Seed treatment suspending agent as well as preparation method and application thereof

Abstract

The invention relates to the technical field of pesticides, in particular to a seed treatment suspending agent and a preparation method and application thereof.The seed treatment suspending agent is prepared from active ingredients and auxiliaries, and the active ingredients account for 1-50 wt% of the seed treatment suspending agent; the active component comprises procymidone. According to the prepared seed treatment suspending agent, the active ingredient procymidone is introduced and applied to coating of soybean seeds, through the synergistic effect of auxiliaries, soybean root rot can be obviously treated, the quality of seedlings is improved, growth of the soybean seedlings is promoted, the prevention and treatment effect can reach 90% or above, resistance is not likely to be generated, and the seed treatment suspending agent has good market application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of pesticides, and in particular to a seed treatment suspending agent and a preparation method and application thereof. Background Art

[0002] Soybean, as one of the important food crops with a long history of cultivation in China for 5,000 years, is mainly produced in Northeast China. Its seeds are rich in high-quality plant protein. This crop is widely used to make a variety of soy products, extract soybean oil, brew soy sauce, and separate and purify protein. In addition, the remaining dregs or coarsely ground soybeans are also used as feed for poultry and livestock. However, soybean cultivation often faces a plant disease called soybean root rot. The disease mainly attacks the roots of soybeans, resulting in poor development of the soybean root system, a decrease in the number of nodules, short and thin growth of the aboveground part, light green leaves, and a significant decrease in the number of branches and pods. Both seedlings and adult soybeans may be infected. In the early stage of the disease, small irregular spots of light reddish brown will appear on the base of the stem or the epidermis of the radicle. These spots will then turn reddish brown and become sunken and necrotic, spread along the rhizome, and eventually lead to the death of the root bark. Soybean root rot poses a great threat to the quality and yield of soybeans.

[0003] At present, metalaxyl, ningnanmycin, brassinolide, foliar fertilizer, doxorubicin seed coating agent, etc. are usually used to prevent and control soybean root rot. For example, Chinese patent CN104472497A discloses a fungicide composition for preventing and controlling soybean root rot, which uses tetrafluthriae and metalaxyl-M as active ingredients to prevent and control soybean root rot. Due to the long-term use of a single agent, the resistance of soybean root rot increases year by year, making it difficult to prevent and control.

[0004] Procymidone is a new type of fungicide, which is a low-toxic fungicide and is widely used in the prevention and control of diseases of various crops. So far, the main formulations of Procymidone are wettable powder, suspension, and smoke agent, which are used for disease prevention and control by mechanical spraying or smoke fumigation. There are few studies on the application of Procymidone in seed treatment and prevention and control of soybean root rot. Summary of the invention

[0005] In order to solve the problems in the prior art, the first aspect of the present invention provides a seed treatment suspension, the raw materials for preparing the seed treatment suspension include active ingredients and adjuvants, the active ingredients account for 1-50wt% of the seed treatment suspension; the active ingredient includes procymidone.

[0006] In one embodiment, the active ingredient is procymidone.

[0007] In one embodiment, the active ingredient accounts for 5-10 wt% of the seed treatment suspension, which can be 5 wt%, 6 wt%, 7 wt%, 8 wt%, 9 wt%, 10 wt%, 20 wt%, 30 wt%, 40 wt%, 50 wt%.

[0008] In one embodiment, the auxiliary agent includes a surfactant, a film former, a defoaming agent, a thickener, a warning color and water.

[0009] In one embodiment, the surfactant includes at least one of aromatic polyoxyethylene ether and calcium alkylbenzene sulfonate.

[0010] In a preferred embodiment, the surfactant includes aromatic polyoxyethylene ether and calcium alkylbenzene sulfonate.

[0011] In one embodiment, the surfactant accounts for 5-10 wt % of the seed treatment suspension, which may be 5 wt %, 6 wt %, 7 wt %, 8 wt %, 9 wt %, or 10 wt %.

[0012] In one embodiment, the aromatic polyoxyethylene ether includes styrylphenol polyoxyethylene ether.

[0013] The Chinese name of the styrylphenol polyoxyethylene ether in the present invention is Nongru 600, and the manufacturer is not limited, and the styrylphenol polyoxyethylene ether can be purchased from Hebei Cangzhou Hongyuan Chemical Co., Ltd.

[0014] In one embodiment, the calcium alkylbenzene sulfonate comprises calcium dodecylbenzene sulfonate.

[0015] The Chinese name of calcium dodecylbenzene sulfonate in the present invention is Nongru 500, and the manufacturer is not limited, and the product can be purchased from Hebei Cangzhou Hongyuan Chemical Co., Ltd.

[0016] In one embodiment, the mass ratio of the aromatic polyoxyethylene ether to calcium alkylbenzene sulfonate is (3-6):(2-5).

[0017] In a preferred embodiment, the mass ratio of the aromatic polyoxyethylene ether to calcium alkylbenzene sulfonate is any one of 3:2, 4:3, 5:3, 5.5:4.5, and 6:5.

[0018] In one embodiment, the film-forming agent is selected from at least one of polyethylene glycol, polyvinyl alcohol, and polyvinyl acetate.

[0019] In a preferred embodiment, the film-forming agent is polyvinyl alcohol.

[0020] The present invention does not limit the manufacturer of polyvinyl alcohol, and the polyvinyl alcohol can be purchased from Shanghai Ruichu Biotechnology Co., Ltd.

[0021] In one embodiment, the film-forming agent accounts for 1-5 wt% of the seed treatment suspension, and may be 1 wt%, 2 wt%, 3 wt%, 4 wt%, or 5 wt%.

[0022] In one embodiment, the thickening agent comprises xanthan gum.

[0023] The present invention does not limit the manufacturer of xanthan gum, and the xanthan gum can be purchased from Guangzhou Zhongxuan Chemical Co., Ltd.

[0024] In the present invention, xanthan gum not only has the ability to adjust the viscosity of the system, but its sol molecules can also construct a gel network structure that can effectively wrap and protect the active ingredients in the system, thereby improving its stability; at the same time, it synergizes with other adjuvants in the system to improve the suspension rate of the seed treatment suspension.

[0025] In one embodiment, the thickener accounts for 0.2-0.6 wt % of the seed treatment suspension, and may be 0.2 wt %, 0.3 wt %, 0.4 wt %, 0.5 wt %, or 0.6 wt %.

[0026] In one embodiment, the defoaming agent accounts for 0.2-0.5 wt % of the seed treatment suspending agent, and may be 0.2 wt %, 0.3 wt %, 0.4 wt %, or 0.5 wt %.

[0027] In one embodiment, the defoaming agent comprises a silicone defoaming agent.

[0028] In a preferred embodiment, the brand of the organosilicon defoamer is selected from any one of AF1501, AF1500, AF1506 and AF207.

[0029] In a more preferred embodiment, the brand of the organosilicon defoamer is AF1506, which is purchased from Guangzhou Fangzhong Chemical Co., Ltd.

[0030] The present invention does not specifically limit the warning color. In one embodiment, the warning color is rose essence, which is purchased from Shaoxing Pan Asia Chemical Co., Ltd.

[0031] In one embodiment, the warning color accounts for 0.5-3.5 wt% of the seed treatment suspension, and may be 0.5 wt%, 1 wt%, 1.5 wt%, 2 wt%, 2.5 wt%, 3 wt%, or 3.5 wt%.

[0032] The second aspect of the present invention provides a method for preparing a seed treatment suspension concentrate, comprising at least the following steps:

[0033] The material obtained by mixing the active ingredient and the auxiliary agent is stirred, sheared, ground and then stirred again to obtain the product.

[0034] In one embodiment, the grinding standard is that the particle size D50 of the ground material is ≤8 μm.

[0035] In one embodiment, the stirring time is 30-40 min.

[0036] A third aspect of the present invention provides an application of a seed treatment suspension, wherein the seed treatment suspension is applied to coating soybean seeds for preventing and controlling soybean root rot.

[0037] In one embodiment, the seed treatment suspension is applied to the coating of soybean seeds. The method comprises: placing the seeds to be treated in a container, obtaining the seed treatment suspension according to a mass ratio of the seed treatment suspension to the seeds of 1: (50-1250), diluting the seed treatment suspension with water at a mass ratio of the seed treatment suspension to water of 1: (0-19), mixing the diluted seed treatment suspension with the seeds at a mass ratio of 1: (50-125), and then drying naturally.

[0038] Beneficial Effects

[0039] 1. The seed treatment suspension prepared by the present invention, by introducing the active ingredient procymidone, is applied to the coating of soybean seeds, which can significantly prevent and treat soybean root rot, promote soybean growth, and improve soybean quality and yield.

[0040] 2. The present invention uses polyvinyl alcohol as a specific film-forming agent, which can improve compatibility with the active ingredients and other additives in the system, which not only ensures the dispersibility of the particles in the system, but also facilitates the uniformity of the coating of the suspension on the seed surface.

[0041] 3. The present invention selects a specific surfactant combination, specifically styrylphenol polyoxyethylene ether and calcium dodecylbenzene sulfonate, and limits the mass ratio of the two to (3-6): (2-5), which can effectively improve the stability and uniformity of the seed treatment suspension.

[0042] 4. After 4 years of continuous use, the seed treatment suspension provided by the present invention has no obvious decreasing trend in its control effect and is not prone to resistance.

[0043] 5. The seed treatment suspension provided by the present invention can significantly treat soybean root rot, improve the quality of seedlings, and promote the growth of soybean seedlings through the synergistic effect between adjuvants. The prevention and control effect can reach more than 90%, and it has good market application prospects. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The experimental methods in the examples without specifying specific conditions are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used without specifying the manufacturer are all conventional products that can be purchased commercially.

[0045] Example 1

[0046] The first aspect of this embodiment provides a seed treatment suspension, wherein the raw materials for preparing the seed treatment suspension include an active ingredient and an adjuvant, wherein the active ingredient accounts for 1 wt % of the seed treatment suspension; and the active ingredient is procymidone.

[0047] The auxiliary agents include surfactants, film formers, defoamers, thickeners, warning colors and water.

[0048] The surfactant accounts for 5 wt % of the seed treatment suspension.

[0049] The surfactant is polyoxyethylene styrylphenol ether and calcium dodecylbenzene sulfonate, and the mass ratio of polyoxyethylene styrylphenol ether to calcium dodecylbenzene sulfonate is 3:2. The polyoxyethylene styrylphenol ether and calcium dodecylbenzene sulfonate are purchased from Hebei Cangzhou Hongyuan Chemical Co., Ltd.

[0050] The film-forming agent accounts for 2wt% of the seed treatment suspension. The film-forming agent is polyvinyl alcohol, which is purchased from Shanghai Ruichu Biotechnology Co., Ltd.

[0051] The thickener accounts for 0.5wt% of the seed treatment suspension. The thickener is xanthan gum, which is purchased from Guangzhou Zhongxuan Chemical Co., Ltd.

[0052] The defoamer accounts for 0.3 wt % of the seed treatment suspending agent. The defoamer is an organosilicon defoamer, the brand of the organosilicon defoamer is AF1506, and is purchased from Guangzhou Fangzhong Chemical Co., Ltd.

[0053] The warning color accounts for 0.5wt% of the seed treatment suspension. The warning color is rose essence purchased from Shaoxing Pan Asia Chemical Co., Ltd. The water makes up the balance.

[0054] The second aspect of the present embodiment provides a method for preparing a seed treatment suspension, which comprises at least the following steps: stirring, shearing and grinding a mixture of active ingredients and adjuvants until the material particle size D50 is ≤ 8 μm, and then stirring again for 30 minutes to obtain a seed treatment suspension.

[0055] A third aspect of the present invention provides an application of a seed treatment suspension, wherein the seed treatment suspension is applied to coating soybean seeds for preventing and controlling soybean root rot.

[0056] The method for coating soybean seeds with the seed treatment suspension comprises: placing seeds to be treated in a container, obtaining the seed treatment suspension according to a mass ratio of the seed treatment suspension to the seeds of 1:50, mixing the seed treatment suspension with the seeds according to a mass ratio of 1:50, and then drying naturally.

[0057] Example 2

[0058] The first aspect of this embodiment provides a seed treatment suspension, wherein the raw materials for preparing the seed treatment suspension include an active ingredient and an adjuvant, wherein the active ingredient accounts for 5 wt % of the seed treatment suspension; and the active ingredient is procymidone.

[0059] The auxiliary agents include surfactants, film formers, defoamers, thickeners, warning colors and water.

[0060] The surfactant accounts for 7 wt % of the seed treatment suspension.

[0061] The surfactant is polyoxyethylene styrylphenol ether and calcium dodecylbenzene sulfonate, and the mass ratio of polyoxyethylene styrylphenol ether to calcium dodecylbenzene sulfonate is 4:3. The polyoxyethylene styrylphenol ether and calcium dodecylbenzene sulfonate are purchased from Hebei Cangzhou Hongyuan Chemical Co., Ltd.

[0062] The film-forming agent accounts for 3wt% of the seed treatment suspension. The film-forming agent is polyvinyl alcohol, which is purchased from Shanghai Ruichu Biotechnology Co., Ltd.

[0063] The thickener accounts for 0.5wt% of the seed treatment suspension. The thickener is xanthan gum, which is purchased from Guangzhou Zhongxuan Chemical Co., Ltd.

[0064] The defoamer accounts for 0.3 wt % of the seed treatment suspending agent. The defoamer is an organosilicon defoamer, the brand of the organosilicon defoamer is AF1506, and is purchased from Guangzhou Fangzhong Chemical Co., Ltd.

[0065] The warning color accounts for 1.5wt% of the seed treatment suspension. The warning color is rose essence purchased from Shaoxing Pan Asia Chemical Co., Ltd. The water makes up the balance.

[0066] The second aspect of the present embodiment provides a method for preparing a seed treatment suspension, which comprises at least the following steps: stirring, shearing and grinding a mixture of active ingredients and adjuvants until the material particle size D50 is ≤ 8 μm, and then stirring again for 30 minutes to obtain a seed treatment suspension.

[0067] A third aspect of the present invention provides an application of a seed treatment suspension, wherein the seed treatment suspension is applied to coating soybean seeds for preventing and controlling soybean root rot.

[0068] The method for coating soybean seeds with the seed treatment suspension comprises: placing seeds to be treated in a container, obtaining the seed treatment suspension according to a mass ratio of the seed treatment suspension to the seeds of 1:250, diluting the seed treatment suspension with water according to a mass ratio of the seed treatment suspension to water of 1:1, mixing the diluted seed treatment suspension with the seeds according to a mass ratio of 1:125, and then drying naturally.

[0069] Example 3

[0070] The first aspect of this embodiment provides a seed treatment suspension, wherein the raw materials for preparing the seed treatment suspension include an active ingredient and an adjuvant, wherein the active ingredient accounts for 10 wt % of the seed treatment suspension; and the active ingredient is procymidone.

[0071] The auxiliary agents include surfactants, film formers, defoamers, thickeners, warning colors and water.

[0072] The surfactant accounts for 7 wt % of the seed treatment suspension.

[0073] The surfactant is polyoxyethylene styrylphenol ether and calcium dodecylbenzene sulfonate, and the mass ratio of polyoxyethylene styrylphenol ether to calcium dodecylbenzene sulfonate is 4:3. The polyoxyethylene styrylphenol ether and calcium dodecylbenzene sulfonate are purchased from Hebei Cangzhou Hongyuan Chemical Co., Ltd.

[0074] The film-forming agent accounts for 3wt% of the seed treatment suspension. The film-forming agent is polyvinyl alcohol, which is purchased from Shanghai Ruichu Biotechnology Co., Ltd.

[0075] The thickener accounts for 0.5wt% of the seed treatment suspension. The thickener is xanthan gum, which is purchased from Guangzhou Zhongxuan Chemical Co., Ltd.

[0076] The defoamer accounts for 0.3 wt % of the seed treatment suspending agent. The defoamer is an organosilicon defoamer, the brand of the organosilicon defoamer is AF1506, and is purchased from Guangzhou Fangzhong Chemical Co., Ltd.

[0077] The warning color accounts for 1.5wt% of the seed treatment suspension. The warning color is rose essence purchased from Shaoxing Pan Asia Chemical Co., Ltd. The water makes up the balance.

[0078] The second aspect of the present embodiment provides a method for preparing a seed treatment suspension, which comprises at least the following steps: stirring, shearing and grinding a mixture of active ingredients and adjuvants until the material particle size D50 is ≤ 8 μm, and then stirring again for 30 minutes to obtain a seed treatment suspension.

[0079] A third aspect of the present invention provides an application of a seed treatment suspension, wherein the seed treatment suspension is applied to coating soybean seeds for preventing and controlling soybean root rot.

[0080] The method for coating soybean seeds with the seed treatment suspension comprises: placing seeds to be treated in a container, obtaining the seed treatment suspension according to a mass ratio of the seed treatment suspension to the seeds of 1:500, diluting the seed treatment suspension with water at a mass ratio of the seed treatment suspension to water of 1:4, mixing the diluted seed treatment suspension with the seeds at a mass ratio of 1:100, and then drying naturally.

[0081] Example 4

[0082] The first aspect of this embodiment provides a seed treatment suspension concentrate, wherein the raw materials for preparing the seed treatment suspension concentrate include an active ingredient and an adjuvant, wherein the active ingredient accounts for 25 wt % of the seed treatment suspension concentrate; and the active ingredient is procymidone.

[0083] The auxiliary agents include surfactants, film formers, defoamers, thickeners, warning colors and water.

[0084] The surfactant accounts for 8 wt % of the seed treatment suspension.

[0085] The surfactant is polyoxyethylene styrylphenol ether and calcium dodecylbenzene sulfonate, and the mass ratio of polyoxyethylene styrylphenol ether to calcium dodecylbenzene sulfonate is 5:3. The polyoxyethylene styrylphenol ether and calcium dodecylbenzene sulfonate are purchased from Hebei Cangzhou Hongyuan Chemical Co., Ltd.

[0086] The film-forming agent accounts for 5wt% of the seed treatment suspension. The film-forming agent is polyvinyl alcohol, which is purchased from Shanghai Ruichu Biotechnology Co., Ltd.

[0087] The thickener accounts for 0.5wt% of the seed treatment suspension. The thickener is xanthan gum, which is purchased from Guangzhou Zhongxuan Chemical Co., Ltd.

[0088] The defoamer accounts for 0.3 wt % of the seed treatment suspending agent. The defoamer is an organosilicon defoamer, the brand of the organosilicon defoamer is AF1506, and is purchased from Guangzhou Fangzhong Chemical Co., Ltd.

[0089] The warning color accounts for 2.5 wt % of the seed treatment suspension. The warning color is rose essence purchased from Shaoxing Pan Asia Chemical Co., Ltd. The water makes up the balance.

[0090] The second aspect of the present embodiment provides a method for preparing a seed treatment suspension, which comprises at least the following steps: stirring, shearing and grinding a mixture of active ingredients and adjuvants until the material particle size D50 is ≤ 8 μm, and then stirring again for 30 minutes to obtain a seed treatment suspension.

[0091] A third aspect of the present invention provides an application of a seed treatment suspension, wherein the seed treatment suspension is applied to coating soybean seeds for preventing and controlling soybean root rot.

[0092] The method for coating soybean seeds with the seed treatment suspension comprises: placing seeds to be treated in a container, obtaining the seed treatment suspension according to a mass ratio of the seed treatment suspension to the seeds of 1:1250, diluting the seed treatment suspension with water according to a mass ratio of the seed treatment suspension to water of 1:9, mixing the diluted seed treatment suspension with the seeds according to a mass ratio of 1:125, and then drying naturally.

[0093] Example 5

[0094] The first aspect of this embodiment provides a seed treatment suspension, wherein the raw materials for preparing the seed treatment suspension include an active ingredient and an adjuvant, wherein the active ingredient accounts for 50 wt % of the seed treatment suspension; and the active ingredient is procymidone.

[0095] The auxiliary agents include surfactants, film formers, defoamers, thickeners, warning colors and water.

[0096] The surfactant accounts for 10 wt % of the seed treatment suspension.

[0097] The surfactant is polyoxyethylene styrylphenol ether and calcium dodecylbenzene sulfonate, and the mass ratio of polyoxyethylene styrylphenol ether to calcium dodecylbenzene sulfonate is 5.5:4.5. The polyoxyethylene styrylphenol ether and calcium dodecylbenzene sulfonate are purchased from Hebei Cangzhou Hongyuan Chemical Co., Ltd.

[0098] The film-forming agent accounts for 5wt% of the seed treatment suspension. The film-forming agent is polyvinyl alcohol, which is purchased from Shanghai Ruichu Biotechnology Co., Ltd.

[0099] The thickener accounts for 0.5wt% of the seed treatment suspension. The thickener is xanthan gum, which is purchased from Guangzhou Zhongxuan Chemical Co., Ltd.

[0100] The defoamer accounts for 0.3 wt % of the seed treatment suspending agent. The defoamer is an organosilicon defoamer, the brand of the organosilicon defoamer is AF1506, and is purchased from Guangzhou Fangzhong Chemical Co., Ltd.

[0101] The warning color accounts for 3.5 wt % of the seed treatment suspension. The warning color is rose essence purchased from Shaoxing Pan Asia Chemical Co., Ltd. The water makes up the balance.

[0102] The second aspect of the present embodiment provides a method for preparing a seed treatment suspension, which comprises at least the following steps: stirring, shearing and grinding a mixture of active ingredients and adjuvants until the material particle size D50 is ≤ 8 μm, and then stirring again for 30 minutes to obtain a seed treatment suspension.

[0103] A third aspect of the present invention provides an application of a seed treatment suspension, wherein the seed treatment suspension is applied to coating soybean seeds for preventing and controlling soybean root rot.

[0104] The method for coating soybean seeds with the seed treatment suspension comprises: placing seeds to be treated in a container, obtaining the seed treatment suspension according to a mass ratio of the seed treatment suspension to the seeds of 1:2500, diluting the seed treatment suspension with water at a mass ratio of the seed treatment suspension to water of 1:19, mixing the diluted seed treatment suspension with the seeds at a mass ratio of 1:125, and then drying naturally.

[0105] Performance Testing Methods

[0106] 1. The seed treatment suspension prepared in Examples 1-5 and a commercially available 63 g / L metalaxyl-fludioxonil seed treatment suspension (purchased from Tianjin Kerun Northern Seed Coating Agent Co., Ltd.) were subjected to field efficacy tests. The results are shown in Table 1.

[0107] Experimental location: Gongzhuling City, Jilin Province.

[0108] Trial time: May 2020.

[0109] Experimental agents: Example 1: 1.0% procymidone seed treatment suspension, Example 2: 5% procymidone seed treatment suspension, Example 3: 10% procymidone seed treatment suspension, Example 4: 25% procymidone seed treatment suspension, Example 5: 50% procymidone seed treatment suspension, Comparative Example: 63 g / L metalaxyl-fluanid seed treatment suspension.

[0110] Calculation method of control effect:

[0111] (Incidence rate in control area - Incidence rate in treated area) / Incidence rate in control area × 100%

[0112] Soybean safety inspection: Observe the color and growth of soybeans with naked eyes to see if they are normal. If there is no obvious difference compared with other non-treated areas, it is considered as cooperation. If there is any abnormality, it will be recorded truthfully.

[0113] Table 1

[0114]

[0115]

[0116] 2. The seed treatment suspension prepared in Examples 1-5 and a commercially available 63 g / L metalaxyl-fludioxonil seed treatment suspension (purchased from Tianjin Kerun Northern Seed Coating Agent Co., Ltd.) were subjected to field efficacy tests. The results are shown in Table 2.

[0117] Test location: Gongzhuling City, Jilin Province.

[0118] Trial time: May 2021.

[0119] Experimental agents: Example 1: 1.0% procymidone seed treatment suspension, Example 2: 5% procymidone seed treatment suspension, Example 3: 10% procymidone seed treatment suspension, Example 4: 25% procymidone seed treatment suspension, Example 5: 50% procymidone seed treatment suspension, Comparative Example: 63 g / L metalaxyl-fluanid seed treatment suspension.

[0120] Calculation method of control effect:

[0121] (Incidence rate in control area - Incidence rate in treated area) / Incidence rate in control area × 100%

[0122] Soybean safety inspection: Observe the color and growth of soybeans with naked eyes to see if they are normal. If there is no obvious difference compared with other non-treated areas, it is considered as cooperation. If there is any abnormality, it will be recorded truthfully.

[0123] Table 2

[0124]

[0125] 3. The seed treatment suspension prepared in Examples 1-5 and a commercially available 63 g / L metalaxyl-fludioxonil seed treatment suspension (purchased from Tianjin Kerun Northern Seed Coating Agent Co., Ltd.) were subjected to field efficacy tests. The results are shown in Table 3.

[0126] Experimental location: Gongzhuling City, Jilin Province.

[0127] Trial time: May 2022.

[0128] Experimental agents: Example 1: 1.0% procymidone seed treatment suspension, Example 2: 5% procymidone seed treatment suspension, Example 3: 10% procymidone seed treatment suspension, Example 4: 25% procymidone seed treatment suspension, Example 5: 50% procymidone seed treatment suspension, Comparative Example: 63 g / L metalaxyl-fluanid seed treatment suspension.

[0129] Calculation method of control effect:

[0130] (Incidence rate in control area - Incidence rate in treated area) / Incidence rate in control area × 100%

[0131] Soybean safety inspection: Observe the color and growth of soybeans with naked eyes to see if they are normal. If there is no obvious difference compared with other non-treated areas, it is considered as cooperation. If there is any abnormality, it will be recorded truthfully.

[0132] Table 3

[0133]

[0134] 4. The seed treatment suspension prepared in Examples 1-5 and a commercially available 63 g / L metalaxyl-fludioxonil seed treatment suspension (purchased from Tianjin Kerun Northern Seed Coating Agent Co., Ltd.) were subjected to field efficacy tests. The results are shown in Table 4.

[0135] Experimental location: Gongzhuling City, Jilin Province.

[0136] Trial time: May 2023.

[0137] Experimental agents: Example 1: 1.0% procymidone seed treatment suspension, Example 2: 5% procymidone seed treatment suspension, Example 3: 10% procymidone seed treatment suspension, Example 4: 25% procymidone seed treatment suspension, Example 5: 50% procymidone seed treatment suspension, Comparative Example: 63 g / L metalaxyl-fluanid seed treatment suspension.

[0138] Calculation method of control effect:

[0139] (Incidence rate in control area - Incidence rate in treated area) / Incidence rate in control area × 100%

[0140] Soybean safety inspection: Observe the color and growth of soybeans with naked eyes to see if they are normal. If there is no obvious difference compared with other non-treated areas, it is considered as cooperation. If there is any abnormality, it will be recorded truthfully.

[0141] Table 4

[0142]

[0143]

[0144] It can be seen from the above-mentioned 4-year continuous field efficacy test that the seed treatment suspension prepared by the present invention is used for soybean seed treatment, and has a good control effect on soybean root rot. The control effect of each treatment reaches more than 90%, and the safety is qualified. Moreover, during continuous use, the control effect does not show a significant downward trend, indicating that it is not easy to produce resistance. During continuous use of the control agent used in the comparative example, the data show that the control effect shows a downward trend year by year, indicating that the control agent gradually produces resistance and the control effect is significantly reduced.

Claims

1. A seed treatment suspending agent, characterized in that: The raw materials for preparing the seed treatment suspension include active ingredients and adjuvants, wherein the active ingredients account for 1-50wt% of the seed treatment suspension; and the active ingredients include procymidone.

2. The seed treatment suspending agent according to claim 1, characterized in that The active ingredient accounts for 5-10 wt% of the seed treatment suspension.

3. The seed treatment suspending agent according to any one of claims 1-2, characterized in that The auxiliary agents include surfactants, film formers, defoamers, thickeners, warning colors and water.

4. The seed treatment suspending agent according to claim 3, characterized in that The surfactant includes at least one of aromatic polyoxyethylene ether and calcium alkylbenzene sulfonate.

5. The seed treatment suspending agent according to claim 4, characterized in that The mass ratio of the aromatic polyoxyethylene ether to calcium alkylbenzene sulfonate is (3-6):(2-5).

6. The seed treatment suspending agent according to claim 3, characterized in that The film-forming agent is selected from at least one of polyethylene glycol, polyvinyl alcohol and polyvinyl acetate.

7. The seed treatment suspending agent according to claim 6, characterized in that The thickener includes xanthan gum.

8. A method for preparing a seed treatment suspension according to any one of claims 1 to 7, characterized in that: At least the following steps are included: The material obtained by mixing the active ingredient and the auxiliary agent is stirred, sheared, ground and then stirred again to obtain the product.

9. The method for preparing the seed treatment suspending agent according to claim 8, characterized in that: The grinding standard is that the particle size of the material after grinding is D50≤8μm.

10. A use of the seed treatment suspending agent according to any one of claims 1 to 7, characterized in that: The seed treatment suspension is applied to coating soybean seeds and is used for preventing and treating soybean root rot.

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