Rice seed treating agent and application thereof

Abstract

The invention relates to the technical field of rice seed treating agents, in particular to a rice seed treating agent and application thereof, the rice seed treating agent comprises an effective component A, an effective component B and an assistant, the effective component A is pydiflumetofen, the effective component B is ipconazole, the content of the component A is 1-9%, and the content of the component B is 3-20%. According to the invention, the pydiflumetofen and ipconazole are compounded, so that the safety of rice seed treatment is effectively improved, a very good prevention and treatment effect on bakanae disease germs carried on rice seeds is achieved, the prevention and treatment effect is outstanding, the germination rate of the seeds can be effectively ensured in a seed germination accelerating process, the emergence rate is excellent, and the application prospect is wide. The germination probability of bakanae disease germs is greatly reduced, and a very good prevention effect on the rice bakanae disease is achieved. The medicament disclosed by the invention is applied to prevention and treatment of the rice bakanae disease, effectively plays a good role in preventing the rice bakanae disease, is long in prevention and treatment effect time, causes few bakanae disease after growth and development of the rice, and greatly reduces the harm of the bakanae disease to the rice.

Description

Technical Field

[0001] This invention relates to the field of rice seed treatment agents, and in particular to a rice seed treatment agent and its application. Background Technology

[0002] Rice bakanae disease, also known as excessive growth disease, often results in rice grains failing to germinate or emerge from the soil after sowing. During the seedling stage, infected seedlings are thinner and taller than healthy seedlings, with long, thin leaves and sheaths, pale yellow leaves, and poor root development. Some infected seedlings die before transplanting. A pale red or white powdery mold, the conidia of the pathogen, is present on the dead seedlings. Under high humidity, the surface of dead plants becomes covered with a pale brown or white powdery mold, later developing into small black dots, the fungal cysts. Mildly infected plants exhibit premature heading, but the panicles are small and empty. Grains can also be affected during the heading stage; severely infected grains turn brown and fail to set grains. Pale red mold grows in the crevices of the glumes. Mild cases may not show symptoms, but mycelium may already be latent inside.

[0003] Rice bakanae disease is caused by *Fusarium jikuroi* (asexual stage), a type of asexual fungus. Conidia are of two types: microconidia are oval or flattened-elliptic, colorless, unicellular, and arranged in chains, measuring 4–6 × 2–5 μm. Macroconidia are mostly fusiform or sickle-shaped, with a blunt or uniformly thick apex, possessing 3–5 septa, measuring 17–28 × 2.5–4.5 μm. When many spores are aggregated, they appear pale red; when dry, they are pink or white. The sexual stage, *Gibberella jikuroi* (Saw.) Wr., is a fungus belonging to the Ascomycota. The ascocarps are bluish-black, spherical, with a rough surface, measuring 240–360 × 220–420 μm. The asci are cylindrical, narrow at the base and round at the top, containing 4 to 8 ascospores arranged in 1 to 2 rows. The ascospores are two-celled, colorless, oblong, slightly constricted at the septum, and 5.5 to 11.5 × 2.5 to 4.5 (μm) in size.

[0004] Infected seeds and diseased rice straw are the primary sources of infection for rice bakanae disease. During seed soaking, conidia from infected seeds contaminate healthy seeds, leading to infection. Severe cases cause seedling blight; conidia produced on dead seedlings spread to healthy seedlings, causing reinfection. After transplanting infected rice seedlings, the mycelium can spread throughout the entire plant under suitable conditions, stimulating excessive vegetative growth. During flowering, the pathogen spreads to the floral organs, invading the glumes and endosperm, causing shriveled or deformed grains, and producing a pale red powdery mildew at the glume sutures. Even if the pathogen invades late and the grains show no symptoms, the mycelium has already penetrated internally, making the seeds infected. Mixing infected seeds with diseased seeds during threshing can also contaminate healthy seeds.

[0005] The disease is more likely to occur when the soil temperature is 30-35℃, and wounds facilitate the invasion of pathogens; dry seedling raising is more prone to disease than water seedling raising; increased application of nitrogen fertilizer stimulates the development of the disease.

[0006] Currently, conventional pesticides on the market are relatively ineffective in controlling rice bakanae disease. Seed treatment can affect seed germination rate, and the fungicide is not effective against the pathogens causing rice bakanae disease. Rice plants also tend to grow excessively at a certain stage. Therefore, there is a need to develop a new rice seed treatment agent. Summary of the Invention

[0007] The purpose of this invention is to overcome the above-mentioned shortcomings of the prior art and to provide a treatment agent for the prevention and control of rice seed bakanae disease that is safe to use, has outstanding control effect against bakanae disease pathogens, and has a long-lasting effect, as well as its application.

[0008] The technical solution of the present invention is: a rice seed treatment agent, comprising active ingredients A, B and adjuvants, wherein active ingredient A is fluopyram, active ingredient B is cymoxanil, the content of ingredient A is 1-9%, and the content of ingredient B is 3-20%.

[0009] Furthermore, the content of component A is 2-7%, and the content of component B is 5-15%.

[0010] Furthermore, the content of component A is 6%, and the content of component B is 10%.

[0011] This invention uses a combination of fluopyram and tebuconazole, which effectively ensures the safety of seed treatment. It inhibits the respiration of pathogens while destroying the cell membrane of bakanae disease pathogens. The two have a good synergistic effect and have systemic, protective and curative effects, effectively ensuring the duration of effectiveness against pathogens.

[0012] Furthermore, the rice seed treatment agent is formulated as one of seed coating agents, treatment suspensions, seed treatment emulsions, or seed treatment liquids.

[0013] Furthermore, the additives include 0.5-3% dispersant, 1-4% wetting agent, 1-4% emulsifier, 2-8% antifreeze, 0.1-1% thickener, 0.1-1% preservative, 2-8% film-forming agent, 2-6% dyeing agent, and the balance being a carrier.

[0014] Furthermore, the additives include 1.5% dispersant, 2% wetting agent, 2% emulsifier, 4% antifreeze, 0.2% thickener, 0.2% preservative, 4% film-forming agent, and 3% dyeing agent, with the carrier made up to 100%.

[0015] Furthermore, the dispersant is one of dispersant NNO, alkyl aryl sulfonate, alkylphenol polyoxyethylene ether, and sodium polycarboxylate; The wetting agent is any one or more of the following: calcium lignosulfonate, sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, alkylnaphthalene sulfonate, alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, lauryl alcohol polyoxyethylene ether sulfate, and alkylphenol polyoxyethylene ether formaldehyde condensate sodium succinate sulfonate. The emulsifier is one or more of the following: poloxamer 188, op-10 emulsifier, TX-10 emulsifier, np-10 emulsifier, 305 emulsifier, and op emulsifier; The thickener is one or a mixture of more than one of xanthan gum, magnesium aluminum silicate, and starch; The antifreeze is at least one of ethylene glycol, propylene glycol, glycerol, polyethylene glycol, and sorbitol; The preservative is one of sodium benzoate, sodium diacetate, or tartaric acid. The film-forming agent is at least one of polyvinyl alcohol, polyvinylpyrrolidone, polyethylene glycol, polyvinyl acetate, polypropylene, polyurethane, or sodium carboxymethyl cellulose. The staining agent is one or more of Solvent Red 23, Basic Rose Red, Water-based Rose Red, Acid Red, Fluorescein Red 5B, Red-8110, Red-131, or FGR-131.

[0016] An application of a rice seed treatment agent, wherein the above-mentioned rice seed treatment agent is used to treat rice seeds, and the rice seed treatment agent is a suspension agent used to prevent and control rice bakanae disease.

[0017] Furthermore, the suspension agent is used to coat rice seeds. The dosage of the suspension agent is 100-200 ml / 100 kg of seeds. When using it, the suspension agent is diluted with 1-2 L of water to treat 100 kg of seeds.

[0018] Furthermore, the suspension is a 6% fluopyram • 10% tebuconazole seed treatment suspension.

[0019] The principle of this invention: Fluopyram is an SDHI fungicide, which is an inhibitor of pathogenic respiration. It inhibits mitochondrial function by interfering with the tricarboxylic acid cycle on respiratory electron transport complex II, preventing energy production, inhibiting pathogen growth, and ultimately leading to the death of pathogens. Fluopyram has broad-spectrum, systemic, and highly effective fungicidal properties, and can be used to prevent and control diseases caused by various pathogens such as Alternaria and Fusarium.

[0020] Smectin, with its mechanism of action being the inhibition of ergosterol synthesis within pathogenic fungi and disruption of cell membrane structure, exhibits systemic, protective, and curative effects. As a seed treatment agent, smectin can control rice bakanae disease, rice blast, and seedling diseases in maize. It is also included in the recommended emergency control treatment for wheat stem rot, and is applied through seed coating or seed dressing. By inhibiting ergosterol biosynthesis in pathogenic fungi and interfering with the formation of cell membrane sterol components, it inhibits mycelial growth, ultimately achieving a fungicidal effect. This mechanism gives it a systemic control function, combining preventative and curative effects.

[0021] This invention has the following characteristics: 1. This invention combines fluopyram and tebuconazole, which effectively improves the safety of rice seed treatment and has a good control effect on the bakanae disease pathogen carried on rice seeds. The control effect is outstanding, and the germination rate is effectively guaranteed during the seed germination process. The seedling emergence rate is excellent, and the probability of bakanae disease pathogen germination is greatly reduced, thus playing a good role in preventing rice bakanae disease.

[0022] 2. This invention combines fluopyram and tebuconazole for the prevention and control of rice bakanae disease. It is used to coat rice seeds, which effectively prevents rice bakanae disease and has a long-lasting effect. The occurrence of bakanae disease is very low after the rice grows and develops, which greatly reduces the damage of bakanae disease to rice.

[0023] 3. This invention combines fluopyram and cyproconazole, which greatly improves the resistance management of rice bakanae disease. Due to the multiple action sites, it greatly increases the difficulty for the pathogen to simultaneously produce resistance mutations against the two agents, significantly delaying the emergence and development of resistance and extending the effective service life of the compound product.

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0025] Figure 1 —This is a graph showing the original data of seedling emergence rate in the field trial of the agent of this invention; Figure 2 —This is a graph showing the original data on the control effect of the pesticide in the field trial of the seedling field of the present invention; Figure 3 —This is a graph showing the original data of the field control effect of the agent in the field trial of this invention. Detailed Implementation

[0026] Example 1

[0027] A rice seed treatment agent includes active ingredients A and B, and adjuvants. Active ingredient A is fluopyram, and active ingredient B is tebuconazole. The content of ingredient A is 6%, and the content of ingredient B is 10%. The formulation of the rice seed treatment agent is a treatment suspension. The adjuvants include 1.5% dispersant, 2% wetting agent, 2% emulsifier, 4% antifreeze agent, 0.2% thickener, 0.2% preservative, 4% film-forming agent, and 3% dye. The carrier is made up to 100%. The dispersant is NNO, the wetting agent is calcium lignosulfonate, the emulsifier is poloxamer 188, the thickener is a 1:1 mixture of xanthan gum and magnesium aluminum silicate, the antifreeze is ethylene glycol, the preservative is sodium benzoate, the film-forming agent is polyvinyl alcohol, and the dye is Solvent Red 23.

[0028] Example 2

[0029] A rice seed treatment agent includes active ingredients A and B, and adjuvants. Active ingredient A is fluopyram, and active ingredient B is tebuconazole. The content of ingredient A is 2%, and the content of ingredient B is 4%. The formulation of the rice seed treatment agent is a seed coating agent. The adjuvants include 0.6% dispersant, 1.2% wetting agent, 1.5% emulsifier, 2.1% antifreeze, 0.2% thickener, 0.2% preservative, 3% film-forming agent, 3% dye, and the balance being a carrier, with the carrier being water to make up to 100%. The dispersant is alkyl aryl sulfonate, the wetting agent is sodium dodecyl sulfate, the emulsifier is OP-10 emulsifier, the thickener is magnesium aluminum silicate, the antifreeze is propylene glycol, the preservative is sodium diacetate, the film-forming agent is polyvinylpyrrolidone, and the dye is a 1:1 mixture of basic rose essence and water-based rose red.

[0030] Example 3

[0031] A rice seed treatment agent includes active ingredients A and B, and adjuvants. Active ingredient A is fluopyram, and active ingredient B is tebuconazole. The content of ingredient A is 8.5%, and the content of ingredient B is 14%. The rice seed treatment agent is in the form of a seed treatment liquid. The adjuvants include 2.5% dispersant, 3.5% wetting agent, 3.5% emulsifier, 7% antifreeze agent, 0.9% thickener, 0.81% preservative, 7.5% film-forming agent, 5% dye, and the balance being a carrier, with the carrier being water to make up to 100%. The dispersant is a 1:1 mixture of alkylphenol polyoxyethylene ether and sodium polycarboxylate; the wetting agent is a 1:1 mixture of sodium dodecylbenzenesulfonate and alkylnaphthalene sulfonate; the emulsifier is a 1:1 mixture of TX-10 emulsifier and NP-10 emulsifier; the thickener is starch; the antifreeze agent is polyethylene glycol; the preservative is tartaric acid; the film-forming agent is polyvinyl acetate; and the dye is Red-8110.

[0032] Example 4

[0033] A rice seed treatment agent includes active ingredients A and B, and adjuvants. Active ingredient A is fluopyram, and active ingredient B is tebuconazole. The content of ingredient A is 5%, and the content of ingredient B is 15%. The formulation of the rice seed treatment agent is a seed treatment emulsion. The adjuvants include 2% dispersant, 2% wetting agent, 2% emulsifier, 4% antifreeze, 0.4% thickener, 0.5% preservative, 5% film-forming agent, 3% dye, and the balance being a carrier, with the carrier being water to make up to 100%. The dispersant is NNO, the wetting agent is a 1:1 mixture of calcium lignosulfonate and sodium lauryl polyoxyethylene ether sulfate, the emulsifier is a 1:2 mixture of 305 emulsifier and OP emulsifier, the thickener is a 1:1 mixture of xanthan gum and magnesium aluminum silicate, the antifreeze is a 1:1 mixture of ethylene glycol and propylene glycol, the preservative is a 1:1 mixture of sodium benzoate and sodium diacetate, the film-forming agent is a 2:1 mixture of polyethylene glycol and polypropylene, and the dye is Solvent Red 23.

[0034] Example 5

[0035] Fluopyram is a pyrazole carboxamide fungicide with a mechanism of action as a succinate dehydrogenase inhibitor (SDHI). Fluopyram can control seedling diseases caused by higher fungi (such as Fusarium). When used at the recommended dosage, it is safe for seeds and seedlings. Izoxystrobin is an ergosterol biosynthesis inhibitor with systemic, protective, and curative effects. To delay the development of resistance and increase control efficacy, the combined activity of the two agents will be tested.

[0036] According to relevant experimental guidelines, the indoor biological activity of fluopyram and tebuconazole combined with rice bakanae disease pathogens was tested using the plate method (to inhibit the growth of pathogenic fungal hyphae) to determine the appropriate ratio of the two mixtures to have good toxicity activity against rice bakanae disease pathogens.

[0037] Materials and Methods: Test reagents: 97% cymoxanil technical grade, 98% fluopyram technical grade.

[0038] Prepare the following proportions:

[0039] The test target, *Fusarium moniliforme*, was provided by the College of Plant Protection, Hunan Agricultural University. The strain was activated and stored in a refrigerator for later use.

[0040] Experimental treatments and methods, solutions and preparation: Concentration setting: Weigh the test drug and perform serial dilution with a small amount of acetone or sterile water. Set 7-10 concentrations for the preliminary test and 5 concentrations for the final test, with each concentration repeated 3 times.

[0041] Experimental method: mycelial growth rate method (NY / T1156.2—2006). Rice bakanae disease pathogen strain was cultured on PDA plates. After culturing for 2 days, the edges of the colonies were cleaned with a punch (to ensure uniform viability of the inoculated blocks) and the blocks were broken into 4mm diameter blocks for inoculation.

[0042] The test reagents were prepared using a serial dilution method to establish a series of concentration gradients. A 10-fold concentration solution of the test reagent was prepared, and then this solution was diluted 10-fold with PDA medium (the solution and medium were mixed at a 1:9 ratio in an Erlenmeyer flask, and then the same amount of medium was poured into each petri dish) to prepare plates with different concentrations of the reagent. A PDA plate without the reagent served as a control (1 mL sterile water, 9 mL medium, plate preparation as before). Each treatment was repeated three times. After the plates solidified, a 4 mm diameter *Bakanaeda oryzae* inoculum was placed in the center of each plate and incubated at 25°C for 5 days. The plates were then simultaneously removed, and the colony diameter (average of the major and minor axes) was measured. The colony expansion diameter was calculated by subtracting the inoculum diameter from the colony diameter, and the growth inhibition rate was calculated.

[0043] Data with inhibition rates between 16% and 84% were used to calculate the toxicity regression equations, EC50, EC90, and correlation coefficients for each drug. These were used to evaluate the drug's biological activity against the target.

[0044] Data Statistics and Analysis Calculation method: Inhibition rate (%) = ((mean diameter of colony expansion in control treatment - mean diameter of colony expansion in drug treatment) / mean diameter of colony expansion in control treatment) * 100 Data analysis was performed using SPSS statistical analysis software.

[0045] The test results show that the EC50 values ​​of the two fungicides against rice bakanae disease pathogens are as follows: 97% cyproconazole technical (EC50=0.1243mg / kg) < 98% fluopyram technical (EC50=4.4159mg / kg).

[0046]

[0047] As shown in Table 1 of the experimental results, the synergistic values ​​(SR) of formulations 1#-5# made from the two active ingredients in different proportions are 0.6441, 1.1716, 1.5775, 1.3694, and 1.0620, respectively. The synergistic values ​​of formulations 1#, 2#, 4#, and 5# are all between 0.5 and 1.5, indicating an additive effect. Only formulation 3# has a synergistic value greater than 1.5, demonstrating a synergistic effect. Therefore, the two active ingredients, when combined in formulations 1#-5#, all exhibit some toxicity against the rice bakanae disease pathogen, with formulation 3# (3:5) showing the best effect.

[0048] Example 6

[0049] An application of a rice seed treatment agent was conducted, using the rice seed treatment agent 6% fluopyram·10% cymoxanil suspension from Example 1 above, to control rice bakanae disease. A field trial was performed, using the commercially available agent 11% metalaxyl·fluopyrazosulfuron·pyraclostrobin seed treatment suspension as a control agent. The dosage of the suspension was 100-200 ml / 100 kg of seeds. When using, the suspension was diluted with 1-2 L of water to treat 100 kg of seeds, and a blank control was set up. The proportions of the components in the control agent were: metalaxyl 3.3%, fluopyrazosulfuron 1.1%, and pyraclostrobin 6.6%.

[0050] The experiment was conducted in Changsha, Hunan Province, using Huanghuazhan rice seeds. The experiment took place on June 27, 2024, during the late rice season. The survey method involved sampling at five diagonal points, with three replicates for each treatment. At each point, 100 plants were used to investigate the total number of seedlings and the number of diseased seedlings. The dosage of the experimental agent was 100-200 ml / 100 kg of seeds. The suspension was diluted with 2 L of water to treat 100 kg of seeds. The efficacy was investigated at three stages: rice emergence rate, seedling bed efficacy, and field efficacy. Seedling bed efficacy was investigated 20 days after sowing, and field efficacy was investigated 60 days after transplanting. Data were collected, and the average efficacy was calculated.

[0051] Data Statistics and Analysis Emergence rate (%) = Number of seedlings × 100 / Number of seeds sown (%); Disease rate (%) = Number of diseased seedlings investigated × 100 / Total number of seedlings investigated; Control effect (%) = (CK - PT) × 100 / CK; CK: Disease rate in blank control; PT: Disease rate in pesticide-treated seedlings.

[0052] The experimental results are shown in Table 2 below:

[0053] As shown in Table 2, the experimental results of this invention (6% fluopyram • 10% cymoxanil) effectively ensured the germination and emergence rate of rice seeds after treatment. Compared with the blank control, the emergence rate of rice seeds was significantly higher, indicating that the agent of this invention has a certain promoting and enhancing effect on the emergence rate of rice seeds. Compared with the control agent, it is significantly better than the conventional agent in treating rice seeds. Furthermore, after the seedbed survey, the control effect on rice bakanae disease was significantly better than that of the control agent, with a longer residual effect. After the later field survey, the overall control effect was significantly better than that of the control agent on rice plants. The agent of this invention has a good control effect on rice bakanae disease and a good residual effect after treating rice seeds, and can play a good protective role for the growth and development of rice seeds and rice plants.

[0054] Example 7

[0055] An application of a rice seed treatment agent was conducted, using the rice seed treatment agent 6% fluopyram • 10% cymoxanil suspension from Example 1 above to control rice bakanae disease. Field safety tests were carried out, with the dosage of the suspension being 200 ml / 100 kg of seeds. When using the suspension, 1 L of water was diluted to treat 100 kg of seeds, and a blank control was set up.

[0056] For field preparation, select flat and fertile fields, level them, divide them into evenly sized plots, set up isolation zones around the fields, and number each plot. The test time is the same as in Example 6, and the test investigation methods are all in accordance with national standards.

[0057] Rice seed selection: glutinous rice, indica rice and japonica rice, the three varieties are Xiangnuo 28, Xiangzaoxian 32 and Daohuaxiang 6 respectively; Four concentration gradients were set up for the experiment, with three replicates for each treatment. Based on the conventional treatment of 100 kg of seeds with a maximum dose of 200 ml diluted in 1 L of water, a doubling experiment was conducted, with 1x, 1.5x, 2x, and 2.5x doses. Germination rate, germination inhibition rate, root length inhibition rate, emergence rate, emergence inhibition rate, seedling height, and fresh weight were randomly collected after each treatment. Root length was measured 7 days after germination, fresh weight was measured 14 days after pre-germination and sowing, and seedling height was measured 28 days after pre-germination and sowing. Data were collected and the average values ​​for each treatment were calculated. The experimental results are shown in Tables 3 and 4 below.

[0058] As can be seen from the above, the agent of the present invention has a significant promoting effect on the germination rate of rice seeds, and also has a certain promoting effect on the growth of plant roots. It is safe to use for the germination of rice seeds.

[0059]

[0060] As shown in Table 4, after treating three different varieties of rice seeds with the agent of this invention, the rice seedling emergence rate, seedling height, and fresh weight were normal, with no obvious inhibitory effect. Moreover, it had a certain promoting effect on the growth of rice plants. Especially when used at the recommended dosage, the promoting effect on rice plants was particularly obvious. The fresh weight of Xiangnuo 28 and Daohuaxiang 6 was promoted by more than 10%, with outstanding promoting effect. During the experiment, the plants in each plot grew normally, with no obvious abnormalities such as deformity, yellowing, or wilting.

[0061] This invention combines fluopyram and tebuconazole, effectively ensuring the safety of rice seed treatment and providing excellent control against the bakanae disease pathogen carried on rice seeds. The control effect is outstanding, effectively ensuring high germination and emergence rates during seed germination, significantly reducing the germination probability of the bakanae disease pathogen, and playing a significant role in preventing rice bakanae disease. Applying the combination of fluopyram and tebuconazole to the control of rice bakanae disease, through seed coating treatment, effectively prevents the disease, provides long-lasting control, and minimizes the occurrence of bakanae disease after rice growth and development, greatly reducing the damage to rice. This invention, by combining fluopyram and tebuconazole, will greatly improve the resistance management of rice bakanae disease because the multiple action sites significantly increase the difficulty for the pathogen to simultaneously develop resistance mutations against both agents, significantly delaying the emergence and development of resistance, and extending the effective service life of the compound product.

[0062] The preferred embodiments of the present invention have been described in detail above, but it is obvious that the present invention is not limited to the above embodiments. Within the scope of the technical concept of the present invention, various equivalent modifications can be made to the technical solutions of the present invention, and these equivalent modifications all fall within the protection scope of the present invention. Furthermore, it should be noted that the various technical features described in the above specific embodiments can be combined independently, as long as they fall within the scope of the technical concept of the present invention.

Claims

1. A rice seed treatment agent, characterized in that... It includes active ingredients A and B and adjuvants. Active ingredient A is fluopyram, and active ingredient B is cymoxanil. The content of ingredient A is 1-9%, and the content of ingredient B is 3-20%.

2. The rice seed treatment agent according to claim 1, characterized in that: The content of component A is 2-7%, and the content of component B is 5-15%.

3. The rice seed treatment agent according to claim 1, characterized in that: The content of component A is 6%, and the content of component B is 10%.

4. The rice seed treatment agent according to claim 1, characterized in that: The rice seed treatment agent is formulated as one of the following: seed coating agent, treatment suspension, seed treatment emulsion, or seed treatment liquid.

5. The rice seed treatment agent according to claim 1, characterized in that: The additives include 0.5-3% dispersant, 1-4% wetting agent, 1-4% emulsifier, 2-8% antifreeze, 0.1-1% thickener, 0.1-1% preservative, 2-8% film-forming agent, 2-6% dye, and the balance being carrier.

6. The rice seed treatment agent according to claim 1, characterized in that: The additives include 1.5% dispersant, 2% wetting agent, 2% emulsifier, 4% antifreeze, 0.2% thickener, 0.2% preservative, 4% film-forming agent and 3% dyeing agent, with the carrier made up to 100%.

7. The rice seed treatment agent according to claim 1, characterized in that: The dispersant is one of dispersant NNO, alkyl aryl sulfonate, alkylphenol polyoxyethylene ether and sodium polycarboxylate; The wetting agent is any one or more of the following: calcium lignosulfonate, sodium dodecyl sulfate, sodium dodecylbenzene sulfonate, alkylnaphthalene sulfonate, alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, lauryl alcohol polyoxyethylene ether sulfate, and alkylphenol polyoxyethylene ether formaldehyde condensate sodium succinate sulfonate. The emulsifier is one or more of the following: poloxamer 188, op-10 emulsifier, TX-10 emulsifier, np-10 emulsifier, 305 emulsifier, and op emulsifier; The thickener is one or a mixture of more than one of xanthan gum, magnesium aluminum silicate, and starch; The antifreeze is at least one of ethylene glycol, propylene glycol, glycerol, polyethylene glycol, and sorbitol; The preservative is one of sodium benzoate, sodium diacetate, or tartaric acid. The film-forming agent is at least one of polyvinyl alcohol, polyvinylpyrrolidone, polyethylene glycol, polyvinyl acetate, polypropylene, polyurethane, or sodium carboxymethyl cellulose. The staining agent is one or more of Solvent Red 23, Basic Rose Red, Water-based Rose Red, Acid Red, Fluorescein Red 5B, Red-8110, Red-131, or FGR-131.

8. The application of a rice seed treatment agent, wherein rice seeds are treated with the rice seed treatment agent according to any one of claims 1-7, characterized in that: Rice seed treatment agents are suspensions used to prevent and control rice bakanae disease.

9. The application of the rice seed treatment agent according to claim 8, characterized in that: The suspending agent is used to coat rice seeds. The dosage of the suspending agent is 100-200 ml / 100 kg of seeds. When using it, the suspending agent is diluted with 1-2 L of water to treat 100 kg of seeds.

10. The application of the rice seed treatment agent according to claim 8, characterized in that: The suspension is a 6% fluopyram·10% tebuconazole seed treatment suspension.

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