Abstract:
An experiment was conducted in the experimental field of Sher-e-Bangla
Agricultural University, Dhaka, Bangladesh during the period from January,
2020 to April, 2020. The experiment was laid out in factorial Randomized
Complete Block Design (2 factor) replicated with three times. For this study,
factor A- T
1
= Imidacloprid (30 EC was1.5 ml/L of water at 15 days interval);
T
2
= Neem oil (5 ml/L of water at 15 days interval); T
3
= Control while factor
B- V
1
= BARI Dheros-1; V
2
= BARI Dheros-2; V
3
= Ok-285 V
4
= Green finger;
V
5
= Arko anamika. Results revealed that sustainable management of okra pod
borer on different varieties of okra that significantly effect on most of the yield
and yield contributing parameters studied in this experiment. Similarly, most of
the traits were also affected significantly due to the combination effects. In case
of varietal performance, BARI Dheros-1 (V
1
) showed best results in terms
shoot infestation against pod borer infestations, percentage of infested fruit,
fruit infestation at weight basis, fruit length, fruit girth, number of fruit Plant
,
single fruit weight, number of branch plant
-1
, yield. In case of different
treatments, T
1
= Imidacloprid (30 EC was applied at the rate of 1.5 ml/L at 15
days interval) showed outstanding performance of percent reducing the number
of fruit borer and which provided better growth and higher yield as compared
other treatments. Again, in case of combinations of varieties and different
treatments, the number pod borer infestation reduced in T
1
V
1
and showed best
results in terms of percentage of infested fruit, fruit infestation at weight basis,
fruit length, fruit girth, number of fruit Plant
-1
, single fruit weight, number of
branch plant
-1
, yield. There was negative relationship present in number of pod
borer and fruit infestation in weight basis with the yield of okra, i.e. when the
number of pod borer and percentage of fruit infestation in weight basis was
increased the yield of okra was decreased.
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
ENTOMOLOGY
