Abstract:
An experiment was conducted at the laboratory of the Plant Physiology Section
and Postharvest Laboratory under the Horticulture Research Centre (HRC),
Joydebpur, Gazipur, during the period from June to July, 2006 to study the
effect of postharvest treatment and ethrel on ripening and quality of mango
fruits during storage. Mature green mangoes (cv. Langra) were treated with
normal and hot water with four ethrel concentrations viz. control (0 ppm), 500
ppm, l 000 ppm and 1500 ppm ethrel. The experiment was laid out in a
completely randomized design (factorial) with three replications. Types of
solutions, different ethrel concentrations and their combinations showed
significant variation on ripening and quality of mango fruits except moisture
content. The hot water treatment with 1000 ppm ethrel treated mangoes gave
the highest shelf life (14 days), TSS (22.64%), reducing sugar (5.96%),
ascorbic acid ( 18.16 mg/I OOg pulp), pH (5. 77) at 8th days of storage and non
reducing sugar (16.93%) and total sugar (20.80%) at 61h days of storage. On the
other hand, the lowest percent rottening (33.27%), titrable acidity (0.08%) and
weight loss (11.27%) were found in hot water with 1000 ppm ethrel during 81h
days of storage. The quick ripening (1 day) and lowest value of ascorbic acid
were found in hot water with 1500 ppm ethrel treatment. From the
investigation, it may be concluded that hot water with I 000 ppm ethrel
treatment was found most effective for ripening and better quality of mango.
