CN110839643A - A kind of pesticide composition for preventing and treating plant diseases and preparation method thereof - Google Patents

Abstract

The invention belongs to the technical field of pesticide preparation, and particularly relates to a pesticide composition for preventing and treating plant diseases and a preparation method thereof. Including veratridine, thiamethoxam, disodium hydrogen phosphate, metconazole, indoxapyr, sulfamethoxazole, alpha-resinol acetate, luteolin, oxalic acid and pesticides allowed and acceptable various auxiliary ingredients. It has good control effect on plant diseases, less residue, simple preparation method, and is suitable for industrial production and application.

Description

A kind of pesticide composition for preventing and treating plant diseases and preparation method thereof

technical field

The invention belongs to the technical field of pesticide preparation, and particularly relates to a pesticide composition for preventing and treating plant diseases and a preparation method thereof.

Background technique

Alternative chemical pesticides, herbicides and fungicides are an effective method for the diseases, insect pests, weeds and other crops grown in large fields, orchards, greenhouses, etc. It has the characteristics of low cost, convenient use and remarkable effect. The use of a large number of pesticides has also brought pollution to the environment and crops, especially the residues on crops, which can induce a variety of diseases after human and animal consumption, and bring direct harm to human health. The removal of residual pesticides on the surface of vegetables and fruits is currently Topics researched and solved by countries all over the world.

Secondly, although pesticides have the characteristics of high efficiency and economy, they have played an important role in preventing biological disasters, ensuring food production and promoting the growth of agricultural product output. However, traditional pesticides have shortcomings such as coarse particles and poor water dispersibility, which make their biological activity low. , slow degradation, resulting in extremely low utilization of pesticides, and will bring many environmental problems;

At present, the fungicides are tebuconazole, nitrile oxazole, metconazole, tetraflurazole, sterilazole, furconazole, and myclobutanil. They are characterized by three functions: protection, treatment and eradication, broad bactericidal spectrum and long lasting effect. For example, tebuconazole is used for the prevention and treatment of rape sclerotinia, which not only has good control effect, but also has the characteristics of lodging resistance and obvious yield increasing effect. , the mechanism of action on bacteria is to inhibit the demethylation of ergosterol on its cell membrane, so that the bacteria cannot form a cell membrane, thereby killing the bacteria. Organophosphorus compounds, carbamate compounds, pyrethroid compounds, etc. have all been used as active ingredients of insecticides.

At present, there are many pesticide ingredients used for sterilization and pest removal, but some insects have developed resistance to these pesticides in recent years. Therefore, there is a need to provide insecticides that are effective against these resistant insects.

Chinese patent application 1010770513A provides a pesticide biodegradation composition and its preparation method, which consists of biological enzymes, stabilizers, synergists, emulsifiers, calcium salts, silicates, fatty alcohols, boric acid and salts, polyphosphates , alkali, sulfate, deionized water and other components, through the organic combination of catalytic decomposition and emulsification technology to produce efficient decomposition of pesticide structure, thereby reducing toxicity of a new type of preparation. Although the patented technology effectively reduces pesticide residues, its bactericidal and insecticidal effects still need to be improved.

Chinese patent application CN102696622A discloses a pesticide composition for preventing and treating plant diseases, especially indazosulfamide or its crystals, combined with tebuconazole, nitrile oxazole, metconazole, tetrafluoroconazole, diaconazole, bran Any one or several compounded pesticide active compositions of mycomycin, fluquinazole and myclobutanil. It can prevent and control a variety of plant diseases, but some raw materials have the effect of inhibiting growth.

SUMMARY OF THE INVENTION

In order to overcome the above technical problems, the present invention provides a pesticide composition for preventing and treating plant diseases, which has good control effect on plant diseases, less residue, simple preparation method, and is suitable for industrial production and application.

For realizing the above purpose, the technical scheme provided by the invention is as follows:

A pesticide composition for controlling plant diseases, comprising the following components:

Veratridine, Thiamethoxam, Disodium Hydrogen Phosphate, Metconazole, Indoxapyr, Wuyamcin, α-Parsanol Acetate, Luteolin, Oxalic Acid;

Preferably, in parts by weight, the pesticide composition for preventing and treating plant diseases includes the following components: 1-5 parts of veratridine, 5-10 parts of thiamethoxam, 0.1-2 parts of disodium hydrogen phosphate, leaf 1-10 parts Mycoconazole, 1-10 parts Indazol, 0.5-3 parts Wuyamectin, 0.1-1.5 parts α-arosinol acetate, 0.1-1 parts luteolin, 1-5 parts oxalic acid share;

Preferably, in parts by weight, the pesticide composition for preventing and treating plant diseases includes the following components: 2-3 parts of veratridine, 6-8 parts of thiamethoxam, 0.5-1 part of disodium hydrogen phosphate, leaf 3-6 parts of mycoconazole, 5-8 parts of indazol, 1-2 parts of Wuyamcin, 0.5-1.0 parts of α-amyrin acetate, 0.1-0.5 parts of luteolin, 2-3 parts of oxalic acid share;

The pesticide composition of the present invention also includes various adjuvant ingredients that are allowed and acceptable in the pesticide.

Preferably, the auxiliary ingredients include but are not limited to solvents, emulsifiers, wetting agents, dispersants, stabilizers, antifreeze agents, thickeners, defoaming agents, synergists, preservatives and fillers, all of which are pesticides The ingredients commonly used or allowed to be used in the preparation are not particularly limited, and the specific ingredients and dosages are determined through experiments according to the requirements of the formula.

Preferably, the auxiliary components include: sodium methylene dinaphthalene sulfonate, xanthan gum, urea, ethanol, deionized water.

Preferably, in parts by weight, the auxiliary components include: 1-3 parts of sodium methylene dinaphthalene sulfonate, 0.05-0.5 parts of xanthan gum, 0.5-1 part of urea, 20-50 parts of ethanol, ionized water 80-120 servings.

Another object of the present invention is to provide a method for preparing the pesticide composition for controlling plant diseases, the steps of which are as follows:

(1) Veratridine is dissolved in ethanol to form an alcohol solution;

(2) oxalic acid, urea, sodium methylene dinaphthalene sulfonate, disodium hydrogen phosphate and xanthan gum are dissolved in deionized water successively; an aqueous solution is formed;

(3) after the alcohol solution is mixed with the aqueous solution, under stirring conditions, add thiamethoxam, metconazole, indoxapyr, and wuyamcin; add emulsifier, α-arosinol acetate, luteolin element, emulsification, forming an emulsion;

(4) adjusting the pH value of the emulsion, ultrasonically or stirring, to prepare the pesticide composition for preventing and treating plant diseases.

Preferably, in step (3), the rotational speed of the stirring is 200-500rpm;

Preferably, in step (3), the added amount of the emulsifier is 1.0-2.0% of the total mass of the emulsion;

Preferably, in step (3), the emulsification is carried out in an emulsifying machine, and further, the rotating speed of the emulsifying machine is adjusted to 1000-2000 rpm and carried out; preferably, in step (4), the pH value uses lemon Acid-sodium bicarbonate for adjustment;

Preferably, the citric acid is an aqueous citric acid solution with a concentration of 30-40%;

Preferably, the sodium bicarbonate concentration is an aqueous sodium bicarbonate solution of 20-30%;

Preferably, in step (4), the pH value is 5-6. The purpose of the present invention is also to provide the application of the pesticide composition in the medicine for controlling plant diseases.

(1) The pesticide prepared by the present invention has good control effect on plant diseases, good lasting effect, good and lasting sterilization, low residue, conforms to the pesticide residue standard, and is an ideal ecological pesticide for modern crop planting.

(2) after the present invention has used multiple active ingredients such as veratridine, thiamethoxam, disodium hydrogen phosphate, metconazole, indoxsulfonamide, wuyamcin, oxalic acid, etc., it has a certain synergistic effect, Reducing the dosage of each single dose can also achieve better results and reduce the adverse impact on the environment. Verticillium wilt, sclerotinia, powdery mildew, rust, and scab, which have developed resistance to pathogens.

(3) In the preparation process, adding citric acid to adjust the pH value can control the pH value of the emulsion on the one hand and ensure the stability of its effect; secondly, it can synergize the insecticidal and bacteriostatic effects of the active ingredients.

(4) two kinds of active ingredients of α-arosinol acetate and luteolin used in the present invention can effectively promote the treatment of pesticides against pathogens such as cucumber powdery mildew, rice sheath blight, cotton wilt, pepper bacterial wilt Prevention and control synergy.

Detailed ways

Example 1

In the present embodiment, the pesticide composition for preventing and treating plant diseases, in parts by weight, includes the following components:

2 parts of veratridine, 6 parts of thiamethoxam, 0.5 part of disodium hydrogen phosphate, 6 parts of metconazole, 5 parts of indazosulfamide, 2 parts of sulfamethoxazole, 0.5 part of α-arosinol acetate, 0.5 parts of luteolin, 2 parts of oxalic acid;

In terms of parts by weight, the auxiliary components include: 2 parts of sodium methylene dinaphthalene sulfonate, 0.1 part of xanthan gum, 0.6 part of urea, 30 parts of ethanol, and 100 parts of ionized water.

The preparation method of the pesticide composition for preventing and treating plant diseases described in this example, the steps are as follows:

(1) Veratridine is dissolved in ethanol to form an alcohol solution;

(2) oxalic acid, urea, sodium methylene dinaphthalene sulfonate, disodium hydrogen phosphate and xanthan gum are dissolved in deionized water successively; an aqueous solution is formed;

(3) after the alcohol solution is mixed with the aqueous solution, under the condition of stirring at 300rpm, add thiamethoxam, metconazole, indoxapyr, wuyamcin; add 1.2% (according to the total mass of the emulsion, the same below ) sodium dodecyl benzene sulfonate, alpha-arosinol acetate, luteolin, the rotating speed of the emulsifying machine is adjusted to emulsify under the condition of 1500rpm to form an emulsion;

(4) as required, using 35% citric acid aqueous solution and 25% sodium bicarbonate to adjust the pH value of the emulsion to 5, and ultrasonically, to prepare the pesticide composition for preventing and treating plant diseases.

Example 2

In the present embodiment, the pesticide composition for preventing and treating plant diseases, in parts by weight, includes the following components:

3 parts of veratridine, 8 parts of thiamethoxam, 1 part of disodium hydrogen phosphate, 3 parts of metconazole, 8 parts of indazosulfamide, 1 part of Wuyamcin, 1 part of α-arosinol acetate, 0.1 part of luteolin, 3 parts of oxalic acid;

In terms of parts by weight, the auxiliary components include: 3 parts of sodium methylene dinaphthalene sulfonate, 0.5 parts of xanthan gum, 1 part of urea, 20 parts of ethanol, and 80 parts of ionized water.

The preparation method of the pesticide composition for preventing and treating plant diseases described in this example, the steps are as follows:

(1) Veratridine is dissolved in ethanol to form an alcohol solution;

(2) oxalic acid, urea, sodium methylene dinaphthalene sulfonate, disodium hydrogen phosphate and xanthan gum are dissolved in deionized water successively; an aqueous solution is formed;

(3) after mixing the alcohol solution with the aqueous solution, add thiamethoxam, metconazole, indoxapyr, and wuyamectin under the condition of stirring at 200 rpm; add 1.0% sodium lauryl sulfate, α-fragrance Resin alcohol acetate, luteolin, and adjusting the rotational speed of the emulsifier to 2000rpm for emulsification to form an emulsion;

(4) as required, use 30% citric acid aqueous solution and 30% sodium bicarbonate to adjust the pH value of the emulsion to 5, and stir to prepare the pesticide composition for preventing and treating plant diseases.

Example 3

In this example, the pesticide composition for preventing and treating plant diseases, in parts by weight, includes the following components: 1 part of veratridine, 5 parts of thiamethoxam, 2 parts of disodium hydrogen phosphate, 10 parts of metconazole, and indazole 1 part of sulfamethoxazole, 0.5 part of Wuyamectin, 0.1 part of α-arosinol acetate, 1 part of luteolin, and 5 parts of oxalic acid;

In parts by weight, the auxiliary components include: 1 part of sodium methylene dinaphthalene sulfonate, 0.05 part of xanthan gum, 0.5 part of urea, 50 parts of ethanol, and 120 parts of ionized water.

The preparation method of the pesticide composition for preventing and treating plant diseases described in this example, the steps are as follows:

(1) Veratridine is dissolved in ethanol to form an alcohol solution;

(2) oxalic acid, urea, sodium methylene dinaphthalene sulfonate, disodium hydrogen phosphate and xanthan gum are dissolved in deionized water successively; an aqueous solution is formed;

(3) after mixing the alcoholic solution with the aqueous solution, add thiamethoxam, metconazole, indoxapyr, and wuyamectin under the condition of stirring at 200 rpm; add 2.0% sodium lauryl sulfate, α-fragrance Resin alcohol acetate, luteolin, and adjusting the rotational speed of the emulsifier to 2000rpm for emulsification to form an emulsion;

(4) as required, using 40% citric acid aqueous solution and 20% sodium bicarbonate to adjust the pH value of the emulsion to 6, and ultrasonically, to prepare the pesticide composition for preventing and treating plant diseases.

Example 4

The pesticide composition for preventing and treating plant diseases in this example, in parts by weight, includes the following components: 5 parts of veratridine, 10 parts of thiamethoxam, 0.1 part of disodium hydrogen phosphate, 1 part of metconazole, and indazole 10 parts of sulfapyramide, 3 parts of Wuyimectin, 1.5 parts of α-arosinol acetate, 0.1 part of luteolin, and 1 part of oxalic acid;

In terms of parts by weight, the auxiliary components include: 3 parts of sodium methylene dinaphthalene sulfonate, 0.5 part of xanthan gum, 1 part of urea, 40 parts of ethanol, and 90 parts of ionized water.

The preparation method of the pesticide composition for preventing and treating plant diseases described in this example, the steps are as follows:

(1) Veratridine is dissolved in ethanol to form an alcohol solution;

(2) oxalic acid, urea, sodium methylene dinaphthalene sulfonate, disodium hydrogen phosphate and xanthan gum are dissolved in deionized water successively; an aqueous solution is formed;

(3) after mixing the alcoholic solution with the aqueous solution, add thiamethoxam, metconazole, indazol, and wuyamcin under the condition of stirring at 400 rpm; add 1.5% sodium dodecylbenzenesulfonate, α - balsamic resin alcohol acetate, luteolin, the rotating speed of the emulsifying machine is adjusted to 2000rpm to emulsify to form an emulsion;

(4) as required, use 40% citric acid aqueous solution and 20-30% sodium bicarbonate to adjust the pH value of the emulsion to 5, and stir to prepare the pesticide composition for preventing and treating plant diseases.

Comparative Example 1

Compared to Example 1, the only difference is that oxalic acid is not contained.

In this example, the pesticide composition for preventing and treating plant diseases, in parts by weight, includes the following components:

2 parts of veratridine, 6 parts of thiamethoxam, 0.5 part of disodium hydrogen phosphate, 6 parts of metconazole, 5 parts of indazosulfamide, 2 parts of sulfamethoxazole, 0.5 part of α-arosinol acetate, 0.5 part of luteolin;

In terms of parts by weight, the auxiliary components are the same as those in Example 1.

The preparation method of the pesticide composition for preventing and treating plant diseases described in this example, the steps are as follows:

(1) Veratridine is dissolved in ethanol to form an alcohol solution;

(2) urea, sodium methylene dinaphthalene sulfonate, disodium hydrogen phosphate and xanthan gum are dissolved in deionized water successively; an aqueous solution is formed;

(3) after mixing the alcoholic solution with the aqueous solution, add thiamethoxam, metconazole, indoxapyr, and wuyamectin under the condition of stirring at 300 rpm; add 1.2% sodium dodecylbenzenesulfonate, α - balsinol acetate, luteolin, emulsification under the condition of adjusting the rotational speed of the emulsifier to 1500rpm to form an emulsion;

(4) as required, use 35% citric acid aqueous solution and 25% sodium bicarbonate to adjust the pH value of the emulsion to 5, ultrasonically, to prepare the pesticide composition for preventing and treating plant diseases

Comparative Example 2

Compared to Example 1, the only difference is that xanthan gum is not contained.

In this example, the pesticide composition for preventing and treating plant diseases, in parts by weight, includes the following components:

2 parts of veratridine, 6 parts of thiamethoxam, 0.5 part of disodium hydrogen phosphate, 6 parts of metconazole, 5 parts of indazosulfamide, 2 parts of sulfamethoxazole, 0.5 part of α-arosinol acetate, 0.5 parts of luteolin, 2 parts of oxalic acid;

In terms of parts by weight, the auxiliary components include: 2 parts of sodium methylene dinaphthalene sulfonate, 0.6 parts of urea, 30 parts of ethanol, and 100 parts of ionized water.

The preparation method of the pesticide composition for preventing and treating plant diseases described in this example, the steps are as follows:

(1) Veratridine is dissolved in ethanol to form an alcohol solution;

(2) oxalic acid, urea, sodium methylene dinaphthalene sulfonate and disodium hydrogen phosphate are successively dissolved in deionized water; an aqueous solution is formed;

(3) after mixing the alcoholic solution with the aqueous solution, add thiamethoxam, metconazole, indoxapyr, and wuyamectin under the condition of stirring at 300 rpm; add 1.2% sodium dodecylbenzenesulfonate, α - balsinol acetate, luteolin, emulsification under the condition of adjusting the rotational speed of the emulsifier to 1500rpm to form an emulsion;

(4) as required, using 35% citric acid aqueous solution and 25% sodium bicarbonate to adjust the pH value of the emulsion to 5, and ultrasonically, to prepare the pesticide composition for preventing and treating plant diseases.

Comparative Example 3

Compared with Example 1, the only difference is that metconazole is not contained.

In this example, the pesticide composition for preventing and treating plant diseases, in parts by weight, includes the following components:

2 parts of veratridine, 6 parts of thiamethoxam, 0.5 part of disodium hydrogen phosphate, 5 parts of indazolamide, 2 parts of wuyin, 0.5 part of α-aromatic resin alcohol acetate, 0.5 part of luteolin, 2 parts of oxalic acid;

In terms of parts by weight, the auxiliary components include: 2 parts of sodium methylene dinaphthalene sulfonate, 0.1 part of xanthan gum, 0.6 part of urea, 30 parts of ethanol, and 100 parts of ionized water.

The preparation method of the pesticide composition for preventing and treating plant diseases described in this example, the steps are as follows:

(1) Veratridine is dissolved in ethanol to form an alcohol solution;

(2) oxalic acid, urea, sodium methylene dinaphthalene sulfonate, disodium hydrogen phosphate and xanthan gum are dissolved in deionized water successively; an aqueous solution is formed;

(3) after mixing the alcoholic solution with the aqueous solution, add thiamethoxam, indazolamide, and wuyamcin under the condition of stirring at 300 rpm; add 1.2% sodium dodecylbenzenesulfonate, α-aromatic resin alcohol Acetate, luteolin, and the rotating speed of the emulsifier is adjusted to 1500rpm for emulsification to form an emulsion;

(4) as required, using 35% citric acid aqueous solution and 25% sodium bicarbonate to adjust the pH value of the emulsion to 5, and ultrasonically, to prepare the pesticide composition for preventing and treating plant diseases.

Comparative Example 4

Compared with Example 1, the only difference is that metconazole and oxalic acid are not contained at the same time.

In this example, the pesticide composition for preventing and treating plant diseases, in parts by weight, includes the following components:

2 parts of veratridine, 6 parts of thiamethoxam, 0.5 part of disodium hydrogen phosphate, 5 parts of indoxsulfonamide, 2 parts of wuyin, 0.5 part of α-aromatic resin alcohol acetate, 0.5 part of luteolin;

In terms of parts by weight, the auxiliary components include: 2 parts of sodium methylene dinaphthalene sulfonate, 0.1 part of xanthan gum, 0.6 part of urea, 30 parts of ethanol, and 100 parts of ionized water.

The preparation method of the pesticide composition for preventing and treating plant diseases described in this example, the steps are as follows:

(1) Veratridine is dissolved in ethanol to form an alcohol solution;

(2) urea, sodium methylene dinaphthalene sulfonate, disodium hydrogen phosphate and xanthan gum are dissolved in deionized water successively; an aqueous solution is formed;

(3) after mixing the alcoholic solution with the aqueous solution, add thiamethoxam, indazolamide, and wuyamcin under the condition of stirring at 300 rpm; add 1.2% sodium dodecylbenzenesulfonate, α-aromatic resin alcohol Acetate, luteolin, and the rotating speed of the emulsifier is adjusted to 1500rpm for emulsification to form an emulsion;

(4) as required, using 35% citric acid aqueous solution and 25% sodium bicarbonate to adjust the pH value of the emulsion to 5, and ultrasonically, to prepare the pesticide composition for preventing and treating plant diseases.

Comparative Example 5

Compared with Example 1, the only difference is that luteolin is not contained.

In the present embodiment, the pesticide composition for preventing and treating plant diseases, in parts by weight, includes the following components:

2 parts of veratridine, 6 parts of thiamethoxam, 0.5 part of disodium hydrogen phosphate, 6 parts of metconazole, 5 parts of indazosulfamide, 2 parts of sulfamethoxazole, 0.5 part of α-arosinol acetate, 2 parts of oxalic acid;

In terms of parts by weight, the auxiliary components include: 2 parts of sodium methylene dinaphthalene sulfonate, 0.1 part of xanthan gum, 0.6 part of urea, 30 parts of ethanol, and 100 parts of ionized water.

The preparation method of the pesticide composition for preventing and treating plant diseases described in this example, the steps are as follows:

(1) Veratridine is dissolved in ethanol to form an alcohol solution;

(2) oxalic acid, urea, sodium methylene dinaphthalene sulfonate, disodium hydrogen phosphate and xanthan gum are dissolved in deionized water successively; an aqueous solution is formed;

(3) after mixing the alcoholic solution with the aqueous solution, add thiamethoxam, metconazole, indoxapyr, and wuyamectin under the condition of stirring at 300 rpm; add 1.2% sodium dodecylbenzenesulfonate, α - aromatic resin alcohol acetate, the rotating speed of the emulsifying machine is adjusted to 1500rpm to emulsify to form an emulsion;

(4) as required, using 35% citric acid aqueous solution and 25% sodium bicarbonate to adjust the pH value of the emulsion to 5, and ultrasonically, to prepare the pesticide composition for preventing and treating plant diseases.

Comparative Example 6

Compared with Example 1, the difference is only in the preparation method.

The pesticide composition for preventing and treating plant diseases in this example has the same components as in Example 1.

The preparation method of the pesticide composition for preventing and treating plant diseases described in this example, the steps are as follows:

(1) Veratridine is dissolved in ethanol to form an alcohol solution;

(2) oxalic acid, urea, sodium methylene dinaphthalene sulfonate, disodium hydrogen phosphate and xanthan gum are dissolved in deionized water successively; an aqueous solution is formed;

(3) after mixing the alcoholic solution with the aqueous solution, add thiamethoxam, metconazole, indoxapyr, and wuyamectin under the condition of stirring at 300 rpm; add 1.2% sodium dodecylbenzenesulfonate, α - balsinol acetate, luteolin, emulsification under the condition of adjusting the rotational speed of the emulsifier to 1500rpm to form an emulsion;

(4) as required, using 35% acetic acid aqueous solution and 25% sodium bicarbonate to adjust the pH value of the emulsion to 5, and ultrasonically, to prepare the pesticide composition for preventing and treating plant diseases.

Example of effect

1. Activity inhibition test of cucumber powdery mildew

Divide the test into 10 groups to carry out, namely embodiment 1-3, comparative example 1-6, control group respectively; When the cucumber cotyledons are fully expanded, the cotyledons are placed in vitro in a petri dish of water agar, and 6 pieces per dish are placed. The medicines were applied under the micro-spray (the compositions were applied to the corresponding groups according to the groups, and the control group was applied with water), and the spray amount was 5ml. After drying in the shade, inoculate fresh cucumber powdery mildew conidia suspension with a micro-injector, the inoculum amount is 5 μl in the center of each leaf, incubate in the dark at 25 ° C for 24 hours, and then illuminate for 192 hours, and then investigate the incidence, the activity inhibition rate % =(area of control lesions−area of treated lesions)/area of control lesions×100. The test results are shown in Table 1.

Table 1 Activity inhibition rate of cucumber powdery mildew

test group Activity inhibition rate of cucumber powdery mildew control group 13.1±3.5^a Example 1 92.3±6.8^b Example 2 90.6±4.7^b Example 3 91.7±8.9^b Comparative Example 1 79.4±13.6^c Comparative Example 2 75.1±10.2^c Comparative Example 3 80.3±9.6^c Comparative Example 4 72.5±12.5^d Comparative Example 5 67.8±7.5^c Comparative Example 6 62.5±10.6^c

Note: There are significant differences among different letters, p<0.05.

Therefore, it can be seen that the pesticide composition provided by the present invention has a better inhibition rate of cucumber powdery mildew activity, and its composition and its preparation method have an important influence on its efficacy.

2. Field control effect test

5 parts of the compositions corresponding to Examples 1-3 and Comparative Examples 1-6 were mixed with 10 parts of WPA-9503 compounding adjuvant and 85 parts of kaolin to obtain a wettable powder with an active ingredient of 5% as the test agent , to determine its field control effect on cucumber downy mildew and tomato Rhizoctonia solani. The results are shown in Table 2. The field control time was 7 days after the seedlings were unearthed, 2 times in total, the dosage of the preparation was 50 grams per mu, and the application multiple was 500 times.

Table 2 Field control effect test data

test group Cucumber Downy Mildew Control % Tomato Rhizoma Rhizoctonia Control % Example 1 95.7 91.5 Example 2 94.7 91.9 Example 3 95.1 90.8 Comparative Example 1 81.8 72.1 Comparative Example 2 74.5 68.7 Comparative Example 3 76.4 71.5 Comparative Example 4 71.6 63.2 Comparative Example 5 63.3 59.7 Comparative Example 6 68.1 66.5

It can be seen that the pesticide composition provided by the present invention has better control effect on cucumber downy mildew and tomato R. solani, and its composition and preparation method have an important influence on its medicinal effect.

The above detailed description is a specific description of one of the feasible embodiments of the present invention, which is not intended to limit the scope of the present invention. Any equivalent implementation or modification that does not depart from the present invention shall be included in the present invention. within the scope of the technical solution.

Claims (10)

1. A pesticide composition for controlling plant diseases comprises the following components:

veratrine, thiamethoxam, disodium hydrogen phosphate, metconazole, amisulbrom, wuyiencin, α -coumarol acetate, luteolin and oxalic acid.

2. The pesticide composition for controlling plant diseases according to claim 1, which comprises, by weight, 1-5 parts of veratrine, 5-10 parts of thiamethoxam, 0.1-2 parts of disodium hydrogen phosphate, 1-10 parts of metconazole, 1-10 parts of amisulbrom, 0.5-3 parts of wuyiencin, 0.1-1.5 parts of α -resinol acetate, 0.1-1 part of luteolin and 1-5 parts of oxalic acid.

3. The pesticide composition for controlling plant diseases according to claim 1, which comprises, by weight, 2-3 parts of veratrine, 6-8 parts of thiamethoxam, 0.5-1 part of disodium hydrogen phosphate, 3-6 parts of metconazole, 5-8 parts of amisulbrom, 1-2 parts of wuyiencin, 0.5-1.0 part of α -coumarol acetate, 0.1-0.5 part of luteolin and 2-3 parts of oxalic acid.

4. A pesticidal composition for controlling plant diseases according to claim 1, characterized in that the pesticidal composition of the present invention further comprises various auxiliary components which are allowed to be used and acceptable in pesticides.

5. The pesticidal composition for controlling plant diseases according to claim 4, characterized in that the auxiliary components comprise: sodium methylene dinaphthalene sulfonate, xanthan gum, urea, ethanol and deionized water.

6. The pesticidal composition for controlling plant diseases according to claim 5, characterized in that the auxiliary components comprise, in parts by weight: 1-3 parts of methylene dinaphthalene sodium sulfonate, 0.05-0.5 part of xanthan gum, 0.5-1 part of urea, 20-50 parts of ethanol and 80-120 parts of ionized water.

7. The process for producing a pesticidal composition for controlling plant diseases according to any one of claims 5 to 6, characterized by comprising the steps of:

(1) dissolving veratrine in ethanol to form an alcohol solution;

(2) sequentially dissolving oxalic acid, urea, sodium methylene dinaphthalene sulfonate, disodium hydrogen phosphate and xanthan gum in deionized water; forming an aqueous solution;

(3) mixing the alcohol solution with the water solution, adding thiamethoxam, metconazole, amisulbrom and wuyiencin under stirring, adding an emulsifier, α -cuminol acetate and luteolin, and emulsifying to form an emulsion;

(4) adjusting the pH value of the emulsion, and carrying out ultrasonic treatment or stirring to obtain the pesticide composition for preventing and treating plant diseases.

8. The method for preparing a pesticidal composition for controlling plant diseases according to claim 7, wherein in the step (3), the rotation speed of the stirring is 200-500 rpm; the emulsification is carried out in an emulsifying machine, and the rotating speed of the emulsifying machine is adjusted to be 1000-2000 rpm.

9. The method for preparing a pesticidal composition for controlling plant diseases according to claim 7, wherein in the step (4), the pH is adjusted using citric acid-sodium bicarbonate; the pH value is 5-6.

10. The use of the pesticidal composition according to any one of claims 1 to 6 or the pesticidal composition prepared by the method for preparing the pesticidal composition according to any one of claims 7 to 9 in a medicament for controlling a plant disease.