Abstract:
An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural
University, Dhaka, Bangladesh during the period from October, 2019 to February, 2020. The
experiment was laid out in Randomized Complete Block Design (2 factor) replicated with three
times. For this study, factor A- T1 = Bumper 20SL was applied at the rate of 1.5 ml/L at 15
days interval); T2 = Neem oil (applied at the rate of 5 ml/L at 15 days interval); T3 = Control
and factor B- V1= BARI Dheros-1; V2= BARI Dheros-2; V3= Ok-285 V4= Green finger; V5=
Arko anamika. Results revealed that sustainable management of jassid 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 effect. In case of varietal performance, BARI Dheros-1 (V1) showed best results in
terms of the number jassid infestation, 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. In case of different treatments, T1 = Bumper (20SL was applied at the rate of 1.5
ml/L at 15 days interval) showed outstanding performance for percent reducing the number of
insect pests and getting the better growth and higher yield compared to those of other
treatments. Again in case of combinations of varieties and different treatments, the number
jassid infestation was reduced in T1V1 and T1V1 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 jassid and percentage of fruit infestation in weight basis with the yield of okra, i.e.
when the number of jassid 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
