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Functional slow-release suspension seed-coating agents

A functional, slow-release technology, applied in the direction of seed coating/seed dressing, biocide, biocide, etc., can solve the problems of exposure to phytotoxicity and being easily affected by external adverse factors.

Inactive Publication Date: 2009-04-29
INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the seeds are sensitive to the surrounding environmental conditions during the germination stage and the seedling stage, and are easily affected by external unfavorable factors, such as low temperature, direct contact with pesticides, etc.

Method used

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  • Functional slow-release suspension seed-coating agents
  • Functional slow-release suspension seed-coating agents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The first step Microencapsulation

[0037] (1) Water phase preparation: add emulsion stabilizer hydroxyethyl cellulose (FD 2000) into deionized water, prepare 80 ml of 1.2% aqueous solution, then add 2.0 g of emulsifier 0203, stir to dissolve it completely

[0038] (2) Organic phase preparation: mix 1 gram of polymethyl methacrylate and 1 gram of tebuconazole in 20 ml of dichloromethane, stir to fully dissolve and mix well

[0039] (3) Emulsification: Pour the organic phase of dichloromethane containing polymethyl methacrylate and tebuconazole into the water phase, high-speed shear emulsification until the droplet diameter of the emulsion is below 5 microns, and the solution is a white emulsion . In the process of high-speed shear emulsification, if the temperature of the emulsion rises too fast, it can be properly cooled with an ice bath to reduce the volatilization of organic solvents

[0040] (4) Microencapsulation: Stir the above emulsion at room temperature (mech...

Embodiment 2

[0044] The first step Microencapsulation

[0045] (1) Water phase preparation: Add the emulsion stabilizer hydroxyethyl cellulose (FD 2000) into deionized water to prepare 75.5 ml of 1.2% aqueous solution, then add 2.0 g of emulsifier 1601, and stir to dissolve it completely

[0046] (2) Organic phase preparation: put 3.0 grams of polystyrene and 3.0 grams of difenoconazole in 50 milliliters of dichloromethane, stir to fully dissolve and mix well

[0047] (3) Emulsification: Pour the dichloromethane organic phase containing polystyrene and difenoconazole into the water phase, high-speed shear emulsification and emulsification under ice bath cooling until the droplet diameter of the emulsion is below 5 microns, and the solution white emulsion

[0048] (4) Microencapsulation: Stir the above emulsion at room temperature (mechanical stirring), during which dichloromethane gradually volatilizes, and after 4 hours, gradually raise the reaction temperature to 40°C to completely remo...

Embodiment 3

[0052] The first step Microencapsulation

[0053] (1) Water phase preparation: Add the emulsion stabilizer hydroxypropyl cellulose to deionized water to prepare 73.0 ml of 1.8% aqueous solution, then add 2.0 g of emulsifier 603 and 0.7 g of emulsifier 500#, and stir to dissolve it completely

[0054] (2) Organic phase preparation: put 3 grams of polystyrene-maleic anhydride alternating copolymer and 3 grams of myclobutanil in 50 milliliters of butyl acetate, stir to make it fully dissolved

[0055] (3) Emulsification: Pour the butyl acetate organic phase containing polystyrene-maleic anhydride alternating copolymer and myclobutanil into the water phase, and emulsify under high-speed shear emulsification until the droplet diameter of the emulsion is Below 5 microns, the solution is white emulsion

[0056] (4) Microencapsulation: Stir the above emulsion at room temperature (mechanical stirring), stir under reduced pressure at 10mm Hg for 3 hours, gradually increase the reaction...

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Abstract

The present invention release to a suspend seed-coat agent which is prepared by following steps of encapsulizting triazole fungicides, and making the micro-capsule coved with active components into suspend seed-coat agent. The micro-capsule suspend seed-coat agent has slowly-releasing function and can prevent triazole fungicides seed coat from generating drug misadventures, specially, the drug misadventure under low temperature stress.

Description

technical field [0001] The invention relates to an agricultural microcapsule suspension seed coating agent with sustained release function. Background technique [0002] In agricultural crop protection measures, seed coating is a very effective method for preventing and controlling plant diseases and insect pests. Compared with other control measures, seed coating technology has the advantages of high efficacy, good environmental compatibility, and high effective utilization rate of pesticides. advantage. Whether it is small-scale manual coating or large-scale mechanical coating in the factory, the seeds used in one hectare of land can be coated in a few minutes or even less time, and the seed coating agent can be directly or directly after appropriate dilution during the coating process. Coated on the surface of the seeds, there is little medicament loss, and the utilization rate of the medicament is over 90%, which is much higher than the medicament utilization rate of th...

Claims

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Application Information

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IPC IPC(8): A01N43/653A01N25/28A01C1/06A01P7/00
Inventor 杨代斌袁会珠闫晓静齐淑华董丰收
Owner INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI
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