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Method for preparing biological pesticide spinosad microcapsule preparation

A spinosyn and biological pesticide technology, applied in the field of preparation of biological pesticide spinosyn microcapsule formulations, can solve problems such as unfavorable ecological environment, reduced drug efficacy, increased application amount, etc., and achieves simple process, low equipment investment, controllable The effect of pollution

Active Publication Date: 2010-08-18
ACAD OF NAT FOOD & STRATEGIC RESERVES ADMINISTRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing the spinosad microcapsule preparation of the biopesticide, the spinosad microcapsule preparation prepared by the preparation method overcomes that the existing spinosad preparation is easily degraded by light, and makes its drug effect Reduce and increase the amount of spraying, disadvantages to the ecological environment

Method used

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  • Method for preparing biological pesticide spinosad microcapsule preparation
  • Method for preparing biological pesticide spinosad microcapsule preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Accurately weigh 24.0g of urea and add it to a three-necked flask, measure 40mL of 37% formaldehyde solution, stir at a speed of 1000r / min, stir until the urea is completely dissolved, add triethanolamine to adjust the pH to 8.0, gradually raise the temperature to 70°C, and keep stirring The speed and temperature are constant, and the reaction is stopped after 1 hour to form a viscous transparent liquid. Then, add distilled water about 2 times the volume of the formaldehyde solution to dilute to obtain a stable aqueous solution of urea-formaldehyde resin prepolymer.

[0024] Dissolve 1.0 g of spinosad in 10 mL of chloroform completely at room temperature, then add 15 mL of petroleum ether, stir and mix well, then add 70 mL of 0.7% by mass sodium lauryl sulfate aqueous solution as an emulsifier, Stir at 1000r / min for 10min to fully disperse and emulsify the capsule core. Then, add 75mL of the above-mentioned urea-formaldehyde resin prepolymer solution, 1000-2000r / min, co...

Embodiment 2

[0027] Accurately weigh 40.0g of urea and add it to a three-necked flask, measure 100mL of 37% formaldehyde solution, stir at a speed of 1000r / min, stir until the urea is completely dissolved, add triethanolamine to adjust the pH to 8.0, gradually raise the temperature to 70°C, and keep stirring The speed and temperature are constant, and the reaction is stopped after 1 hour to form a viscous transparent liquid. Then, add distilled water about 2 times the volume of the formaldehyde solution to dilute to obtain a stable aqueous solution of urea-formaldehyde resin prepolymer.

[0028] Dissolve 1.5g of spinosad in 25mL of chloroform completely at room temperature, then add 35mL of petroleum ether, stir and mix thoroughly, then add 120mL of styrene-maleic anhydride copolymer with a mass percentage of 0.7% as an emulsifier , Stir at 1000r / min for 10min to fully disperse and emulsify the capsule core. Then, add 240mL of the above-mentioned urea-formaldehyde resin prepolymer solution...

Embodiment 3

[0031] Accurately weigh 36.0g of urea and add it to a three-necked flask, measure 60mL of 37% formaldehyde solution, stir at a speed of 1000r / min, stir until the urea is completely dissolved, add NaOH solution to adjust the pH to 8.5, gradually raise the temperature to 80°C, and keep stirring The speed and temperature are constant, and the reaction is stopped after 1 hour to form a viscous transparent liquid. Then, add distilled water about 2 times the volume of the formaldehyde solution to dilute to obtain a stable aqueous solution of urea-formaldehyde resin prepolymer.

[0032]Dissolve 1.0g spinosad in 30mL petroleum ether completely at room temperature, stir and mix thoroughly, add 0.1% by mass sodium dodecylbenzenesulfonate aqueous solution 120mL as emulsifier, stir at 1000r / min for 10min, Fully disperse and emulsify the capsule core. Then, add 150mL of the above-mentioned urea-formaldehyde resin prepolymer solution, 1000-2000r / min, continue to stir for 15min, then reduce ...

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Abstract

The invention relates to a method for preparing biological pesticide spinosad microcapsule preparation, which comprises preparation of urea-formaldehyde prepolymer solution, preparation of spinosad mixture solution and preparation of spinosad microcapsule. The microcapsule preparation technique is simple and convenient, easy to control, stable in reaction, less in auxiliary additive, low in production cost and suitable for industrialized production. The spinosad prepared by the method has high coating efficiency, is not damaged by rainwater or does not have degradation phenomenon after being irradiated by light, has long slow release period, and prolongs the pest control period, thus not only improving the control effect, but also reducing the environmental pollution.

Description

technical field [0001] The invention relates to a method for preparing a biopesticide spinosyn microcapsule preparation, which belongs to the technical field of pesticide preparation. Background technique [0002] The annual loss of global crops due to the threat of pests and diseases is about 1 / 3. At present, chemical pesticides still account for most of the market in the prevention and control of pests and diseases. With the extensive, long-term and repeated use of chemical pesticides, it not only causes huge pollution to soil, water and the atmosphere, but also directly endangers human health due to the increase of pesticide residues in agricultural by-products. Therefore, the development of safe, ecologically sustainable and environmentally friendly biopesticides has received widespread attention. [0003] Spinosad is another kind of high-efficiency broad-spectrum insecticide after abamectin. It has both the safety of biological pesticides and the rapid effectiveness o...

Claims

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Application Information

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IPC IPC(8): A01N43/22A01N25/28A01P7/00
Inventor 张晓琳秦为辉李能威郭伟群汪洋陈新
Owner ACAD OF NAT FOOD & STRATEGIC RESERVES ADMINISTRATION
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