CN112075420A - Slow-release agent for preventing and treating garden plant diseases and insect pests and preparation method thereof - Google Patents
Slow-release agent for preventing and treating garden plant diseases and insect pests and preparation method thereof Download PDFInfo
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- CN112075420A CN112075420A CN202010902411.5A CN202010902411A CN112075420A CN 112075420 A CN112075420 A CN 112075420A CN 202010902411 A CN202010902411 A CN 202010902411A CN 112075420 A CN112075420 A CN 112075420A
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- bentonite
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
- A01N25/10—Macromolecular compounds
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/02—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms
- A01N43/04—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom
- A01N43/14—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings
- A01N43/16—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one or more oxygen or sulfur atoms as the only ring hetero atoms with one hetero atom six-membered rings with oxygen as the ring hetero atom
Abstract
The invention discloses a preparation method of a slow release agent for preventing and treating garden plant diseases and insect pests, which comprises the following steps: stirring the bentonite for 10-20min at the stirring temperature of 80-90 ℃ and at the stirring speed of 1000-; heating the paper mulberry powder to 600-650 ℃, and pyrolyzing for 10-20s to obtain biological oil; adding water into the bio-oil, uniformly stirring, standing for layering, distilling the water phase at normal pressure, collecting distillate at 104-108 ℃, adding the chitosan-bentonite compound, and stirring at low temperature to obtain composite bentonite; uniformly mixing the composite bentonite, polylactic acid, urea, erucamide and a heat stabilizer, adjusting the pH value of the system to 6.2-6.6, and granulating to obtain the slow release agent for preventing and treating the diseases and insect pests of the garden plants.
Description
Technical Field
The invention relates to the technical field of garden pest control, and particularly relates to a slow release agent for garden plant pest control and a preparation method thereof.
Background
In recent years, people have increasingly recognized the functions of greening in urban construction, the urban greening area is remarkably increased, and greening maintenance becomes the core work of landscaping industry. With the development of high-efficiency agriculture of facilities, a plurality of trees in ecological gardens are damaged by insect pests and germs, so that roots of the trees are rotten, and leaves are withered. The prevention and control method of pesticide is usually adopted to inhibit the development of diseases, so that the pesticide residue of trees is serious, and the surrounding environment is seriously influenced.
In urban greening work, plant disease and pest control is one of important measures for greening and maintenance, and a disease and pest control medicament is a determining factor for improving the quality of greening plants and ensuring the healthy growth of the greening plants. The existing pesticide for landscaping seedlings has the disadvantages of short pesticide effect time, low utilization rate, multiple application, high labor intensity, time and labor waste and high cost. Therefore, the development of the slow release agent for preventing and treating the special plant diseases and insect pests in the gardens, which is not only environment-friendly, but also long in pesticide effect time and high in utilization rate, has important economic benefits, social benefits and ecological benefits.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a slow release agent for preventing and treating garden plant diseases and insect pests and a preparation method thereof.
A preparation method of a slow release agent for preventing and treating garden plant diseases and insect pests comprises the following steps:
s1, stirring the bentonite for 10-20min at the stirring temperature of 80-90 ℃ and the stirring speed of 1000-;
s2, heating the paper mulberry powder to 600-650 ℃, and pyrolyzing for 10-20S to obtain bio-oil; adding water into the bio-oil, uniformly stirring, standing for layering, distilling the water phase at normal pressure, collecting distillate at 104-108 ℃, adding the chitosan-bentonite compound, and stirring at low temperature to obtain composite bentonite;
s3, uniformly mixing the composite bentonite, the polylactic acid, the urea, the erucamide and the heat stabilizer, adjusting the pH value of the system to 6.2-6.6, and granulating to obtain the slow release agent for preventing and treating the diseases and insect pests of the garden plants.
Preferably, in S1, the bentonite is one of sodium bentonite, lithium bentonite and calcium bentonite, and is preferably calcium bentonite.
Preferably, in S1, the mass ratio of calcium bentonite to chitosan is 100: 1-5.
Preferably, in S2, the powder of paper mulberry is 60-80 mesh.
Preferably, in S2, the mass ratio of the paper mulberry powder, water and the chitosan-bentonite composite is 15-25: 5-12: 100-110.
Preferably, in S3, the polylactic acid has a molecular weight of 30 to 50 ten thousand and a melt flow rate of 20 to 40g/10min (210 ℃, 2.16 kg).
Preferably, in S3, the heat stabilizer comprises: calcium zinc stabilizers, epoxidized soybean oil, and trioctyl phosphite.
Preferably, the mass ratio of the calcium zinc stabilizer to the epoxidized soybean oil to the trioctyl phosphite is 20-30: 10-15: 2-6.
Preferably, in S3, the mass ratio of the composite bentonite, the polylactic acid, the urea, the erucamide and the heat stabilizer is 120-130: 20-30: 10-18: 1-2: 1-2.
A slow release agent for preventing and treating garden plant diseases and insect pests is prepared by adopting the preparation method of the slow release agent for preventing and treating garden plant diseases and insect pests.
The technical effects of the invention are as follows:
in the S1 of the invention, after the bentonite is dispersed at high speed and high temperature, the bentonite is intercalated by chitosan, because interlayer cations of calcium bentonite are Ca2+The distance between the layers of the frame is larger, chitosan can easily enter the sheet layer of bentonite, and the bentonite and the chitosan both belong to degradable materials, so that the pollution is extremely small, and the environment is protected; in S2, the broussonetia papyrifera powder is pyrolyzed and is rich in functional groups such as carboxyl, aldehyde, hydroxyl, acyl and the like, and the functional groups are contained in the chitosan-bentonite compoundThe chitosan derivative has strong antibacterial and bacteriostatic effects, and the generated chitosan derivative has synergistic effect, so that the bacteriostatic effect is greatly improved, the drug effect utilization rate can be effectively improved, the bacteriostatic effect is enhanced, and the bacteriostatic time effect is prolonged;
although the chitosan derivative has the highest antibacterial strength in an environment with the pH value of 6.2-6.6, the solubility of the chitosan derivative is limited, so that the chitosan derivative is matched with a distillate for secondary intercalation and can control the release speed of active ingredients of the composite bentonite in soil.
The invention is applied to the pest control of garden plants, and only needs to be buried at the root systems of the garden plants in the application process, so that the pest control effect is good, and degradation products can be further supplied to the garden plants as fertilizers for absorption, thereby being green, environment-friendly and pollution-free.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A preparation method of a slow release agent for preventing and treating garden plant diseases and insect pests comprises the following steps:
s1, stirring 100kg of sodium bentonite for 10min at the stirring temperature of 90 ℃ and the stirring speed of 1000r/min, then reducing the stirring speed to 300r/min, adding 1kg of chitosan, continuing stirring for 2h, and standing for 5h to obtain a chitosan-bentonite compound;
s2, heating 25kg of 60-mesh broussonetia papyrifera powder to 650 ℃, and pyrolyzing for 10S to obtain bio-oil; adding 12kg of water into the bio-oil, uniformly stirring, standing for layering, distilling the water phase at normal pressure, collecting distillate at 104 ℃, adding 110kg of chitosan-bentonite compound, and stirring at low temperature for 5min at the stirring speed of 1500r/min to obtain composite bentonite;
s3, uniformly mixing 120kg of composite bentonite, 30kg of polylactic acid with molecular weight of 30 ten thousand and melt flow rate of 40g/10min (210 ℃, 2.16kg), 10kg of urea, 2kg of erucamide and 1kg of heat stabilizer, adjusting the pH value of the system to 6.2-6.6, and granulating to obtain the slow release agent for preventing and treating the diseases and insect pests of the garden plants.
Wherein the heat stabilizer is prepared from a calcium zinc stabilizer, epoxidized soybean oil and trioctyl phosphite according to a mass ratio of 30: 10: 6.
Example 2
A preparation method of a slow release agent for preventing and treating garden plant diseases and insect pests comprises the following steps:
s1, stirring 100kg of lithium bentonite for 20min at the stirring temperature of 80 ℃ and the stirring speed of 1200r/min, then reducing the stirring speed to 200r/min, adding 5kg of chitosan, continuing stirring for 1h, and standing for 10h to obtain a chitosan-bentonite compound;
s2, heating 15kg of 80-mesh broussonetia papyrifera powder to 600 ℃, and pyrolyzing for 20S to obtain bio-oil; adding 5kg of water into the bio-oil, uniformly stirring, standing for layering, distilling the water phase at normal pressure, collecting distillate at 108 ℃, adding 100kg of chitosan-bentonite compound, and stirring at low temperature for 12min at the stirring speed of 1000r/min to obtain composite bentonite;
s3, uniformly mixing 130kg of composite bentonite, 20kg of polylactic acid with molecular weight of 50 ten thousand and melt flow rate of 20g/10min (210 ℃, 2.16kg), 18kg of urea, 1kg of erucamide and 2kg of heat stabilizer, adjusting the pH value of the system to 6.2-6.6, and granulating to obtain the slow release agent for preventing and treating the diseases and insect pests of the garden plants.
Wherein the heat stabilizer is prepared from a calcium zinc stabilizer, epoxidized soybean oil and trioctyl phosphite according to a mass ratio of 20: 15: 2.
Example 3
A preparation method of a slow release agent for preventing and treating garden plant diseases and insect pests comprises the following steps:
s1, stirring 100kg of calcium bentonite for 12min at 88 ℃ and 1050r/min, then reducing the stirring speed to 280r/min, adding 2kg of chitosan, continuing stirring for 1.7h, and standing for 6h to obtain a chitosan-bentonite compound;
s2, heating 22kg of 65-mesh broussonetia papyrifera powder to 640 ℃, and pyrolyzing for 12S to obtain bio-oil; adding 10kg of water into the bio-oil, uniformly stirring, standing for layering, distilling the water phase at normal pressure, collecting distillate at 105 ℃, adding 108kg of chitosan-bentonite compound, and stirring at a low temperature of 1400r/min for 6min to obtain composite bentonite;
s3, mixing 122kg of composite bentonite, 27kg of polylactic acid with the molecular weight of 35 ten thousand and the melt flow rate of 35g/10min (210 ℃, 2.16kg), 12kg of urea, 1.7kg of erucamide and 1.2kg of heat stabilizer uniformly, adjusting the pH value of the system to 6.2-6.6, and granulating to obtain the slow release agent for preventing and controlling the diseases and insect pests of the garden plants.
Wherein the heat stabilizer is prepared from a calcium zinc stabilizer, epoxidized soybean oil and trioctyl phosphite according to a mass ratio of 28: 12: 5.
Example 4
A preparation method of a slow release agent for preventing and treating garden plant diseases and insect pests comprises the following steps:
s1, stirring 100kg of calcium bentonite for 18min at 82 ℃ at a stirring speed of 1150r/min, then reducing the stirring speed to 220r/min, adding 4kg of chitosan, continuing stirring for 1.3h, and standing for 8h to obtain a chitosan-bentonite compound;
s2, heating 18kg of 75-mesh broussonetia papyrifera powder to 620 ℃, and pyrolyzing for 18S to obtain bio-oil; adding 6kg of water into the bio-oil, uniformly stirring, standing for layering, distilling the water phase at normal pressure, collecting distillate at 107 ℃, adding 102kg of chitosan-bentonite compound, and stirring at low temperature for 10min at the stirring speed of 1200r/min to obtain composite bentonite;
s3, uniformly mixing 128kg of composite bentonite, 23kg of polylactic acid with molecular weight of 45 ten thousand and melt flow rate of 25g/10min (210 ℃, 2.16kg), 16kg of urea, 1.3kg of erucamide and 1.8kg of heat stabilizer, adjusting the pH value of the system to 6.2-6.6, and granulating to obtain the slow release agent for preventing and controlling the diseases and insect pests of the garden plants.
Wherein the heat stabilizer is prepared from a calcium zinc stabilizer, epoxidized soybean oil and trioctyl phosphite according to a mass ratio of 22: 14: 3, and (3).
Example 5
A preparation method of a slow release agent for preventing and treating garden plant diseases and insect pests comprises the following steps:
s1, stirring 100kg of calcium bentonite for 15min at 85 ℃ and at 1100r/min, reducing the stirring speed to 260r/min, adding 3kg of chitosan, continuing stirring for 1.5h, and standing for 7h to obtain a chitosan-bentonite compound;
s2, heating 20kg of broussonetia papyrifera powder of 70 meshes to 630 ℃, and pyrolyzing for 15S to obtain bio-oil; adding 8kg of water into the bio-oil, uniformly stirring, standing for layering, distilling the water phase at normal pressure, collecting distillate at 106 ℃, adding 105kg of chitosan-bentonite compound, and stirring at a low temperature of 1300r/min for 8min to obtain composite bentonite;
s3, uniformly mixing 125kg of composite bentonite, 25kg of polylactic acid with the molecular weight of 40 ten thousand and the melt flow rate of 30g/10min (210 ℃, 2.16kg), 14kg of urea, 1.5kg of erucamide and 1.5kg of heat stabilizer, adjusting the pH value of the system to 6.2-6.6, and granulating to obtain the slow release agent for preventing and controlling the diseases and insect pests of the garden plants.
Wherein the heat stabilizer is prepared from a calcium zinc stabilizer, epoxidized soybean oil and trioctyl phosphite according to a mass ratio of 25: 13: 4.
Comparative example 1
A preparation method of a slow release agent for preventing and treating garden plant diseases and insect pests comprises the following steps: 125kg of calcium bentonite, 25kg of polylactic acid with molecular weight of 40 ten thousand and melt flow rate of 30g/10min (210 ℃, 2.16kg), 14kg of urea, 1.5kg of erucamide and 1.5kg of heat stabilizer are mixed uniformly, the pH value of the system is adjusted to 6.2-6.6, and the slow release agent for preventing and controlling the diseases and pests of the garden plants is obtained by granulation.
Wherein the heat stabilizer is prepared from a calcium zinc stabilizer, epoxidized soybean oil and trioctyl phosphite according to a mass ratio of 25: 13: 4.
Comparative example 2
A preparation method of a slow release agent for preventing and treating garden plant diseases and insect pests comprises the following steps:
s1, heating 20kg of broussonetia papyrifera powder of 70 meshes to 630 ℃, and pyrolyzing for 15S to obtain bio-oil; adding 8kg of water into the bio-oil, uniformly stirring, standing for layering, distilling the water phase at normal pressure, collecting distillate at 106 ℃, adding 105kg of calcium bentonite, and stirring at a low temperature of 1300r/min for 8min to obtain composite bentonite;
s2, uniformly mixing 125kg of composite bentonite, 25kg of polylactic acid with the molecular weight of 40 ten thousand and the melt flow rate of 30g/10min (210 ℃, 2.16kg), 14kg of urea, 1.5kg of erucamide and 1.5kg of heat stabilizer, adjusting the pH value of the system to 6.2-6.6, and granulating to obtain the slow release agent for preventing and controlling the diseases and insect pests of the garden plants.
Wherein the heat stabilizer is prepared from a calcium zinc stabilizer, epoxidized soybean oil and trioctyl phosphite according to a mass ratio of 25: 13: 4.
Comparative example 3
A preparation method of a slow release agent for preventing and treating garden plant diseases and insect pests comprises the following steps:
s1, stirring 100kg of calcium-based bentonite for 15min at the stirring temperature of 85 ℃ and the stirring speed of 1100r/min, and then reducing the stirring speed to 260r/min to obtain pretreated bentonite;
s2, heating 20kg of broussonetia papyrifera powder of 70 meshes to 630 ℃, and pyrolyzing for 15S to obtain bio-oil; adding 8kg of water into the bio-oil, uniformly stirring, standing for layering, distilling the water phase at normal pressure, collecting distillate at 106 ℃, adding 105kg of pretreated bentonite, and stirring at a low temperature of 1300r/min for 8min to obtain composite bentonite;
s3, uniformly mixing 125kg of composite bentonite, 25kg of polylactic acid with the molecular weight of 40 ten thousand and the melt flow rate of 30g/10min (210 ℃, 2.16kg), 14kg of urea, 1.5kg of erucamide and 1.5kg of heat stabilizer, adjusting the pH value of the system to 6.2-6.6, and granulating to obtain the slow release agent for preventing and controlling the diseases and insect pests of the garden plants.
Wherein the heat stabilizer is prepared from a calcium zinc stabilizer, epoxidized soybean oil and trioctyl phosphite according to a mass ratio of 25: 13: 4.
The slow release agent for controlling garden plant diseases and insect pests obtained in example 5 and comparative examples 1-3 is subjected to antibacterial performance test, and the part 1 of the bactericide is determined according to NY/T1156.1-2006 indoor bioassay test criteria: the test is carried out by a concave glass method for a test for inhibiting the germination of pathogenic fungi spores, and the test results are as follows by taking pear scab as a test raw material:
| relative inhibition of spore germination% | Relative inhibition of spore germination after 1 month of culture% | |
| Example 5 | 100 | 96 |
| Comparative example 1 | 51 | 34 |
| Comparative example 2 | 68 | 49 |
| Comparative example 3 | 82 | 73 |
In a certain area of six-Anjinzhai, the slow release agent for controlling garden plant diseases and insect pests obtained in example 5 and comparative examples 1-3 is used for carrying out insecticidal performance test, the slow release agent is averagely divided into 12 experimental places, the experimental places are randomly divided into 4 groups, each group is repeated for 3 times, each group is respectively carried out by using the slow release agent for controlling garden plant diseases and insect pests obtained in example 5 and comparative examples 1-3, aphids and psyllids in the experimental places are taken as experimental targets, and after 1 month of the experiment, the statistical results are as follows:
| aphid-extermination rate% | The kill rate of psyllid insects% | |
| Example 5 | 100 | 97 |
| Comparative example 1 | 52 | 43 |
| Comparative example 2 | 74 | 69 |
| Comparative example 3 | 88 | 81 |
From the above two tables, it can be seen that: the slow release agent for preventing and controlling the garden plant diseases and insect pests, which is disclosed by the invention, has the advantages of long bacteriostatic time effect and good bacteriostatic and antibacterial effects; the invention is applied to the pest control of garden plants, and only needs to be buried at the root systems of the garden plants in the application process, so that the pest control effect is good, and degradation products can be further supplied to the garden plants as fertilizers for absorption, thereby being green, environment-friendly and pollution-free.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A preparation method of a slow release agent for preventing and treating garden plant diseases and insect pests is characterized by comprising the following steps:
s1, stirring the bentonite for 10-20min at the stirring temperature of 80-90 ℃ and the stirring speed of 1000-;
s2, heating the paper mulberry powder to 600-650 ℃, and pyrolyzing for 10-20S to obtain bio-oil; adding water into the bio-oil, uniformly stirring, standing for layering, distilling the water phase at normal pressure, collecting distillate at 104-108 ℃, adding the chitosan-bentonite compound, and stirring at low temperature to obtain composite bentonite;
s3, uniformly mixing the composite bentonite, the polylactic acid, the urea, the erucamide and the heat stabilizer, adjusting the pH value of the system to 6.2-6.6, and granulating to obtain the slow release agent for preventing and treating the diseases and insect pests of the garden plants.
2. The method for preparing a sustained-release agent for controlling garden plants and pests according to claim 1, wherein in S1, the bentonite is one of sodium bentonite, lithium bentonite and calcium bentonite, and is preferably calcium bentonite.
3. The preparation method of the slow release agent for controlling garden plant diseases and insect pests according to claim 1, wherein in S1, the mass ratio of calcium bentonite to chitosan is 100: 1-5.
4. The method for preparing a sustained-release agent for controlling garden plant diseases and insect pests according to claim 1, wherein in S2, the powder of paper mulberry is 60-80 mesh.
5. The method for preparing a sustained release agent for pest control of landscape plants according to claim 1, wherein in S2, the mass ratio of the broussonetia papyrifera powder, the water and the chitosan-bentonite compound is 15-25: 5-12: 100-110.
6. The method for preparing a sustained-release agent for controlling garden plants and pests according to claim 1, wherein in S3, the molecular weight of polylactic acid is 30-50 ten thousand, and the melt flow rate is 20-40g/10 min.
7. The method for preparing a sustained-release agent for pest control of landscape plants according to claim 1, wherein in S3, the heat stabilizer comprises: calcium zinc stabilizers, epoxidized soybean oil, and trioctyl phosphite.
8. The preparation method of the slow release agent for controlling garden plants and pests according to claim 7, wherein the mass ratio of the calcium zinc stabilizer to the epoxidized soybean oil to the trioctyl phosphite is 20-30: 10-15: 2-6.
9. The preparation method of the slow release agent for pest control of landscape plants as claimed in claim 1, wherein in S3, the mass ratio of the composite bentonite, the polylactic acid, the urea, the erucamide and the heat stabilizer is 120-130: 20-30: 10-18: 1-2: 1-2.
10. A slow release agent for preventing and treating landscape plant diseases and insect pests, which is characterized by being prepared by the preparation method of the slow release agent for preventing and treating landscape plant diseases and insect pests according to any one of claims 1 to 9.
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Application publication date: 20201215 |