Abstract:
Cold storage environment was studied to assess its effect on post-harvest disease
of potato in selected cold storage of Nilphamari district of Bangladesh. Total 360
samples of potato were collected from cold storages of Nilphamari districts viz.
Shawon cold storage, Angkur seed & cold storage and Mukta cold storage during
July, 2018 to December, 2018. Internal condition of cold-storages viz.
temperature (
0
C/
0
F), Relative humidity (%), O
2
ii
supply & CO
2
removal and NH
3
supply were recorded during the study period. The recorded parameters in the
storage were; temperature ranged from 2.22
0
C/36
0
F to 4.44
0
C/40
F, relative
humidity 85-90%, CO
2
removal and O
2
supply 48 minutes to 1 hr and NH
3
0
supply
9 to 13 hrs observed. Five significant pathogens were identified among them two
fungi viz. Fusarium oxysporum (dry rot) and Rhizopus stolonifera (rhizopus rot)
and three bacteria Erwinia carotovora (soft rot), Streptomyces scabies (scab) and
Rasltonia solanecearum (brown rot). Storage disease incidence of potato was
recorded and variations were observed which depended on internal conditions.
The disease incidence of dry rot, rhizopus rot, soft rot, scab and brown rot was
ranged from 0.85 to 0.30%, 0.40 to 0.0%, 0.50 to 0.10%, 0.50 to 0.19% and 0.62
to 0.11% respectively. Maximum disease incidence of storage tuber was
recorded in July, 2018 while minimum loss was found in December, 2018.
Description:
A Thesis
Submitted to the Faculty of Agriculture
Sher-e-Bangla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
PLANT PATHOLOGY
