Pesticide residue degradation agent taking chitosan oligosaccharide as active component and application thereof

A technology for the degradation of pesticide residues and active ingredients, applied in the fields of application, agriculture, and biocides, to achieve the effects of promoting plant growth, enhancing plant resistance, and being easy to popularize and apply

Active Publication Date: 2013-03-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no reports on pesticide residue degradatio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1: Chito-oligosaccharides directly degrade pesticide residue test

[0021] Chitosan oligosaccharides are formulated into aqueous solutions with mass concentrations of 0.1%, 0.01%, and 0.005%.

[0022] The mass concentration of 20% fenpropathrin EC is diluted with water to a volume concentration of 1:200 as stated on the label. Take 0.1 mL of the chitosan oligosaccharide solution of each concentration and add them to a plastic centrifuge tube with a stopper, and then add 1.0 mL of fenpropathrin diluent. Take 0.1 mL of water and add 1.0 mL of fenpropathrin diluent, mix well and react overnight .

[0023] Take 0.5ml reaction solution in each centrifuge tube and add 5.0ml acetone to shake well, centrifuge at 2500r / min for 30min, aspirate the supernatant with a dropper, add 3.0ml dichloromethane, 10ml sodium sulfate solution (5g / L) , Shake for 1 min, stand for layering, transfer the dichloromethane extract to an evaporating dish, and then extract the acetone aqueous solut...

Example Embodiment

[0027] Example 2: Test for degradation of pesticide residues in tobacco by chitosan oligosaccharides

[0028] Test crop: potted tobacco.

[0029] Application treatment: 5 groups of experimental design, 20 tobacco plants in each group. 20% fenpropathrin EC was diluted with water to a volume concentration of 1:200 as stated on the label, and the tobacco leaf was sprayed. The dosage of each group was 200mL. After 3 days of treatment, 3 groups were randomly selected for chitosan spray treatment. The mass concentrations of oligosaccharides were 0.1%, 0.05%, and 0.01%, respectively. The application only and the water treatment after the application were used as two groups of controls, respectively. The amount of chitosan oligosaccharide and water treatment was also 200 mL per group.

[0030] Sample processing: After 3 days of chitosan treatment, collect tobacco leaves from each treatment group, take 250 grams of samples from each treatment group, and after sufficient crushing, extract twi...

Example Embodiment

[0034] Example 3: Chitooligosaccharide degradation of soil pesticide residue experiment

[0035] The experiment was carried out in the test site of the greenhouse. The agent was carbofuran insecticide (granules with a mass concentration of 3%), which belonged to carbamate pesticides. Experimental design 5 treatment groups, each treatment area is 2m 2 , Each group of 10g medicine, evenly sprinkle on the surface of the test ground, turn the ground. The treatment groups were treated with chitosan oligosaccharides after 3 days of pesticide application, and the treatment mass concentrations were 0.005%, 0.01%, 0.05% and 0.1%. The control group was treated with clean water, and the ground was sprayed evenly, with a dosage of 1L per square meter, the next day Turn the ground. After 3 days of chitosan oligosaccharide treatment, samples were taken for testing.

[0036] Remove large pieces such as stones from the soil, pass through a 40-mesh sieve, and mix thoroughly. Weigh 20 grams of sa...

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PUM

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Abstract

The invention discloses a pesticide residue degradation agent taking chitosan oligosaccharide as an active component. The mass concentration of chitosan oligosaccharide in the degradation agent is 0.05-1g/L, the degree of deacetylation is 50-100%, and the average molecular weight is 500-5,000Da; and by spraying the degradation agent to the soil or the crops in a growing period and after picking or irrigating or soaking the soil or the crops in a growing period and after picking with the degradation agent, the pesticide residue in soil and crops can be obviously reduced (the degradation rate exceeds 65%). The degradation agent disclosed by the invention can degrade the pesticides of pyrethroids, carbamates, organochlorines, triazoles and the like; and the plants using the degradation agent include grain crops, cash crops, flowers, vegetables, fruits and the like. In the degradation agent disclosed by the invention, the active component chitosan oligosaccharide is a natural product which avoids environmental pollution of the processed soil and crops and is harmless to the health of human body and environment-friendly; and meanwhile, the pesticide residue degradation agent has the advantages of low cost, small application amount and the like, and is simple to use and easy to popularize and use.

Description

technical field [0001] The invention relates to a pesticide residue degradation agent, in particular to a pesticide residue degradation agent with chitosan oligosaccharide as an active ingredient and application thereof. Background technique [0002] The widespread use of pesticides, while preventing and controlling agricultural pests and recovering economic losses, has also inevitably caused varying degrees of pollution to the environment, soil, water bodies and agricultural products. In particular, unreasonable, unscientific, and non-standard use lead to a large amount of pesticide residues in the soil, and pesticide residues in vegetables exceed the standard. In recent years, accidents in my country's food safety field have occurred frequently, a large part of which is caused by pesticide residues caused by the abuse of chemical pesticides. In addition, because the amount of pesticides used in my country has greatly exceeded the world average level, my country's export o...

Claims

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Application Information

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IPC IPC(8): A01N25/32C09K17/40A23L1/015C09K101/00A23L5/20
CPCA01N25/32A01N43/16A01N61/00
Inventor 杜昱光王文霞赵小明刘启顺尹恒
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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