Abstract:
A study was carried out at the Department of Plant Pathology, Sher-e-Bangla
Agricultural University (SAU), Dhaka-1207, Bangladesh during the period from
November 2015 to May 2016 in order to find out the management options of early
blight of tomato through selected botanicals and chemical fungicides. Eight
treatments viz. T
1
(Foliar spray of Bavistin 50 WP @ 1 g/liter), T
(Foliar spray of
Dithane M-45 @ 4.5 g/liter), T
3
2
(Foliar spray of Rovral 50 WP @ 2 g/liter), T
(Foliar spray of Topgun @ 7 g/liter), T
(Foliar spray of Neem leaf extract @ 1:3
w/v), T
6
5
(Foliar spray of Marigold leaf extract @ 1:6 w/v), T
(Foliar spray of
Papaya leaf extract @ 1:3 w/v) and T
8
7
(Control) were used for the present study.
BARI released variety BARI tomato 2 (Ratan) was used as planting material.
Under the present study, among all the fungicides, T
(Foliar spray of Rovral 50
WP @ 2 g/liter) showed the best promising result in terms of lowest disease
3
4
incidence (9.63%) with highest % of reduction (86.75%) over control. In terms of
growth and yield contributing parameters, The highest plant height (117.80 cm),
number of branches plant
-1
(13.80), Number of fruits plant
-1
(36.67), Fruit yield
plant
-1
(1.12 kg) and Fruit yield ha
-1
(65.33 t) were obtained from T
(Foliar spray
of Rovral 50 WP @ 2 g/liter) compared to all the treatments. Botanicals also
provided promising results against early blight control of tomato. Among the
tested botanicals T
(Neem leaf extract @ 1:3 w/v) showed effective control
against early blight of tomato followed by marigold extracts.
5
3
Description:
A Thesis
Submitted to the Department of Plant Pathology
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, 2016
