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Fungi Associated with Rotten Fruits in Dhaka Metropolis

MA BASHAR
Department of Botany, University of Dhaka, Dhaka-1000, Bangladesh

S SHAMSI
Department of Botany, University of Dhaka, Dhaka-1000, Bangladesh

M HOSSAIN
Department of Botany, University of Dhaka, Dhaka-1000, Bangladesh

Abstract/ Executive Summary:

A total of 18 species of fungi were isolated from 25 samples of rotten fruits. From infected apple nine fungal species representing five genera were isolated. In this fruit the frequency of association of Aspergillus niger was highest (44%) and Curvularia sp. was lowest (1.33%). This reveals that the species of Aspergillus were the predominating fungi in apple rot. In banana, eleven fungal species representing eight genera were isolated from the samples examined. Frequency of association of Rhizopus nigricans was highest in it (14%). Five fungal species representing four genera were isolated from the samples of rotten grapes. Frequency of association of R. nigricans was highest (19.33%) and lowest in A. niger (10.67%). Rhizopus sp. was the predominating fungi associated with grape rot. In case of litchi six fungal species representing five genera were isolated from the rotted samples. In this fruit the frequency of association of Colletotrichum sp.1 was highest (20.66%). Eleven fungal species representing seven genera were isolated from infected fruits of mango. Frequency of association of A. niger was highest (20.00%). Aspergillus niger was the predominating fungi in mango rot.

Keywords: Fungi, Fruit rot, Dhaka metropolis

Location: Different markets of Dhaka metropolis

Start Date:

End Date:

Program Area: Pest Management

Commodity: Fruit

Objectives:

To find out fungi associated with rotten fruits in Dhaka metropolis.

Methodology:

Five economically important fruits i.e. apple (Pyrus malus L.), banana (Musa paradisiaca L.), grape (Vitis vinifer L.), litchi (Litchi chinensis L.) and mango (Mangifera indica L.) were selected for this experiment. All the fruits were collected from different markets of Dhaka metropolis. Symptoms of the rotten fruits were recorded. Local fruits like banana and mango showed more fungal association than apple, grape and litchi. The fungi associated with the infected fruits were isolated on PDA medium from the collected samples following tissue planting method at pH 6.0. Thirty inocula each of 2 sq. mm in size were prepared from each sample. The surface of which was sterilized with 10% Chlorox for 3 min. Three inocula were inoculated in each sterilized Petri plate with solidified agar medium and incubated for 5-7 days at 25-28ºC. The fungi growing out of each inoculum was examined and identified following the standard literature. Per cent frequency of the occurrence of the fungal isolates was calculated by adopting the standard formula. The symptoms of different rotten fruits were recorded.

Source of Information: Bangladesh J. Bot. 41(1): 115-117, 2012 (June)

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The results of the experiment suggested that rotten fruits nourishes various types of fungi. Some of them produces mycotoxin which may cause harm to the consumers.

Knowledge Management: Journal