Abstract:
An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural
University, Dhaka to evaluate the bio-control agents for the eco-friendly management of
okra shoot and fruit borer. The experiment was comprised of seven treatments including
untreated control following Randomized Complete Block Design (RCBD) with three
replications. The treatments of the experiment were T1= Application of Trichogramma
evanescense @ 5 Tricho card / plot at 7 days interval, T2= Application of Trichogramma
evanescense @ 0.08 g / plot at 7 days interval, T3= Application of Bracon hebetor @ 10
adults (Male: Female = 4: 6)/ plot at 7 days interval, T4= Application of Bracon hebetor
@ 15 adults (Male: Female = 6: 4)/ plot at 7 days interval, T5= Application of Bacillus
thuringiensis Serovar kurstaki @ 2ml suspension /liter water / plot at 7 days interval, T6=
Application of Bacillus thuringiensis Serovar kurstaki @ 1ml suspension /liter of water /
plot at 7 days interval, T7= Untreated control. The treatment (T5) gave the best result in
reducing the shoot infestation (57.90%), as well as fruit infestation by number and weight
(55.28% and 48.97%, respectively). The highest yield (6310 kg/ha) as well as (43.50%)
and girth (23.07%) of fruits and yield (54.85%) of okra was produced in T5. Similarly, the
highest BCR (11.41) was achieved byT5, which was higher than all other treatments.
Description:
A Thesis
Submitted to the faculty of Agricultural,
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (M.S.)
IN
ENTOMOLOGY
SEMESTER: JANUARY-JUNE, 2010