Abstract:
The present experiment was conducted at the experimental field of Sher-e-Bangla
Agricultural University, Dhaka, Bangladesh to find out the efficacy of bio-rational
management practices including bio-control agents against Brinjal Shoot and Fruit
Borer (BSFB) during October, 2018 to March, 2019. This experiment tested on a
Hybrid brinjal variety “Begun-706” laid out in RCBD with 3 replications. The
experiment comprised eight treatments viz., T
1
= Cultural + mechanical control
method, T
2
= Braconid wasps @ 20-25/plot + sanitation, T
3
= Sanitation + Funnel
Pheromone trap, T
4
= Sanitation + Sevin 50 WP @ 1.0g/L of water, T
5
= Success 2.5
EC @ 0.5 ml/L of water + Pheromone trap, T
6
= Spinosad 45% SC @ 0.01% + Funnel
Pheromone trap, T
7
= Sanitation + Trichogramma evanescens @ 1 card/plot (1000
eggs per card) and T
8
= Untreated control. The plots treated with T
5
treatment, resulted
significantly lowest percentage of infested shoot, flower and fruit, which was
statistically similar with T
6
treatment during the whole period and the highest
infestation was found in T
8
treatment followed by T
1
treatment. The yield contributing
characters found highest in T
5
treatment for length, girth and weight of individual fruit
and was statistically similar to T
6
treatment. In case of yield, T
5
(56.65 t ha
) showed
the best result which was statistically similar with T
6
(53.88 t ha
-1
-1
) followed by T
4
(28.45 t ha
-1
), T
7
(27.43 t ha
-1
), T
2
(25.10 t ha
-1
), T
3
(24.02 t ha
-1
) and the lowest result
was found in T
8
(23.66 t ha
-1
) followed by T
1
(33.20 t ha
-1
). Percent increase over
control was higher in T
5
(139.42%), statistically similar with T
6
(127.73%).
Therefore, T
5
and T
6
exhibited more than two times higher yield than T
8
. From this
study, it was concluded that T
5
(Success 2.5 EC @ 0.5 ml/L of water + Pheromone
trap)
was the most viable bio-rational options for L. orbonalis management which was
statistically similar with T
6
(Spinosad 45% SC @ 0.01% + Funnel Pheromone trap).
