Abstract:
The study was conducted to investigate biorational management of sucking insect
pests of okra in the research field of Sher-e-Bangla Agricultural University, Dhaka
during the period from October, 2020 to February 2021. The experiment consisted of
the management practices (T
1
= Spinosad @ 0.5 ml/L of water; T
= Matrine @ 1.0
ml/L of water; T
3
= Thiamethoxam @ 0.2 g/L of water; T
ii
4
2
= Neem oil @ 5.0 ml/L of
water with detergent; T
5
= Abamectin @ 1.0 ml/L of water; T
= Buprofezin @ 0.2
g/L of water and T
7
6
= Untreated control) are applied at 7 days interval. The experiment
was designed with Randomized Complete Block Design (RCBD) with three
replications. Data on different pest incidence level of infestation, yield attributes and
yield were collected and recorded. At total fruiting stage, in number basis, considering
the % fruit infestation, the lowest infested fruits per plant were recorded from
Buprofezin @ 0.2 g/L of water (33.62%), while the highest infested fruits were
recorded in control (44.21%). The lowest plant infestation was found from Buprofezin
(34.25%), whereas the highest infested plants were recorded in untreated control
(46.33%). The tallest plant was recorded from neem oil (244.9 cm), while the shortest
plant was found from Spinosad (195.2 cm). The highest yield of fruits was observed
from Buprofezin @ 0.2 g/L of water at 7 days interval (15.59 ton/ha), while the lowest
yield per hectare was found from control (11.36 ton/ha). Among the treatments,
Buprofezin @ 0.2 g/L of water at 7 days interval was more effective for the
controlling of insect pests as well as highest yield contributing characters and yield of
Okra.
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
