Method for controlling pineapple's blackheart disease by jasmonic acid methyl ester

Abstract

The invention discloses a method for controlling a pineapple's blackheart disease by jasmonic acid methyl ester. The method comprises the steps that 25 days to 40 days before pineapples are picked, a jasmonic acid methyl ester water solution of 1-100 mu mol / L is sprayed on the surfaces of pineapple fruits; and the pineapples are picked, then aired and stored in a refrigeration storage at the temperature of 8-10 DEG C. According to the method, the 1-100 mu mol / L jasmonic acid methyl ester water solution is sprayed on the surfaces of the pineapple fruits during a picking time, so that the polyphenol oxidase activity and the peroxidase activity of the pineapples can be reduced effectively, and the pineapples are prevented from suffering from the blackheart disease. The method is simple in operation, low in cost and high in applying efficiency, and can be popularized easily; at the same time, the storage period of the pineapples is prolonged, the economic loss of a dealer can be 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 also 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 utilizing methyl jasmonate. 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...

AI Technical Summary

Problems solved by technology

Studies have found that a certain concentration of MeJA can effectively inhibit gray mold of strawberry, blue mold of grapefruit, banana anthracnose and tomato root rot, etc.; MeJA can reduce the electrolyte permeability and proline content of cucumber cell membrane, etc. Cucumber chilling injury symptoms; MeJA can inhibit banana peel catalase (CAT) and ascorbate oxidase (APX) activities, induce the accumulation of reactive oxygen species, alleviate postharvest banana chilling injury symptoms, and induce plasma membrane NADPH oxidase and Ca 2+ -Increase in ATPase activity, but no reports of methyl jasmonate controlling pineapple black heart disease