Abstract:
A study was carried out at the Department of Plant Pathology, Sher-e-Bangla
Agricultural University (SAU), Dhaka-1207, Bangladesh during the period of
October’ 2016 to May’ 2017 in order to find out the effect of different planting
time on Tomato yellow leaf curl virus (TYLCV) of tomato and its impact on the
yield. Two collected BARI released variety namely BARI Tomato-14 and BARI
Tomato-16 were used in this study that was transplanted at three different
planting time (1
st
planting time on 1
st
November, 2
nd
planting time on 15
November 2016 and 3
rd
planting time on 1
st
December 2016). The lowest percent
disease incidence (12.42%) and percent disease severity (15.37%) were found in
3
rd
planting (1
st
December planting) and BARI Tomato-16 variety. Under the
present study, considering the percentage of TYLCV disease incidence and
severity, whitefly population infestation, growth and yield contributing
characters as well as the yield of two tomato varieties in three different planting
time; the 3
rd
planting (1
st
December planting) and BARI Tomato-16 variety was
found having the highest yield (77.23 ton/ha) and promising the lowest level of
percentage of disease incidence (12.42%) and disease severity (15.37%) against
TYLCV. The percent disease incidence and severity were found positively
correlated with temperature. A strong positive correlation was obtained between
the whitefly population and (%) disease incidence of TYLCV. Whitefly
population and yield of tomato were negatively correlated with each other. The
yield was also found significant negatively correlated with the percentage of
TYLCV disease incidence.
th
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 (MS)
IN
PLANT PATHOLOGY
SEMESTER: JANUARY-JUNE, 2017
