Abstract:
ABSTRACT
A field experiment was conducted during March to June 2016 in the central farm of
Sher-e- Bangla Agricultural University , Dhaka-1207.The main objective was to
manage the mungbean yellow mosaic by controlling the insect vector whitefly using
two selective insecticides namely Imitaf and ACmix. The experiment was conducted
with BARI Mungbean-5.Different growth parameters, yield attributes and
physiological features were significantly affected by application of selected
insecticides with different number of spray. In case of Imitaf, the lowest disease
incidence, per plant (10.12 %) and per plot (3.51
%), and disease severity (7.21%)
was recorded in four times spray (T
4)
at 70 DAS
.
The highest
disease incidence, per
plant (36.50 %) and per plot (11.37 %), and disease
severity (23.33% ) was recorded
in control treatment at 70 DAS . In case of
ACmix, the lowest disease incidence, per
plant (12.21 %) and per plot (4.21 %),
and disease severity (7.53 %) was also recorded
in T
4
at 70 DAS. The highest
disease incidence, per plant (36.49 %) and per plot
(11.37 %), and disease severity
(36.67 % ) was recorded in control
at 70 DAS. The
highest number of flower, no of pod and yield was also found in T
4
in case of Imitaf
and ACmix. But the
yield and yield contributing characterswas found to be better in
imitaf than ACmixs. The
highest chlorophyll content was recorded in four times
spray(T
4)
in both cases Imitaf (49.62µ mol m
1
-2
s
-1
)
and ACmix (56.80 µ mol m
). The lowest chlorophyll content was recorded in T
0
in case of both insecticides
application. However from the
results of the study it was revealed that Imitaf had
better efficacy to control the insect vectors (whitefly) of MYMV with four times spray.
-2
s
-
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
