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Method for controlling pineapple's blackheart disease by low-temperature treatment

A pineapple black heart disease and low-temperature treatment technology is applied in the direction of freezing/cold storage of fruits/vegetables, etc., which can solve the problems of complex mechanism of pineapple black heart disease, reduce polyphenol oxidase activity and peroxidase activity, and easily The effect of promotion and simple operation

Inactive Publication Date: 2013-05-01
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complexity of the occurrence mechanism of pineapple black heart disease, no effective method for controlling black heart disease has been found at present. The above methods can only reduce the occurrence of black heart disease to a certain extent.

Method used

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  • Method for controlling pineapple's blackheart disease by low-temperature treatment
  • Method for controlling pineapple's blackheart disease by low-temperature treatment
  • Method for controlling pineapple's blackheart disease by low-temperature treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] After the pineapple (Ananas comosus (Linn.) Merrill, the same below) is harvested, immediately soak it in cold water at 3°C ​​for 20 minutes, take it out of the water and dry it naturally, then store it in a cold storage at 3°C ​​for 30 days;

[0021] The pineapples stored at 3°C ​​after soaking in cold water at 3°C ​​did not develop black heart disease after 30 days of storage, while the control (pineapples stored at 20-25°C) had very serious black heart disease after 30 days of storage, with a disease index of 4.8 (see table 2), completely lost the commodity value.

[0022] Table 2 embodiment 1 prevents and treats the result of pineapple black heart disease

[0023]

[0024] Note: *Evaluation of the severity of black heart disease: refer to the method of Stewart et al. (2001). The degree of browning of the pineapple core was divided into 0-5 grades. Grade 0: No browning; Grade 1: Browning area is less than 25% of the total longitudinal section area; Grade 2: Brow...

Embodiment 2

[0027] Immediately after harvesting the pineapple, soak it in cold water at 4°C for 35 minutes, take the pineapple out of the water and dry it naturally, then store it in a cold storage at 5°C for 30 days;

[0028] After being soaked in cold water at 4.5°C, the pineapples stored at 4.5°C for 30 days did not develop black heart disease after 30 days of storage, while the control (pineapples stored at 20-25°C) had very serious black heart disease after 30 days of storage. Index 4.8 (see Table 3), completely lost commodity value.

[0029] Table 3 embodiment 2 prevents and treats the result of pineapple black heart disease

[0030]

Embodiment 3

[0032] Immediately after harvesting the pineapple, soak it in cold water at 6°C for 50 minutes, take the pineapple out of the water and dry it naturally, then store it in a cold storage at 6°C for 30 days;

[0033] After soaking in cold water at 6°C for 50 minutes, no black heart disease occurred in the pineapples stored at 6°C for 30 days, while the control (pineapples stored at 20-25°C) had very serious black heart disease after 30 days of storage, with a disease index of 4.8 ( See Table 4), completely lost commodity value.

[0034] Table 4 embodiment 3 prevents and treats the result of pineapple black heart disease

[0035]

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Abstract

The invention discloses a method for controlling a pineapple's blackheart disease by low-temperature treatment. The method comprises the steps that pineapples picked within 24 hours are soaked with cold water at the temperature ranging between 3 DEG C and 6 DEG C for 20-50 minutes, then aired, and stored in a refrigerator at the temperature of 3-6 DEG C. The method can reduce the activity of polyphenol oxidases and the activity of peroxidases of the pineapples effectively, so that the pineapple's blackheart disease can be controlled effectively, and the pineapples can be stored for 30 days and prevented from suffering from the blackheart disease. The method is simple in operation and low in cost, and can be popularized easily; at the same time, the storage period of the pineapples is prolonged, and the loss of the pineapples after picking is reduced effectively; the economic loss of a dealer is reduced effectively, the problem of a farmer that the pineapples are difficult to sell is solved, and the enthusiasm of the farmer for planting pineapples is protected; and the pineapples can be sold to countries all over the world by ship, more foreign currencies are earned for the country of the farmer, and good economic and social benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of pineapple preservation, and in particular relates to a method for controlling pineapple black heart disease by low-temperature treatment. Background technique [0002] Pineapple (Ananas comosus (Linn.) Merrill) is a perennial evergreen herbaceous fruit tree of the family Bromeliaceae (Ananas Miller). First, it has become a pillar industry of the rural economy in South China. According to FAO statistics, my country's pineapple output in 2007 was 1.44 million tons, ranking third in Asia and fourth in the world, accounting for 7.63% of the world's total pineapple output. However, the post-harvest loss of pineapple is quite alarming. Some data show that 21% to 50% or even more pineapple is lost after harvest. Black Heart (or Endogenous Brown Spot) is one of the main diseases of pineapple, and has become an important hazard of fresh pineapple during shipping and refrigeration. Pineapple black heart disease ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/04
Inventor 朱世江李丽
Owner SOUTH CHINA AGRI UNIV
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