Abstract:
The study was conducted on the efficacy of commonly used botanicals for the
management of angoumois grain moth, Sitotroga cerealella (Olivier) on stored wheat
and maize grains in the laboratory of the department of Entomology, Sher-e-Bangla
Agricultural University, Dhaka-1207 during January to May, 2014. The treatments of
the studies were: T1 = Black pepper dust @ 5g/Kg on the upper layer of the grains,T2
= Neem seed kernel dust @ 10g/Kg on the upper layer of the grains, T3 = Tobacco
leaves dust @ 7 g/Kg on the upper layer of the grains, T4= Neem oil wettable cloth @
1.0 ml/tissue paper (20x20 cm2) on the upper layer of the grains, T5= Lantana Leaves
dust @ 10 g/Kg on the upper layer of the grains, T6 = Nishinda Leaves dust @ 10
g/Kg on the upper layer of the grains and T7= Untreated Control. The study was laid
out in a Completely Randomized Design (CRD) with three replications. It was
observed that more damages occurred in stored wheat grains than maize grains. T3
treatment (using tobacco leaves dust) and T4 treatment (using neem oil) were more
effective than all other treatments against insect mortality, adult emergence and
repellency effect on S. cerealella. In 1st generation, there were no infested grains (both
wheat and maize) by weight and number basis were observed from T3 and T4
treatments treated grains respectively. The highest infested grains by weight (22.71%
and 48.25%) and by number (25.85% and 57.82%) were recorded from T7 untreated
control grains of these two types of grains. But in 2nd generation, 100% infested grains
by weight and number basis were recorded from T7 untreated control grains in case of
stored wheat grains, whereas 54.77% and 63.77% infested grains by weight and
number basis were recorded from T7 untreated control grains respectively in case of
stored maize grains and on the other hand the lowest percentage of infestation of
maize grains (0.00 %) were obtained T3 and T4treatments respectively. Similar trend
of infestation was also observed in case of stored maize grains in 3rd generation and
after 2nd generation wheat grains were completely damaged by this insect.
Description:
A Thesis
Submitted to the Department of Entomology
Sher-e-Bangla Agricultural University,
Dhaka, in partial fulfillment
of the requirements
for the degree of
MASTER OF SCIENCE
IN
ENTOMOLOGY
SEMESTER: JANUARY-JUNE, 2013
