Preparation of ethofenprox film-spreading oil solution and application of ethofenprox film-spreading oil solution on control of rice plant hopper

A film-expanding oil agent, etofenprox technology, applied in the application, insecticide, biocide, etc., can solve the problems that it is difficult to evenly distribute the active ingredients in water, pollute the environment, waste aquatic organisms, etc.

Inactive Publication Date: 2012-09-12
上海沪联生物药业(夏邑)股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the resulting problem is: when using a solid substance as a carrier, along with the dissolution of the water-soluble carrier, if the active ingredient is also water-soluble, it will diffuse due to the concentration difference, resulting in all the active ingredients being dissolved in the water body. To ensure the control effect, the water body must reach a certain effective concentration, which will not only waste but also cause great harm to aquatic organisms, humans, and livestock; if the active ingredient is insoluble in water, it is difficult to ensure that it is carried on a solid carrier The active ingredients can be evenly distributed in water; and the granules are easily powdered due to friction and extrusion during transportation and storage, which affects the efficacy of the drug.
If a general organic solvent is used as the solvent system, it will also pollute the environment due to the toxicity of the solvent; at the same time, with the volatilization of the solvent, the active components in the preparation will crystallize and aggregate into solid particles due to their insoluble water solubility, making it difficult to maintain their Effective Concentration Uniformity in Water

Method used

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  • Preparation of ethofenprox film-spreading oil solution and application of ethofenprox film-spreading oil solution on control of rice plant hopper
  • Preparation of ethofenprox film-spreading oil solution and application of ethofenprox film-spreading oil solution on control of rice plant hopper

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1% Etofenprox Film Spreading Oil

[0023] Take 1% Etofenprox by mass percentage, solvent methyl laurate 6%, surfactant alkylphenol polyoxyethylene tetraether (OP-4) 2%, alkylphenol polyoxyethylene decaether (OP-10) 2%, Nongru 2201 1%, lauryl alcohol ester 5%, soybean oil to make up to 100%. Under stirring at a temperature of 50-60°C and a rotation speed of 50-100 rpm, the etofenprox was completely dissolved in the solvent to obtain a 1% etofenprox spreading oil.

[0024] The prepared etofenfax film spreading oil has a transparent appearance, no precipitation, crystallization and stratification after 14 days of heat storage (54°C±2°C) and 7 days of low temperature storage (0°C±2°C), and the decomposition rate is 1.2% . The surface tension at 35°C is 21.7mN / m, and the oil / water interfacial tension when dripping on the water surface is 0.11mN / m; it can spread rapidly on the water surface. When the dripping amount is 3.6μL, the spreading speed is 10.4cm / s. The spreading ...

Embodiment 2

[0026] 2.5% Etofenprox film developing oil

[0027] Take 2.5% Etofenprox by mass percentage, solvent methyl laurate 15%, surfactant alkylphenol polyoxyethylene tetraether (OP-4) 2%, alkylphenol polyoxyethylene decaether (OP-10) 2%, Nongru 2201 2%, lauryl alcohol ester 5%, soybean oil to make up to 100%. Under stirring at a temperature of 50-60°C and a rotation speed of 50-100 rpm, the etofenprox was completely dissolved in the solvent to obtain a 2.5% etofenprox spreading oil.

[0028] The prepared Etofenprox film spreading oil has a transparent appearance, and after heat storage (54°C±2°C) for 14 days and low temperature storage (0°C±2°C) for 7 days, there is no precipitation, crystallization and delamination, and the decomposition rate is 1.8% . The surface tension at 35°C is 24.1mN / m, and the oil / water interfacial tension when dripping on the water surface is 0.17mN / m; it can spread rapidly on the water surface, and the spreading speed is 8.2cm / s when the dripping amount ...

Embodiment 3

[0030] 5% Etofenprox Film Spreading Oil

[0031] Take 5% Etofenprox by mass percentage, solvent methyl laurate 20%, surfactant alkylphenol polyoxyethylene tetraether (OP-4) 4%, alkylphenol polyoxyethylene decaether (OP-10) 4%, Nongru 2201 4%, lauryl alcohol ester 5%, soybean oil to make up to 100%. Under stirring at a temperature of 50-60°C and a rotation speed of 50-100 rpm, the etofenprox was completely dissolved in the solvent to obtain a 5% etofenprox spreading oil.

[0032] The prepared Etofenprox film spreading oil has a transparent appearance, no precipitation, crystallization and stratification after 14 days of heat storage (54°C±2°C) and 7 days of low temperature storage (0°C±2°C), and the decomposition rate is 1.5% . The surface tension at 35°C is 26.7mN / m, and the oil / water interfacial tension when dripping on the water surface is 0.25mN / m; it can spread rapidly on the water surface, and the spreading speed is 7.8cm / s when the dripping amount is 3.6μL. The spread...

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Abstract

Provided are preparation of ethofenprox film-spreading oil solution and application of the ethofenprox film-spreading oil solution on control of rice plant hopper. A preparation method of the ethofenprox film-spreading oil solution and the control effects of the ethofenprox film-spreading oil solution on the rice plant hopper are disclosed. The optimal formula is that the film-spreading oil solution comprises the following components, by mass: 1-20% of ethofenprox, 5-25% of solvents, 1-20% of surfactants, 1-10% of film-forming additives, and the balance soybean oil. The preparation method comprises evenly mixing the solvents and the diffusion additives which form the ethofenprox film-spreading oil solution, then adding ethofenprox raw pesticide, carrying out stirring and dissolving, and adding the surfactants, and evenly stirring to obtain the ethofenprox film-spreading oil solution. The ethofenprox film-spreading oil solution is used on the water surface, namely active ingredients can spread and diffuse on the water surface rapidly after the ethofenprox film-spreading oil solution is scattered or dripped to the water surface, and pests moving on the water surface or pests inhabiting or harming the portions of plants close to the water surface can be killed. The ethofenprox film-spreading oil solution has the advantages of rapidly spreading to form a film and being capable of effectively forming the film or spreading at the portions of the plants close to the water surface by adsorption or capillarity.

Description

technical field [0001] The invention relates to the preparation of etofenprox film spreading oil agent and its application in controlling rice planthopper. Background technique [0002] Ethofenprox is an ether pyrethroid insecticide that does not contain an ester structure in the molecule. It is a nerve agent with contact and stomach toxicity, no systemic conduction, and toxicity to mammals and fish. extremely low. It can effectively control white-backed planthopper Sogatella furcifera (Horvath), brown planthopper Nilaparvata lugens (Stal), gray planthopper Laodelphax striatellus (Fallen), black-tailed leafhopper Nephotettix cincticeps (Uhler), rice weevil Echinocnemussquameus Billberg and other pests. With the emergence of rice plan chopper resistance to imidacloprid, etofenprox will become one of the ideal pesticide varieties to replace highly toxic organophosphorus insecticides such as methamidophos, and has broad market application prospects. [0003] Structural formul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N31/14A01N25/02A01P7/04
Inventor 司贤良
Owner 上海沪联生物药业(夏邑)股份有限公司
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