Postharvest treatments with 1-methylcyclopropene in 'Tommy Atkins' mango fruit: effect of doses and number of applications.
Lima M. A. C. de, Silva A. L. da, Azevedo S. S. N., Santos P. de S.
Author Affiliation: Embrapa Semi-Árido, BR 428, Km 152, Caixa Postal 23, 56.302-970, Petrolina, PE, Brazil.
Revista Brasileira de Fruticultura 28 : 64-68
Abstract : Two experiments were carried out with the objective of evaluating the efficiency of treatments with 1-MCP on 'Tommy Atkins' mango fruit conservation, using different doses and number of applications. The fruits were harvested at the stage 2 of maturation from a commercial orchard in Petrolina, Pernambuco State, Brazil. In the first experiment, the following was tested: doses (0; 600; 1200 and 2400 nl litre-1), applied at 25°C; and storage time (0, 2, 4, 7, 9, 10 and 11 days) under room temperature (26.7±2.0°C). The experimental design was completely randomized, with a 4×7 (doses of 1-MCP × storage time) factorial and 4 replicates. In the second experiment, the following was studied: doses and number of applications (control, one application of 900 nl litre-1, one application of 1200 nl l-1 and two applications of 900 nl l-1); and storage time (0, 7, 15, 18, 20, 22, 25 and 26 days). The fruits kept refrigerated (11.0±1.6°C and 88±7% RH) until the 15th day, when they were transferred to room temperature (26.3±2.1°C and 44±6% RH). The first or single application occurred at the harvest time and the second one occurred at the 14th day. In this experiment, the experimental design was completely randomized, with a 4×8 (doses and number of applications of 1-MCP × storage time) factorial and 4 replicates. The 1-MCP affected the pulp firmness and the most efficient dose in retarding of softening was 1200 nl l-1. One application of 1200 nl l-1 or two applications of 900 nl l-1 under refrigeration had the same effects. However, the logistics changes promoted by a single application are reduced.