Abstract:
The experiment was conducted at the experimental field of Sher-e-Bangla
Agricultural University, Dhaka, Bangladesh during the period from June to
November, 2009 to find out the most effective management practice(s) among
Trichogramma evanescens egg parasitoid @ 0.25 gm and 0.50 gm plot-1, Bacillus
thuriengiensis bacterium suspension @ 0.1% and 0.2%, SafeClean @ 0.05%,
SafeMax @ 0.05%, Neem oil @ 0.3% and chemical insecticide Furadan 5G @ 6 gm
plot-1 for the eco-friendly management of rice stem borer on hybrid rice (Hira-2). The
experiment was laid out in Randomized Complete Block Design (RCBD) with three
replications. Considering the dead heart and white head infestation, among the
treatments chemical insecticide Furadan 5G (T8) performed as the most effective
practice in reducing the dead heart (81.47%) and white head (91.44%) infestation over
control followed by Trichogramma egg parasitoid @ 0.50% (T2) treatment (73.64%
and 82.34%, respectively). T8also gave the maximum yield contribution characters of
the rice plants as well as produced the highest grain yield (7.67 ton ha-1) followed by
T2 (7.23 ton ha-1). Economically the most effective treatment was T2, through which
the highest benefit cost ratio (5.04) was achieved as compared with other treatments
including Furadan 5G (3.80). Considering the ecological point of view, the T2
comprising Trichogramma evanescens egg parasitoid @ 0.50 gm plot-1 was the most
ecologically sound management practice applied against rice stem borer.
Description:
A thesis
Submitted to theFaculty of Agriculture,
Sher-e-Bangla Agricultural University,Dhaka
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
ENTOMOLOGY
SEMESTER:JULY-DECEMBER, 2009
