A seed treatment suspension containing thiabendazole, tebuconazole and imazalil and preparation method thereof

Abstract

The present application relates to the field of seed treatment technology, and specifically discloses a seed treatment suspension containing thiabendazole, tebuconazole and imazalil and a preparation method thereof. A seed treatment suspension containing thiabendazole, tebuconazole and imazalil, including the following raw materials by mass percentage: thiabendazole 6±0.6%, tebuconazole 6±0.6%, imazalil 4±0.4%, dispersant 0.35‑1.5%, ethylene glycol 7‑18%, thickener 0.08‑0.14%, preservative 0.35‑0.6%, silicone 0.035‑0.06%, dye 10‑30%, epoxy soybean oil 5‑15%, adjuvant 0‑2%, and the remainder is deionized water. The seed treatment suspension obtained in the present application has excellent wheat loose smut control effect, and has less negative impact on the germination process of wheat seeds.

Description

Technical Field

[0001] The present application relates to the technical field of seed treatment, and more specifically, to a seed treatment suspension containing thiabendazole, tebuconazole and imazalil and a preparation method thereof. Background Art

[0002] Seed treatment refers to the treatment of seeds with chemical agents before sowing, which can kill or inhibit pathogens attached to the outside of the seeds and pathogens lurking inside the seeds, protect seeds and young shoots from pests and pathogens in the soil, and the agents absorbed by the seeds can be transmitted to the above-ground parts of the plants, protecting the above-ground parts from certain pests and pathogens.

[0003] Wheat loose smut is one of the main diseases of wheat fields. It is a fungal disease caused by the Basidiomycetes. The incidence and area of ​​the disease have been increasing year by year in recent years, which is very harmful to agricultural production. Chemical treatment of wheat seeds before sowing can effectively control wheat loose smut, but the control effect depends to a large extent on the comprehensive bactericidal effect of chemical agents; at the same time, chemical agents may also have certain toxicity to wheat seeds, which can easily lead to the undesirable phenomenon of decreased germination rate of wheat seeds.

[0004] Therefore, it is necessary to develop a seed treatment suspension concentrate that has excellent effect in preventing and controlling wheat loose smut and has less negative impact on the germination rate of wheat seeds. Summary of the invention

[0005] In order to develop a seed treatment suspension that has excellent effect in preventing and controlling wheat loose smut and has less negative impact on wheat seed germination rate, the present application provides a seed treatment suspension containing thiabendazole, tebuconazole and imazalil and a preparation method thereof.

[0006] In a first aspect, the present application provides a seed treatment suspension containing thiabendazole, tebuconazole and imazalil, using the following technical solution:

[0007] A seed treatment suspension containing thiabendazole, tebuconazole and imazalil, the seed treatment suspension comprising the following raw materials in percentage by mass:

[0008] Thiabendazole 6±0.6%, tebuconazole 6±0.6%, imazalil 4±0.4%, dispersant 0.35-1.5%, ethylene glycol 7-18%, thickener 0.08-0.14%, preservative 0.35-0.6%, silicone 0.035-0.06%, dye 10-30%, epoxidized soybean oil 5-15%, auxiliary agent 0-2%, and the balance is deionized water.

[0009] In the above scheme, thiabendazole, tebuconazole and imazalil are used as fungicidal active ingredients, and the addition amount of the three is controlled according to the above mass percentage. After the three are compounded, a fungicidal effect of 1+1>2 can be achieved, and the prevention and control effect of wheat loose smut is excellent, with the comprehensive advantages of protection, treatment and systemic absorption. The average prevention effect in actual use can reach more than 98%. In addition, the seed treatment suspension has low toxicity to wheat seeds, and the germination rate of wheat seeds after treatment can reach more than 90%, with excellent comprehensive treatment effect.

[0010] In addition, under the cooperation of the adjuvants used in the above scheme, the seed treatment suspension has good comprehensive performance and high practical value.

[0011] In a specific embodiment, the seed treatment suspension comprises the following raw materials in percentage by mass: 6±0.6% of thiabendazole, 6±0.6% of tebuconazole, 4±0.4% of imazalil, 0.7-1% of dispersant, 12-15% of ethylene glycol, 0.1-0.12% of thickener, 0.4-0.5% of preservative, 0.04-0.05% of silicone, 18-24% of dye, 9-13% of epoxidized soybean oil, 0.5-1.5% of adjuvant, and the balance is deionized water.

[0012] By adopting the above technical solution, the mass percentage of each raw material of the seed treatment suspension is further optimized, and the comprehensive performance of the obtained seed treatment suspension is better.

[0013] In a specific embodiment, the seed treatment suspension comprises the following raw materials in percentage by mass: 6% thiabendazole, 6% tebuconazole, 4% imazalil, 1% dispersant, 13% ethylene glycol, 0.1% thickener, 0.5% preservative, 0.05% silicone, 21% dye, 12% epoxidized soybean oil, 1.5% adjuvant, and the balance is deionized water.

[0014] By adopting the above technical solution, the mass percentage of each raw material of the seed treatment suspension is further optimized, and the comprehensive performance of the obtained seed treatment suspension is better.

[0015] In a specific embodiment, the dispersant includes at least one of lignin sulfonate, naphthalene sulfonate, fatty alcohol polyoxyethylene ether, and sodium dialkyl sulfonyl succinate.

[0016] In a specific embodiment, the thickener includes at least one of sodium carboxymethyl cellulose, xanthan gum, bentonite, silicon dioxide and magnesium aluminum silicate.

[0017] In a specific embodiment, the preservative includes at least one of sodium benzoate, p-hydroxybenzoic acid, salicylic acid, sorbic acid and kasone.

[0018] In a specific embodiment, the dye includes at least one of Fast Brilliant Red BBC, Fast Red BBS, 3132 Red Powder and Permanent Red F4R.

[0019] In a specific embodiment, the auxiliary agent is magnesium peroxide modified with polyacrylamide and ethyl cellulose in sequence, and has a particle size of 5-10 μm.

[0020] Further, an auxiliary agent is added to the seed treatment suspension system, that is, magnesium peroxide modified by polyacrylamide and ethyl cellulose in sequence, and the magnesium peroxide has a polyacrylamide layer and an ethyl cellulose layer from the inside to the outside. Since the ethyl cellulose layer has the characteristics of being hydrophilic and insoluble in water, the magnesium peroxide modified by polyacrylamide and ethyl cellulose in sequence can be stably and evenly dispersed in the system, so that the magnesium peroxide can be relatively stably and evenly present in the coating during the seed coating process. At the same time, due to the barrier effect of the ethyl cellulose layer on water, the degree of reaction between the magnesium peroxide and the water in the system is low.

[0021] In addition, the polyacrylamide layer between the magnesium peroxide body and the ethyl cellulose layer has strong moisture absorption and water retention. After sowing, the ethyl cellulose layer is easily decomposed by the natural environment; the polyacrylamide layer absorbs water and swells, and the swollen polyacrylamide layer further accelerates the removal of the ethyl cellulose layer. Under the influence of the polyacrylamide layer absorbing water and swelling, the magnesium peroxide in the coating reacts with water to produce magnesium hydroxide and oxygen, among which the magnesium hydroxide can act as a fertilizer and the oxygen can promote seed germination; at the same time, polyacrylamide can play a role in retaining water and fertilizer, thereby comprehensively promoting the germination and growth of wheat seeds, and the practical effect is good.

[0022] In the process of seed coating wheat seeds with seed treatment suspension, after the wheat seeds are sown, magnesium peroxide reacts with water to produce magnesium hydroxide and oxygen.

[0023] In a specific embodiment, the preparation method of the auxiliary agent comprises the following steps:

[0024] (1) dissolving polyacrylamide in ethylene glycol to prepare a polyacrylamide solution with a mass concentration of 20-30 wt %; dissolving ethyl cellulose in ethanol to prepare an ethyl cellulose solution with a mass concentration of 10-15 wt %;

[0025] (2) First, magnesium peroxide is added to a polyacrylamide solution and stirred for 1-3 hours. The filtered residue is dried and crushed to obtain magnesium peroxide modified with polyacrylamide; then, the polyacrylamide-modified magnesium peroxide is added to an ethyl cellulose solution and stirred for 2-5 hours. The filtered residue is dried and crushed to obtain magnesium peroxide modified with polyacrylamide and ethyl cellulose in sequence.

[0026] In a second aspect, the present application provides a method for preparing a seed treatment suspension containing thiabendazole, tebuconazole and imazalil, using the following technical scheme:

[0027] A method for preparing a seed treatment suspension containing thiabendazole, tebuconazole and imazalil, the preparation method comprising the following steps: mixing: mixing thiabendazole, tebuconazole, imazalil, a dispersant, ethylene glycol, a thickener, a preservative, silicone, a dye, epoxy soybean oil, an adjuvant and deionized water, and fully dispersing to obtain a mother solution;

[0028] Coarse grinding: coarsely grind the mother liquor to obtain a coarse grinding liquid with a particle size of 8-10 μm;

[0029] Fine grinding: The coarse grinding liquid is finely ground to obtain a semi-finished product with a particle size of 4-5μm. After the semi-finished product is settled, the finished seed treatment suspension is obtained.

[0030] In summary, this application has the following beneficial effects:

[0031] 1. This application uses thiabendazole, tebuconazole and imazalil as fungicidal active ingredients. After the three are compounded in the prescribed amount, they can achieve a fungicidal effect of 1+1>2. It has excellent control effects on wheat loose smut and has the comprehensive advantages of protection, treatment and systemic absorption.

[0032] 2. In the seed treatment suspension formulation provided in this application, through the mutual cooperation of various auxiliary agents, the obtained seed treatment suspension has better comprehensive performance and better actual use effect.

[0033] 3. The present application further uses magnesium peroxide modified with polyacrylamide and ethyl cellulose in sequence as an auxiliary agent. The outer side of the magnesium peroxide body has a polyacrylamide layer and an ethyl cellulose layer in sequence. Since the ethyl cellulose layer has good hydrophilic and water-insoluble properties, and the polyacrylamide layer has good moisture absorption and water retention, the magnesium peroxide body can be more stably dispersed in the suspension system, and the magnesium peroxide body reacts with water after sowing wheat seeds to produce magnesium hydroxide and water, which can effectively improve the germination growth of the treated wheat seeds after sowing. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with examples and comparative examples. The raw materials involved in the present application can all be obtained commercially.

[0035] Example 1

[0036] A seed treatment suspension containing thiabendazole, tebuconazole and imazalil, comprising the following raw materials of the following qualities:

[0037] Thiabendazole 6kg, tebuconazole 6kg, imazalil 4kg, dispersant 1kg, ethylene glycol 13kg, thickener 0.1kg, preservative 0.5kg, silicone 0.05kg, dye 21kg, epoxidized soybean oil 12kg, deionized water 36.35kg;

[0038] The specific selection of raw materials used in this embodiment is as follows: the dispersant is fatty alcohol polyoxyethylene ether, CAS: 52292-17-8; the thickener is composed of xanthan gum and magnesium aluminum silicate in a mass ratio of 1:2.3; the preservative is Kathon; the silicone is ethoxy-modified polytrisiloxane; the dye is light-fast red BBS; and the epoxy soybean oil CAS: 8013-07-8.

[0039] The preparation method of the above-mentioned seed treatment suspension comprises the following steps:

[0040] S1 Mixing: Turn on the disperser, and add deionized water, dispersant, ethylene glycol, thickener, preservative, silicone, dye, epoxy soybean oil, thiabendazole, tebuconazole and imazalil into the preparation tank in sequence, stirring while adding, and controlling the stirring speed at 300 rpm. After the feeding is completed, continue stirring for 15 minutes, put the mixed solution into the mother liquor metering tank, adjust the speed of the high-speed disperser to 900 rpm, and run for 20 minutes to obtain the mother liquor;

[0041] S2 coarse grinding: After high-speed dispersion, move the mother liquid metering tank to the coarse grinding sand mill, connect the pipeline, open the cooling water system and compressed air valve, start the sand mill feed pump, connect the discharge port to the primary grinding mother liquid tank, and when material comes out of the discharge port, start the sand mill, control the feed amount of the feed pump, and control the particle size at 8-10μm to obtain coarse grinding liquid;

[0042] S3 fine grinding: connect the primary grinding mother liquor tank to the fine grinding sand mill, connect the pipeline, open the cooling water system and the compressed air valve, start the sand mill feed pump, connect the discharge port to the semi-finished product receiving tank, and when material comes out of the discharge port, start the sand mill, control the feed amount of the feed pump, and control the particle size of the semi-finished product to 4-5μm; after the fine grinding is completed, pump the semi-finished product into the sedimentation tank for sedimentation, and quantitatively fill it after sampling and analysis to obtain the finished seed treatment suspension.

[0043] The difference between Example 2-5 and Example 1 is that the ratios of the raw materials are different, as shown in the following table.

[0044] Table 1 Raw material ratio table

[0045]

[0046]

[0047] Example 6

[0048] The difference between this embodiment and embodiment 1 is that the raw materials of the seed treatment suspension further include 1.5 kg of auxiliary agent and 34.85 kg of deionized water; in the S1 mixing step, the auxiliary agent is fed together with the organosilicon; the auxiliary agent is magnesium peroxide modified with polyacrylamide and ethyl cellulose in sequence, and the particle size is 5-10 μm;

[0049] The preparation method of the adjuvant comprises the following steps:

[0050] (1) dissolving polyacrylamide with a solid content of ≥90% and a molecular weight of 2-6 million in ethylene glycol to prepare a polyacrylamide solution with a mass concentration of 25 wt%; dissolving ethyl cellulose (specification: 20 cps, average particle size 0.2 μm, ethoxy content 48%) in ethanol to prepare an ethyl cellulose solution with a mass concentration of 15 wt%;

[0051] (2) First, magnesium peroxide with a particle size of 1-5 μm is added to a polyacrylamide solution, and stirred at a speed of 700 rpm for 2.5 hours. The filtered residue is dried and crushed to obtain magnesium peroxide modified with polyacrylamide; then, the polyacrylamide-modified magnesium peroxide is added to an ethyl cellulose solution, and stirred at a speed of 500 rpm for 3 hours. The filtered residue is dried and crushed to obtain magnesium peroxide modified with polyacrylamide and ethyl cellulose in sequence.

[0052] Example 7

[0053] The difference between this embodiment and embodiment 6 is that the auxiliary agent is magnesium peroxide modified with polyacrylamide, and the preparation method of the auxiliary agent is as follows:

[0054] (1) dissolving polyacrylamide with a solid content of ≥90% and a molecular weight of 2-6 million in ethylene glycol to prepare a polyacrylamide solution with a mass concentration of 25 wt%;

[0055] (2) adding magnesium peroxide with a particle size of 1-5 μm into the polyacrylamide solution, stirring at a speed of 700 rpm for 2.5 hours, and drying and crushing the filtered residue to obtain magnesium peroxide modified with polyacrylamide.

[0056] Example 8

[0057] The difference between this embodiment and embodiment 6 is that the auxiliary agent is magnesium peroxide modified with ethyl cellulose, and the preparation method of the auxiliary agent is as follows:

[0058] (1) dissolving ethyl cellulose (specification: 20 cps, average particle size 0.2 μm, ethoxy content 48%) in ethanol to prepare an ethyl cellulose solution with a mass concentration of 15 wt %;

[0059] (2) adding magnesium peroxide with a particle size of 1-5 μm into the ethyl cellulose solution, stirring at 500 rpm for 3 h, and drying and crushing the filtered residue to obtain magnesium peroxide modified with ethyl cellulose.

[0060] Example 9

[0061] The difference between this embodiment and embodiment 1 is that the raw materials of the seed treatment suspension further include 1.5 kg of auxiliary agent and 34.85 kg of deionized water; the auxiliary agent is magnesium peroxide with a particle size of 5-10 μm.

[0062] Comparative Example 1

[0063] The difference between this comparative example and Example 1 is that no thiabendazole is added, the addition amount of tebuconazole is 9.6 kg, and the addition amount of imazalil is 6.4 kg.

[0064] Comparative Example 2

[0065] The difference between this comparative example and Example 1 is that tebuconazole is not added, the addition amount of thiabendazole is 9.6 kg, and the addition amount of imazalil is 6.4 kg.

[0066] Comparative Example 3

[0067] The difference between this comparative example and Example 1 is that imazalil is not added, the addition amount of thiabendazole is 8 kg, and the addition amount of tebuconazole is 8 kg.

[0068] Comparative Example 4

[0069] The difference between this comparative example and Example 1 is that thiabendazole and tebuconazole are not added, and the amount of imazalil added is 16 kg.

[0070] Comparative Example 5

[0071] The difference between this comparative example and Example 1 is that no thiabendazole and imazalil are added, and the amount of tebuconazole added is 16 kg.

[0072] Comparative Example 6

[0073] The difference between this comparative example and Example 1 is that tebuconazole and imazalil are not added, and the amount of thiabendazole added is 16 kg.

[0074] Comparative Example 7

[0075] The difference between this comparative example and Example 1 is that the amount of thiabendazole added is 10 kg, the amount of tebuconazole added is 4 kg, and the amount of imazalil added is 2 kg.

[0076] Comparative Example 8

[0077] The difference between this comparative example and Example 1 is that the amount of thiabendazole added is 4 kg, the amount of tebuconazole added is 10 kg, and the amount of imazalil added is 2 kg.

[0078] Comparative Example 9

[0079] The difference between this comparative example and Example 1 is that the amount of thiabendazole added is 2 kg, the amount of tebuconazole added is 4 kg, and the amount of imazalil added is 10 kg.

[0080] Comparative Example 10

[0081] The difference between this comparative example and Example 1 is that the amount of thiabendazole added is 4 kg, the amount of tebuconazole added is 2 kg, and the amount of imazalil added is 10 kg.

[0082] Performance testing methods

[0083] 1. Experiment on prevention and control of wheat loose smut

[0084] Control group: Mix 100kg of wheat seeds (Zhongmai 895) with 2L of water, place the wheat seeds in a ventilated place after thorough stirring, dry in the shade and sow in small plots. The sowing amount in each plot is 500g. The weather was clear on the day of sowing, with a temperature of 10.6-17.2℃. The precipitation during the experiment was 165.8mm, and there was no severe weather factor.

[0085] Test group: The seed treatment suspension obtained in Examples 1-9 and Comparative Examples 1-10 was used as a medicament sample, 40 ml of the medicament sample was added to 2 L of water, mixed thoroughly to form a slurry, and the slurry was poured into 100 kg of wheat seeds (Zhongmai 895). After being fully stirred, the wheat seeds were placed in a ventilated place, dried in the shade, and sown in plots. The sowing amount of each plot was 500 g. The weather was clear on the sowing day, the temperature was 10.6-17.2°C, the precipitation during the test was 165.8 mm, and there was no severe weather factor weather.

[0086] Survey method: Each plot adopts the diagonal five-point sampling method, and each point is surveyed 0.5m 2 , investigate the total number of ears and the number of diseased ears respectively, and calculate the diseased ear rate.

[0087] A total of two surveys were conducted during the experiment. The first survey was conducted one month after sowing, when the wheat was in the three-leaf stage, to investigate the emergence and growth of seedlings; the second survey was conducted three months after sowing, when the wheat was in the mature stage, to investigate the diseased ear rate.

[0088] The protective effect is calculated according to the following formula:

[0089] Diseased ear rate (%) = number of diseased ears / total number of investigated ears × 100;

[0090] Prevention effect (%) = (disease-caused ear rate in control area - disease-caused ear rate in treated area) / disease-caused ear rate in control area × 100.

[0091] Table 2 Table of efficacy test data

[0092]

[0093]

[0094] It can be seen from the control effect test data in Table 2 that after the seed treatment suspension in Examples 1-9 of the present application is used to treat wheat seeds, the control effect on wheat loose smut can reach more than 98%, and the practical effect is good.

[0095] Specifically, in combination with the test results of Example 1 and Comparative Examples 1-3, no thiabendazole, tebuconazole and imazalil were added to Comparative Examples 1-3, and the remaining two active ingredients were used to supplement the ratio of the three in Example 1, that is, the total amount of the fungicidal active ingredients was consistent with that in Example 1, and the ratio between the active ingredients was also consistent with that in Example 1. The test found that the control effect of wheat loose smut in Comparative Examples 1-3 was 83.4%, 82.7%, and 85.6%, respectively, which was significantly reduced compared with Example 1, with a decrease of about 15%. Analysis shows that due to the presence of a composite synergistic effect between thiabendazole, tebuconazole and imazalil, although the total amount of the fungicidal active ingredients in Comparative Examples 1-3 did not change, in the absence of one of the active ingredients, the composite synergistic effect between the active ingredients was broken, resulting in a significant decrease in the control effect of wheat loose smut.

[0096] Specifically, in combination with the test results of Example 1 and Comparative Examples 4-6, only imazalil, tebuconazole, and thiabendazole were added to Comparative Examples 4-6, and the dosage of the active ingredients was consistent with that of Example 1; however, the test found that the control effects of Comparative Examples 4-6 were only 73.3%, 71.5%, and 73.0%, which was more than 26% lower than that of Example 1. The analysis is the same as above, there is a more obvious compound synergistic effect between the active ingredients, and a single active ingredient completely lacks the synergistic effect between the active ingredients, so the control effect decreases more.

[0097] Specifically, in combination with the test results of Example 1 and Comparative Examples 7-10, the amount of active ingredients added and the ratio between the active ingredients in Comparative Examples 7-10 are different from those in Example 1, but the total amount of active ingredients remains unchanged. The test found that the protective effects in Comparative Examples 7-10 were 91.5%, 92.2%, 91.3%, and 90.8%, respectively, which was about 8% lower than that in Example 1. Analysis shows that there is a composite synergistic effect between imazalil, tebuconazole, and thiabendazole, and the degree of composite synergistic effect is closely related to the ratio between the three.

[0098] 2. Wheat seed germination test control group: Mix 100 kg of wheat seeds (Zhongmai 895) with 2L of water, stir thoroughly and place the wheat seeds in a ventilated place. After drying in the shade, use the soil determination method to test the germination rate.

[0099] Test group: The seed treatment suspension obtained in Examples 1-9 and Comparative Examples 1-10 was used as a sample of the agent. 40 ml of the sample of the agent was added to 2 L of water and mixed thoroughly to form a slurry. The slurry was poured into 100 kg of wheat seeds (Zhongmai 895). After being fully stirred, the wheat seeds were placed in a ventilated place. After being dried in the shade, the germination rate was tested by the soil determination method.

[0100] Soil testing method: Take two portions of wheat seeds, 100 seeds in each portion, and select fertile, loose, and well-water-retaining soil; turn the soil and level 30 square centimeters, make two furrows, sow the two portions of wheat seeds into the furrows respectively, and cover them with soil; dig out the wheat seeds after 7 days, count the number of germinated wheat seeds, and calculate the germination rate.

[0101] Table 3 Germination test data table

[0102]

[0103]

[0104] It can be seen from the germination test data in Table 3 that in the control group, the wheat seeds were treated with clean water, and the germination rate of the wheat seeds was 95%; after the seed treatment suspension in the present application was used to treat the wheat seeds, the wheat seeds could still maintain a germination rate of more than 90%, that is, it can be seen that the seed treatment suspension in the present application has little negative impact on the germination of wheat seeds.

[0105] In addition, after the wheat seeds were treated with the seed treatment suspension in Example 6, the germination rate of the wheat seeds was 99%, which was higher than that of the control group. Analysis showed that in Example 6, magnesium peroxide modified with polyacrylamide and ethyl cellulose in sequence was used as an adjuvant, and the adjuvant had a promoting effect on the germination of wheat seeds, which, to a certain extent, exceeded the inhibitory effect of other substances in the system on the germination of wheat seeds. Therefore, the test results of Example 6 showed a higher situation than that of the control group.

[0106] At the same time, combined with the test results of Examples 6-9, the germination rates of wheat seeds in Examples 7-9 are all lower than those in Example 6. Analysis shows that the magnesium peroxide body in Example 7 lacks an ethyl cellulose layer, and after it is added to the suspending agent system, the polyacrylamide layer directly absorbs water and swells or even dissolves, which causes the magnesium peroxide to gradually react with water, that is, the magnesium peroxide body has basically reacted before the application of the drug; resulting in a lower positive effect in the germination stage of wheat seeds, but there may still be a situation where the reaction product magnesium hydroxide is used as a fertilizer to promote the germination of wheat seeds.

[0107] In Example 8, the germination rate of wheat seeds was the same as that of the control group, that is, the germination-promoting effect of the adjuvant and the germination-inhibiting effect of the suspending agent system on wheat seeds offset each other. Analysis shows that the magnesium peroxide body in Example 8 lacks a polyacrylamide layer, although the stability of the magnesium peroxide body is guaranteed before application. However, after application, due to the lack of the subsequent moisture absorption and water retention effect of polyacrylamide, the reaction process of the magnesium peroxide body with water is slow, thereby affecting the degree of effect of the magnesium peroxide body releasing oxygen to promote the germination of wheat seeds after the reaction.

[0108] In Example 9, the magnesium peroxide body that had not been modified with polyacrylamide and ethyl cellulose was added to the suspension system. From the experimental structure, it did not play a substantial role in promoting the germination of wheat seeds.

[0109] Therefore, it can be concluded that using magnesium peroxide modified with polyacrylamide and ethyl cellulose in sequence as an adjuvant can effectively improve the germination rate of wheat seeds and has practical value.

[0110] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A seed treatment suspension containing thiabendazole, tebuconazole and imazalil, characterized in that: The seed treatment suspension comprises the following raw materials in percentage by mass: Thiabendazole 6%, tebuconazole 6%, imazalil 4%, dispersant 1%, ethylene glycol 13%, thickener 0.1%, preservative 0.5%, silicone 0.05%, dye 21%, epoxidized soybean oil 12%, auxiliary agent 1.5%, the balance is deionized water; the auxiliary agent is magnesium peroxide modified with polyacrylamide and ethyl cellulose in sequence, with a particle size of 5-10 μm; The preparation method of the auxiliary agent comprises the following steps: (1) dissolving polyacrylamide in ethylene glycol to prepare a polyacrylamide solution with a mass concentration of 20-30wt%; dissolving ethyl cellulose in ethanol to prepare an ethyl cellulose solution with a mass concentration of 10-15wt%; (2) First, magnesium peroxide is added to a polyacrylamide solution and stirred for 1-3 hours. The filtered residue is dried and crushed to obtain magnesium peroxide modified with polyacrylamide. Then, the polyacrylamide-modified magnesium peroxide is added to an ethyl cellulose solution and stirred for 2-5 hours. The filtered residue is dried and crushed to obtain magnesium peroxide modified with polyacrylamide and ethyl cellulose in sequence.

2. The seed treatment suspension containing thiabendazole, tebuconazole and imazalil according to claim 1, characterized in that: The dispersant includes at least one of lignin sulfonate, naphthalene sulfonate, fatty alcohol polyoxyethylene ether, and dialkyl sulfonyl succinic acid sodium salt.

3. The seed treatment suspension containing thiabendazole, tebuconazole and imazalil according to claim 1, characterized in that: The thickener includes at least one of sodium carboxymethyl cellulose, xanthan gum, bentonite, silicon dioxide and magnesium aluminum silicate.

4. The seed treatment suspension containing thiabendazole, tebuconazole and imazalil according to claim 1, characterized in that: The preservative includes at least one of sodium benzoate, p-hydroxybenzoic acid, salicylic acid, sorbic acid and kasone.

5. The seed treatment suspension containing thiabendazole, tebuconazole and imazalil according to claim 1, characterized in that: The dye comprises at least one of light-fast brilliant red BBC, light-fast red BBS, 3132 bright red powder and permanent red F4R.

6. The method for preparing a seed treatment suspension containing thiabendazole, tebuconazole and imazalil according to any one of claims 1 to 5, characterized in that: The preparation method comprises the following steps: Mixing: mixing thiabendazole, tebuconazole, imazalil, dispersant, ethylene glycol, thickener, preservative, silicone, dye, epoxy soybean oil, adjuvant and deionized water, and fully dispersing to obtain a mother solution; Coarse grinding: coarsely grind the mother liquor to obtain a coarse grinding liquid with a particle size of 8-10 μm; Fine grinding: The coarse grinding liquid is finely ground to obtain a semi-finished product with a particle size of 4-5μm. After the semi-finished product is settled, the finished seed treatment suspension is obtained.

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