Flufenacet and bensulfuron methyl paddy field herbicide composition as well as preparation method and application thereof

Abstract

The invention relates to the technical field of pesticides, in particular to a flufenacet and bensulfuron methyl paddy field herbicide composition as well as a preparation method and application thereof. The herbicide composition comprises flufenacet, bensulfuron methyl, an auxiliary agent and an organic solvent, the method comprises the following steps: obtaining a flufenacet active compound, a bensulfuron methyl active compound and an auxiliary agent, and respectively crushing the flufenacet active compound and the bensulfuron methyl active compound through crushing equipment; adding the weighed flufenacet into the organic solvent, stirring until the flufenacet is dissolved, and adding the weighed bensulfuron methyl; sequentially adding an emulsifier, a dispersant and a stabilizer into the mixture, and stirring and mixing to obtain a mixed material; feeding the mixed material into an ultrafine grinder; adding a proper amount of deionized water into the crushed material, stirring to form a plastic material, and feeding the plastic material into an extrusion granulator for granulation; screening the dried particles through a screening machine; in this way, the effects of being wide in weeding spectrum, remarkable in synergism, safe to rice and afterreap crops and environmentally friendly are achieved.

Description

Combination of fluthiamethoxam and bensulfuron-methyl herbicides in paddy fields: preparation method and application Technical Field

[0001] This invention relates to the field of pesticide technology, and in particular to a combination of fluthiamethoxam and bensulfuron-methyl as a herbicide for paddy fields, its preparation method, and its application. Background Technology

[0002] Rice, as a major food crop in my country, has its yield and quality directly related to national food security. Weeds in paddy fields compete for water, nutrients, and sunlight, and are a key factor restricting high-yield and high-quality rice production. In severe cases, they can lead to yield reductions of over 30%. Fluthiamethoxam, an oxyacetanilide herbicide, works by inhibiting weed cell division and growth, showing significant efficacy against barnyard grass and other grassy weeds. Bensulfuron-methyl, a selective systemic herbicide, effectively controls broadleaf weeds and sedges such as duckweed and sedge. Combining these two herbicides can achieve complementary weed control spectrums and improve overall weed control effectiveness.

[0003] However, existing compound herbicides still have shortcomings in terms of component compatibility and preparation process stability. Some preparation methods have not properly controlled the dissolution and dispersion conditions of the active ingredient and the order of adjuvant addition, resulting in unstable product efficacy and short shelf life.

[0004] In conclusion, it is essential to propose a combination and preparation method of fluthiamethoxam and bensulfuron-methyl herbicides that has a broad spectrum of weed control, significant synergistic effects, safety for rice and subsequent crops, and environmental friendliness. Summary of the Invention

[0005] The purpose of this invention is to provide a combination of fluthiamethoxam and bensulfuron-methyl for paddy fields, along with its preparation method and application, achieving the goals of broad-spectrum weed control, significant synergistic effect, safety for rice and subsequent crops, and environmental friendliness.

[0006] To achieve the above objectives, the present invention employs a combination of fluthiamethoxam and bensulfuron-methyl for paddy fields, comprising fluthiamethoxam, bensulfuron-methyl, adjuvants, and organic solvents. The adjuvants include emulsifiers, dispersants, and stabilizers, wherein the emulsifier is sodium dodecylbenzenesulfonate, the dispersant is polyoxyethylene tristyrene phenyl phosphate, the stabilizer is epoxidized soybean oil, and the organic solvent is xylene.

[0007] The process involves obtaining fluthiamethoxam technical grade, bensulfuron technical grade, and adjuvants. Fluthiamethoxam and bensulfuron technical grade are pulverized separately using a pulverizing device. Pretreated fluthiamethoxam, bensulfuron, and adjuvants are weighed according to weight ratios. The weighed fluthiamethoxam is added to an organic solvent and stirred until dissolved. The weighed bensulfuron is then added, and stirring continues until the system is uniformly dispersed. Emulsifiers, dispersants, and stabilizers are added sequentially to the mixture and stirred to obtain a mixture. The mixture is then fed into an ultrafine pulverizer, and the pulverizing pressure is adjusted to 0.6~0.8 MPa, pulverizing until the particle size reaches 300~400 mesh. An appropriate amount of deionized water is added to the pulverized material, and the mixture is stirred until a plastic material is formed. This material is then fed into an extrusion granulator for granulation. The dried granules are sieved through a screening machine to remove unqualified granules that do not meet the size requirements. The qualified granules are then weighed and packaged to obtain the finished product.

[0008] In the process of obtaining fluthiamethoxam technical, bensulfuron technical, and adjuvants, and pulverizing fluthiamethoxam technical and bensulfuron technical separately using pulverizing equipment: the pulverized fluthiamethoxam technical and bensulfuron technical are screened for impurities to remove particles exceeding the size limit and impurity particles; the screened technicals and adjuvants are dried to control the moisture content to ≤1%; the dried technicals and adjuvants are classified, sealed, and stored, and key information such as batch and content of each raw material is recorded to establish a raw material traceability file; the fluthiamethoxam technical and bensulfuron technical are pulverized to 200-300 mesh using pulverizing equipment.

[0009] In the steps of weighing pretreated fluthiamethoxam, bensulfuron-methyl, and adjuvants according to weight ratio, adding the weighed fluthiamethoxam to an organic solvent and stirring until dissolved, adding the weighed bensulfuron-methyl, and continuing to stir until the system is uniformly dispersed: the organic solvent is preheated to 30~40℃, the weighed fluthiamethoxam is added to the organic solvent, heated to 50~60℃, and continuously stirred until the fluthiamethoxam is completely dissolved; the solution temperature is monitored in real time during the dissolution process, and the temperature fluctuation does not exceed ±2℃; after adding bensulfuron-methyl, a gradient stirring method is used, first stirring at a low speed for 5 minutes, and then gradually increasing the speed to 200 rpm.

[0010] In the step of adding emulsifier, dispersant, and stabilizer to the mixture in sequence and stirring to obtain the mixture material: the mixture is heated to 40~50℃ to melt, and the emulsifier, dispersant, and stabilizer are added in sequence; after each addition of an additive, the mixture is stirred at a speed of 200~300 rpm for 10~15 minutes; during the stirring process, the state of the mixture system is sampled regularly to observe whether there is any separation or precipitation; after the mixing is completed, the viscosity of the material is tested and controlled within the range of 500~800 mPa·s.

[0011] The process of adding an appropriate amount of deionized water to the pulverized material, stirring until a plastic material is formed, and then feeding it into an extrusion granulator for granulation involves the following steps: adding deionized water to the pulverized material in batches, with each batch not exceeding 5% of the total weight of the material; continuously stirring during the water addition process, gradually adjusting the stirring speed to 300-400 rpm to form a plastic material; feeding it into the extrusion granulator for granulation, controlling the particle size to 0.8-1.2 mm; and then feeding the granulated particles into a dryer for drying at 60-80℃ for 2-3 hours until the particle moisture content is ≤3%.

[0012] This invention also provides an application of a combination of fluthiamethoxam and bensulfuron-methyl herbicides for weed control in paddy fields.

[0013] This invention discloses a combination of fluthiamethoxam and bensulfuron-methyl herbicides for paddy fields, its preparation method, and its application. The method involves the following steps using fluthiamethoxam, bensulfuron-methyl, adjuvants, and an organic solvent: obtaining fluthiamethoxam technical grade, bensulfuron-methyl technical grade, and adjuvants; pulverizing the fluthiamethoxam and bensulfuron-methyl technical grades separately using a pulverizing device; weighing the pretreated fluthiamethoxam, bensulfuron-methyl, and adjuvants according to weight ratios; adding the weighed fluthiamethoxam to the organic solvent and stirring until dissolved; adding the weighed bensulfuron-methyl and continuing stirring until the system is uniformly dispersed; and sequentially adding an emulsifier, dispersant, and stabilizer to the mixture. The mixture is stirred and mixed to obtain a mixture; the mixture is then fed into an ultrafine pulverizer, and the pulverizing pressure is adjusted to 0.6~0.8MPa, pulverizing until the particle size reaches 300~400 mesh; an appropriate amount of deionized water is added to the pulverized material, and it is stirred until a plastic material is formed, which is then fed into an extrusion granulator for granulation; the dried granules are sieved through a screening machine to remove unqualified granules that do not meet the particle size requirements, and the qualified granules are weighed and packaged to obtain the finished product; through the above method, the effects of broad-spectrum weed control, significant efficiency enhancement, safety for rice and subsequent crops, and environmental friendliness are achieved. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 is a flowchart of the preparation method of the combination of fluthiamethoxam and bensulfuron-methyl for paddy fields according to the present invention.

[0016] Figure 2 is a flowchart of steps S100 of the present invention.

[0017] Figure 3 is a flowchart of steps S200 of the present invention.

[0018] Figure 4 is a flowchart of steps S300 of the present invention.

[0019] Figure 5 is a flowchart of the steps of S500 of the present invention. Detailed Implementation

[0020] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0021] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0022] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0023] This invention provides a combination of fluthiamethoxam and bensulfuron-methyl herbicides for paddy fields, comprising fluthiamethoxam, bensulfuron-methyl, adjuvants, and organic solvents. The adjuvants include emulsifiers, dispersants, and stabilizers, wherein the emulsifier is sodium dodecylbenzenesulfonate, the dispersant is polyoxyethylene tristyrene phenyl phosphate, the stabilizer is epoxidized soybean oil, and the organic solvent is xylene.

[0024] Please refer to Figures 1 to 5. The present invention also provides a method for preparing a combination of fluthiamethoxam and bensulfuron-methyl herbicides for paddy fields, comprising the following steps: S100: Obtain fluthiamethoxam technical, bensulfuron-methyl technical and adjuvants, and pulverize fluthiamethoxam technical and bensulfuron-methyl technical respectively by pulverizing equipment.

[0025] In this embodiment, fluthiamethoxam technical, bensulfuron technical, and adjuvants are obtained. Fluthiamethoxam technical and bensulfuron technical are pulverized separately using a pulverizing device. The specific process is as follows: S101: The pulverized fluthiamethoxam technical and bensulfuron technical are screened for impurities to remove particles that exceed the size limit and impurity particles; S102: The screened technical and adjuvants are dried separately to control the moisture content to ≤1%; S103: The dried technical and adjuvants are classified, sealed, and stored, and key information such as batch and content of each raw material is recorded to establish a raw material traceability file; S104: Fluthiamethoxam technical and bensulfuron technical are pulverized to 200-300 mesh using a pulverizing device.

[0026] In the above process, firstly, the pulverized fluthiamethoxam technical and bensulfuron technical are screened for impurities to remove particles that exceed the size limit and impurity particles; then, the screened technical and adjuvants are dried to control the moisture content to ≤1%; then, the dried technical and adjuvants are classified, sealed and stored, and key information such as batch and content of each raw material is recorded to establish a raw material traceability file; then, the fluthiamethoxam technical and bensulfuron technical are pulverized to 200~300 mesh using pulverizing equipment.

[0027] S200: Weigh the pretreated fluthiamethoxam, bensulfuron-methyl, and adjuvants according to the weight ratio. Add the weighed fluthiamethoxam to the organic solvent and stir until dissolved. Add the weighed bensulfuron-methyl and continue stirring until the system is uniformly dispersed.

[0028] In this embodiment, pretreated fluthiamethoxam, bensulfuron-methyl, and adjuvants are weighed according to the weight ratio. The weighed fluthiamethoxam is added to an organic solvent and stirred until dissolved. The weighed bensulfuron-methyl is then added, and stirring continues until the system is uniformly dispersed. The specific process is as follows: S201: The organic solvent is preheated to 30~40℃. The weighed fluthiamethoxam is added to the organic solvent, heated to 50~60℃, and stirred continuously until the fluthiamethoxam is completely dissolved. S202: The solution temperature is monitored in real time during the dissolution process, and the temperature fluctuation does not exceed ±2℃. S203: After adding bensulfuron-methyl, a gradient stirring method is used. First, the stirring speed is low for 5 minutes, and then the speed is gradually increased to 200 rpm.

[0029] In the above process, the organic solvent is first preheated to 30~40℃, the weighed fluthiamethoxam is added to the organic solvent, heated to 50~60℃, and continuously stirred until the fluthiamethoxam is completely dissolved; the solution temperature is monitored in real time during the dissolution process, and the temperature fluctuation does not exceed ±2℃; then bensulfuron-methyl is added and a gradient stirring method is used, first stirring at low speed for 5 minutes, and then gradually increasing the speed to 200 rpm.

[0030] S300: Emulsifier, dispersant and stabilizer are added to the mixture in sequence and stirred to obtain the mixture.

[0031] In this embodiment, an emulsifier, a dispersant, and a stabilizer are added sequentially to the mixture and stirred to obtain a mixture. The specific process is as follows: S301: The mixture is heated to 40~50℃ to melt, and the emulsifier, dispersant, and stabilizer are added sequentially; S302: After each additive is added, the mixture is stirred at a speed of 200~300 rpm for 10~15 minutes; S303: During the stirring process, samples are taken periodically to observe the state of the mixture system and to observe whether there is any separation or precipitation; S304: After the mixing is completed, the viscosity of the material is tested and controlled within the range of 500~800 mPa·s.

[0032] In the above process, the mixture is heated to 40~50℃ to melt, and emulsifier, dispersant and stabilizer are added in sequence; after each addition of an auxiliary agent, the mixture is stirred at 200~300 rpm for 10~15 minutes; during the stirring process, the mixture is sampled regularly to observe the state of the mixture and to observe whether there is any separation or precipitation; after the mixing is completed, the viscosity of the material is tested and controlled within the range of 500~800 mPa·s.

[0033] S400: Feed the mixed materials into the ultrafine pulverizer, adjust the pulverizing pressure to 0.6~0.8MPa, and pulverize until the material particle size reaches 300~400 mesh.

[0034] In this embodiment, the mixed materials are fed into an ultrafine pulverizer, and the pulverizing pressure is adjusted to 0.6~0.8MPa. The materials are pulverized until the particle size reaches 300~400 mesh. During the ultrafine pulverization process, the particle size of the materials needs to be continuously monitored, and samples are taken for testing every 15 minutes to ensure that the coefficient of variation of the uniformity of the final material particle size is ≤5%. At the same time, the feeding speed of the pulverizer is controlled at 20~30kg / h to avoid insufficient pulverization or equipment overload caused by feeding too fast. After pulverization, the materials need to be immediately transferred to a sealed container for temporary storage to prevent moisture absorption and dust contamination.

[0035] S500: Add an appropriate amount of deionized water to the crushed material, stir until a plastic material is formed, and then send it into an extrusion granulator for granulation.

[0036] In this embodiment, an appropriate amount of deionized water is added to the pulverized material, and the mixture is stirred until a plastic material is formed. The material is then fed into an extrusion granulator for granulation. The specific process is as follows: S501: Deionized water is added to the pulverized material, wherein the deionized water is added slowly in batches, and the amount added in each batch does not exceed 5% of the total weight of the material; S502: During the water addition process, the mixture is continuously stirred, and the stirring speed is gradually adjusted to 300~400 rpm to form a plastic material; S503: The material is fed into an extrusion granulator for granulation, and the particle size is controlled to be 0.8~1.2 mm. The granulated particles are then fed into a dryer and dried at 60~80℃ for 2~3 hours until the particle moisture content is ≤3%.

[0037] In the above process, firstly, deionized water is added to the crushed material, with the deionized water added slowly in batches, and the amount added in each batch not exceeding 5% of the total weight of the material; during the water addition process, the stirring is continuously adjusted, and the stirring speed is gradually adjusted to 300~400 rpm to form a plastic material; then it is sent to an extrusion granulator for granulation, and the particle size is controlled to be 0.8~1.2mm. The granulated particles are sent to a dryer and dried at 60~80℃ for 2~3 hours until the moisture content of the particles is ≤3%.

[0038] S600: The dried granules are sieved through a screening machine to remove unqualified granules that do not meet the size requirements. The qualified granules are then weighed and packaged to obtain the finished product.

[0039] In this embodiment, the dried granules are sieved using a screening machine to remove unqualified granules that do not meet the particle size requirements. The qualified granules are then weighed and packaged to obtain the finished product. The screening machine uses a double-layer screening structure, with the upper screen having a mesh size of 1.2 mm and the lower screen having a mesh size of 0.8 mm. Only the granules between the two screens are collected as qualified products. After screening, unqualified granules need to be recycled, re-crushed, and granulated to improve the utilization rate of raw materials. Automatic weighing equipment is used for weighing and packaging, with the weighing error controlled within ±0.5 g. The packaging material is a moisture-proof and impermeable composite film bag. After packaging, the bag is sealed in time and the product information is labeled to ensure the product performance is stable during storage and transportation.

[0040] This invention also provides an application of a combination of fluthiamethoxam and bensulfuron-methyl herbicides for weed control in paddy fields.

[0041] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein.

[0042] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope.

Claims

1. A combination of fluthiamethoxam and bensulfuron-methyl herbicides for paddy fields, characterized in that, It includes fluthiamethoxam, bensulfuron-methyl, adjuvants, and organic solvents. The adjuvants include emulsifiers, dispersants, and stabilizers. The emulsifier is sodium dodecylbenzenesulfonate, the dispersant is polyoxyethylene tristyrene phenyl phosphate, the stabilizer is epoxidized soybean oil, and the organic solvent is xylene.

2. A method for preparing a combination of fluthiamethoxam and bensulfuron-methyl for paddy fields, as described in claim 1, characterized in that, Includes the following steps: Obtain fluthiamethoxam technical grade, bensulfuron technical grade, and adjuvants. The fluthiamethoxam and bensulfuron technical grades are pulverized separately using a pulverizing device. Pretreated fluthiamethoxam, bensulfuron, and adjuvants are weighed according to weight ratio. The weighed fluthiamethoxam is added to an organic solvent and stirred until dissolved. The weighed bensulfuron is added, and stirring continues until the system is uniformly dispersed. Emulsifiers, dispersants, and stabilizers are added sequentially to the mixture, and the mixture is stirred to obtain a final product. The final product is fed into an ultrafine pulverizer, and the pulverizing pressure is adjusted to 0.6~0.8 MPa, pulverizing until the particle size reaches 300~400 mesh. An appropriate amount of deionized water is added to the pulverized material, and the mixture is stirred until a plastic material is formed. The final product is then fed into an extrusion granulator for granulation. The dried granules are sieved through a screening machine to remove unqualified granules that do not meet the size requirements. The qualified granules are weighed and packaged to obtain the finished product.

3. The preparation method of the combination of fluthiamethoxam and bensulfuron-methyl for paddy fields as described in claim 2, characterized in that, In the steps of obtaining fluthiamethoxam technical, bensulfuron technical, and adjuvants, and pulverizing fluthiamethoxam technical and bensulfuron technical separately using pulverizing equipment: the pulverized fluthiamethoxam technical and bensulfuron technical are screened for impurities to remove particles exceeding the size limit and impurity particles; the screened technical and adjuvants are dried separately to control the moisture content ≤1%; the dried technical and adjuvants are classified, sealed, and stored, and key information such as batch and content of each raw material is recorded to establish a raw material traceability file; the fluthiamethoxam technical and bensulfuron technical are pulverized to 200~300 mesh using pulverizing equipment.

4. The preparation method of the combination of fluthiamethoxam and bensulfuron-methyl for paddy fields as described in claim 2, characterized in that, In the steps of weighing pretreated fluthiamethoxam, bensulfuron-methyl, and adjuvants according to the weight ratio, adding the weighed fluthiamethoxam to the organic solvent and stirring until dissolved, adding the weighed bensulfuron-methyl, and continuing to stir until the system is uniformly dispersed: the organic solvent is preheated to 30~40℃, the weighed fluthiamethoxam is added to the organic solvent, heated to 50~60℃, and continuously stirred until the fluthiamethoxam is completely dissolved; the solution temperature is monitored in real time during the dissolution process, and the temperature fluctuation does not exceed ±2℃; after adding bensulfuron-methyl, a gradient stirring method is used, first stirring at low speed for 5 minutes, and then gradually increasing the speed to 200 rpm.

5. The preparation method of the combination of fluthiamethoxam and bensulfuron-methyl for paddy fields as described in claim 2, characterized in that, In the step of adding emulsifier, dispersant and stabilizer to the mixture in sequence and stirring to obtain the mixture material: the mixture is heated to 40~50℃ to melt, and emulsifier, dispersant and stabilizer are added in sequence; after each addition of an additive, stirring is carried out at a stirring speed of 200~300rpm for 10~15min; during the stirring process, the state of the mixture system is sampled regularly to observe whether there is any separation or precipitation; after the mixing is completed, the viscosity of the material is tested and controlled within the range of 500~800mPa・s.

6. The preparation method of the combination of fluthiamethoxam and bensulfuron-methyl for paddy fields as described in claim 2, characterized in that, In the step of adding an appropriate amount of deionized water to the pulverized material, stirring until a plastic material is formed, and then feeding it into an extrusion granulator for granulation: Deionized water is added to the pulverized material in batches, with each batch not exceeding 5% of the total weight of the material; the material is continuously stirred during the water addition process, with the stirring speed gradually adjusted to 300~400 rpm to form a plastic material; the material is then fed into an extrusion granulator for granulation, controlling the particle size to be 0.8~1.2 mm; the granulated particles are then fed into a dryer and dried at 60~80℃ for 2~3 hours until the particle moisture content is ≤3%.

7. Application of the combination of fluthiamethoxam and bensulfuron-methyl as described in claim 1 for weed control in paddy fields.

Images