Enzyme-responsive controlled-release insecticide as well as suspending agent and preparation method thereof

An insecticide, enzyme-responsive technology, applied in the fields of insecticides, botanical equipment and methods, biocides, etc., can solve the problems of prolonging the action time of insecticides, improve the anti-ultraviolet light degradation performance, overcome the efficacy of drugs Unstable, large surface area effects

Active Publication Date: 2020-08-18
SICHUAN AGRI 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 an enzyme-responsive controlled-release insecticide and its suspension and preparation method, which solves the problem of the utilization rate of existing pesticides, can utilize xylanase to hydrolyze the controlled release of insecticides, and realize the The controlled release of insecticides on the surface of crop leaves prolongs the action time of insecticides and improves the utilization rate of insecticides

Method used

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  • Enzyme-responsive controlled-release insecticide as well as suspending agent and preparation method thereof
  • Enzyme-responsive controlled-release insecticide as well as suspending agent and preparation method thereof
  • Enzyme-responsive controlled-release insecticide as well as suspending agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Extraction of solvent-based lignin (DES lignin):

[0031] Poplar is subjected to steam flash explosion treatment: 1 kg of poplar is placed in a plastic bag and impregnated with a mass fraction of 0.7wt% (based on dry wood weight) dilute sulfuric acid solution, the solid-to-liquid ratio is 1:1, and placed overnight at room temperature . The impregnated poplar samples were then transferred into a 2-L cooking tank, and after steam flash explosion, the resulting slurry was collected and filtered, and the solid part was washed with 1 L of water and stored at 4 °C for future use.

[0032] DES pretreatment: put poplar treated with steam flash explosion and DES into the Erlenmeyer flask at a mass ratio of 1:20, and continuously stir and heat at 130°C for 3h, cool the reaction mixture to about 80°C, and then add 30mL of acetone / water mixture (volume ratio 50 / 50) to reduce its viscosity, filter, in order to remove residual choline chloride deep eutectic solvent and lignin in...

Embodiment 2

[0040] Abamectin consumption is adjusted to 30g in embodiment 1 step (3), and other operation steps are identical with embodiment 1.

Embodiment 3

[0042] In embodiment 1 step (3), the solvent-type lignin consumption is adjusted to 30g, the water-insoluble xylan consumption is adjusted to 30g, and the avermectin consumption is adjusted to 20g, and other operation steps are the same as in embodiment 1.

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Abstract

The invention discloses an enzyme-responsive controlled-release insecticide as well as a suspending agent and a preparation method thereof, wherein the enzyme-responsive controlled-release insecticidehas a core-shell structure, enzyme-responsive lignin-xylan nano composite microspheres are used as a wall material, and an insecticide embedded in the wall material is used as a core material; the insecticide is a hydrophobic insecticide; xylan selected by the enzyme-responsive type lignin-xylan nano composite microspheres is water-insoluble xylan, and lignin selected by the enzyme-responsive type lignin-xylan nano composite microspheres is solvent type lignin. According to the controlled-release insecticide, xylanase hydrolysis can be used for controlling release of the insecticide, controllable release of the insecticide on the surfaces of crops is achieved, the action time of the insecticide is prolonged, and the utilization rate of the insecticide is increased.

Description

technical field [0001] The invention relates to an insecticide, in particular to an enzyme-responsive controlled-release insecticide, a suspending agent and a preparation method thereof. Background technique [0002] Pesticides are an important agricultural input to increase crop productivity and prevent major biological hazards. However, in actual use, more than 90% of pesticides will flow into the environment, which not only reduces the utilization rate of pesticides, but also causes agricultural non-point source pollution, and excessive pesticide residues also threaten food safety. The active ingredients of pesticides are mostly water-insoluble organic compounds, which need to be processed into a suitable formula together with auxiliary ingredients such as carriers, solvents, emulsifiers, and dispersants to facilitate spraying. In order to improve the dispersibility of traditional pesticide preparations, a large amount of organic solvents are used, which further causes e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/04A01N25/28A01N43/90A01N25/32A01P7/04C08H7/00
CPCA01N25/04A01N25/28A01N25/32A01N43/90C08H6/00
Inventor 田东蒋月菡陈怡奕沈飞
Owner SICHUAN AGRI UNIV
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