EFFECTS OF DIFFERENT TIME OF BAGGING ON FRUIT DEVELOPMENT, PHYSICO-CHEMICAL COMPOSITIONS AND SHELF LIFE OF MANGO CV. KHIRSAPAT

Abstract

An experiment was conducted at the mango orchard of Basherhat, near the Hajee Mohamma Danesh Science and Technology University, Dinajpur during March to July, 2017. The chemical analyses were conducted at Bangladesh Atomic Energy Commission, Agargaon, Dhaka and others parameters were conducted at Department of Horticulture, HSTU, Dinajpur, Bangladesh. The experimental treatment was arranged as a two-factor experiment, where factor „A‟ was different bagging times (viz. Bagging at 35, 45 and 55 days after fruit set) and factor „B‟ was different pre-harvest bagging materials (viz. T0: Non-bagged (control), T1: Brown paper double layered bag (BPB), T2: White paper single layered bag (WPB) and T3: Perforated transparent polythene bag (TPB).The experiment was laid out in the randomized completely block design with three replications (10 plants per replication) with a unit of 5 fruits per treatment per replication. The result showed that the pre-harvest bagging with brown paper bag and white paper bag at 35 days after fruit set contributed for best results for infestation of fruit fly infestation. When 45 days after fruit set gave best performance for total weight loss, pulp and stone weight, pH, total sugar, colour, appearance, shelf life, number of fruit immature fruit inside the bag and decreased infestation of fruit fly, disease of stem end rot, anthracnose .The white paper bag contributed best performance for total soluble solid. At 55 days after fruit set, brown paper bag and white paper bag improved total weight loss, pulp and stone weight, total soluble solid, pH, total sugar, number of fruit immature fruit inside the bag and decreased disease of stem end rot, anthracnose. It is advisable to use brown paper bag for getting colored fruits i.e., yellow colour since white paper bag for retains original colour of each variety. Both bags showed their potentiality against major insect-pests and diseases attack. Bagging fruits have a good shelf life which is important criteria for exportable mango. On the other hand, bagging fruits having attractive colour, farmer will get more market prices for their mangoes. Therefore, farmers might be used this technology for commercial mango cultivation for fulfill demand of quality mango in country and abroad.