Abstract:
A study was conducted in order to assess the bacteria associated with post-harvest
decay of cold storage potato. Rotten potatoes were collected from cold storage of
Homna upazilla under Comilla district of Bangladesh. The experiment was
conducted in the MS Laboratory of Department of Plant Pathology, Faculty of
Agriculture, Sher-e-Bangla Agricultural University during the period of November
2016 to August 2017. Four different bacteria (species) were isolated from the
different rotten potato tubers following dilution plate method on NA medium. The
isolated bacteria were Pectobacterium carotovorum,Ralstonia solanacearum,
Pseudomonas spp. and Bacillus spp. Out of these four bacteria isolated,
Pectobacterium and Ralstonia were more abundant. Bacteria were identified based
on morphological and biochemical tests. All the isolated bacteria showed positive
results except Bacillus spp in potato soft rotting test. Pectobacterium, Ralstonia
solanacearum and Pseudomonas spp. were pathogenic for storage potato while
Bacillus spp. was possibly a secondary micro flora or saprophyte that manifested
as contaminants.
Description:
A Thesis
Submitted to the Department of Plant Pathology
Sher-e-Bangla Agricultural University, Dhaka in
partial fulfillment of the requirements for the
degree
of
MASTER OF SCIENCE (MS)
IN
PLANT PATHOLOGY
SEMESTER: JULY-DECEMBER, 2016
