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Intelligent silicon dioxide nano pesticide for preventing and treating pine tree wilt

A nano-pesticide and application technology, applied in the field of intelligent silica nano-pesticide, can solve the problems of inability to kill pests in tree trunks, pests are prone to drug resistance, and poor controllability, so as to save complicated procedures and achieve pesticide reduction. , the effect of low cost

Active Publication Date: 2022-02-11
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned prior art, the object of the present invention is to provide a novel nano-pesticide for preventing and treating pine wood nematodes, which effectively solves the problem of low efficacy of traditional pesticide preparations, poor controllability, inability to kill pests in the trunk, and pests that are prone to resistance. medicine and other issues

Method used

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  • Intelligent silicon dioxide nano pesticide for preventing and treating pine tree wilt
  • Intelligent silicon dioxide nano pesticide for preventing and treating pine tree wilt
  • Intelligent silicon dioxide nano pesticide for preventing and treating pine tree wilt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] (1) Add 60.7 μL of triethanolamine to 25 mL of purified water, and stir in an oil bath at 80°C for 30 minutes;

[0055] (2) Dissolve 380 mg of cetyltrimethylammonium bromide and 168 mg of sodium salicylate in the water-triethanolamine solution prepared in step (1), and continue stirring at 80° C. for 1 h;

[0056] (3) Add 4 mL (original) tetraethyl silicate to the solution prepared in step (2), and continue stirring at 80° C. for 2 h; after the reaction, centrifuge to obtain a precipitate, and wash with ethanol several times to remove unreacted substances;

[0057] (4) Add 1.54mL 36wt% concentrated hydrochloric acid and 120mL methanol to the precipitate obtained in step (3) and react three times at 60°C, each time for 6h, and centrifuge to remove cetyltrimethylammonium bromide to obtain DMSNs, The yield of the obtained DMSNs was 95.0%.

[0058] Yield of DMSNs=(actual yield of DMSNs / theoretical calculated yield of DMSNs)×100%.

[0059] (5) Take aloperine and dissolve i...

Embodiment 2

[0065] (1) Take 1g HAuCl 4 Dissolve in ultrapure water, set volume to 100mL, get 1wt% HAuCl 4 Solution, take 2.5mL and dilute 10 times to obtain 0.01wt% HAuCl 4 Solution, 250mL 0.01wt% HAuCl 4 The solution was placed in a 500mL three-necked flask, condensed and refluxed in an oil bath, heated to boiling, poured into 7.5mL of 1wt% trisodium citrate solution, and continued to stir for 20min to obtain the AuNPs solution.

[0066] (2) Take it out and put it in ice water to cool to room temperature and collect. Take 2 mg of DTTC, disperse it in 1 L of ultrapure water, stir for 30 min, and obtain a 3.67 mmol / L DTTC solution for later use. Put the AuNPs on a magnetic stirrer, take 2mg of DTTC and add 20mL of ultrapure water, and add the DTTC solution to the AuNPs solution drop by drop until the solution just changes color. Take 400mL of the discolored solution, add 50mL of MPEG-COOH and 50mL of MPEG dropwise, stir for 2 hours and then centrifuge, absorb the supernatant with a pip...

Embodiment 3

[0075] (1) Add 60.7 μL of triethanolamine to 25 mL of purified water, and stir in a water bath at 80° C. for 30 min;

[0076] (2) 380mg cetyltrimethylammonium bromide and 168mg sodium salicylate are dissolved in the water-cetyltrimethylammonium bromide-sodium salicylate-triethanolamine prepared in step (1) In the solution, continue stirring in a water bath at 80°C for 1h;

[0077] (3) Add 4 mL (original) tetraethyl silicate to the solution prepared in step (2), and continue stirring in a water bath at 80° C. for 2 h; after the reaction, centrifuge to obtain a precipitate, and wash with ethanol to remove unreacted substances;

[0078] (4) Add 240 μL of concentrated hydrochloric acid and 120 mL of methanol to the precipitate obtained in step (3) and react at 60° C. for 6 h three times to remove the template to obtain DMSNs. The yield of the obtained DMSNs is 94.0%.

[0079] (5) Take aloperine and dissolve it in ethanol to obtain an aloperine solution with a concentration of 1 m...

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Abstract

The invention discloses an intelligent silicon dioxide nano-pesticide for preventing and treating pine tree wilt, which is characterized in that gold nanoparticles (AuNPs) are firstly loaded into dendritic mesoporous silicon dioxide, then the pesticide aloperine is loaded, or the aloperine is directly loaded into DMSNs, and an aloperine-loaded nano-pesticide preparation is obtained. The aloperine-loaded nano-pesticide preparation prepared by a one-pot method not only has a larger specific surface area, high drug loading capacity and a good controlled release effect, but also has Au loaded with DDTC, so that rapid and nondestructive detection of pesticides can be realized by applying a Raman spectrum technology; and the DMSNs-Au-ALO NPs preparation method has the advantages of low equipment requirement, low energy consumption and high yield, is suitable for industrial production, can effectively penetrate through the cell wall barrier of plants, realizes double killing, does not pollute the environment, and effectively prevents and treats pine wood nematodes.

Description

technical field [0001] The invention relates to the technical field of nano-pesticides, in particular to an intelligent silica nano-pesticide for preventing and treating pine blight. Background technique [0002] Currently, pine wood nematode (Bursaphelenchus xylophilus) is a major global forestry quarantine pest, which seriously threatens the world's forest resources and human ecological environment. At present, the prevention and control of pine wood nematode must be based on prevention. Before there is an outbreak, timely detection and effective measures are taken to prevent and control its vector insects. This is the basis for effectively reducing its harm. At present, our country focuses on comprehensive quarantine of pine wood nematodes, and adopts methods such as natural enemy control, pest control, attractant trapping, and chemical control. Due to the high efficiency of chemical control, contact, systemic and stomach poisons have strong permeability Some chemical pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/08A01N43/90A01N25/12A01P5/00A01P7/04
CPCA01N25/08A01N43/90A01N25/12
Inventor 刘彦雪许小雨殷晓丽彭莉季英超周成刚刘会香尹淑艳贾春艳赵永军
Owner SHANDONG AGRICULTURAL UNIVERSITY
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