Abstract:
The present experiment was conducted to study the incidence of insect pests in broccoli and their
eco-friendly management using neem products during November 2019 to February 2020 at the
central experimental field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh. The
experiment comprised of seven different treatments (neem oil, neem seed kernel extract, neem
seed extract, neem leaf extract, neem bark, extract, neem bark powder and untreated control).
The experiment was laid out in Randomized Complete Block Design with three replications.
Different treatments expressed significant differences on morphological, physiological
parameters, yield attributing traits and yield of broccoli. Among different treatments, neem oil
showed the best performance in reducing the number of cabbage worm, diamondback moth,
cabbage semi-looper, aphid and flea beetle (1.73 cabbage worm, 1.59 diamondback moth, 1.17
cabbage semi-looper, 1.16 aphid and 0.87 flea beetle, respectively), leaf infestation (15.41%) and
plant infestation (33.33%) per five tagged plants and increased plant height, leaf length, leaf
breadth, card length, card diameter, card perimeter and yield (42.69 cm, 40.12 cm, 13.76 cm,
22.11 cm, 20.11 cm, 38.23 cm, 16.23 ton ha
-1
, respectively) of broccoli. The order of rank of
efficacy of the treatments applied against the insect pests of broccoli was
T
1
>T
4
>T
2
>T
3
>T
6
>T
5
>T
7
. From the experiment it was revealed that, neam oil is a good
botanicals against the insect pests of broccoli which is eco-friendly and non-hazardous to human
health.
Description:
A Thesis
Submitted to the Faculty of Agriculture, Dept. of Entomology
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
ENTOMOLOGY
