Abstract:
The study was conducted in the laboratory under the Department of Entomology, Sher-eBangla
Agricultural University, Dhaka, Bangladesh during the period from April to
September, 2011 to find out the efficiency of some botanicals and fumigants applied
against Angoumois grain moth, Sitotrogra cerealella Olivier on stored paddy. The study
was conducted under the two separate experiments considering botanical and fumigant
based management. In case of botanical based experiment, five botanicals viz., dried leaf
powder of neem @ 2.5 g/kg paddy, bishkatali @ 2.5 g/kg paddy, marigold @ 2.5 g/kg
paddy, mahogany @ 2.5 g/kg paddy, chopped garlic bulb @ 1.0 g/kg paddy along with
one untreated control were evaluated. While in case of fumigant based experiment, three
fumigants viz. camphor @ 1.0 gm/kg paddy, phostoxin tablet @ 200 mg/kg paddy,
naphthalene @ 500 mg/kg paddy along with one untreated control were evaluated. The
experiments were laid out in Completely Randomized Design (CRD) with 4 replications.
Data were recorded on grain infestation by number and weight, seed germination and
economic returns of the management practices in terms of benefit cost ratio (BCR).
Among five promising botanicals,dried neem leaf powder reduced the highest grain
infestation by number and weight (72.77% & 62.07%, respectively) as well as the
highest % germination saved over control (28.74%) . The highest (11.65) benefit cost
ratio (BCR) was also achieved by the dried neem leaf powder than other botanicals.
Among three promising fumigants, both camphor phostoxin tablet reduced the highest
percent of grain infestation (100%) by number and weight, Conversely, camphor saved
the highest percent of seed germination over control (35.81%) than other fumigants. The
camphor was also considered as the most economically viable tool for the management
of rice moth,S. cerealella on rice gains in storage, which gave the highest (14.08)benefit
cost ratio (BCR) than phostoxintablet (5.25).
Description:
A thesis
Submitted to theDepartment of Entomology,Faculty of Agriculture,
Sher-e-Bangla Agricultural University,Dhaka
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE(MS)
IN
ENTOMOLOGY
SEMESTER:JANUARY-JUNE, 2011
