阅读说明：本技术 一种吡蚜酮噻虫嗪复配杀虫剂及其制备方法 (Pymetrozine and thiamethoxam compound insecticide and preparation method thereof ) 是由 薛云兰 董贤娴 刘建华 张泂然 刘巍 王荣 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种吡蚜酮噻虫嗪复配杀虫剂及其制备方法,杀虫剂由以下质量百分比的组分制成：吡蚜酮10-40％,噻虫嗪10-40％,分散剂5-10％,润湿剂1-5％,崩解剂1-10％,渗透剂1-5％,PH调节剂1-5％,消泡剂0.1-5％,余量为载体；制备方法包括以下步骤：S1、称取上述组分；S2、将各组分混合均匀得到预混合物料,将预混合物料粉碎至粒径15μm以下,得到预处理物料；S3、将水与预处理物料按照质量比9:41的比例混合并搅拌4-6min,得到固液混合物料；S4、将固液混合物料进行挤压造粒,造粒后干燥并过筛得到颗粒大小一致的杀虫剂成品。本发明公开的吡蚜酮噻虫嗪复配杀虫剂具有长效稳定、药效显著、使用效率高、成本低等优点。(The invention discloses a pymetrozine and thiamethoxam compound insecticide and a preparation method thereof, wherein the insecticide is prepared from the following components in percentage by mass: 10-40% of pymetrozine, 10-40% of thiamethoxam, 5-10% of a dispersing agent, 1-5% of a wetting agent, 1-10% of a disintegrating agent, 1-5% of a penetrating agent, 1-5% of a pH regulator, 0.1-5% of a defoaming agent and the balance of a carrier; the preparation method comprises the following steps: s1, weighing the components; s2, uniformly mixing the components to obtain a premixed material, and crushing the premixed material to a particle size of below 15 microns to obtain a pretreated material; s3, mixing water and the pretreated material according to the mass ratio of 9:41, and stirring for 4-6min to obtain a solid-liquid mixed material; and S4, extruding and granulating the solid-liquid mixed material, drying after granulation, and sieving to obtain the finished pesticide product with consistent particle size. The pymetrozine and thiamethoxam compound insecticide disclosed by the invention has the advantages of long-acting stability, obvious pesticide effect, high use efficiency, low cost and the like.)

1. The pymetrozine and thiamethoxam compound insecticide is characterized by being prepared from the following components in percentage by mass:

10-40% of pymetrozine, 10-40% of thiamethoxam, 5-10% of dispersing agent, 1-5% of wetting agent, 1-10% of disintegrating agent, 1-5% of penetrating agent, 1-5% of pH regulator, 0.1-5% of defoaming agent and the balance of carrier.

2. The compound insecticide of pymetrozine and thiamethoxam according to claim 1, wherein the dispersant is one or more of polycarboxylate and sodium lignosulfonate.

3. The compound insecticide of pymetrozine and thiamethoxam according to claim 1, wherein the wetting agent is alkyl naphthalene sulfonate.

4. The compound insecticide of pymetrozine and thiamethoxam according to claim 1, wherein the disintegrant is ammonium sulfate.

5. The compound insecticide of pymetrozine and thiamethoxam according to claim 1, wherein the penetrant is an aliphatic alcohol ethylene oxide condensate.

6. The compound insecticide of pymetrozine and thiamethoxam according to claim 1, wherein the pH regulator is citric acid.

7. The compound insecticide of pymetrozine and thiamethoxam according to claim 1, wherein the antifoaming agent is sodium aliphatate.

8. The compound insecticide as claimed in claim 1, wherein the carrier is one or more of calcined kaolin and water-soluble corn starch.

9. A preparation method of the pymetrozine and thiamethoxam compound insecticide as claimed in claim 1, which is characterized by comprising the following steps:

s1, weighing the following raw materials in percentage by mass:

10-40% of pymetrozine, 10-40% of thiamethoxam, 5-10% of a dispersing agent, 1-5% of a wetting agent, 1-10% of a disintegrating agent, 1-5% of a penetrating agent, 1-5% of a pH regulator, 0.1-5% of a defoaming agent and the balance of a carrier;

s2, mixing all the raw materials weighed in the S1 for 1h to obtain a premixed material, crushing the premixed material at 0-10 ℃ until the particle size is below 15 mu m, and then mixing for 25-35min to obtain a pretreated material;

s3, mixing water and the pretreated material according to the mass ratio of 9:41, and stirring for 4-6min to obtain a solid-liquid mixed material;

s4, extruding and granulating the solid-liquid mixed material at 40-50 ℃ at a rotating speed of 30r/min, drying the prepared granules at 50-60 ℃ for 15min, and sieving to obtain the pymetrozine thiamethoxam compound pesticide with the particle size of 1.0 mm.

Technical Field

The invention relates to the technical field related to crop insecticides, in particular to a pymetrozine and thiamethoxam compound insecticide and a preparation method thereof.

Background

Pymetrozine belongs to pyridine or triazone insecticides, is a non-biocidal insecticide, has contact poisoning effect on pests, has systemic activity, and has excellent control effect on piercing-sucking mouthpart pests of various crops; thiamethoxam is a second generation nicotine high-efficiency low-toxicity insecticide, has stomach toxicity, contact killing and systemic activity on pests, is used for leaf surface spraying and soil root irrigation treatment, is absorbed quickly after being applied and is conducted to each part of a plant, and has good control effect on piercing-sucking pests such as aphids, plant hoppers, leafhoppers, whiteflies and the like.

The pymetrozine and thiamethoxam compound pesticide has excellent insecticidal effect, long duration and wide insecticidal range, so the use amount is large, and the compound pesticide is a main product aiming at diseases such as rice planthopper, aphid, thrips and the like in the current market.

The existing pymetrozine and thiamethoxam compound insecticide is mainly wettable powder and dry suspending agent, the powder is low in production cost, stable in product quality index and long in pesticide effect duration, and is popular with users, but because the particle size of the powder is small, dust is raised in the production process, so that the powder is harmful to the environment and manufacturers in the production process, and potential safety hazards exist in the production and transportation processes, the transportation is not convenient, and the leakage risk exists. The dry suspending agent has finer particles and higher suspension rate, but has the defects of high production energy consumption, high production auxiliary cost, short drug effect durability, easy agglomeration of particles and the like; in addition, although the produced particles are fine, the problems of product quality such as moisture, agglomeration and the like cannot be solved by using a spray granulation method for the pymetrozine thiamethoxam insecticide, the duration of the pesticide effect is low, and the dilution times need to be reduced or the use times need to be increased to ensure the effect; meanwhile, the existing preparation method of the dry suspending agent is generally a spraying method, the drying temperature of the method is high, the drying temperature is difficult to control, and the thiamethoxam is molten at high temperature, so that the dispersibility, the disintegration, the stability, the suspension rate, the drug effect and the like of the product are adversely affected.

Disclosure of Invention

Therefore, the invention provides a pymetrozine and thiamethoxam compound insecticide and a preparation method thereof, and aims to solve the problems in the prior art.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

in a first aspect, the embodiment of the invention provides a pymetrozine and thiamethoxam compound insecticide which is prepared from the following components in percentage by mass:

10-40% of pymetrozine, 10-40% of thiamethoxam, 5-10% of dispersing agent, 1-5% of wetting agent, 1-10% of disintegrating agent, 1-5% of penetrating agent, 1-5% of pH regulator, 0.1-5% of defoaming agent and the balance of carrier.

Preferably, the dispersant is one or more of polycarboxylate, sodium lignosulfonate.

Preferably, the wetting agent is an alkyl naphthalene sulfonate.

Preferably, the disintegrant is ammonium sulfate.

Preferably, the penetrant is an aliphatic alcohol ethylene oxide condensate.

Preferably, the pH adjusting agent is citric acid.

Preferably, the antifoaming agent is sodium fatty acid.

Preferably, the carrier is one or more of calcined kaolin, water soluble corn starch.

In another aspect, an embodiment of the present invention provides a preparation method of the above pesticide, which includes the following steps:

s1, weighing the following raw materials in percentage by mass:

10-40% of pymetrozine, 10-40% of thiamethoxam, 5-10% of a dispersing agent, 1-5% of a wetting agent, 1-10% of a disintegrating agent, 1-5% of a penetrating agent, 1-5% of a pH regulator, 0.1-5% of a defoaming agent and the balance of a carrier;

s2, mixing all the raw materials weighed in the S1 for 1h to obtain a premixed material, crushing the premixed material at 0-10 ℃ until the particle size is below 15 mu m, and then mixing for 25-35min to obtain a pretreated material;

s3, mixing water and the pretreated material according to the mass ratio of 9:41, and stirring for 4-6min to obtain a solid-liquid mixed material;

s4, extruding and granulating the solid-liquid mixed material at 40-50 ℃ at the rotating speed of 30r/min, drying the prepared granules at 50-60 ℃ for 15min, and sieving to obtain the pymetrozine thiamethoxam compound pesticide with the particle size of 1.0 mm.

Compared with the prior art, the embodiment of the invention at least has the following beneficial effects:

(1) the pymetrozine and thiamethoxam compound pesticide provided by the embodiment of the invention is in a water dispersible granule dosage form, has the advantages of long pesticide effect duration of the existing wettable powder and granule, low preparation energy consumption and cost and stable product quality index, and also has high dispersibility of the existing suspending agent; the water dispersible granule does not use a solvent, so that the processed granule is easy to flow freely, has certain strength and is easy to disintegrate, the suspension rate after dispersion is high, no dust is generated, the use is very safe and efficient, and a plurality of problems in the production, storage and use processes are solved.

(2) The pymetrozine and thiamethoxam compound pesticide provided by the embodiment of the invention adopts low-temperature crushing and extrusion granulation to replace the traditional spray granulation, thereby not only avoiding the influence of high temperature on the pesticide and ensuring the suspension rate, dispersibility, stability, disintegrability and pesticide effect of the pesticide, but also avoiding the generation of dust in the production process, being more beneficial to the environment and manufacturers, and being safer in production and transportation.

(3) The pymetrozine and thiamethoxam compound insecticide provided by the embodiment of the invention has very excellent control effect on rice planthopper, aphid, thrips and other insect pests, and can achieve more excellent control effect with smaller dosage compared with the existing insecticide because of strong pesticide effect and good persistence.

Detailed description of the invention

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail with reference to specific embodiments below. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the description of the present invention, "a plurality" means two or more unless otherwise specified. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements specifically listed, but may include other steps or elements not expressly listed that are inherent to such process, method, article, or apparatus or that are added to such process, method, article, or apparatus based on the optimization concepts of the present invention.

The mass percentages of the components of examples 1-3 are shown in Table 1. Examples 1-3 the details of the ingredients of each component, except for pymetrozine and thiamethoxam, are shown in table 2.

TABLE 1-examples 1 to 3 percentages by mass of the respective components

TABLE 2 specific ingredients for each of the components of examples 1-3

The preparation of example 1 is as follows:

s1, weighing the raw materials in the table 2 according to the mass percentage shown in the table 1;

s2, putting the raw materials in the S1 into a mixer, mixing for 1h to obtain a premixed material, conveying the premixed material into an ultramicro jet mill through a flood dragon, and grinding the premixed material to a particle size of below 15 mu m at a temperature of below 0-10 ℃ to obtain a pretreated material; conveying the pretreated materials to a finished product mixing kettle through negative pressure, mixing for 30min, sampling, detecting, and performing S3 after the mixing degree is qualified, otherwise, repeating the operation until the operation is qualified;

s3, mixing water and the pretreated material in the S2 according to the mass ratio of 9:41, and stirring for 5min to obtain a solid-liquid mixed material;

and S4, opening an extrusion granulation cooling system, uniformly adding the solid-liquid mixed material in the step S3 into a granulator for extrusion granulation, regulating the rotation speed of the extrusion granulator to 30r/min, controlling the granulation temperature to be between 40 and 50 ℃, putting the granulated particles into a fluidized bed boiling dryer for drying at the temperature of between 50 and 60 ℃ for 15min after granulation, and then carrying out whole-particle grading through a vibrating screen to obtain the pymetrozine thiamethoxam compound insecticide with the particle size of 1.0mm and the uniform particle size.

Examples 2-3 were prepared in the same manner as in example 1.

Next, performance tests were performed on inventive examples 1 to 3 to illustrate the advantageous effects of the present invention.

Test 1: determination of performance parameters

The results of the measurements of the various performance parameters of the pymetrozine thiamethoxam compounded insecticide provided in examples 1-3 are shown in table 3.

TABLE 3-examples 1 to 3 Property parameters

And (3) testing 2: prevention and efficacy test

The field rice planthopper control effect tests are respectively carried out on the pymetrozine and thiamethoxam compound insecticide provided by the embodiments 1-3 of the invention. The spraying method is adopted to apply the pesticide at the early stage of full-growth of rice planthoppers, rice stems and leaves are uniformly sprayed, the weight is heavier than the lower part of rice, the pesticide application amount is 30 g/hectare, and the water adding amount is 50 kg. The control effect results are as follows:

the control effects of the examples 1-3 are 76.97%, 72.29% and 73.09% respectively after 1 day of drug effect investigation;

the control effects of the examples 1-3 are respectively 92.66%, 90.01% and 90.59% after 3 days of drug effect investigation;

the control effect of examples 1-3 was found to be 96.58%, 95.79%, and 95.24% after 7 days of drug action. The test results show that the pymetrozine and thiamethoxam compound insecticide provided by the embodiments 1-3 of the invention has good quick-acting property and lasting effect on rice planthoppers. The animal and plant toxicity test result shows that the pesticide is safe and reliable to crops in the test dosage range.

All the technical features of the above embodiments can be combined arbitrarily, and for simplicity of description, all possible combinations of the technical features of the above embodiments are not described; these examples, which are not explicitly described, should be considered to be within the scope of the present description.

The present invention has been described in considerable detail by the general description and the specific examples given above. It should be noted that it is obvious that several variations and modifications can be made to these specific embodiments without departing from the inventive concept, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.