Efficacy of Four Botanicals and Two Chemical Fungicides In The Control of Crown Rot Disease of Banana (Musa Spp AAAA) Cv. Medium Cavendish
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Date
December, 2009
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Abstract
Botryodiplodia theobromae was isolated and identified as the main causative agent or
pathogen involved in crown rot disease of bananas collected from Fremponso and Volta
River Estate Limited of the Atiwa and Asuogyaman districts in the Eastern region of
Ghana. Aspergillus niger and Aspergillus flavus were isolated and identified as part of
the crown rot organisms from infected crowns of bananas and these were nonpathogenic
when inoculated into healthy matured crowns of green bananas. Different
concentrations of botanical and chemical fungicides were prepared and tested for their
effectiveness on Medium Cavendish banana inoculated with Botryodiplodia
theobromae to find out which treatment best controls crown rot disease. There were
significant differences (P<0.05) in the effectiveness of these treatments in controlling
the crown rot pathogen. The rot pathogen, Botryodiplodia theobromae when inoculated
into healthy hands of Medium Cavendish banana and treated with botanical and
chemical fungicides had effect on postharvest quality parameters such as total soluble
solids and total titratable acidity. Pulp to peel ratio, pH and percentage weight loss were
not affected by these treatments. Medium Cavendish banana inoculated and treated with
Moringa oleifera (leaf extract), Azadirachta indica (seed extract) and Cassia alata (leaf
extract) developed the disease in day 3. Medium Cavendish banana treated with
Zingiber officinale (rhizome extract), ShavitF71.5WP and Mancozeb developed crown
rot in days 5, 6 and 8 respectively. ShavitF71.5WP at a concentration of 2.0g/l and
Mancozeb at a concentration of 7.0g/l offered good protection against crown rot disease
of banana. Zingiber officinale (rhizome extract) at a concentration of 66.67% w/v was
the most effective of the botanicals tested against crown rot disease. ShavitF71.5WP
was superior to Mancozeb.
Description
A Thesis Submitted To the School of Graduate Studies,
Kwame Nkrumah University of Science and Technology
In Partial Fulfilment of the Requirements of the Degree
For The Award of Master of Science in Postharvest Physiology.