Abstract:
Chilli (Capsicum frutescens) is one of the most important spice and vegetable crop in
the world which belongs to Solanaceae family. A field experiment was conducted at
the central field of Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during
December 2020 to May 2021. The study was aim to assess the disease incidence (%)
and the percent disease index of Chilli leaf curl virus under natural field condition by
using different treatments through vector control activities. In this study, total 9
treatment were used viz. T
1
(Neem leaf extract), T
2
ii
(Mahogoni leaf extract), T
3
(Garlic
extract),T
4
(Trichoderma +Raw cow milk), T
5
(Malathion @ 3ml/L),T
6
(Lantana leaf
extract),T
7
(Raw cow milk), T
8
(Trichoderma),T
9
(Marigold leaf extract) and one
without treatment served as control (T
0
).The field experiment was carried out in
randomized complete block design (RCBD) with three replications. Among all the
treatments, the minimum disease incidence, were recorded in T
5
(Malathion) and T
1
(Neem leaf extract) which were showed better performance aganist ChLCV. A
positive correlation was found between white fly population and disease incidence as
well as yield loss and white fly population. Infection by chilli leaf curl disease
adversely affected growth and yield attributing characters. However, these two
treatments T
5
(Malathion) and T
1
(Neem leaf extract) may be considered as better
option to manage ChLCV through vector control.
Description:
A Thesis
Submitted to the faculty of Agriculture,
Sher-e-Bangla Agricultural University,Bangladesh,
in partial fullfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
PLANT PATHOLOGY
SEMESTER: JANUARY-JUNE,2021
