Preparation method of coated slow-release granular pesticide

A technology of coating slow-release and pesticides, which is applied in the fields of botanical equipment and methods, insecticides, animal repellents, etc. Release speed reduction effect

Inactive Publication Date: 2015-06-24
QINGDAO XINRUNTU NURSERY STOCK SPECIALIZED COOP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effective rate of conventional pesticides is only 20-30%, and the loss rate through various channels is very high, which is not only a waste in the economy, but also causes serious environmental pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing coated sustained-release granular pesticides, characterized in that it comprises the steps of:

[0019] (1) Starch gelatinization: Weigh the mixture of nitrate starch and hydroxymethyl starch at a weight ratio of 1:1, add an equal volume of wheat husk powder, and prepare a modified starch aqueous suspension with a mass-volume concentration of 15%. , control the temperature at 60°C for gelatinization for 20 minutes;

[0020] (2) Adding active ingredients: Add 4% active ingredients of pesticides, 4% imidacloprid, 5% urea and potassium carbonate water-soluble substances in a weight ratio of 3:1 to the above pasting liquid, and control the temperature at 85°C. Stir for 25min at a speed of 600r / min under high-speed shear stirring conditions;

[0021] (3) Prepare powdery additives: take Toosendan bark, diatomaceous earth and peat in a weight ratio of 3:2:0.5 and mix them, then ultrafinely pulverize them to 500 mesh;

[0022] (4) Granulation: Add the p...

Embodiment 2

[0024] A method for preparing coated sustained-release granular pesticides, characterized in that it comprises the steps of:

[0025] (1) Starch gelatinization: Weigh the mixture of nitrate starch and hydroxymethyl starch at a weight ratio of 1:1, add an equal volume of wheat husk powder, and prepare a modified starch aqueous suspension with a mass-volume concentration of 20%. , control the temperature at 70°C for gelatinization for 15 minutes;

[0026] (2) Adding active ingredients: Add 6% active ingredients of pesticides, 6% imidacloprid, 8% urea and potassium carbonate water-soluble substances in a weight ratio of 3:1 to the above pasting liquid, and control the temperature at 90°C. Stir for 20min at a speed of 700r / min under high-speed shear stirring conditions;

[0027] (3) Prepare powdery additives: take Toosendan bark, diatomaceous earth and calcium carbonate according to the weight ratio of 3:2:0.5 and mix them, then ultrafinely pulverize them to 530 mesh;

[0028] (...

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PUM

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Abstract

The invention discloses a preparation method of a coated slow-release granular pesticide. The preparation method is characterized by comprising 1, starch gelatinization, 2, active component addition, 3, powdery additive addition, and 4, granulation. The coated slow-release granular pesticide contains two insecticidal components such as imidacloprid and toosendanin and has substantial insecticidal effects. The preparation method utilizes modified starch gelatinization and coating of a polymer film on surfaces of fertilizer particles. The powdery additive can make the pesticide extruded pellet composition stable and form a lot of minimal pores. The coated slow-release granular pesticide has controllable adsorption capability and pesticide release time so that a pesticide release speed is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of pesticide production, and in particular relates to a method for preparing coated slow-release granular pesticides. Background technique [0002] Imidacloprid is a super-efficient neonicotinoid insecticide with broad-spectrum, high efficiency, low toxicity, and low residue. It is not easy for pests to develop resistance, and it is safe for humans, animals, plants, and natural enemies. It also has contact, stomach, and systemic toxicity. and other multiple functions. After the pests are exposed to the pesticide, the normal conduction of the central nervous system is blocked, causing them to paralyze and die. The product is quick-acting, and has a high control effect one day after application, and the residual period is as long as about 25 days. The efficacy and temperature are positively correlated, the higher the temperature, the better the insecticidal effect. [0003] Toosendanin, as a botanical i...

Claims

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Application Information

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IPC IPC(8): A01N51/00A01N25/26A01P7/04A01N43/16
Inventor 刘泽华
Owner QINGDAO XINRUNTU NURSERY STOCK SPECIALIZED COOP
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