 0.3 parts by weight of an adjuvant were added into a stirrer and stirred at 35° C. for 30 minutes to obtain a fungal control agent for Pseudomonas mongolica.

[0052] Example 5

[0053] (1) adding 15 parts by weight of anhydrous ethanol, 12 parts by weight of distilled water, and 3 parts by weight of glacial acetic acid to a reactor and stirring them uniformly, then adding 0.03 mol / L concentrated nitric acid to adjust the pH to 3, continuing to add 12 parts by weight of silver nitrate to the reactor, stirring at 30° C. for 25 minutes to obtain solution A; adding 8 parts by weight of anhydrous ethanol to a flask, adding 16 parts by weight of butyl titanate under stirring, stirring for 30 minutes to obtain solution B; slowly adding solution B dropwise to solution A, wherein the mass ratio of solution A to solution B is 2.6:1, stirring for 2 hours, aging at 25° C. for 28 hours, drying, and grinding to obtain silver-containing titanium dioxide;

[0054] (2) adding cardanol and ε-caprolactone to a reactor and stirring evenly, introducing nitrogen protection, and then adding stannous octoate catalyst, wherein the mass ratio of cardanol, ε-caprolactone, and stannous octoate catalyst is 1:1.5:0.03, reacting at 130° C. for 12 h, and after the reaction is completed, first dissolving the crude product with chloroform, and then precipitating with anhydrous ether, repeating the dissolution and precipitation 4 times, and vacuum drying the product to obtain modified cardanol;

[0055] (3) adding tetrabutyl titanate to distilled water, stirring and dissolving, and then adding hexadecyltrimethylammonium bromide aqueous solution and urea, wherein the mass ratio of tetrabutyl titanate, hexadecyltrimethylammonium bromide and urea is 1.2:1:1.05, pouring the solution into a reactor, reacting at 55°C for 4h, to obtain brominated nano-TiO2;

[0056] (4) adding brominated nano-TiO2 and 3-aminopropylmethyldiethoxysilane to a mixed solvent of distilled water and ethanol, wherein the mass ratio of brominated nano-TiO2 to 3-aminopropylmethyldiethoxysilane is 1:1.45, and after ultrasonic dispersion, reacting at 45°C for 7h, centrifuging, and washing with ethanol and acetone in turn to obtain amino nano-TiO2;

[0057] (5) Add silver-containing titanium dioxide, modified cardanol, amino-type nano-TiO2, and polyvinyl alcohol into a stirrer, wherein the mass ratio of silver-containing titanium dioxide, modified cardanol, amino-type nano-TiO2, and polyvinyl alcohol is 0.8:1:1.6:2.1, and stir for 30 minutes to obtain an additive.

[0058] (6) 60 parts by weight of Beauveria bassiana, 1 part by weight of matrine, and 0.2 parts by weight of an adjuvant were added into a stirrer and stirred at 30° C. for 20 minutes to obtain a fungal control agent for Pseudomonas dasyphyllae.

[0059] Comparative Example 1

[0060] Compared with Example 5, no matrine or auxiliary agent was added, and other raw material components were the same.

[0061] Comparative Example 2

[0062] Compared with Example 5, no Beauveria bassiana and no auxiliary agent were added, and other raw material components were the same.

[0063] Comparative Example 3

[0064] Compared with Example 5, Beauveria bassiana and matrine were not added, and other raw material components were the same.

[0065] The fungal control agents for Mongolian ground beetles obtained in Examples 1-5 and Comparative Example 1 were subjected to insecticidal experiments; 100 Mongolian ground beetles were taken in each group, and the fungal control agents for Mongolian ground beetles were used to test the insecticidal rate. The test results are shown in Table 1.

[0066] Table 1: Insecticidal rate test.

[0067] project Insecticide rate (%) Example 1 99 Example 2 98 Example 3 98 Example 4 99 Example 5 99 Comparative Example 1 65 Comparative Example 2 60 Comparative Example 3 42

[0068] As can be seen from Table 1, the fungal control agents for Pseudomonas mongolica of Examples 1-5 of the present invention have better insecticidal effects than those of Comparative Examples 1-3.

[0069] The mixed use of Beauveria bassiana and matrine was tested to calibrate the control effect and insect dead insect rate. The test results are shown in Table 2.

[0070] project Corrected protective effect (%) Dead insect rate (%) Example 1 76.25 76.79 Example 2 77.21 77.46 Example 3 77.26 79.31 Example 4 76.48 77.19 Example 5 76.87 79.64 Comparative Example 1 44.83 64.51 Comparative Example 2 54.02 0 Comparative Example 3 30.14 0

[0071] As shown in Table 1, the fungal control agents for Pseudomonas mongolica of Examples 1-5 of the present invention have better corrected control efficacy and dead insect rate than those of Comparative Examples 1-3.

[0072] The potted plant test of Example 5 and Comparative Examples 1-2 using Beauveria bassiana and matrine was carried out to test the effect of the combination of the above-mentioned Figure 2 .

[0073] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and describes these embodiments in detail to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is only limited by the claims and their full scope and equivalents. The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and describes these embodiments in detail to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A fungus control agent for Pseudomonas mongolica, It is characterized in that The invention comprises the following components by weight: 60-80 parts by weight of Beauveria bassiana with CGMCC preservation number 40918, 1-3 parts by weight of matrine and 0.2-0.4 parts by weight of an auxiliary agent.

2. The fungus control agent for Psoralea mongolica according to claim 1, It is characterized in that The preparation method of the auxiliary agent is: (1) adding 10-15 parts by weight of anhydrous ethanol, 8-12 parts by weight of distilled water, and 1-3 parts by weight of glacial acetic acid to a reactor and stirring them uniformly, then adding 0.01-0.03 mol / L concentrated nitric acid to adjust the pH to 2-3, continuing to add 6-12 parts by weight of silver nitrate to the reactor, stirring at 20-30° C. for 15-25 minutes to obtain solution A; adding 3-8 parts by weight of anhydrous ethanol to a flask, adding 10-16 parts by weight of butyl titanate under stirring, stirring for 20-30 minutes to obtain solution B; slowly adding solution B dropwise to solution A, stirring for 1-2 hours, aging at 20-25° C. for 20-28 hours, drying, and grinding to obtain silver-containing titanium dioxide; (2) adding cardanol and ε-caprolactone into a reactor and stirring evenly, introducing nitrogen protection, then adding stannous octoate catalyst, reacting at 90-130° C. for 6-12 hours, and after the reaction is completed, first dissolving the crude product with chloroform, and then precipitating with anhydrous ether, repeating the dissolution and precipitation 2-4 times, and vacuum drying the product to obtain modified cardanol; (3) Add tetrabutyl titanate to distilled water, stir and dissolve, then add hexadecyltrimethylammonium bromide aqueous solution and urea, pour the solution into a reactor, and react at 40-70°C for 2-6 hours to obtain brominated nano-TiO 2 ; (4) Add brominated nano-TiO to a mixed solvent of distilled water and ethanol 2 and 3-aminopropylmethyldiethoxysilane, after ultrasonic dispersion, react at 30-60°C for 6-8h, centrifuge, and wash with ethanol and acetone in turn to obtain amino-modified nano-TiO 2 ; (5) silver-containing titanium dioxide, modified cardanol, amino-modified nano-TiO 2 , add polyvinyl alcohol into the stirrer and stir for 30-50 minutes to obtain an auxiliary agent.

3. The fungus control agent for Psoralea mongolica according to claim 2, It is characterized in that The mass ratio of solution A to solution B in (1) is 2.1-2.6:

1.

4. The fungus control agent for Psoralea mongolica according to claim 2, It is characterized in that The mass ratio of cardanol, ε-caprolactone and stannous octoate catalyst in (2) is 1:1.2-1.5:0.01-0.

03.

5. The fungus control agent for Psoralea mongolica according to claim 2, It is characterized in that The mass ratio of tetrabutyl titanate, hexadecyltrimethylammonium bromide and urea in (3) is 1.1-1.3:1:0.8-1.

3.

6. The fungus control agent for Psoralea mongolica according to claim 2, It is characterized in that The brominated nano-TiO 2 The mass ratio of 3-aminopropylmethyldiethoxysilane is 1:1.3-1.

6.

7. The fungus control agent for Psoralea mongolica according to claim 2, It is characterized in that The (5) contains silver titanium dioxide, modified cardanol, amino nano-TiO 2 , and polyvinyl alcohol are in a mass ratio of 0.8-1.4:1:1.6-1.8:2.1-2.

5.

8. A method for preparing the fungus control agent for Pseudomonas mongolica according to any one of claims 1 to 7, It is characterized in that The preparation method of the fungal control agent for Pseudomonas mongoliana comprises the following steps: adding Beauveria bassiana, matrine and an auxiliary agent into a stirrer according to a proportion, stirring at 30-40° C. for 20-40 minutes, and obtaining the fungal control agent for Pseudomonas mongoliana.

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