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A sulfonylated chitosan microcapsule preparation for preventing and controlling botrytis cinerea

A technology of sulfonylated shells and microcapsules, applied in the field of pesticide preparation research, can solve problems such as falling flowers and fruits, the impact on the yield and quality of vegetables in protected areas, and the economic loss of vegetable farmers.

Active Publication Date: 2021-07-16
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low temperature and high humidity in winter and spring in vegetable greenhouses, this disease can cause vegetable leaves to wither, flowers and fruits to fall, which has a great impact on the yield and quality of vegetables in protected areas, and causes large economic losses to vegetable farmers.

Method used

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  • A sulfonylated chitosan microcapsule preparation for preventing and controlling botrytis cinerea
  • A sulfonylated chitosan microcapsule preparation for preventing and controlling botrytis cinerea
  • A sulfonylated chitosan microcapsule preparation for preventing and controlling botrytis cinerea

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、14

[0027] Example 1, 14.0% nipyrrolidin·procymidone microcapsules: the mass concentration of nipyrrolidin and procymidone in the microcapsules is 2.0%, and the mass concentration of procymidone is 12.0%.

[0028] Preparation method: Accurately weigh the effective composition of 2.5g of nipyrrolicin and 15g of procymidone to be loaded into a flask, add 60mL of acetone and ethanol mixed solvent (the volume ratio of acetone to methanol is 2:1), Dissolve the active ingredients nipyrrolidin and procymidone under magnetic stirring, then add 98 g of sulfonyl chitosan nanocarriers prepared above, add 50 mL of three-distilled water drop by drop at a rate of 1 drop / s, and continue stirring for 4 hours to fully dissolve the solvent. After volatilization, 5 mL of antifreeze agent propylene glycol was added, and then transferred to a petri dish. Air bubbles and non-volatile organic solvents were removed under reduced pressure and vacuum, and then transferred to a -80°C refrigerator for pre-fre...

Embodiment 2、10

[0029] Example 2, 10.0% nipyrrolidin·procymidone microcapsules: the mass concentration of nipyrrolidin and procymidone in the microcapsules is 2.0%, and the mass concentration of procymidone is 8.0%.

[0030] Preparation method: Accurately weigh the effective composition of 2.5g of nipyrrolicin and 10g of procymidone to be loaded into a flask, add 60mL of acetone and ethanol mixed solvent (the volume ratio of acetone to methanol is 2:1), Dissolve the active ingredients nipyrrolidin and procymidone under magnetic stirring, then add 108 g of sulfonyl chitosan nanocarriers prepared above, add 40 mL of three-distilled water drop by drop at a rate of 1 drop / s, and continue stirring for 4 hours to fully dissolve the solvent. After volatilization, 5 mL of antifreeze agent propylene glycol was added, and then transferred to a petri dish. Air bubbles and non-volatile organic solvents were removed under reduced pressure and vacuum, and then transferred to a -80°C refrigerator for pre-fre...

Embodiment 3、6

[0031] Example 3, 6.0% nipyrrolidin·procymidone microcapsules: the mass concentration of nipyrrolidin and procymidone in the microcapsules is 2.0%, and the mass concentration of procymidone is 4.0%.

[0032] Preparation method: Accurately weigh the active composition of 2.5 g of nipyrrolicin and 5 g of procymidone to be loaded into a flask, add 50 mL of acetone and ethanol mixed solvent (the volume ratio of acetone and methanol is 2:1), Dissolve the active ingredients nipyrrolicin and procymidone under magnetic stirring, then add 108 g of sulfonyl chitosan nanocarriers prepared above, add 50 mL of triple distilled water drop by drop at a rate of 1 drop / s, and continue stirring for 4 hours to fully dissolve the solvent. After volatilization, 5 mL of antifreeze agent propylene glycol was added, and then transferred to a petri dish. Air bubbles and non-volatile organic solvents were removed under reduced pressure and vacuum, and then transferred to a -80°C refrigerator for pre-fre...

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Abstract

The invention relates to a sulfonylated chitosan microcapsule preparation for preventing and controlling vegetable gray mold, which comprises active ingredients, sulfonylated chitosan capsule wall materials and auxiliary agents; it is characterized in that: the microcapsule preparation is effective The ingredients include nipyrrolidin (3-chloro-4-(2-nitro-3-chloro-phenyl)pyrrole), procymidone; in microcapsule preparations, nipyrrolidin accounts for the mass of the total mass of microcapsule preparations The percentage is 0.1-20%, the mass percentage of procymidone to the total mass of the microcapsule preparation is 0.1-20%, and the rest is sulfonylated chitosan capsule wall material and auxiliary agent. Through the present invention, it helps to improve its targeting and intelligence, avoids the rapid degradation of active ingredients, prolongs the effective period, reduces the amount of pesticide application, and improves the control effect, which is of great significance to the development of biological pesticides and the construction of food safety projects. Great significance.

Description

technical field [0001] The invention relates to a sulfonylated chitosan microcapsule preparation for preventing and controlling vegetable gray mold, and belongs to the field of pesticide formulation research. Background technique [0002] At present, in the production process of fruits and vegetables in greenhouses, the diseases caused by pathogenic fungi are particularly serious, and the excessive and frequent use of traditional chemical pesticides has caused problems such as excessive pesticide residues in fruits, vegetables and grains, and deterioration of the soil microenvironment. Therefore, the research and development of microbial agents or biological pesticides that can replace chemical pesticides has huge market potential and application prospects. The use of beneficial microorganisms for biological control is an important way to control diseases and reduce chemical pollution. Among them, the biocontrol bacteria of the genus Pseudomonas and Bacillus have been studi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01N25/28A01N43/36A01N53/00A01N37/32A01P3/00C07D303/22A01G13/00C08B37/08
CPCA01G13/00A01N25/28A01N37/32A01N43/36A01N53/00C07D303/22C08B37/003
Inventor 陈小军范添乐张清霞沈殿晶胡珊任亚军张铭瑞王智超杨春梅杨益众宋玥颐任莉张迎
Owner YANGZHOU UNIV