Abstract:
The experiment was conducted at the farm of Sher-e-Bangla Agricultural
University, Dhaka during the Kharjf -2 season from June to November, 2012 to
study host preferences of Epilachna beetle on different varieties of brinjal plant.
Each variety was considered as individual treatment. There were ten varieties of
brinjal. viz. T1 = Shamli, T1 = Muktakeshi, r3 = Yashaswi, T4 = Mohini, Tc =
Anondo, T6 = Sandhya, 'I'7 = Harshita. Tg = Dark staflon, I9 = Shingnath and
= Islampuri. The experiment was laid out in a Randomized Complete Block
Design (RCBD) with three replications. Incidence of epilachna beetle showed
significant variation on different varieties of brinjal. Among the varieties. Harsitha
was found to be the most tolerant against epilachna beetle pest based on the
incidence of minimum number of epilachna beetle, number of eggmass and number
of grubs per plant was recorded. Varieties of brinjal on epilachna beetle
significantly influenced on growth characteristics of rose whereas minimum
number of infested plant per plot, minimum number of infested leaf per plant and
minimum number of infested fruit per plant were found from 1-larshita variety. The
maximum number of healthy and epilachna free brinjal per plant was found in
Harshita variety. Yield per plant was significantly influenced by the different
varieties of brinjal on epilachna beetle. The highest yield per plant (1777.00 g) was
obtained from Harshita variety of brinjal. On the other hand, the lowest yield per
plant (155.2 g) was found from Shamli variety of brinjal. These results indicate that
the Harshita variety is tolerant to epilachna beetle of brinjal as well as on growth
and yield among all the varietal treatments in this study.
Description:
A Thesis
Submitted to the Faculty of Agriculture.
Sher-e-I3angla Agricultural University, Dhaka,
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
ENTOMOLOGY
SEMESTER: January-.June/2013
