Pesticide synergist and method for preparing the same

Abstract

The application relates to the technical field of pesticides, and particularly discloses a pesticide synergistic adjuvant and a preparation method thereof. The pesticide synergistic adjuvant is obtained by mixing an A agent and a B agent, the A agent is obtained by heating, stirring and cooling a base liquid, and the base liquid is obtained by mixing the following components in parts by weight: crude phenol, phenol oil, diesel oil, a penetrating agent, sodium hydroxide, rosin and water; the B agent comprises the following components: a viscosity regulator and bentonite; the viscosity regulator is obtained by copolymerization of monomers including acrylamide and at least one unsaturated fatty acid. With the assistance of the viscosity regulator, the bentonite particles attached to the surface of the waxy layer increase the roughness of the waxy layer, the retention amount of the pesticide synergistic adjuvant on the leaf surface is increased, and the prevention and treatment effect on crop diseases is improved.

Description

Technical Field

[0001] This application relates to the field of pesticide technology, and more specifically, to a pesticide synergist and its preparation method. Background Technology

[0002] Applying pesticides is an important means of controlling pests and diseases and increasing crop yields, and it plays a vital role in agricultural production. Currently, pesticides are mainly applied by spraying. Pesticides applied in this way will deposit on the leaf surface after natural drying, thus playing a role in preventing pests and diseases. To improve the control effect on crop diseases, pesticide synergists can also be applied in combination with pesticides.

[0003] Chinese Patent CN102805082B discloses a pesticide synergist, which comprises the following components by mass fraction: 10% crude phenol, 20% phenolic oil, 8% diesel oil, 2% penetrant, 10% sodium hydroxide, 5% rosin, and 45% water. The pesticide synergist is prepared by the following method: water is added to a reaction vessel and heated to 50-60°C. Then, crude phenol, phenolic oil, diesel oil, penetrant, sodium hydroxide, and rosin are added sequentially in proportion. The temperature is raised to 80°C, heating is stopped, and the mixture is allowed to dissolve and be stirred evenly. The mixture is then allowed to cool naturally to obtain the pesticide synergist.

[0004] Regarding the aforementioned technologies, the inventors believe that the leaf surface of crops is usually covered with a waxy layer. When pesticide synergists in the relevant technologies are sprayed onto the leaf surface of crops, the waxy layer will hinder the retention of pesticide synergists on the leaf surface, which is not conducive to fully improving the control effect on crop diseases. Summary of the Invention

[0005] After applying pesticide synergists from related technologies to the surface of crop leaves, the waxy layer on the leaf surface hinders the retention of the synergists, which is detrimental to fully improving the control effect on crop diseases. To overcome this deficiency, this application provides a pesticide synergist and its preparation method.

[0006] In the first aspect, this application provides a pesticide synergist, which adopts the following technical solution:

[0007] A pesticide synergist, comprising an agent A and an agent B, wherein agent A is obtained by heating, stirring and cooling a base liquid, the base liquid being a mixture of the following components in parts by weight: 10-12 parts crude phenol, 20-24 parts phenolic oil, 8-10 parts diesel oil, 2.0-2.4 parts penetrant, 10-14 parts sodium hydroxide, 5-7 parts rosin, and 45-55 parts water; agent B, expressed in parts as in the base liquid, comprises the following components: 4-8 parts viscosity modifier and 6-8 parts bentonite, wherein the viscosity modifier is copolymerized from monomers, the monomers including acrylamide and at least one unsaturated fatty acid.

[0008] By adopting the above technical solution, this application adjusts the formulation of pesticide synergist adjuvants, using the original pesticide synergist adjuvant as agent A, and adding agent B on this basis. Mixing agent A and agent B yields a new pesticide synergist adjuvant. When the pesticide synergist adjuvant of this application is sprayed onto the leaf surface, the viscosity modifier comes into contact with the waxy layer.

[0009] The main component of the waxy layer is long-chain fatty acids with 16-32 carbon atoms, while the monomers of viscosity modifiers include unsaturated fatty acids. After unsaturated fatty acids participate in copolymerization, the viscosity modifier molecules contain a structure similar to that of the waxy layer, thus making it easier for the viscosity modifier to adhere to the surface of the waxy layer. At the same time, the alkane molecules in diesel fuel typically have 10-22 carbon atoms, thus having a certain dissolving effect on the waxy layer of the blades, which is beneficial for the viscosity modifier to make full contact with the waxy layer.

[0010] While the viscosity modifier adheres to the surface of the waxy layer, the carboxyl groups introduced by the unsaturated fatty acids in the viscosity modifier electrostatically adsorb onto the bentonite particles. Simultaneously, the acrylamide polymer in the viscosity modifier acts as a thickener for the pesticide synergist, facilitating the adhesion of the bentonite particles to the leaf waxy layer. The bentonite particles adhering to the waxy layer increase its roughness, thereby increasing the retention of pesticide synergists on the leaf surface and contributing to a significant improvement in the control of crop diseases.

[0011] Preferably, the viscosity modifier is prepared according to the following method:

[0012] (1) Mix the monomer and deionized water and adjust the pH to 11 to obtain the reaction solution;

[0013] (2) Nitrogen gas is introduced into the reaction solution and an initiator is added. The solution is heated at 50°C for 8 hours and then cooled. After cooling, the solution is discharged, cut, dried and crushed in sequence to obtain the viscosity modifier.

[0014] By adopting the above technical solution, this application heats the product under the action of an initiator, causing monomers such as acrylamide and unsaturated fatty acids to undergo a copolymerization reaction, thereby obtaining a viscosity modifier.

[0015] Preferably, the initiator is potassium persulfate, and the amount of the initiator is 0.1-0.2% of the monomer weight.

[0016] By adopting the above technical solution, the type and amount of initiator are optimized, which helps to fully improve the conversion rate of monomers while saving initiator.

[0017] Preferably, the unsaturated fatty acid molecule contains at least four carbon-carbon double bonds.

[0018] By adopting the above technical solution, as the number of carbon-carbon double bonds in unsaturated fatty acid molecules increases, the number of branched chains in unsaturated fatty acid molecules participating in copolymerization also increases. When the unsaturated fatty acid molecule contains at least four carbon-carbon double bonds, the viscosity modifier molecule can have a relatively complex network structure, which improves the adhesion of the viscosity modifier to the surface of the wax layer and helps to increase the retention of pesticide synergists on the leaf surface.

[0019] Preferably, the unsaturated fatty acid is arachidonic acid, eicosapentaenoic acid, or docosahexaenoic acid.

[0020] By adopting the above technical solution, the types of unsaturated fatty acids were optimized. Arachidonic acid, eicosapentaenoic acid, and docosahexaenoic acid all have between 16 and 32 carbon atoms, which have good compatibility with fatty acid molecules in the waxy layer. When docosahexaenoic acid is selected, the viscosity modifier molecules have a more complex network structure (compared to the use of arachidonic acid and eicosapentaenoic acid), which is beneficial to increasing the retention of pesticide synergists on the leaf surface.

[0021] Preferably, the molar ratio of acrylamide to unsaturated fatty acid in the monomer is (8.5-10.5):1.

[0022] By adopting the above technical solution, the molar ratio of acrylamide to unsaturated fatty acids was optimized, which helps to maximize the retention of pesticide synergists on the leaf surface while conserving unsaturated fatty acids.

[0023] Preferably, the bentonite is calcium-based bentonite.

[0024] By adopting the above technical solutions, common types of bentonite include calcium-based bentonite and sodium-based bentonite. Among them, calcium-based bentonite has a larger interlayer spacing, making it easier to adsorb carboxyl groups. Moreover, the interlayer cation charge of calcium-based bentonite is greater than that of sodium-based bentonite, resulting in a stronger electrostatic adsorption force with carboxyl groups (in practice, carboxyl anions). Using calcium-based bentonite is more helpful in improving the roughness of the leaf wax layer and increasing the retention of pesticide synergists on the leaf surface.

[0025] Preferably, the monomer also includes sodium methylpropenesulfonate.

[0026] By adopting the above technical solution, compared with carboxyl groups, sulfonic acid groups have a stronger adsorption force on calcium ions. Sodium methacrylate, as a monomer, can introduce sulfonic acid groups into the viscosity modifier after participating in the polymerization. Within a certain dosage range, it can increase the electrostatic adsorption force of bentonite, which helps to increase the amount of pesticide synergist adjuvants retained on the leaf surface.

[0027] Preferably, the molar ratio of unsaturated fatty acid to sodium methacrylate sulfonate in the monomer is (4.4-4.8):1.

[0028] By adopting the above technical solution, the molar ratio of unsaturated fatty acids to sodium methyl methacrylate was optimized, which helps to increase the retention of pesticide synergists on the leaf surface.

[0029] Secondly, this application provides a method for preparing a pesticide synergist, which adopts the following technical solution.

[0030] A method for preparing a pesticide synergist includes the following steps:

[0031] (1) Mix crude phenol, phenolic oil, diesel oil, penetrant, rosin, sodium hydroxide and water to obtain the base solution; in this step, the temperature of the water is 50-60℃;

[0032] (2) Heat the base liquid to 80°C and stir. After stirring, wait for the base liquid to cool naturally to obtain Agent A.

[0033] (3) Mix any of the above viscosity modifiers with bentonite to obtain agent B. Mix agent A and agent B and stir to obtain pesticide synergist.

[0034] By adopting the above technical solution, this application first prepared agent A according to the method in the relevant technology, and then added agent B, which is a mixture of viscosity modifier and bentonite, on the basis of agent A. After stirring, a pesticide synergist was obtained.

[0035] In summary, this application has the following beneficial effects:

[0036] 1. The viscosity modifier of this application can adhere to the surface of the waxy layer and undergo electrostatic adsorption with bentonite particles, causing some of the bentonite particles to adhere to the surface of the leaf waxy layer. The bentonite particles adhering to the surface of the waxy layer increase the roughness of the waxy layer, increase the retention of pesticide synergists on the leaf surface, and help to fully improve the control effect on crop diseases.

[0037] 2. In this application, calcium-based bentonite is preferred. Calcium-based bentonite has a larger interlayer spacing than sodium-based bentonite, thus making it easier to adsorb carboxyl groups. Furthermore, the interlayer cation charge of calcium-based bentonite is also greater than that of sodium-based bentonite, resulting in stronger electrostatic adsorption to carboxyl groups and easier retention on the waxy layer surface. Using calcium-based bentonite further helps to improve the roughness of the leaf waxy layer and increase the retention of pesticide synergists on the leaf surface. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the embodiments, preparation examples and comparative examples. The raw materials involved in the present application can all be obtained commercially.

[0039] Preparation example of viscosity modifier

[0040] The following explanation uses Preparation Example 1 as an example.

[0041] Preparation Example 1

[0042] In this preparation example, the viscosity modifier was prepared according to the following method:

[0043] (1) Mix the monomer and deionized water and adjust the pH to 11 to obtain the reaction solution; in this step, the monomer concentration in the reaction solution is 25% (mass concentration); the monomer is acrylamide and unsaturated fatty acid, the unsaturated fatty acid is oleic acid, and the molar ratio of acrylamide to unsaturated fatty acid is 11.5:1.

[0044] (2) Nitrogen gas is introduced into the reaction solution using a nitrogen supply device, and potassium persulfate initiator with a weight of 0.05% of the total weight of monomers is added to the reaction solution. After heating at 50°C for 8 hours, the solution is cooled down. After cooling down, the solution is discharged, cut, dried and crushed in sequence to obtain a viscosity modifier with an average particle size of 50 μm.

[0045] As shown in Table 1, the difference between Preparation Examples 1-5 lies in the percentage of initiator amount to monomer weight (hereinafter referred to as initiator percentage).

[0046] Table 1

[0047]

[0048] Preparation Example 6

[0049] The difference between this preparation example and preparation example 5 is that the unsaturated fatty acid is arachidonic acid.

[0050] Preparation Example 7

[0051] The difference between this preparation example and preparation example 5 is that the unsaturated fatty acid is eicosapentaenoic acid.

[0052] Preparation Example 8

[0053] The difference between this preparation example and preparation example 5 is that the unsaturated fatty acid is docosahexaenoic acid.

[0054] As shown in Table 2, the difference between preparation examples 8-12 is that the molar ratio of acrylamide to unsaturated fatty acid (hereinafter referred to as AM:UFA) is different.

[0055] Table 2AM:UFA

[0056]

[0057] Preparation Example 13

[0058] The difference between this preparation example and Preparation Example 12 is that a portion of the unsaturated fatty acids in the monomer of Preparation Example 12 were replaced with sodium methacrylate. In both this preparation example and Preparation Example 12, the proportion of acrylamide in the monomer is the same, while the molar ratio of unsaturated fatty acids to sodium methacrylate in this preparation example is 5.0:1.

[0059] As shown in Table 3, the difference between Preparation Examples 13-17 is that the molar ratio of unsaturated fatty acids to sodium methyl methacrylate (hereinafter referred to as UFA:SMAS) is different.

[0060] Table 3 UFA:SMAS

[0061]

[0062] Example

[0063] Examples 1-5

[0064] The following description uses Example 1 as an example.

[0065] Example 1

[0066] In this embodiment, the pesticide synergist is prepared according to the following steps:

[0067] (1) Mix 10.0 kg crude phenol, 20 kg phenolic oil, 8 kg diesel oil, 2.0 kg penetrant, 5.0 kg rosin, 10 kg sodium hydroxide and 45.0 kg water to obtain the base solution; in this step, the temperature of the water is 50℃;

[0068] (2) Heat the base liquid to 80°C at a heating rate of 10°C / h, then stir at a rate of 200r / min for 15min. After stirring, wait for the base liquid to cool naturally to 25°C to obtain Agent A.

[0069] (3) Mix 4 kg of viscosity modifier from Preparation Example 1 with 6.0 kg of bentonite to obtain Agent B. Mix Agent A and Agent B and stir to obtain pesticide synergist.

[0070] As shown in Table 4, the main difference between Examples 1-5 lies in the different raw material ratios.

[0071] Table 4

[0072]

[0073] Examples 6-16

[0074] As shown in Table 5, the difference between Examples 6-16 and Example 5 is that the preparation methods of the viscosity modifiers are different.

[0075] Table 5 Examples of Viscosity Modifier Preparation

[0076]

[0077] Example 17

[0078] The difference between this embodiment and Embodiment 16 is that the bentonite is calcium-based bentonite.

[0079] As shown in Table 6, the difference between Examples 17-22 lies in the different preparation methods of the viscosity modifier.

[0080] Table 6 Examples of Viscosity Modifier Preparation

[0081] sample Preparation Example Example 17 Preparation Example 12 Example 18 Preparation Example 13 Example 19 Preparation Example 14 Example 20 Preparation Example 15 Example 21 Preparation Example 16 Example 22 Preparation Example 17

[0082] Comparative Example

[0083] Comparative Example 1

[0084] This comparative example provides a pesticide synergist prepared according to Example 1 of Chinese Patent No. CN102805082B.

[0085] Comparative Example 2

[0086] The difference between this comparative example and Example 1 is that it does not include bentonite.

[0087] Comparative Example 3

[0088] The difference between this comparative example and Example 1 is that it does not include a viscosity modifier.

[0089] Performance testing methods

[0090] I. Detection of drug retention

[0091] Samples tested: pesticide synergists of Examples 1-22 and Comparative Examples 1-3.

[0092] Experimental plants: Commercially available fruit-type cucumber variety "Biyu No. 3" was used and planted in a glass greenhouse for 45 days before use.

[0093] Test method:

[0094] (1) Remove the whole cucumber leaf with the petiole, weigh the initial weight of the leaf, and use a leaf area meter to measure the area of ​​the leaf. After recording, clamp the petiole on the stage for later use. When setting up, set up 30 leaves for each of the 25 groups of test samples in Examples 1-22 and Comparative Example 3.

[0095] (2) Load the pesticide synergist into the pesticide spraying equipment, set the nozzle height to 0.55m, the spray flow rate to 800mL / min, and apply the pesticide to the leaves on the platform under the conditions of no natural wind, indoor sealing, temperature 25℃, relative humidity 75%, and atmospheric pressure 101.32kPa. Stop applying the pesticide after 5 minutes, wait for the leaf edge to stop dripping pesticide, remove the leaf, and check the leaf weight again.

[0096] Data processing:

[0097] The difference between the leaf weights measured before and after the two measurements was calculated and recorded as the pesticide residue retention. Then, the ratio A of pesticide residue retention to leaf area was calculated, and the average value of the ratio A calculated for 30 leaves of one sample was recorded as the average residue retention. Then, the ratio B between the average residue retention of the 25 tested samples (Examples 1-22 and Comparative Example 3) and the average residue retention of Comparative Example 1 was calculated and recorded as the relative residue retention. The results are shown in Table 7.

[0098] Table 7 Relative Retention

[0099] sample Relative retention / % sample Relative retention / % Example 1 132.4 Example 14 149.4 Example 2 134.7 Example 15 149.7 Example 3 136.2 Example 16 149.8 Example 4 137.6 Example 17 163.5 Example 5 139.1 Example 18 167.2 Example 6 139.2 Example 19 169.4 Example 7 139.1 Example 20 169.8 Example 8 139.3 Example 21 169.1 Example 9 139.2 Example 22 168.5 Example 10 143.6 Comparative Example 1 100.0 Example 11 146.1 Comparative Example 2 106.4 Example 12 147.8 Comparative Example 3 104.5. Example 13 148.9 / /

[0100] II. Monomer Conversion Rate Detection

[0101] Test solution collection:

[0102] In step (1) of preparing the viscosity modifier, the reaction solution was collected and labeled as test solution A. In step (2) of preparing the viscosity modifier, the reaction solution was collected after heating at 50°C for 8 hours and labeled as test solution B.

[0103] Detection method:

[0104] Referring to GB 12005.3-1989, "Determination of Residual Acrylamide Content in Polyacrylamide - Bromination Method", the double bond content in test solution A was detected and recorded as w(initial double bond), and the double bond content in test solution B was detected and recorded as w(residual double bond). Then, the monomer conversion rate was calculated according to the following formula. The results are shown in Table 8:

[0105]

[0106] Table 8 Monomer Conversion Rate

[0107] sample Monomer conversion rate / % Preparation Example 1 93.4 Preparation Example 2 95.7 Preparation Example 3 97.6 Preparation Example 4 98.3 Preparation Example 5 98.5

[0108] Based on Examples 1-5 and Comparative Example 1, and in conjunction with Table 7, it can be seen that the relative retention amount measured in Examples 1-5 is greater than that in Comparative Example 1. This indicates that the addition of viscosity modifier and bentonite increases the retention amount of pesticide synergists on the surface of crop leaves, which helps to fully improve the control effect on crop diseases.

[0109] Based on Example 1 and Comparative Examples 2-3, and in conjunction with Table 7, it can be seen that when the pesticide synergist lacks a viscosity modifier or bentonite, the retention effect of the pesticide synergist on the leaf surface is limited. This indicates that the viscosity modifier and bentonite in Example 1 have a synergistic effect, which increases the retention amount of the pesticide synergist on the crop leaf surface and helps to improve the control effect on crop diseases.

[0110] Combining Examples 5 and 6-9 with Table 7, it can be seen that the data measured in Examples 5-9 are similar, indicating that within the range of Preparation Examples 1-5, changing the initiator dosage has a limited impact on the retention of pesticide synergists on crop leaf surfaces. However, combining Preparation Examples 1-5 with Table 8, it can be seen that as the initiator dosage increases, the monomer conversion rate gradually increases, but the rate of increase gradually decreases. Preparation Example 1 corresponds to a lower monomer conversion rate, while Preparation Example 5, although having a higher conversion rate, is not significantly different from Preparation Example 4, even though the initiator dosage in Preparation Example 5 is significantly higher than that in Preparation Example 4. Therefore, when the initiator dosage is 0.1-0.2% of the monomer weight, it helps to maximize the monomer conversion rate without wasting initiator. If cost is not a factor, Preparation Example 5 should be preferred.

[0111] As can be seen from Examples 9-12 and Table 7, the retention amount of pesticide synergists on the surface of crop leaves gradually increases with the elongation of the carbon chain of unsaturated fatty acid molecules and the increase in the number of double bonds in the molecules. Example 12 showed the highest retention amount, indicating that the viscosity modifier molecules used in Example 12 have a more complex network structure, thereby improving the adhesion of the viscosity modifier to the waxy layer surface and increasing the retention amount of pesticide synergists on the leaf surface.

[0112] As can be seen from Examples 12-16 and Table 7, as the proportion of unsaturated fatty acids in the monomer increases, the retention amount of pesticide synergists on the leaf surface also increases, but the rate of increase gradually decreases. The retention amounts measured in Examples 16 and 15 are quite similar. Therefore, when the molar ratio of acrylamide to unsaturated fatty acids is (8.5-10.5):1, it helps to maximize the retention amount of pesticide synergists on the leaf surface while conserving unsaturated fatty acids. If material conservation is not considered, Example 16 should be preferred.

[0113] Combining Examples 16 and 17 with Table 7, it can be seen that the relative retention rate measured in Example 17 is much greater than that in Example 16, indicating that the interlayer spacing of calcium-based bentonite is larger, thus making it easier to adsorb with carboxyl groups. Furthermore, the interlayer cation charge of calcium-based bentonite is greater than that of sodium-based bentonite, resulting in stronger electrostatic adsorption with carboxyl groups. Therefore, using calcium-based bentonite is more helpful in improving the roughness of the leaf wax layer and increasing the retention of pesticide synergists on the leaf surface.

[0114] Combining Examples 17, 18-22 and Table 7, it can be seen that the retention amounts measured in Examples 18-22 are all greater than those in Example 17. This indicates that sodium methacrylate, as a monomer, can introduce sulfonic acid groups into the viscosity modifier after participating in polymerization, thereby helping to improve the electrostatic adsorption force of bentonite, helping to increase the roughness of the leaf wax layer, and increasing the retention amount of pesticide synergists on the leaf surface.

[0115] Based on Examples 18-22 and Table 7, it can be seen that the relative retention first increases and then decreases with the increase of sodium methacrylate dosage. The results in Example 20 are better. Overall, when the molar ratio of unsaturated fatty acids to sodium methacrylate is (4.4-4.8):1, it helps to increase the retention of pesticide synergists on the leaf surface. Based on the above, it can be inferred that the introduction of sulfonic acid groups helps calcium-based bentonite adhere to the waxy layer surface. However, sodium methacrylate can only form linear polymers. With the increase of sodium methacrylate dosage, the complexity of the network structure of the viscosity modifier molecules decreases, leading to a decrease in the measured relative retention when the dosage of sodium methacrylate is excessive.

[0116] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A pesticide synergist, characterized in that, The pesticide synergist is composed of a mixture of agent A and agent B. Agent A is obtained by heating, stirring, and cooling a base liquid, which is composed of the following components in parts by weight: 10-12 parts crude phenol, 20-24 parts phenolic oil, 8-10 parts diesel oil, 2.0-2.4 parts penetrant, 10-14 parts sodium hydroxide, 5-7 parts rosin, and 45-55 parts water. Agent B, expressed in the same parts as the base liquid, includes the following components: 4-8 parts viscosity modifier and 6-8 parts bentonite. The viscosity modifier is copolymerized from monomers, including acrylamide and at least one unsaturated fatty acid. The unsaturated fatty acid molecule contains at least four carbon-carbon double bonds, and the unsaturated fatty acid is selected from arachidonic acid, eicosapentaenoic acid, or docosahexaenoic acid. The bentonite is selected from calcium-based bentonite. The viscosity modifier is prepared according to the following method: (1) Mix the monomer and deionized water and adjust the pH to 11 to obtain a reaction solution; in the monomer, the molar ratio of acrylamide to unsaturated fatty acid is (8.5-10.5):1; the monomer also includes sodium methallyl sulfonate, in which the molar ratio of unsaturated fatty acid to sodium methallyl sulfonate is (4.4-4.8):

1. (2) Nitrogen gas is introduced into the reaction solution and an initiator is added. The solution is heated at 50°C for 8 hours and then cooled. After cooling, the solution is discharged, cut, dried and crushed in sequence to obtain a viscosity modifier. The initiator is potassium persulfate and the amount of the initiator is 0.1-0.2% of the monomer weight.

2. A method for preparing a pesticide synergist as described in claim 1, characterized in that, Includes the following steps: (1) Mix crude phenol, phenolic oil, diesel oil, penetrant, rosin, sodium hydroxide and water to obtain the base solution; in this step, the temperature of the water is 50-60℃; (2) Heat the base liquid to 80°C and stir. After stirring, wait for the base liquid to cool naturally to obtain Agent A; (3) Mix the viscosity modifier and bentonite to obtain agent B. Mix agent A and agent B and stir to obtain pesticide synergist.

Images