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Chitosan preparation and application thereof on controlling black spot of harvested sweet potato

A technology of chitosan and black spot disease, which is applied in the application field of chitosan in the prevention and treatment of sweet potato black spot disease, can solve the problems of environmental pollution and human harm, and achieve the prevention and treatment of black spot disease with low cost and good control effect Effect

Inactive Publication Date: 2017-12-26
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to provide a chitosan preparation and its application in the prevention and treatment of sweet potato black spot, which solves the problems that the existing medicaments are harmful to the human body and pollutes the environment, so that it can easily and effectively prevent the occurrence of sweet potato black spot

Method used

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  • Chitosan preparation and application thereof on controlling black spot of harvested sweet potato
  • Chitosan preparation and application thereof on controlling black spot of harvested sweet potato
  • Chitosan preparation and application thereof on controlling black spot of harvested sweet potato

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Embodiment Construction

[0016] The specific technical scheme is as follows:

[0017] 1. The preparation method of chitosan preparation

[0018] Weigh 1.5g of chitosan powder with a viscosity of 60-70mPa.s and a degree of deacetylation of 85-90%, irradiate it with an ultraviolet lamp for 12h in an ultra-clean workbench, add an appropriate amount of sterile water, and stir slightly until the chitosan powder is in the Fully swell in water, add 0.5 mL of acetic acid dropwise, stir magnetically until the chitosan is completely dissolved, add sterile water to make up to 100 mL, and prepare a chitosan mother solution with a concentration of 15 mg / mL. The concentration of the chitosan mother liquor can be adjusted to 0.25-2mg / mL according to the doubling dilution method, and the pH can be adjusted to 6.0-6.5 with NaOH solution. When used, the concentration of chitosan can be adjusted as needed.

[0019] 2. Effect of chitosan preparation on mycelial growth and sporulation of sweet potato black spot fungus ...

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Abstract

The invention belongs to the field of agriculture product disease control, and specifically relates to an application of chitosan on controlling black spot of sweet potato. The invention provides a chitosan preparation. The viscosity of chitosan in the preparation is 60-70 mPa.s; the deacetylation degree is 85-90%; the chitosan concentration of the preparation is 0.25-2 mg / mL, and the pH is 6.0-6.5. The provided preparation is used to prevent and treat sweet potato black spot, and the experiment results show that the effect on controlling sweet potato black spot is very good.

Description

technical field [0001] The invention belongs to the field of prevention and control of agricultural product diseases, and in particular relates to the application of chitosan in the prevention and treatment of sweet potato black spot. Background technique [0002] Sweet potato is a new type of modern health food, which has a good development prospect in the field of biomedical resources. But sweet potato is a disease-prone crop, and sweet potato black spot is an important disease widely distributed in sweet potato production. The disease is caused by the infection of Ceratocystis fimbriata Ellis et Halsted, which mainly damages the root tuber and the base of the seedling stem, and is easy to invade from the wound. The infection in the seedling stage is mostly caused by the infection of the seed potato, and the damage is the most serious in the storage period. It is the most serious common disease in each sweet potato production area, and it can occur in the seedling stage, ...

Claims

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Application Information

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IPC IPC(8): A01N43/16A01P3/00
CPCA01N43/16
Inventor 邢珂李腾杰刘元芳李哲韩丹张宇李宗芸秦盛
Owner XUZHOU NORMAL UNIVERSITY