Abstract:
A field experiment was conducted at the Plant Pathology experimental field of
Sher-e-Bangla Agricultural University, Dhaka, Bangladesh during October 2016
to March 2017. The study was aimed to manage the Tomato yellow leaf curl virus
(TYLCV) through insecticides, botanicals and physiological method using light
reflecting silver colored mulch. In this study, in total 7 treatments including
control were considered viz. T
=Neemax, T
5
= Multineem, T
1
6
=Imidacloprid, T
2
= ACmix, T
3
= Subicron, T
= light reflecting silver colored mulch and T
=
Control. High yielding tomato variety BARI Tomato-14 that is susceptible to
TYLCV was used. The field experiment was carried out in randomized complete
block design with three replications. All the treatments showed significant
influence on different assayed parameters in the test crop tomato. The lowest
disease incidence (%), disease severity (%) and whitefly association was found in
T
(light reflecting silver colored mulch) that was 13.33%, 1.96% and 2.0
respectively at 60 DAT. The highest disease incidence %, Disease severity % and
whitefly association was found in T
6
(control treatment) that was 46.67%, 46.22%
and 18 respectively at 60 DAT. From the relationship study between disease
incidence (%), and disease severity (%) with whitefly association, it was revealed
7,
7
4 that disease incidence and severity of TYLCV was increased with increasing of
whitefly population and vise-versa. Among the treatments, growth parameters,
yield and yield attributers were also found better in T
7,
treatment (light reflecting
silver colored mulch). From this study we can concluded that physical method is
the best option instead of insecticides for controlling the insect vectors of TYLCV.
Description:
A Thesis
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University,
Dhaka, in partial fulfillment
of the requirements
for the degree
of
MASTER OF SCIENCE
IN
PLANT PATHOLOGY
SEMESTER: JANUARY-JUNE, 2017
