Abstract:
A pot and lab experiments were conducted in Bio-agents laboratory and the net
house of The Department of Plant Pathology, Sher-e-Bangla Agricultural
University, Dhaka-1207, Bangladesh during the period from July,2019 to June,
2020. The study was carried out to evaluate the efficacy of selected compatible
bio-agent viz. Verticillium lecanii (T
1
iii
), Beauveria bassiana (T
2)
, Metarhizium
anisopliae (T
3
), Trichoderma viride (T
4
) and botanicals viz.Tea wastage (T
5
),
Neem leaves extract (T
6
), Allamanda leaves extract (T
7
) against the pathogen of
rhizome rot disease responsible for ginger decline. The selected bio-agents were
applied as a bio-fortified materials. In the pot bio-agents were bio-fortified with
the selected substrates; cow dung, mustard oil cake, poultry manure, dust and
wheat grain. Data on disease incidence and disease severity was recorded at 50,
70 and 90 Days After Planting (DAP). Among the selected bio-agents the lowest
disease incidence and severity was found in T
3
(Metarhizium anisopliae) and the
highest in T
1
(Verticillium lecanii). Among the selected botanicals the lowest
disease incidence and severity was found in T
5
(Tea wastage) and the highest
was found in T
7
(Allamanda leaf extract). No disease was found in T
6
(Neem
extract) treatment up to harvesting. The selected treatments were also gave the
promising performance in inhibition of radial mycelial growth of Fusarium
oxysporum over untreated control. From the in-vitro management study it was
found that Trichoderma viride (T
4
) and Metarhizium anisopliae (T
3
) gave the
better performance in inhibition of radial mycelial growth. Among the
botanicals, neem extract gave the promising performance in inhibition of radial
mycelial growth. However, from the present study it may be concluded that
Metarhizium anisopliae, Trichoderma viride and Neem leaf extract can be used
for management of rhizome rot disease of ginger.
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
