Abstract:
Tomato fruits are more susceptible to spoilage by fungi because it contains large
amount of water. This study was conducted at Plant Pathology Laboratory, Sher-eBangla
Agricultural University, Dhaka-1207 during October 2019 to September
2020 on cultural characterization and pathogenicity of fungi associated with the
spoilage of postharvest tomato fruits in different local markets viz Kawran bazar,
Farmgate, Taltola, Agargaon bazar, Townhall and Krishi market of Dhaka city.
From infected tomato, post-harvest disease infecting fungi were incubated and
isolated on moist chamber followed isolation on PDA media.The lowest
percentage incidence found in Taltola bazar (20%) and the highest in Farmgate
(48.89%). Both in winter season and summer season, highest percentage incidence
occurred in Farmgate bazar (48.89%). Seven different genera of fungi were
isolated and identified viz. Aspergillus niger, Aspergillus flavus, Penicillium spp.,
Fusarium oxysporum, Alternaria solani, Rhizopus stolonifer and Geotrichum
candidum. In winter season, Fusarium oxysporum occurred most frequency
(23.46%) Geotrichum candidum (2.04%) had the lowest percentage frequency. In
summer season, Alternaria solani occurred most frequency (23.91%) while
Geotrichum candidum (3.26%) and Penicillium sp (3.26%) had the lowest
percentage frequency. The identified diseases were Fusarium rot of tomato,
Aspergillus ear rot of tomato, Aspergillus black mold disease, Black spot disease
of tomato, Blue mold disease, Rhizopus rot disease and sour rot disease of tomato.
Pathogenicity test showed that all the isolated fungi were pathogenic to their
respective host.
Description:
A Thesis
Submitted to the Department of Entomology
Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
Plant Pathology
