CN115211435A - A kind of efficient plant insect-proof composition and preparation method thereof - Google Patents

Abstract

The invention relates to the field of A01N51/00 classified by IPC, in particular to an efficient plant insect-proof composition and a preparation method thereof. Insect repellent composition, the raw materials comprise the following mass percentages: 3-7% of the first active ingredient, 6-10% of the second active ingredient, 1-3% of the modified rosin ester, 1-5% of the polycarboxylate, sulfonic acid Salt 1-5%, inorganic particles 2-5%, antifreeze 2-5%, preservative 0.1-1%, defoamer 0.1-1%, thickener 0.1-0.5%, and deionized water to make up the balance. The anti-insect composition prepared by the application has good efficacy against diseases and insects, and can effectively improve the high-low temperature stability and long-term storage strength of the composition, is suitable for promotion in the field of pesticides, and has broad development prospects.

Description

A kind of efficient plant insect-proof composition and preparation method thereof

technical field

The invention relates to the field of A01N51/00 classified by IPC, in particular to an efficient plant insect-proof composition and a preparation method thereof.

Background technique

With the continuous development of society and economy, the earth's population is further showing an upward trend, which makes the world still facing food problems, and the problem of crop diseases and insect pests is still one of the main problems affecting the increase of world food production.

The prior art (CN202010516575.4) provides an antiviral and insect pest composition, the raw materials mainly include protein active ingredients, amino oligosaccharide active ingredients and related auxiliaries, claiming to have excellent anti-disease and insect performance, but in its Protein components are prone to composition inactivation and poor stability during high temperature, low temperature and long-term storage, thus affecting the further use of the pest-resistant composition.

Therefore, there is an urgent need for a plant pest control composition which can have excellent high-low stability and long-term storage stability on the basis of excellent resistance to diseases and insect pests.

SUMMARY OF THE INVENTION

In order to solve the above problems, the first aspect of the present invention provides an efficient plant pest control composition, the raw materials comprise the following mass percentages: 3-7% of the first active ingredient, 6-10% of the second active ingredient, and 1-10% of rosin ester. 3%, polycarboxylate 1-5%, sulfonate 1-5%, inorganic particles 2-5%, antifreeze 2-5%, preservative 0.1-1%, defoamer 0.1-1%, increase Thickener 0.1-0.5%, deionized water to make up the balance.

As a preferred solution, the first active ingredient is at least one of lufenuron, diafenthiuron, chlorfenuron, cyhalothrin, flufenoxuron, diflubenzuron, and flufenoxuron.

As a preferred solution, the first active ingredient is lufenuron.

As a preferred solution, the second active ingredient is at least one of indoxacarb, fipronil, azoxystrobin, bifenthrin, and dinotefuran.

As a preferred solution, the second active ingredient is indoxacarb.

As a preferred solution, the mass ratio of the first active ingredient and the second active ingredient is 5-6:7-9.

As a preferred solution, the mass percentage of the first active ingredient and the second active ingredient in the composition is 12-13%.

As a preferred solution, the average particle size of the first active ingredient is 50-300 nm.

As a preferred solution, the average particle size of the first active ingredient is 80-160 nm.

As a preferred solution, the mass ratio of the polycarboxylate to the first active ingredient is 2-3:5-6.

As a preferred solution, the rosin acid ester modified product is rosin acid ester.

As a preferred solution, the inorganic particles are at least one of titanium dioxide, white carbon black, magnesium aluminum silicate, and zinc oxide.

As a preferred solution, the inorganic particles are magnesium aluminum silicate and white carbon black.

As a preferred solution, the mass ratio of the magnesium aluminum silicate and white carbon black is 1:1.

As a preferred solution, the polycarboxylate is sodium polycarboxylate.

In this application, by adding polycarboxylate sodium salt, and limiting the average molecular weight of the polycarboxylate and the average particle size of lufenuron, the absorption effect of the composition and the penetration effect on plants can be effectively improved when the composition is used, and further The improved stability of the composition at high temperature. The applicant speculates that when the average particle size of lufenuron is 80-160 nm, and the mass ratio of polycarboxylate to lufenuron is 2-3:5-6, the lufenuron particles can be mixed with lufenuron in the system. Polycarboxylate forms independent active molecular microcolloids, and the effective encapsulation avoids the hydrolysis and re-attachment of smaller colloids in the system, thereby avoiding the appearance of excessively large colloidal active molecules and further increasing the microcolloids in the system. Quantity, so that the composition system forms a stable nano-dispersion system, which can effectively avoid the large particle colloid that occurs after the enhanced colloid irregular motion when encountering high temperature.

As a preferred solution, the sulfonate is at least one of alkyl succinate sulfonate, fatty acid hydroxyethane sulfonate, and fatty alcohol ether sulfonate.

As a preferred solution, the sulfonate is an alkyl succinate sulfonate.

As a preferred solution, the mass ratio of the alkyl succinate sulfonate to the second active ingredient is 2-3:7-9.

In the present application, by limiting the mass ratio of the alkyl succinate sulfonate to the second active ingredient, the plant penetration performance of the composition system during use is effectively improved, and the action efficiency of the composition against diseases and insect pests is accelerated. The applicant speculates that: when an appropriate amount of alkyl succinate sulfonate is added, the multi-branched structure in its structure can play a more obvious role in reducing the surface tension during use, and the hydrophilicity located in the middle structure of its molecule The base can effectively promote the hydrophilic properties of indoxacarb in the water system and spraying process.

As a preferred solution, the average molecular weight of the polycarboxylate is 2000-15000.

As a preferred solution, the average molecular weight of the polycarboxylate is 4000-8000.

In this application, by limiting the addition ratio of the polycarboxylate and further limiting the average molecular weight of the polycarboxylate, the dispersion effect is effectively improved, and at the same time, the occurrence of the aging phenomenon in the composition system is effectively avoided, and the combined effect is improved. Long-term storage stability and long-term efficacy stability of active ingredients. The applicant speculates that the addition of a polycarboxylate with a suitable molecular weight can not only effectively serve as a wetting dispersant and an effective solute in a dispersing system, but also that the addition of a suitable and longer molecular chain can further improve the spacing between active molecules. And microscopically enhance steric hindrance, reduce the molecular chain connection and flocculation phenomenon caused by the addition of long molecular chains between components, and can further promote the ionization degree of other raw materials in the system and improve the electrostatic repulsion of the system; When the average molecular weight of the carboxylate is low, the anti-flocculation effect cannot be effectively performed. When the average molecular weight of the polycarboxylate is high, the long molecular chain existing in itself will easily cause connection flocculation.

As a preferred solution, the antifreeze is at least one of glycerol, ethylene glycol, diethylene glycol, and sorbitol.

As a preferred solution, the antifreeze is ethylene glycol.

As a preferred solution, the preservative is at least one of carthone and sodium benzoate.

As a preferred solution, the preservative is sodium benzoate.

As a preferred solution, the defoamer is at least one of a silicone defoamer and a polyether defoamer.

As a preferred solution, the defoaming agent is a polysiloxane defoaming agent.

As a preferred solution, the thickener is at least one of xanthan gum, carbomer, hydroxymethyl cellulose, and sodium alginate.

As a preferred solution, the thickener is xanthan gum.

The second aspect of the present invention provides a method for preparing the above-mentioned efficient plant insect-proof composition, the step comprising at least the following steps: (1) combining rosin ester modified product, polycarboxylate, sulfonate, inorganic particles, Preservatives, deionized water and defoamer are placed in the reaction kettle and mixed; (2) under high-speed shearing, add thickener, antifreeze, the first active ingredient and the second active ingredient, in the case of adding ball mill beads Carry out ball milling, the grinding is completed, and it is vested.

Beneficial effects:

1. A kind of plant pest control composition prepared in the application of the present invention has excellent pest and disease protection effect, can effectively prevent pests on plants, and has good plant absorption and penetration performance, and has good economic and social benefits .

2. In the application of the present invention, by limiting the conditions such as the compounding ratio of polycarboxylate and the first active ingredient, the quantity and dispersion effect of microcolloids in the composition system are effectively improved, the appearance of large-scale colloids is avoided, and stable colloids are formed. Nanodispersion system.

3. In the application of the present invention, by further limiting the molecular weight of the polycarboxylate, the dispersion effect is effectively improved, and at the same time, the occurrence of the aging phenomenon in the composition system is effectively avoided, and the long-term storage stability of the combination and the active ingredient are improved. Long-term efficacy and stability.

Description of drawings

FIG. 1 is a statistical chart of the original data survey of the field test of the composition obtained in Example 1 of the application.

Detailed ways

Example 1

The first aspect of embodiment 1 provides an efficient plant insect-proof composition, the raw materials comprise the following mass percentages: lufenuron 5%, indoxacarb 8%, rosin ester 2%, polycarboxylate sodium salt 2%, alkane sulfosuccinate 2%, magnesium aluminum silicate 1.5%, silica 1.5%, ethylene glycol 4.0%, sodium benzoate 0.3%, xanthan gum 0.24%, polysiloxane 0.3%, deionized water Supplementary balance.

In this embodiment, the average particle size of lufenuron is 120 nm, which is purchased from the lufenuron product sold by Shaanxi Purns Pharmaceutical Co., Ltd., and has undergone secondary grinding.

In this embodiment, indoxacarb is an indoxacarb product sold by Hubei Shuangyan Chemical Co., Ltd.

In this embodiment, the average molecular weight of the polycarboxylate sodium salt is 5000, which is purchased from the polycarboxylate sodium salt product of Onstar New Carbon Material Changzhou Co., Ltd.

In this embodiment, the rosin ester is the rosin ester product of model SC29 sold by Jiangsu Qingyu Chemical Technology Co., Ltd.

In this embodiment, the polysiloxane is a 495-type polydimethylsiloxane product sold by Jinan Xinglongda Chemical Co., Ltd.

The second aspect of the present embodiment provides a method for preparing the above-mentioned efficient plant insect-proof composition, the step comprising the following steps: (1) modifying rosin acid ester, polycarboxylate sodium salt, alkyl succinate sulfonate acid salt, magnesium aluminum silicate, silica, sodium benzoate, deionized water and polysiloxane were put into the reaction kettle and stirred and mixed; (2) under high-speed shearing, add xanthan gum, ethylene glycol and lufenuron As well as indoxacarb, ball milling is carried out with the addition of ball milling beads, and the milling is completed, and it is obtained.

Example 2

The specific implementation of this example is the same as that of Example 1, except that the content of lufenuron is 6%, and the content of indoxacarb is 7%.

Comparative Example 1

The specific embodiment of this comparative example is the same as that of Example 1, except that the content of sodium polycarboxylate is 0.5%.

Comparative Example 2

The specific implementation of this comparative example is the same as that of Example 1, except that the content of alkyl succinate sulfonate is 0.5%.

Comparative Example 3

The specific embodiment of this comparative example is the same as that of Example 1, except that the average molecular weight of the sodium polycarboxylate is 1000.

Performance evaluation

1. Heat storage stability: With reference to the standard of GB/T19136-2003, the heat storage stability test was carried out for the pesticides prepared in all examples and comparative examples, and the suspension rate of the final pesticide was observed, and the measured results were recorded. into Table 1.

2.: Low temperature wet sieve: carry out the low temperature wet sieve test for the pesticides prepared in all examples and comparative examples, and store the pesticides prepared in all examples at a temperature of 0±2°C for 14d, and take out after 14d After returning to room temperature, the samples were filtered through a 20-micron filter to test the sieving rate. 5 samples were tested for each example and comparative example, and the average value of the measured values was recorded in Table 1.

3. Field efficacy: The field pest control efficacy test was carried out on the plant pest control composition prepared in Example 1.

Test Crop: Cabbage

Control object: Beet armyworm

Trial start date: May 30, 2021

Trial completion date: June 6, 2021

Investigation time: before spraying, 2d and 7d after spraying.

Investigation method: The five-point sampling method was adopted, 15 cabbage plants were marked in each plot, and the number of live insects on the plants was investigated at the specified time.

Application method and dosage: spray method, the water consumption is 750 liters/ha.

Calculation method of drug effect:

The obtained drug efficacy test results are recorded in Table 2.

The results of the variance analysis of the mean control efficacy of the obtained drug efficacy test results are recorded in Table 3.

During the test, the weather conditions of the experimental site on the day of application were recorded in Table 4.

During the test, the daily gas phase conditions were recorded in Table 5.

Table 1

Example Heat storage suspension rate% Low temperature wet sieve% Example 1 99.3 99.9 Example 2 99.1 99.6 Comparative Example 1 93.1 94.4 Comparative Example 2 94.2 95.2 Comparative Example 3 94.7 94.9

Table 2

table 3

Table 4

table 5

From Examples 1 to 2, Comparative Examples 1 to 3 and Tables 1 to 5, it can be known that the present invention provides an efficient plant pest control composition and its preparation, and the prepared pest control composition has good pest control drugs It is suitable for promotion in the field of pesticides and has broad development prospects. Among them, Example 1 obtained the best performance index under the factors such as the best preparation raw material ratio and preparation process.

Claims (10)

1. An efficient plant pest control composition, characterized in that: the raw material comprises the following mass percentages: 3-7% of the first active ingredient, 6-10% of the second active ingredient, 1-3% of rosin acid ester modified product, Polycarboxylate 1-5%, sulfonate 1-5%, inorganic particles 2-5%, antifreeze 2-5%, preservative 0.1-1%, defoamer 0.1-1%, thickener 0.1 ~ 0.5%, make up the balance with deionized water. 2. The efficient plant insect control composition according to claim 1, wherein the first active ingredient is lufenuron, diafenthiuron, chlorfenapyr, cyhalothrin, fenflufenuron, At least one of diflubenzuron and flufenoxuron. 3. The efficient plant insect-proof composition according to any one of claims 1 to 2, wherein the second active ingredient is indoxacarb, fipronil, azoxystrobin, bifenthrin, furan at least one of pyramid. 4 . The efficient plant insect-proof composition according to claim 1 , wherein the inorganic particles are at least one of titanium dioxide, white carbon black, magnesium aluminum silicate, and zinc oxide. 5 . 5 . The efficient plant insect control composition according to claim 1 , wherein the polycarboxylate is sodium polycarboxylate. 6 . 6 . The efficient plant insect-proof composition according to claim 1 , wherein the average molecular weight of the polycarboxylate is 30,000-60,000. 7 . 7 . The efficient plant pest control composition according to claim 1 , wherein the mass ratio of the polycarboxylate to the first active ingredient is 2-3:5-6. 8 . 8 . The efficient plant insect-proof composition according to claim 1 , wherein the antifreeze agent is at least one of glycerol, ethylene glycol, diethylene glycol and sorbitol. 9 . 9 . The high-efficiency plant insect-proof composition according to claim 1 , wherein the preservative is at least one of Kassone and sodium benzoate. 10 . 10. A method for preparing an efficient plant insect-proof composition according to any one of claims 1 to 9, characterized in that: the step comprises at least the following steps: (1) modifying rosin acid ester, polycarboxylate Acid salts, sulfonates, inorganic particles, preservatives, deionized water and defoamer are placed in the reaction kettle and stirred and mixed; (2) under high-speed shearing, add thickener, antifreeze, the first active ingredient and the first active ingredient. The second active ingredient is ball-milled with the addition of ball-milling beads, and the milling is completed.

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