Seed coating agent capable of resisting low-temperature phytotoxicity

Abstract

The invention relates to the technical field of pesticides, in particular to a seed coating agent capable of resisting low-temperature phytotoxicity. The invention relates to a low-temperature-phytotoxicity-resistant seed coating agent, which comprises an active component and an auxiliary agent, wherein the auxiliary agent comprises a stress-resistant component and a wetting dispersant; the stress-resistant component and the wetting dispersant respectively account for 0.03%-0.5% and 0.5%-10% of the weight of the preparation; the stress-resistant component is a mixture of gibberellin, auxin and cytokinin, wherein the weight percentage of the gibberellin is 0.01%-0.1%. The seed coating agent disclosed by the invention is used for coating corn seeds, can remarkably improve the germination potential and germination rate of the seeds under a low-temperature condition, and reduces the occurrence of phytotoxicity. The seed coating agent disclosed by the invention has an obvious stress resistance effect under a low-temperature condition, the safety of coated seeds is improved, and the seed coating agent has a good application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of pesticides, and in particular to a seed coating agent that resists low-temperature pesticide damage. Background Art

[0002] Tebuconazole is a highly effective, broad-spectrum, systemic triazole fungicide pesticide with three functions: protection, treatment, and eradication. It has a broad fungicide spectrum and a long lasting effect. When used for seed treatment, it can effectively prevent head smut, loose smut, damping-off, seedling blight, sheath blight, etc. However, during use, it will have a certain degree of inhibitory effect on seed germination and seedling growth, especially under conditions of excessive dosage, low temperature, high humidity, etc., which is more likely to cause phytotoxicity. This has seriously restricted the widespread use of tebuconazole in seed treatment.

[0003] At present, the main ways to prevent and control the phytotoxicity of tebuconazole seed coating agents are: first, avoid using it at low temperatures during use; second, add anti-adversity substances such as chitosan oligosaccharides, gibberellins, trace elements, and microbial extracts during use; third, use formulation technology to microencapsulate the active ingredients to reduce the biological concentration during use. In patent CN105265430B, chitosan oligosaccharides are added to alleviate the phytotoxicity of tebuconazole, and the germination rate of seeds can be increased to the same level as blank seeds, but its effect on the germination potential of seeds is limited; in patent CN105255755A, microbial strains are added to alleviate the phytotoxicity of tebuconazole, and the germination rate of seeds can be increased to the same level as blank seeds, but the microbial strains have poor stability, which affects wide use; in patent CN101416631A, the phytotoxicity of tebuconazole is reduced by microencapsulating the active ingredients, and the inhibition of the active ingredients of pesticides on seed vitality is reduced by reducing the dosage of the active ingredients of tebuconazole that the seeds are exposed to per unit time during the seed germination process, thereby improving the germination rate of seeds. The preparation process of microcapsule seed coating agents is relatively complicated and the cost is high. Wu Lingling et al. (Wu Lingling, Li Qingyang, Peng Xudan et al. Effect and mechanism of different trace elements soaking seeds on the mitigation of tebuconazole seed dressing agent damage to corn [J]. Pesticides, 2016, 55(06): 445-449) studied the effect of different trace elements soaking seeds on the mitigation of tebuconazole seed dressing agent damage to corn, and found that there was a certain effect, but there was still a gap compared with the blank control. The above methods of mitigating tebuconazole damage all have some corresponding problems, either the effect is limited and the effect on germination potential is not obvious; or the preparation and storage are difficult, which is not conducive to promotion and use. Summary of the invention

[0004] The object of the present invention is to provide a seed coating agent having the function of resisting low temperature damage.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A seed coating agent for resisting low temperature damage, comprising active ingredients and adjuvants, wherein the adjuvants contain stress-resistant components and wetting and dispersing agents; the stress-resistant components and wetting and dispersing agents account for 0.03% to 0.5% and 0.5% to 10% of the weight of the preparation respectively; the stress-resistant components are a mixture of gibberellins, auxins and cytokinins, wherein the weight percentage of gibberellins is 0.01% to 0.1%.

[0007] The auxin is selected from one of 3-indolebutyric acid, 3-indoleacetic acid, 1-naphthylacetic acid and 3-indolepropionic acid; wherein the ratio of gibberellin to auxin is 1:1 to 1:10.

[0008] The cytokinin is selected from one of zeatin, kinetin (KT), 6-benzylaminopurine (6-BAP), chlorpyrifos (CPPU) and thidiazuron (TDZ); wherein the ratio of gibberellin to cytokinin is 1:1 to 1:10.

[0009] The active component is tebuconazole, and the weight percentage of the active component in the seed coating agent is 2% to 10%.

[0010] The wetting and dispersing agent is one or more of anionic surfactant, nonionic surfactant and anionic and nonionic compound surfactant; and its weight percentage of the seed coating agent is 0.5% to 10%.

[0011] The anionic surfactant is one or more of sulfonates, sulfates, carboxylates, phosphates, and succinates; the nonionic surfactant is one or more of fatty alcohol polyoxyethylene ethers, alkylphenol polyoxyethylene ethers, fatty amine polyoxyethylene ethers, acid alcohol esters and their polyoxyethylene ethers, castor oil polyoxyethylene ethers, alkanolamides and their polyoxyethylene ethers, sodium alkylnaphthalene sulfonate fatty alcohol polyoxyethylene ethers, sorbitan fatty acid ester polyoxyethylene ethers, phenethylphenol polyoxyethylene polyoxypropylene ethers, and formaldehyde condensates; the anionic and nonionic compound surfactant is a mixture of one or more anionic surfactants and one or more nonionic surfactants.

[0012] The auxiliary agent is one or more of a thickener, a defoamer, a preservative and a warning color.

[0013] If the system needs to improve stability, a substance with a thickening function can be added. The thickener can be one or more of xanthan gum, gelatin, gum arabic, polyvinyl acetate, polyvinyl pyrrolidone, magnesium aluminum silicate, polyvinyl alcohol, polyethylene glycol, phenolic resin, shellac, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose and sodium alginate, which can improve the stability of the preparation to a certain extent.

[0014] When bubbles appear in the system, a defoaming agent can be used to eliminate the bubbles. The defoaming agent can be one or more of SAG1522, silicones, C8-10 fatty alcohols, phosphates, C10-20 saturated fatty acids (such as capric acid) and amides or others.

[0015] A substance with an antiseptic function may also be added to the system. The antiseptic may be one or more of sodium benzoate, kasone (2-methyl-4-isothiazoline-3-one and (B) 5-chloro-2-methyl-4-isothiazoline-3-one), potassium sorbate, sodium dehydroacetate or others.

[0016] Alarm color agents may include dyes, pigments (including toners and color pastes), etc.

[0017] In various cases where different adjuvants are selected, it should be ensured that the active components of the present invention are evenly distributed and exert their active effects. The specific preparation method of the preparation is as follows:

[0018] Active components, stress-resistant components, wetting and dispersing agents and other functional additives are sheared and coarsely crushed using a high shear disperser, and then transferred to a sand mill for sand grinding until the particle size is qualified, and then warning colors and film-forming substances are added and stirred evenly.

[0019] To evaluate the stress resistance of seed coating agents, the germination potential and germination rate of seeds at low temperatures were tested.

[0020] An application of the seed coating agent for resisting low temperature damage, wherein the seed coating agent is used as corn seed coating in preventing and controlling corn head smut

[0021] The advantages of the present invention are:

[0022] Gibberellins promote the elongation of plant stem nodes, promote flower bud differentiation and flowering, participate in sex control, break dormancy, and promote germination; auxins promote the occurrence of lateral roots and adventitious roots, regulate flowering and sex differentiation, regulate fruit setting and fruit development, and control apical dominance; cytokinins promote bud differentiation, delay leaf senescence, promote lateral bud development, eliminate apical dominance, and promote cell division and expansion. Gibberellins, auxins, and cytokinins are plant growth regulators. Their functions and effects have many similarities and influence each other. Auxin can increase the level of gibberellins in plants by increasing the expression of key enzymes in the synthesis of gibberellins, and auxins can also inhibit the inactivation of gibberellins. Both auxins and cytokinins play a role in regulating the cell cycle and promoting cell division, but auxins mainly promote the division of the nucleus, while cytokinins mainly promote the division of the cytoplasm. Auxin can prolong the duration of cytokinins, and cytokinins can promote the polar transport of auxins. The present invention uses different types of plant growth regulators in a compound manner, which has a synergistic effect and can enhance the effects at different stages and under different environmental conditions. DETAILED DESCRIPTION

[0023] The following specific examples are used to further illustrate the present invention, but the present invention is by no means limited to these examples. Methods well known to those skilled in the art are all included in the scope of the present invention. The percentages and parts in the formula are all by weight. The active components are added in 100% dosage, the proportions of each component are by weight, and the other raw materials are all commercially available.

[0024] Comparative Example 1-1.2% Tebuconazole seed treatment suspension

[0025] According to the formula requirements, 2% of tebuconazole, 2% of Morwet D-425, 5% of SK-34SC, 1% of magnesium aluminum silicate, 0.2% of xanthan gum, 5% of ethylene glycol, 0.2% of SAG 1522, 3% of Red-131, 2% of PVP / VA64, and 0.2% of sodium benzoate are added, and water is added to 100%. The materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 2% tebuconazole seed treatment suspension. Comparative Example 1-2.2% tebuconazole seed treatment suspension

[0026] According to the formula requirements, 2% of tebuconazole, 0.01% of gibberellin, 2% of Morwet D-425, 5% of SK-34SC, 1% of magnesium aluminum silicate, 0.2% of xanthan gum, 5% of ethylene glycol, 0.2% of SAG 1522, 3% of Red-131, 2% of PVP / VA64, and 0.2% of sodium benzoate are added, and water is added to 100%. The materials are crushed by high shear treatment and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 2% tebuconazole seed treatment suspension.

[0027] Comparative Example 1-3.2% Tebuconazole seed treatment suspension

[0028] According to the formula requirements, 2% of tebuconazole, 0.01% of gibberellin, 0.02% of 3-indoleacetic acid, 2% of Morwet D-425, 5% of SK-34SC, 1% of magnesium aluminum silicate, 0.2% of xanthan gum, 5% of ethylene glycol, 0.2% of SAG 1522, 3% of Red-131, 2% of PVP / VA64, and 0.2% of sodium benzoate are added, and water is added to 100%. The materials are crushed by high shear treatment and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 2% tebuconazole seed treatment suspension.

[0029] Comparison of 1-4.2% Tebuconazole seed treatment suspension

[0030] According to the formula requirements, 2% of tebuconazole, 0.01% of gibberellin, 0.01% of zeatin, 2% of Morwet D-425, 5% of SK-34SC, 1% of magnesium aluminum silicate, 0.2% of xanthan gum, 5% of ethylene glycol, 0.2% of SAG 1522, 3% of Red-131, 42% of PVP / VA6, and 0.2% of sodium benzoate are added, and water is added to 100%. The materials are crushed by high shear treatment and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 2% tebuconazole seed treatment suspension.

[0031] Example 1-1.2% Tebuconazole Seed Treatment Suspension Concentrate

[0032] According to the formula requirements, 2% of tebuconazole, 0.01% of gibberellin, 0.02% of 3-indoleacetic acid, 0.01% of zeatin, 2% of Morwet D-425, 5% of SK-34SC, 1% of magnesium aluminum silicate, 0.2% of xanthan gum, 5% of ethylene glycol, 0.2% of SAG 1522, 3% of Red-131, 2% of PVP / VA64, and 0.2% of sodium benzoate are added, and water is added to 100%. The materials are crushed by high shear treatment and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 2% tebuconazole seed treatment suspension.

[0033] Comparative Example 2-1.6% Tebuconazole seed treatment suspension

[0034] According to the formula requirements, 6% of tebuconazole, 4% of TENSIOFIX AMS303, 2% of W-600, 1% of magnesium aluminum silicate, 0.2% of xanthan gum, 5% of ethylene glycol, 0.2% of SAG 1522, 5% of Red-131, 4% of PVP / VA64, and 0.2% of sodium benzoate are added, and water is added to 100%. The materials are crushed by high shear treatment and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain a 6% tebuconazole seed treatment suspension. Comparative Example 2-2.6% tebuconazole seed treatment suspension

[0035] According to the formula requirements, tebuconazole 6%, gibberellin 0.01%, TENSIOFIX AMS303 4%, W-600 2%, magnesium aluminum silicate 1%, xanthan gum 0.2%, ethylene glycol 5%, SAG 1522 0.2%, Red-131 5%, PVP / VA64 4%, sodium benzoate 0.2%, water is added to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 6% tebuconazole seed treatment suspension.

[0036] Comparative Example 2-3.6% Tebuconazole seed treatment suspension

[0037] According to the formula requirements, tebuconazole 6%, gibberellin 0.01%, 1-naphthyl acetic acid 0.06%, TENSIOFIXAMS3034%, W-600 2%, magnesium aluminum silicate 1%, xanthan gum 0.2%, ethylene glycol 5%, SAG 1522 0.2%, Red-1315%, PVP / VA64 4%, sodium benzoate 0.2%, water is supplemented to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 6% tebuconazole seed treatment suspension.

[0038] Comparative Example 2-4.6% Tebuconazole seed treatment suspension

[0039] According to the formula requirements, tebuconazole 6%, gibberellin 0.01%, kinetin 0.08%, TENSIOFIX AMS3034%, W-600 2%, magnesium aluminum silicate 1%, xanthan gum 0.2%, ethylene glycol 5%, SAG 1522 0.2%, Red-131 5%, PVP / VA64 4%, sodium benzoate 0.2%, water is supplemented to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 6% tebuconazole seed treatment suspension.

[0040] Example 2 - 1.6% Tebuconazole Seed Treatment Suspension Concentrate

[0041] According to the formula requirements, tebuconazole 6%, gibberellin 0.01%, 1-naphthyl acetic acid 0.06%, kinetin 0.08%, TENSIOFIX AMS303 4%, W-600 2%, magnesium aluminum silicate 1%, xanthan gum 0.2%, ethylene glycol 5%, SAG15220.2%, Red-131 5%, PVP / VA64 4%, sodium benzoate 0.2%, water is added to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 6% tebuconazole seed treatment suspension.

[0042] Comparative Example 3-1.6% Tebuconazole seed treatment suspension

[0043] According to the formula requirements, tebuconazole 6%, SK-33SC 4%, 1601 2%, magnesium aluminum silicate 1%, xanthan gum 0.15%, ethylene glycol 5%, SAG 1522 0.2%, Red-131 5%, PVP / VA64 4%, sodium benzoate 0.2%, water is supplemented to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 6% tebuconazole seed treatment suspension.

[0044] Comparative Example 3-2.6% Tebuconazole seed treatment suspension

[0045] According to the formula requirements, 6% of tebuconazole, 0.02% of gibberellin, 4% of SK-33SC, 2% of 1601, 1% of magnesium aluminum silicate, 0.15% of xanthan gum, 5% of ethylene glycol, 0.2% of SAG 1522, 5% of Red-131, 4% of PVP / VA64, and 0.2% of sodium benzoate are added, and water is added to 100%. The materials are crushed by high shear treatment and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain a 6% tebuconazole seed treatment suspension. Comparative Example 3-3.6% tebuconazole seed treatment suspension

[0046] According to the formula requirements, tebuconazole 6%, gibberellin 0.02%, 3-indolebutyric acid 0.03%, SK-33SC 4%, 16012%, magnesium aluminum silicate 1%, xanthan gum 0.15%, ethylene glycol 5%, SAG 1522 0.2%, Red-131 5%, PVP / VA644%, sodium benzoate 0.2%, water is supplemented to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 6% tebuconazole seed treatment suspension.

[0047] Comparative Example 3-4.6% Tebuconazole seed treatment suspension

[0048] According to the formula requirements, tebuconazole 6%, gibberellin 0.02%, 6-benzylaminopurine 0.05%, SK-33SC 4%, 1601 2%, magnesium aluminum silicate 1%, xanthan gum 0.15%, ethylene glycol 5%, SAG 1522 0.2%, Red-131 5%, PVP / VA64 4%, sodium benzoate 0.2%, water is added to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 6% tebuconazole seed treatment suspension.

[0049] Example 3 - 1.6% Tebuconazole Seed Treatment Suspension Concentrate

[0050] According to the formula requirements, tebuconazole 6%, gibberellin 0.02%, 3-indolebutyric acid 0.03%, 6-benzylaminopurine 0.05%, SK-33SC 4%, 1601 2%, magnesium aluminum silicate 1%, xanthan gum 0.15%, ethylene glycol 5%, SAG 15220.2%, Red-131 5%, PVP / VA64 4%, sodium benzoate 0.2%, water is supplemented to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 8% tebuconazole seed treatment suspension.

[0051] Comparative Example 4-1. 10% Tebuconazole seed treatment suspension

[0052] According to the formula requirements, 10% tebuconazole, 4% SK-33SC, 2% EL-360, 1% Span-80, 1% magnesium aluminum silicate, 0.1% xanthan gum, 5% ethylene glycol, 0.2% SAG 1522, 8% Red-131, 6% PVP / VA64, 0.2% sodium benzoate, water is added to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand milling. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 10% tebuconazole seed treatment suspension. Comparative Example 4-2.10% tebuconazole seed treatment suspension

[0053] According to the formula requirements, 10% tebuconazole, 0.04% gibberellin, 4% SK-33SC, 2% EL-360, 1% Span-80, 1% magnesium aluminum silicate, 0.1% xanthan gum, 5% ethylene glycol, 0.2% SAG 1522, 8% Red-131, 46% PVP / VA, 0.2% sodium benzoate, water is added to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 10% tebuconazole seed treatment suspension.

[0054] Comparative Example 4-3. 10% Tebuconazole seed treatment suspension

[0055] According to the formula requirements, 10% tebuconazole, 0.04% gibberellin, 0.1% 1-naphthyl acetic acid, 4% SK-33SC, 2% EL-360, 1% Span-80, 1% magnesium aluminum silicate, 0.1% xanthan gum, 5% ethylene glycol, 0.2% SAG 1522, 18% Red-13, 6% PVP / VA64, 0.2% sodium benzoate, water is added to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 10% tebuconazole seed treatment suspension.

[0056] Comparative Example 4-4. 10% Tebuconazole seed treatment suspension

[0057] According to the formula requirements, 10% tebuconazole, 0.04% gibberellin, 0.1% chlorpyrifos, 4% SK-33SC, 2% EL-360, 1% Span-80, 1% magnesium aluminum silicate, 0.1% xanthan gum, 5% ethylene glycol, 0.2% SAG 1522, 18% Red-13, 6% PVP / VA64, 0.2% sodium benzoate, water is added to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 10% tebuconazole seed treatment suspension.

[0058] Example 4-1. 10% Tebuconazole Seed Treatment Suspension Concentrate

[0059] According to the formula requirements, 10% of tebuconazole, 0.04% of gibberellin, 0.1% of 1-naphthyl acetic acid, 0.1% of chlorpyrifos, 4% of SK-33SC, 2% of EL-360, 1% of Span-80, 1% of magnesium aluminum silicate, 0.1% of xanthan gum, 5% of ethylene glycol, 0.2% of SAG 1522, 8% of Red-131, 6% of PVP / VA64, and 0.2% of sodium benzoate are added, and water is added to 100%. The materials are crushed by high shear treatment and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 10% tebuconazole seed treatment suspension.

[0060] Comparative Example 5-1. 10% Tebuconazole seed treatment suspension

[0061] According to the formula requirements, 10% of tebuconazole, 4% of Atlox 4913, 2% of Atlas G-5000, 3% of SP-SC29, 1% of magnesium aluminum silicate, 0.1% of xanthan gum, 5% of ethylene glycol, 0.2% of SAG 1522, 8% of Red-131, 646% of PVP / VA, and 0.2% of sodium benzoate are added, and water is added to 100%. The materials are crushed by high shear treatment and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 10% tebuconazole seed treatment suspension.

[0062] Comparative Example 5-2. 10% Tebuconazole seed treatment suspension

[0063] According to the formula requirements, 10% tebuconazole, 0.06% gibberellin, 4% Atlox 4913, 2% Atlas G-5000, 3% SP-SC29, 1% magnesium aluminum silicate, 0.1% xanthan gum, 5% ethylene glycol, 0.2% SAG 1522, 8% Red-131, 6% PVP / VA64, 0.2% sodium benzoate, water is added to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 10% tebuconazole seed treatment suspension.

[0064] Comparative Example 5-3. 10% Tebuconazole seed treatment suspension

[0065] According to the formula requirements, 10% tebuconazole, 0.06% gibberellin, 0.08% 3-indolepropionic acid, 4% Atlox 4913, 2% Atlas G-5000, 3% SP-SC29, 1% magnesium aluminum silicate, 0.1% xanthan gum, 5% ethylene glycol, 0.2% SAG 1522, 8% Red-131, 6% PVP / VA64, 0.2% sodium benzoate, water is added to 100%, the materials are crushed by high shear treatment, and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 10% tebuconazole seed treatment suspension.

[0066] Comparative Example 5-4. 10% Tebuconazole seed treatment suspension

[0067] According to the formula requirements, 10% of tebuconazole, 0.06% of gibberellin, 0.1% of thidiazuron, 4% of Atlox 4913, 2% of AtlasG-5000, 3% of SP-SC29, 1% of magnesium aluminum silicate, 0.1% of xanthan gum, 5% of ethylene glycol, 0.2% of SAG 1522, 8% of Red-131, 6% of PVP / VA64, and 0.2% of sodium benzoate are added, and water is added to 100%. The materials are crushed by high shear treatment and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 10% tebuconazole seed treatment suspension.

[0068] Example 5-1. 10% Tebuconazole Seed Treatment Suspension Concentrate

[0069] According to the formula requirements, 10% of tebuconazole, 0.06% of gibberellin, 0.08% of 3-indolepropionic acid, 0.1% of thidiazuron, 4% of Atlox4913, 2% of Atlas G-5000, 3% of SP-SC29, 1% of magnesium aluminum silicate, 0.1% of xanthan gum, 5% of ethylene glycol, 0.2% of SAG 1522, 8% of Red-131, 6% of PVP / VA64, and 0.2% of sodium benzoate are added, and water is added to 100%. The materials are crushed by high shear treatment and then transferred to a sand mill for sand grinding. When the particle size reaches the standard, warning color and film-forming material are added and stirred evenly to obtain 10% tebuconazole seed treatment suspension.

[0070] Seed safety test

[0071] The seed coating agent in the above example was used to coat corn seeds, and the following properties were measured after coating.

[0072] The germination potential and germination rate of the above-obtained seed coating agent were measured, wherein germination refers to the appearance and growth of seedlings in the laboratory to a certain stage, and the main structure of the seedlings indicates whether they can further grow into normal plants under suitable conditions in the field. The germination potential refers to the germination trend, which is observed on the 4th day according to relevant standards, and the germination rate is the percentage of normal seedlings to the number of test seeds on the 7th day.

[0073] The experiment used sand as the germination bed. The sand particles were uniform in size, with a diameter of 0.05-0.80 mm. They were washed and sterilized at high temperature before use. The sand bed was made in the sand-in-sand method, that is, the seeds were sown on a layer of flat wet sand, and then covered with 10-20 mm thick loose sand according to the seed size.

[0074] Test conditions: day, 20℃, 12h; night, 20℃, 12h; humidity: 70%RH

[0075] Corn seeds: Xianyu 335

[0076] Table 1. Safety data of blank control and examples

[0077]

[0078] Field efficacy test

[0079] The experiment was conducted in a corn field in Yilaxi Town, Yongji County, Jilin City, Jilin Province. The field is a standard farmland in Yilaxi Town with flat terrain, and various agricultural and teaching extension experiments are carried out all year round. 55,000 seedlings are maintained per hectare, with a row spacing of 60 cm and a plant spacing of 26 cm. The tillage method adopts the conventional sowing and tillage method in Jilin.

[0080] Test target: Corn silk stigma

[0081] Test seeds: Xianyu 335

[0082] Application method: 100 g of the preparation prepared in the above example was used for coating per 10 kg of seeds, and the remainder was supplemented with water.

[0083] Table 2. Field control effectiveness test results

[0084]

[0085] It can be seen from the above comparative examples and embodiments that when no stress-resistant components are added to the tebuconazole seed coating formulation, the germination potential and germination rate of corn seeds are significantly inhibited; when only gibberellins or gibberellins and auxins or gibberellins and cytokinins are added to the formulation, the germination potential and germination rate of seeds are promoted to a certain extent, but there is still a certain gap compared with blank seeds; when gibberellins, cytokinins and auxins are used in combination, the germination potential and germination rate can reach the same level as blank seeds. From the results of the field prevention effect test, compared with the seed coating without adding stress-resistant components, the prevention effect is significantly improved after adding stress-resistant components.

Claims

1. A seed coating agent for resisting low temperature damage, active ingredients and adjuvants, characterized in that: The adjuvant contains stress-resistant components and wetting and dispersing agents; the stress-resistant components and wetting and dispersing agents account for 0.03% to 0.5% and 0.5% to 10% of the weight of the preparation respectively; the stress-resistant components are a mixture of gibberellins, auxins and cytokinins, wherein the weight percentage of gibberellins is 0.01% to 0.1%.

2. The seed coating agent for resisting low temperature damage according to claim 1, characterized in that: The auxin is selected from one of 3-indolebutyric acid, 3-indoleacetic acid, 1-naphthylacetic acid and 3-indolepropionic acid; wherein the ratio of gibberellin to auxin is 1:1 to 1:

10.

3. The seed coating agent according to claim 1, characterized in that: The cytokinin is selected from one of zeatin, kinetin (KT), 6-benzylaminopurine (6-BAP), chlorpyrifos (CPPU) and thidiazuron (TDZ); wherein the ratio of gibberellin to cytokinin is 1:1 to 1:

10.

4. The seed coating agent according to claim 1, characterized in that: The active component is tebuconazole, and the weight percentage of the active component in the seed coating agent is 2% to 10%.

5. The seed coating agent according to claim 1, characterized in that: The wetting and dispersing agent is one or more of anionic surfactant, nonionic surfactant and anionic and nonionic compound surfactant; and its weight percentage of the seed coating agent is 0.5% to 10%.

6. The seed coating agent according to claim 5, characterized in that: The anionic surfactant is one or more of sulfonates, sulfates, carboxylates, phosphates, and succinates; the nonionic surfactant is one or more of fatty alcohol polyoxyethylene ethers, alkylphenol polyoxyethylene ethers, fatty amine polyoxyethylene ethers, acid alcohol esters and their polyoxyethylene ethers, castor oil polyoxyethylene ethers, alkanolamides and their polyoxyethylene ethers, sodium alkylnaphthalene sulfonate fatty alcohol polyoxyethylene ethers, sorbitan fatty acid ester polyoxyethylene ethers, phenethylphenol polyoxyethylene polyoxypropylene ethers, and formaldehyde condensates; the anionic and nonionic compound surfactant is a mixture of one or more anionic surfactants and one or more nonionic surfactants.

7. The seed coating agent according to claim 1, characterized in that: The auxiliary agent is one or more of a thickener, a defoamer, a preservative and a warning color.

8. An application of the seed coating agent for resisting low temperature damage according to claim 1, characterized in that: The seed coating agent is used as corn seed coating in preventing and controlling corn head smut.

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