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Slow-release pesticide for preventing and treating corn ear pests, and preparation method of slow-release pesticide

A slow-release pesticide and ear insect damage technology, applied in the field of pesticides, can solve the problems of high pesticide residues in skin poisoning, poor pest control effect, and low rate of commercial corn ears, so as to enhance bioavailability, avoid adverse effects, and solve the problem of release fast effect

Pending Publication Date: 2021-01-22
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the poor pest control effect of pesticides on corn ears in the mature stage in the above-mentioned prior art, which requires repeated spraying to pollute the environment, and makes the pesticide residues in corn ears high to cause the commercial ear rate of corn Low technical problem, provide a kind of slow-release pesticide that is used for preventing and treating corn fruit insect pest, this slow-release pesticide can effectively control the time of pesticide release, prolong the service life of pesticide, reduce leaching, evaporation, degradation, reduce the time-consuming period of pesticide application. The risk of skin poisoning and the problem of high pesticide residues at ear harvest

Method used

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  • Slow-release pesticide for preventing and treating corn ear pests, and preparation method of slow-release pesticide
  • Slow-release pesticide for preventing and treating corn ear pests, and preparation method of slow-release pesticide
  • Slow-release pesticide for preventing and treating corn ear pests, and preparation method of slow-release pesticide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A slow-release pesticide for preventing and controlling insect pests on corn ears, which is obtained by the following preparation method:

[0030] (1) dissolve 0.24g chitosan with 800ml 1% (v / v) glacial acetic acid aqueous solution, stir 35min at room temperature, make the chitosan solution of 0.3g / L;

[0031] (2) Mix 0.3ml of Tween and Span at a volume ratio of 2:1, add to the chitosan solution, stir and mix evenly, and stir at 40°C for 30min to obtain the first mixed solution;

[0032] (3) Dissolve 0.55 g of chlorantraniliprole in 5 ml of dimethyl sulfoxide, then quickly add it dropwise to the first mixed solution, and stir at 40°C for 30 minutes to obtain the second mixed solution;

[0033] (4) Add 240ml of 0.5w / v% sodium tripolyphosphate solution dropwise to the second mixed solution, and stir at room temperature for 1 hour to obtain the third mixed solution;

[0034] (5) 800ml 0.4w / v% carboxymethyl chitosan solution is added dropwise in the third mixed solution an...

Embodiment 2

[0037] A slow-release pesticide for preventing and controlling insect pests on corn ears, which is obtained by the following preparation method:

[0038] (1) dissolve 0.24g chitosan with 800ml 1v / v% glacial acetic acid aqueous solution, stir 35min at room temperature, obtain the chitosan solution of 0.3g / L;

[0039] (2) Take 0.3ml of Tween and Span in a volume ratio of 2:1, mix them together, add them to the chitosan solution, stir and mix evenly, and stir at 50°C for 30 minutes to obtain the first mixed solution;

[0040] (3) Dissolve 0.55 g of chlorantraniliprole in 5 ml of dimethyl sulfoxide, quickly add it dropwise to the first mixed solution, and stir at 50°C for 30 minutes to obtain the second mixed solution;

[0041] (4) Add 240ml of 0.5w / v% sodium tripolyphosphate solution dropwise to the second mixed solution and mix, stir at room temperature for 1 hour to obtain the third mixed solution;

[0042] (5) 800ml 0.4w / v% carboxymethyl chitosan solution is added dropwise in...

Embodiment 3

[0045] A slow-release pesticide for preventing and controlling insect pests on corn ears, which is obtained by the following preparation method:

[0046] (1) dissolve 0.24g chitosan with 800ml 1v / v% glacial acetic acid aqueous solution, stir 35min at room temperature, obtain the chitosan solution of 0.3g / L;

[0047] (2) Add 0.3ml of Tween and Span into the chitosan solution at a volume ratio of 2:1, stir and mix evenly, and stir at 40°C for 45min to obtain the first mixed solution;

[0048](3) Dissolve 0.55 g of chlorantraniliprole in 5 ml of dimethyl sulfoxide, then quickly add it dropwise to the first mixed solution, and stir at 40°C for 45 minutes to obtain the second mixed solution;

[0049] (4) Add 240ml of 0.5w / v% sodium tripolyphosphate solution dropwise to the second mixed solution, and stir at room temperature for 1.5h to obtain the third mixed solution;

[0050] (5) 800ml of 0.4w / v% carboxymethyl chitosan solution is added dropwise to the third mixed solution and mi...

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Abstract

The invention discloses a slow-release pesticide for preventing and treating corn ear pests, wherein the slow-release pesticide is prepared by the following method: dissolving chitosan by using glacial acetic acid and / or sodium acetate aqueous solution, and uniformly stirring to obtain a chitosan solution; adding an emulsifier into the chitosan solution, and uniformly stirring to obtain a first mixed solution; dissolving a pesticide active agent into an organic solvent to obtain a pesticide dissolving solution, then dropwise and rapidly dripping the pesticide dissolving solution into the firstmixed solution under a stirring condition, and uniformly stirring to obtain a second mixed solution; dropwise adding a cross-linking agent into the second mixed solution, and uniformly stirring to obtain a third mixed solution; dropwise adding a carboxymethyl chitosan aqueous solution into the third mixed solution, and uniformly stirring to obtain a pesticide active agent entrapped micron dispersion body; and centrifugally removing the micron dispersion body to obtain the slow-release pesticide. The slow-release pesticide provided by the invention can effectively control the release time of the pesticide and reduce the risk of percutaneous poisoning during pesticide application.

Description

technical field [0001] The invention relates to the technical field of pesticides, in particular to a slow-release pesticide for preventing and controlling corn ear pests and a preparation method thereof. Background technique [0002] The control of corn pests and diseases, especially in the mature stage, is very important. Since the harvest is approaching, generally no pesticides are used to control corn earworms to avoid a large amount of pesticide residues in the corn grain, causing undue poison to the human body. This often results in a large population of corn earworms on the corn plants at harvest. Prevention and control at the peak silking stage of the ear will affect the pollination of corn; if the control is too late, the pests will have penetrated into the ear, resulting in difficulty in control and poor control effect. Lepidoptera pests in particular mainly include Spodoptera frugiperda, Corn borer, Cotton bollworm, Beet armyworm, Peach borer, Armyworm, Spodopter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/10A01N43/56A01P7/04
CPCA01N25/10A01N43/56
Inventor 张志祥吴吉英子徐汉虹黄素青程东美
Owner SOUTH CHINA AGRI UNIV
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