Spinosad and chlopyrifos compound microsphere suspending agent and preparation method thereof

A spinosyn and chlorpyrifos technology, applied in botanical equipment and methods, insecticides, biocides, etc., can solve the problems of high prevention and control costs, large environmental pollution, and low prevention and control costs, and achieve outstanding control effects and insecticidal effects. Broad spectrum, the effect of reducing pollution

Inactive Publication Date: 2013-04-10
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a combination of spinosad and chlorpyrifos for the shortcomings of previous spinosad or chlorpyrifos single agent, which are easy to decompose when exposed to light, poor stability, large environmental pollution, short duration, and high control cost. Formulated with microsphere suspending agent and its preparation method, it has broad prevention and control spectrum, high drug efficacy, strong stability, little environmental pollution, long-lasting effect, low prevention and control cost, and meets the requirements of pollution-free agricultural production

Method used

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  • Spinosad and chlopyrifos compound microsphere suspending agent and preparation method thereof
  • Spinosad and chlopyrifos compound microsphere suspending agent and preparation method thereof
  • Spinosad and chlopyrifos compound microsphere suspending agent and preparation method thereof

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preparation example Construction

[0040] The concrete steps of the preparation method of this spinosad chlorpyrifos microsphere suspension are as follows:

[0041] The preparation method of spinosad chlorpyrifos microspheres: raw material proportioning is weighed respectively, and certain quality spinosad chlorpyrifos technical substance and polylactic acid mixed in proportion are dissolved in dichloromethane, sealed with plastic wrap and placed in an ice water bath In the process, after the two are fully dissolved (weigh before and after dissolving to make up for the lost dichloromethane), inject a certain amount of emulsifier and 0.05% volume percentage of the SPAN-80 aqueous solution with a syringe, and use Emulsify with a high-speed internal cutting homogenizer at 2800-4500 r / min for 0.2-1.0 min to obtain primary emulsion, add about 0.3 mL of silicone defoamer, and quickly pour the resulting solution into a magnetic stirrer equipped with 1 L of water In a large beaker, keep the reaction temperature at 30 °...

Embodiment 1

[0060] Raw material ratio is weighed respectively, 0.4g is by mass ratio (m 多素 : m 毒 =1 : 20) Dissolve the mixed spinosad chlorpyrifos technical product and 1.2g polylactic acid in 10mL of dichloromethane, seal it with plastic wrap and place it in an ice water bath. Make up for the lost dichloromethane), inject the drug solution into 200mL, 17.5mg / mL gum arabic and 0.05% by volume SPAN-80 aqueous solution with a syringe, and emulsify with a high-speed internal cutting homogenizer at 4000 r / min After 0.5 min, the initial emulsion was prepared, and about 0.3 mL of silicone defoamer was added, and the resulting solution was quickly poured into a large beaker with 1 L of water on a magnetic stirrer, and the reaction temperature was kept at 30 °C. Stir at high speed at r / min until there is no smell of dichloromethane. Centrifuge, filter and separate the solids and place them in a constant temperature drying oven at 40 ℃ to dry, that is spinosad · chlorpyrifos microspheres.

[...

Embodiment 2

[0064] Raw material ratio is weighed respectively, 0.4g is by mass ratio (m 多素 : m 毒 =1 : 13) Dissolve the mixed spinosad chlorpyrifos technical product and 1.2g polylactic acid in 10mL of dichloromethane, seal it with plastic wrap and place it in an ice water bath. Make up for the lost dichloromethane), inject the drug solution into 200mL, 17.5mg / mL gum arabic and 0.05% by volume SPAN-80 aqueous solution with a syringe, and emulsify with a high-speed internal homogenizer at 3500 r / min After 0.5 min, the initial emulsion was prepared, and about 0.3 mL of silicone defoamer was added, and the resulting solution was quickly poured into a large beaker with 1 L of water on a magnetic stirrer, and the reaction temperature was kept at 30 °C. Stir at high speed at r / min until there is no smell of dichloromethane. Centrifuge, filter and separate the solids, and dry them in a constant temperature drying oven at 40°C, namely spinosad chlorpyrifos microspheres.

[0065] Take a certa...

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Abstract

The invention discloses a spinosad and chlopyrifos compound microsphere suspending agent and a preparation method thereof, and belongs to the technical field of pesticide production. The preparation method comprises the steps of taking spinosad and chlopyrifos as active substances, namely core materials, taking biodegradable polylactic acid as a sphere forming material, namely a wall material, dissolving the core materials and the wall material in a recoverable volatile organic solvent, preparing spinosad and chlopyrifos compound microspheres by a modified emulsification-solvent volatilization/extraction method, and preparing the spinosad and chlopyrifos compound microsphere suspending agent with stable performances with a wetting disperser, a thickener, an antifreezer, an antifoaming agent and water. In the compound microsphere suspending agent, the compounding ratio of the spinosad to the chlopyrifos has an obvious synergetic effect according to an indoor pesticide toxicity test, and as the suspending agent is wrapped by polylactic acid, the suspending agent has the advantages of safety, low toxicity, high efficiency, long lasting period, good stability and the like.

Description

technical field [0001] The invention belongs to the technical field of pesticide production, and in particular relates to a spinosad and chlorpyrifos compound microsphere suspension and a preparation method thereof. Background technique [0002] Research on pesticide compound preparations is of great significance for prolonging the service life of new pesticide varieties, alleviating the resistance of target organisms, expanding the control spectrum, reducing control costs, improving drug efficacy and environmental safety, etc. Therefore, countries all over the world attach great importance to the research on pesticide mixtures. For example, between 1975 and 1976, among the more than 5,000 kinds of pesticide preparations sold in the North American market, there were about 1,000 mixtures; by the end of 1999, there were about 2,232 mixtures temporarily registered in the Pesticide Control Institute of the Ministry of Agriculture of my country. (times), accounting for 52.7%. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N57/16A01N43/22A01N25/04A01P7/04
Inventor 吴刚刘德坤张少飞杨石有张翠
Owner FUJIAN AGRI & FORESTRY UNIV
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