Abstract:
In vitro and in vivo experiments were conducted to evaluate the effect of sowing
times and organic soil amendments for the management of foot and root rot of
lentil caused by Sclerotium rolfsii at Sher-e-Bangla Agricultural University,
Dhaka, Bangladesh during the period from October 2019 to March 2020. Six
different sowing times viz. 25 October, 5 November, 15 November, 25 November,
5 December and 15 December and nine organic soil amendments viz. poultry
refuse, mustard oil cake, neem oil cake, vermicompost, cowdung, trichocompost,
biochar, sawdust and ash were assessed against the disease. Susceptible variety
BARI Masur-1 was used in this experiment. In pot experiments, the lowest disease
incidence was recorded in seed sowing on 15 December (15.22%) at 60 days after
inoculation (DAI) where the highest disease incidence was recorded in seed
sowing on 25 October (49.67%) at same DAI. In case of soil amendment, the
lowest disease incidence was recorded in Trichocompost (8.96%) applied pot
where the highest incidence was in control (57.65%) pot at 60 DAI. In all cases,
growth parameters viz. germination (%), plant height (cm), no. of branch, vigor
index and other yield contributing characters were the highest in seed sowing on
15 December and in Trichocompost treated pot. In field experiment,
Trichocompost showed the best result with lowest disease incidence (11.11%) and
the highest yield (170.11 g/m
2
). However, the highest disease incidence (58.89%)
with the lowest yield (74.44 g/m
2
) were recorded in control plot. From the above
findings, pre-sowing soil application with Trichocompost with late seed sowing
after first week of December is recommended to manage foot and root rot of lentil
disease.
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