Agricultural pesticide residue reducing agent as well as preparation method and application thereof

Abstract

The invention discloses an agricultural pesticide residue reducing agent as well as a preparation method and application thereof. Every 1kg of the agricultural pesticide residue reducing agent comprises the following components: 18-250g of cyclodextrin, 10-30g of composite sodium bicarbonate, 18-22g of citric acid, 1-7g of sodium copper chlorophyllin and the balance of water. The preparation method of the agricultural pesticide residue reducing agent comprises the following operation steps: S1, dissolving cyclodextrin with water, mixing the dissolved cyclodextrin with sodium copper chlorophyllin, and heating to 30-40 DEG C; s2, then adding composite sodium bicarbonate dissolved with water, and heating to 45-60 DEG C; and S3, finally adding citric acid, stirring and mixing, supplementing water to 1 kg, and fully dissolving for 1-8 hours to obtain the agricultural pesticide residue reducing agent. The obtained agricultural pesticide residue reducing agent can rapidly and effectively reduce the pesticide residues on the surfaces of fruits and vegetables in different periods, and is more efficient, safer, environmentally friendly and low in toxic and side effects during use.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural pesticide residue reducers, in particular to an agricultural pesticide residue reducer and a preparation method and application thereof. Background Art

[0002] There are many types of pesticides. Pesticides used for crop spraying include insecticides, fungicides, herbicides, miticides and plant growth regulators. Pesticides effectively resist the invasion of pests, weeds and pathogens on crops through their multiple functions such as insecticide, weed killer and fungicide, thus ensuring the healthy growth and high yield and quality of crops. In agricultural production, the widespread use of pesticides has effectively improved the yield and quality of crops, but it has also brought about the problem of pesticide residues. Pesticide residues not only threaten the health of consumers, but also have an impact on the environment that cannot be ignored.

[0003] Therefore, developing an efficient and safe agricultural pesticide residue reducer has become an important research direction in the field of agricultural science and technology. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an agricultural pesticide residue reducer and a preparation method and application thereof. The agricultural pesticide residue reducer obtained by the method can quickly and effectively reduce the surface pesticide residues of fruits and vegetables at different periods, and is more efficient, safe, environmentally friendly and has low toxic side effects when used.

[0005] The present invention solves the above technical problems with the following technical solutions:

[0006] The agricultural pesticide residue reducer of the present invention contains the following components in every 1 kg of the agricultural pesticide residue reducer: 18-250 g of cyclodextrin, 10-30 g of complex sodium bicarbonate, 18-22 g of citric acid, 1-7 g of sodium copper chlorophyll, and the balance is water.

[0007] The preparation method of the agricultural pesticide residue reducing agent of the present invention is as follows:

[0008] S1. Dissolve cyclodextrin in water, mix with sodium copper chlorophyllin and heat to 30-40 degrees;

[0009] S2, then add the composite sodium bicarbonate dissolved in water and heat to 45-60 degrees;

[0010] S3. Finally, add citric acid, stir and mix, and then add water to 1 kg and allow it to fully dissolve for 1-8 hours to obtain the agricultural pesticide residue reducer.

[0011] In steps S1 and S2 of the present invention, the amount of water used to dissolve cyclodextrin and composite sodium bicarbonate is preferably sufficient to achieve dissolution.

[0012] Application of the agricultural pesticide residue reducer of the present invention: after diluting the agricultural pesticide residue reducer with water by 10-100 times, it is used for degrading pesticides in fruits and vegetables at different stages.

[0013] The present invention has the following advantages:

[0014] (1) The agricultural pesticide residue reducer obtained by the present invention can quickly reduce the amount of pesticide residues on the surfaces of fruits and vegetables at different times, and is efficient, safe, environmentally friendly and has low toxic side effects when used.

[0015] (2) The agricultural pesticide residue reducer obtained by the present invention has the advantages of being environmentally friendly and easy to operate, and can be easily and quickly dissolved in agricultural spraying water to remove pesticide residues.

[0016] (3) The agricultural pesticide residue reducer prepared by the present invention can be used in a wide range of dosage adjustments. During the test, the agent was diluted and added to an aqueous solution containing pesticides to degrade the pesticides. After 24 hours of degradation, the pesticide residue reduction rate was 21.5%-95.2%. The pesticide residue reducer is water-soluble, can be decomposed in the soil, and is safe to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The agricultural pesticide residue reducer prepared by the present invention is sprayed on the surface of blueberries soaked in 25 mg / L of lambda-cyhalothrin and illuminated for 24 hours. The gas chromatographic image obtained is that the effective peak is at a retention time of 16 minutes. According to the area normalization method, the pesticide residue on the surface of the blueberries sprayed in Example 1 is reduced from 100% to 78.5%.

[0018] Figure 2 The gas chromatographic image obtained after the agricultural pesticide residue reducer prepared by the present invention was sprayed on the surface of blueberries soaked in 25 mg / L of lambda-cyhalothrin and illuminated for 24 hours, and the effective peak was at a retention time of 16 minutes. According to the area normalization method, the pesticide residue on the surface of the blueberries sprayed in Example 2 was reduced from 100% to 4.8%.

[0019] Figure 3 The gas chromatographic image obtained after the agricultural pesticide residue reducer prepared by the present invention was sprayed on the surface of blueberries soaked in 25 mg / L of lambda-cyhalothrin and illuminated for 24 hours, and the effective peak was at a retention time of 16 minutes. According to the area normalization method, the pesticide residue on the surface of the blueberries sprayed in Example 3 was reduced from 100% to 46.9%. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further described below in conjunction with embodiments:

[0021] Embodiment 1

[0022] The agricultural pesticide residue reducer of the present invention contains the following components per 1 kg of the agricultural pesticide residue reducer: 18 g of beta-cyclodextrin, 10 g of complex sodium bicarbonate, 18 g of citric acid and 1 g of sodium copper chlorophyllin, and the balance is water.

[0023] The preparation method of the above agricultural pesticide residue reducer comprises the following steps:

[0024] S1. Add 18g of β-cyclodextrin to 100g of water to dissolve, mix with 1g of sodium copper chlorophyllin, and heat to 30 degrees;

[0025] S2. Dissolve 10 g of composite sodium bicarbonate in 100 g of water and add it to the mixture of step S1, and heat it to 45 degrees; S3. Finally, add 18 g of citric acid, stir the mixed solution, add water to 1 kg, and allow it to fully dissolve for 1 hour to obtain an agricultural pesticide residue reducer.

[0026] When applied, the agricultural pesticide residue reducer is diluted 10 times with water and used to remove pesticides. Taking blueberries sprayed with 25 mg / L highly effective chlorfenapyr aqueous solution as an example, the pesticide residue rate can be reduced from 100% to 78.5%.

[0027] Embodiment 2

[0028] The agricultural pesticide residue reducer of the present invention contains the following components per 1 kg of the agricultural pesticide residue reducer: 250 g of gamma-cyclodextrin, 20 g of complex sodium bicarbonate, 22 g of citric acid and 7 g of sodium copper chlorophyllin, and the balance is water.

[0029] The preparation method of the above agricultural pesticide residue reducer comprises the following steps:

[0030] S1. Add 250g of γ-cyclodextrin to 200g of water to dissolve, mix with 7g of sodium copper chlorophyllin, and heat to 40 degrees;

[0031] S2. Dissolve 20 g of composite sodium bicarbonate in 200 g of water and add it to the mixture of step S1, and heat it to 50 degrees; S3. Finally, add 22 g of citric acid, stir the mixed solution, add water to 1 kg, and allow it to fully dissolve for 8 hours to obtain an agricultural pesticide residue reducer.

[0032] When applied, the agricultural pesticide residue reducer is diluted 100 times with water and used to remove pesticides. Taking blueberries sprayed with 25 mg / L highly effective chlorfenapyr aqueous solution as an example, the pesticide residue rate can be reduced from 100% to 4.8%.

[0033] Embodiment 3

[0034] The agricultural pesticide residue reducer of the present invention contains the following components per 1 kg of the agricultural pesticide residue reducer: 150 g of gamma-cyclodextrin, 15 g of complex sodium bicarbonate, 20 g of citric acid and 5 g of sodium copper chlorophyllin, and the balance is water.

[0035] The preparation method of the above agricultural pesticide residue reducer comprises the following steps:

[0036] S1. Add 150g of γ-cyclodextrin to 300g of water to dissolve, mix with 5g of sodium copper chlorophyllin, and heat to 40 degrees;

[0037] S2. Dissolve 15 g of composite sodium bicarbonate in 300 g of water and add it to the mixture of step S1, and heat it to 60 degrees; S3. Finally, add 20 g of citric acid, stir the mixed solution, add water to 1 kg, and allow it to fully dissolve for 3 hours to obtain an agricultural pesticide residue reducer.

[0038] When used, the agricultural pesticide residue reducer is diluted 50 times with water and used to remove pesticides. Taking blueberries sprayed with 25 mg / L highly effective chlorfenapyr aqueous solution as an example, the pesticide residue rate can be reduced from 100% to 46.9%.

[0039] The specific operation process of the pesticide removal test is as follows:

[0040] S1. Prepare a 25 mg / L cyhalothrin aqueous solution, soak blueberries in it for 5 minutes, then take them out and dry them for testing;

[0041] S2, spraying the diluted agricultural pesticide residue reducers of Example 1, Example 2 and Example 3 uniformly on the surface of an equal number of blueberries (blueberries to be tested), drying them, and irradiating them under a fluorescent lamp for 24 hours, and placing blueberries not sprayed with the pesticide residue reducers next to them as a control group;

[0042] S3, washing the surface of blueberries with an equal volume of ethyl acetate, and detecting them by gas chromatography;

[0043] S4. Obtain data, and according to the area normalization method, the pesticide residue on the surface of blueberries sprayed in Example 1 is reduced from 100% to 78.5%, the pesticide residue on the surface of blueberries sprayed in Example 2 is reduced from 100% to 4.8%, and the pesticide residue on the surface of blueberries sprayed in Example 3 is reduced from 100% to 46.9%. Figure 1-3 shown.

Claims

1. An agricultural pesticide residue reducer, characterized in that: The components contained in every 1 kg of agricultural pesticide residue reducer are as follows: 18-250 g of cyclodextrin, 10-30 g of complex sodium bicarbonate, 18-22 g of citric acid, 1-7 g of sodium copper chlorophyll, and the balance is water.

2. The method for preparing the agricultural pesticide residue reducer according to claim 1, characterized in that: The method comprises the following steps: S1. Dissolve cyclodextrin in water, mix with sodium copper chlorophyllin and heat to 30-40 degrees; S2, then add the composite sodium bicarbonate dissolved in water and heat to 45-60 degrees; S3. Finally, add citric acid, stir and mix, and then add water to 1 kg and allow it to fully dissolve for 1-8 hours to obtain the agricultural pesticide residue reducer.

3. The method for preparing the agricultural pesticide residue reducer according to claim 2, characterized in that: In the steps S1 and S2, the amount of water used to dissolve the cyclodextrin and the composite sodium bicarbonate is appropriate to achieve dissolution.

4. The use of the agricultural pesticide residue reducer according to any one of claims 1 to 3, characterized in that: After diluting the agricultural pesticide residue reducer 10-100 times with water, it is used to degrade pesticides in fruits and vegetables at different stages.

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