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An investigation was conducted for obtaining information on the
reduction of postharvest losses, pattern of physical, biochemical
and mineral content changes, storability as well as shelf life of
postharvest mango. The trials included four different experiments
involving two factors where variety was a factor comprising of
Langra and Khirshapat. These varieties were treated with different
postharvest treatments viz., control, paraffin coating, perforated
polyethylene cover, unperforated polyethylene cover, hot water (55
1)0C, low temperature in refrigerator (4 1)0C; different doses of
Maleic hydrazide, GA3 and Bavistin DF solution. These experiments
were laid out in Randomized Complete Block Design with three
replicates. Different postharvest treatments subjected to the
investigation demonstrated significant variation in most of the
physicochemical properties and shelf life of mango. Low temperature
in refrigerator was the best inhibitor of ethylene synthesis that
delayed ripening and prolonged shelf life. The second suitable
method was found to be 400 ppm of GA3 which is cost effective and
might easily be adopted by common farmers for mango preservation.
Taxonomic investigation of the family Asteraceae (Compositae)
growing throughout the Rajshahi Division situated in the northern
part of Bangladesh was carried out. A total of 36 species under 29
genera of the family Asteraceae were collected and identified. Of
the total number of species, 8 were found under cultivation and 28
grow wild in the study area. Ageratum conyzoides, Blumea lacera,
Eclipta alba, Tridax procumbens, Vernonia patula and Xanthium
indicum were recorded as densely populated and Mikania cordata as
the only climbing species. Blumea laciniata and Wedelia trilobata
have been reported here for the first time from Rajshahi Division,
and Perthenium hysterophorus as a new record from Bangladesh. Of
the total number of species in the study area, 97.22% were recorded
in Rajshahi district; 77.77% in Natore district; 75% in Nawabgonj
district; 61.11% in Naogaon district; 72.22% in Bogra district and
66.66% in Joypurhat district. Finally, a new system of
classification of the family Asteraceae has been proposed on the
basis of morphological, anatomical and floral characters.
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Paperback
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R398
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Discovery Miles 3 300
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