MANAGEMENT OF POST-HARVEST DISEASE (BLACK MOULD FRUIT ROT) OF POMEGRANATE (Punica granatum L.) TO IMPROVE THE SHELFLIFE
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Date
2016-12-27
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BENGALURU
Abstract
The experiment was carried out at Laboratory, Division of Horticulture, UAS,
GKVK, Bengaluru, during September 2015-May 2016. The experiment was laid out in a
Completely Randomized Design with four replications and 11 treatments.
The survey was conducted in four districts of fruit markets for the incidence of
black mould rot in pomegranate. The highest (12.48 %) in Chitradurga and lowest
incidence (4.44 %) in Bengaluru districts was noticed. Various factors such as
environmental factors, inoculumn density, handling and presence of concentration of
micro-biotic components on fruit surface influences the variation in disease incidence
during months surveyed.
Maximum decay of fruits by pathogen has been recorded at 30° C. The percentage
of fruit rot greatly affected with higher humidity. Hot water treatment proved effective
against various fruit rots at 50±1°C for 10 minutes reduced severity of the rot
significantly.
Fruits were treated with different fungicides, oils and food preservatives showed
effective control of the fruit rot. Severity of the rot was maximum in fruit inoculated at
ripe stage. Fungicide Carbendazim proved most effective in pre-and post-inoculation
treatment. Castor oil was effective against inhibit the disease growth. In foodpreservatives
treatment, KMS proved effective in controlling the rot in pre and postinoculation
treatment. Total sugars contents of the fruit during storage ranged from
13.00-14.65 % have the highest significant contents in chemical method, while the lowest
amount was recorded in oil treatment method. Xtend packaging showed good response in
maintaining quality of pomegranate fruits after 12 weeks of storage at 20° C.
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