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A controlled-release preparation for eliminating Mikania micrantha and its preparation method

A controlled-release preparation, the technology of Mikania micrantha, applied in the fields of botanical equipment and methods, chemicals for biological control, herbicides and algicides, etc. problems, to achieve the effect of environmental and operator safety, significant elimination effect, and low dosage

Inactive Publication Date: 2011-12-21
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, each control method has certain disadvantages: artificial control costs are high, and the effect is not significant; biological control is difficult to find suitable biological natural enemies (except for a few insects such as the short beard mite); as a "plant killer", Mikania micrantha, except for dodder Except for a small number of plants, it is difficult to find plants that can compete for growth, and it is very difficult to transform plant communities; chemical control is currently recognized as a relatively effective method, but this method also has certain shortcomings
The reason is that there are still many technical difficulties to be overcome in the preparation and application of controlled release preparations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Dissolve 1 g of polyvinyl alcohol in 120 g of distilled water, add 1 g of sodium chloride and 1 g of superfine talc, and stir to obtain an aqueous phase; mix 5 g of methyl acrylate, 5 g of ethyl acrylate, 1 g ethylene glycol diacrylate, 0.2 g azobisisobutyronitrile, 12 g sulfuron-methyl, and 20 g butyl acetate were mixed evenly to obtain an oil phase; the water phase was transferred into a reaction flask, and the oil was introduced while stirring phase, then stirred at a speed of 600 r / min for 20 minutes, and at the same time passed nitrogen gas to remove the air in the reaction flask; raised the temperature to 70°C, polymerized for 3 h under nitrogen protection and constant stirring at 400 r / min, and filtered Microspheres with a drug loading of metsulfuron-methyl were obtained at 30%.

[0043] (2) Dissolve 4 g of xanthan gum and 40 g of polyacrylamide in 1000 g of water to make a dilute solution, and then add 20 g of glutaraldehyde to it to obtain a functional medi...

Embodiment 2

[0047] (1) Dissolve 1 g of carboxymethyl cellulose in 120 g of distilled water, add 1 g of sodium chloride and 1 g of superfine calcium carbonate, and stir to obtain an aqueous phase; mix 2 g of methyl acrylate, 6 g of ethyl acrylate , 2 g vinyl acetate, 0.8 g N, N-dimethylacrylamide, 0.15 g dibenzoyl peroxide, 12 g promethazin and 22 g methyl ethyl ketone were mixed evenly to obtain an oil phase; the water phase was transferred into the reaction In the bottle, introduce the oil phase while stirring, then stir at a speed of 650 r / min for 20 minutes, and at the same time pass nitrogen gas to remove the air in the reaction bottle; heat up to 70 ° C, under nitrogen protection and a constant speed of 350 r / min Polymerize under stirring for 3 h, and filter to obtain the microspheres with 30% promethazine drug loading.

[0048] (2) Dissolve 40 g of poly(acrylamide-acrylic acid), 2 g of xanthan gum, and 1 g of polyvinyl alcohol in 1000 g of water to prepare a dilute solution, and the...

Embodiment 3

[0052] (1) Dissolve 1 g of hydroxyethyl cellulose in 120 g of distilled water, add 0.5 g of sodium chloride and 1 g of superfine kaolin, and stir to obtain an aqueous phase; mix 3 g of methyl methacrylate, 3 g of ethyl acrylate ester, 4 g butyl acrylate, 1.2 g polyethylene glycol diacrylate, 0.18 g benzoyl peroxide, 12 g bensulfuron-methyl, and 18 g methyl ethyl ketone were mixed evenly to obtain an oil phase; the water phase was transferred into a reaction flask In the process, introduce the oil phase while stirring, and then stir at a speed of 680 r / min for 25 minutes, and at the same time pass nitrogen gas to remove the air in the reaction flask; heat up to 75 ° C, under nitrogen protection and constant speed stirring at 380 r / min Polymerize for 3.5 h, and filter to obtain microspheres with 30% drug loading.

[0053] (2) Dissolve 3 g of xanthan gum, 20 g of polyacrylamide, and 20 g of polyacrylic acid in 1000 g of water to prepare a dilute solution, and then add 12 g of gly...

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PUM

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Abstract

The invention discloses a controlled release preparation for removing mikania micrantha and a preparation method thereof. The controlled release preparation consists of a controlled release microsphere and a function medium with suspension capability and attaching and film-forming capability. The controlled release microsphere comprises the following components calculated according to mass percentage: 20-50 percent of weedicide, 20-40 percent of release rate mediator and 30-50 percent of high polymer carrier materials; and the function medium with the suspension capability and attaching and film-forming capability is a water solution consisting of a cross-linking agent and a functional polymer. The preparation method of the controlled release preparation comprises the steps of respectively preparing the controlled release microsphere and the function medium and then dispersing the controlled release microsphere in the function medium to obtain the controlled release preparation. The dosage of the controlled release preparation for treating can be reduced to be 0.01 / m<2>; the controlled release preparation has favorable safety for the environment and operators; and the effect of the controlled release preparation for removing the mikania micrantha is thorough compared with that of a traditional method.

Description

technical field [0001] The invention belongs to the technical field of invasive plant prevention and control, and in particular relates to a controlled-release preparation for eliminating Mikania micrantha and a preparation method thereof. Background technique [0002] Mikania micrantha is a plant of the genus Eupatorium in the Asteraceae family, native to tropical America. It is one of the top ten harmful weeds in the world. It is known as a "plant killer" and is a forestry quarantine pest in my country. Mikania micrantha grows fast and has strong light-following properties. It can quickly invade, spread and strangle adjacent plants, making them unable to perform photosynthesis, and eventually "strangle" these plants to death. If Mikania micrantha is allowed to develop, a large area of ​​forest will be destroyed, which will have long-term adverse effects on land afforestation, and will also seriously deteriorate the ecological environment. [0003] Mikania micrantha has te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/26A01N25/00A01N47/36A01N43/70A01P13/02
Inventor 王正辉王青石花蕾
Owner SOUTH CHINA AGRI UNIV
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