Tebuconazole-algae slow-release microcapsule fungicide and preparation method thereof

A tebuconazole, sustained-release technology, applied in the field of tebuconazole-algae sustained-release microcapsule fungicide and its preparation, can solve the adverse effects of the surrounding environment, the difficulty of exerting super-efficient effects, and the increase in dosage and frequency and other problems, to achieve the effect of reducing the dosage, low cost and improving the utilization rate

Inactive Publication Date: 2011-12-21
SHANGHAI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, existing tebuconazole pesticide formulation is 43% suspension concentrate, 25% wettable powder and 80% water dispersible granule (Chinese patent CN101156578A), tebuconazole suspension seed coating (Chinese patent CN101133735A), wettable powder ( Chinese patent CN101133737A), these dosage forms are easily affected by factors such as heat, air, rain, soil, microorga

Method used

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  • Tebuconazole-algae slow-release microcapsule fungicide and preparation method thereof
  • Tebuconazole-algae slow-release microcapsule fungicide and preparation method thereof
  • Tebuconazole-algae slow-release microcapsule fungicide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] a. Take the pretreated Microcystis powder and dry it at 50°C for 7 hours;

[0038] b. Dissolve 1 part of tebuconazole, 0.25 part of naphthalene acetic acid and 0.75 part of indolebutyric acid in a reactor filled with 6.25 parts of ethanol, and add 5 parts of dried algal powder, and place in a constant temperature air bath shaker for 25 Shaking and soaking at ℃ for 24 hours;

[0039] c, adding 0.5 part of carboxymethyl cellulose to the material obtained in step b;

[0040] d, 0.75 parts of sodium lignosulfonate and 1 part of sodium dodecyl sulfonate are dissolved in 25 parts of twice distilled water;

[0041] e. After mixing the substance of step c with the substance of step d, first use a high-shear emulsifier to stir at a speed of 12000rpm for 15 minutes, evaporate ethanol at 40°C, solidify into capsules, filter to remove water, and mix with 1 part of zinc sulfate Mix evenly to obtain the tebuconazole-algae sustained-release microcapsule fungicide.

[0042] The prep...

Embodiment 2

[0044] a. Take the pretreated Microcystis powder and dry it at 70°C for 4 hours;

[0045] b. Dissolve 1 part of tebuconazole, 0.4 part of naphthalene acetic acid and 0.1 part of indolebutyric acid in a reactor containing 6 parts of methanol, and add 5 parts of dried algae powder, and place in a constant temperature air bath shaker Shaking and soaking at 25°C for 24 hours;

[0046] c, adding 0.6 part of hydroxyethyl cellulose to the material obtained in step b;

[0047] d, 0.6 parts of polyvinyl alcohol and 1 part of sorbitan monolaurate are dissolved in 30 parts of twice distilled water;

[0048] e. After mixing the substance of step c with the substance of step d, first stir it with a high-shear emulsifier at a speed of 10000rpm for 15 minutes, steam methanol at 50°C, solidify into a capsule, filter to remove water, and mix with 1.4 parts of rare earth nitrate Mix evenly to obtain the tebuconazole-algae sustained-release microcapsule fungicide.

Embodiment 3

[0050] a. Take the pretreated Microcystis powder and dry it at 50°C for 6 hours;

[0051] b. Dissolve 1 part of tebuconazole, 0.6 part of naphthalene acetic acid, and 0.16 part of indole butyric acid in a reactor containing 14 parts of propanol, and add 6 parts of dried algae powder, and place in a constant temperature air bath shaker for 25 Shaking and soaking at ℃ for 24 hours;

[0052] c, 0.6 part of polyvinyl alcohol is added in the material gained in step b;

[0053] d, 0.8 parts of hydroxymethylcellulose and 1.6 parts of polypropylene glycol ethylene oxide ether are dissolved in 40 parts of double distilled water;

[0054] e. After mixing the substance of step c with the substance of step d, first stir it with a high-shear emulsifier at a speed of 10000rpm for 15 minutes, evaporate the propanol at 55°C, solidify into a capsule, filter to remove water, and mix with 1.2 parts of sulfuric acid Mix the ferrous iron evenly to obtain the tebuconazole-algae sustained-release ...

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Abstract

The invention discloses a tebuconazole-algae slow-release microcapsule fungicide and a preparation method thereof. The algae is used as a carrier, and the original drug tebuconazole and a plant growth regulator are adsorbed by its physical adsorption, and a degradable polymer is added. Surfactants and stabilizers are mixed with micro-fertilizers after being solidified into capsules to obtain the tebuconazole-algae sustained-release microcapsule bactericide of the present invention, the weight ratio of each component of the bactericide is: 1 part of tebuconazole; 5-50 parts of algal powder; 0.6-1 part of surfactant; 0.5-1 part of degradable polymer compound; 1-3 parts of stabilizer; 1-2 parts of micro-fertilizer; 0.5-1 part of plant growth regulator. The fungicide of the present invention can effectively control the release, prolong the effective period and reduce the dosage, so as to be less toxic; it adopts the combination of pesticide and micro-fertilizer, and exerts the dual effects of fertilizing the field and plant protection; moreover, the raw materials of the present invention are easy to obtain and low in cost , the process is simple, the environment is friendly, and is suitable for industrial scale production.

Description

technical field [0001] The invention belongs to the field of pesticide preparations, in particular to a tebuconazole-algae slow-release microcapsule fungicide and a preparation method thereof. Background technique [0002] Tebuconazole, English name Tebuconazole, structural formula is as follows: [0003] [0004] Its molecular formula is C 16 h 22 ClN 3 O, the molecular weight is 307.8. The pure product of tebuconazole is a colorless crystal with a melting point of 102.4°C to 104.7°C, a vapor pressure of 0.013mPa at 20°C, and a solubility of 20°C: water 3.2×10 -5 kg / L, dichloromethane>0.2kg / L, hexane<0.0001kg / L, isopropanol, toluene 0.05~0.1kg / L. Stability: Hydrolyzed DT at pH 4, 7 or 9 at 22°C 50 > 1 year. [0005] Tebuconazole is a triazole high-efficiency broad-spectrum systemic fungicide. It is an alcohol demethylation inhibitor, which can penetrate into plants and conduct in vivo. It has a wide antibacterial spectrum and low dosage. Tebuconazole inh...

Claims

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Application Information

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IPC IPC(8): C05G3/00A01N43/653A01N43/38A01N37/10A01N25/28A01P3/00A01P21/00
Inventor 任天瑞艾丽娟王全喜韩睿张晓敏温夏夏
Owner SHANGHAI NORMAL UNIVERSITY
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