Abstract:
The study was conducted in the laboratory of the Department of Entomology, Sher-e-
Bangla Agricultural University, Dhaka, Bangladesh during the period from July, 2014 to
February, 2015 to find out the varietal response of rice on growth and development of
Angoumois grain moth, Sitotroga cerealella (Oliv.) and to find out the resistant/tolerant
varieties in storage. The experiments were laid out in Completely Randomized Design
(CRD) with four replications. The rice varieties tested were BR 11, BR 22, BR 26, BRRI
dhan 28, BRRI dhan 29, BRRI dhan 49, BRRI dhan 50, BINA 7, ACI-1 (hybrid) and
Chamak-1 (hybrid). It was found that none of the varieties were completely immune to S.
cerealella. But Significant differences were observed among ten rice varieties on larval
incidence, adult emergence, grain damage percentage, seed germination percentage and
grain content loss by S. cerealella. The highest larval incidence was found in BRRI dhan
50 (83.33 %) and the lowest was in BR 11 (30.00 %). Highest number of adult
emergence occurred in BRRI dhan 50 (77.67) and lowest number of adult emergence was
found in BR (27.67). The highest grain content loss was observed in BRRI dhan 50 (6.89
%) and the lowest was in BR 11 (0.61 %). Moreover highest number of seed germination
was found in BR 11 (73.33) and the lowest number was in BRRI dhan 50 (18.67 %). In
no choice, test highest grain damage was found in BRRI dhan 50 (10.00 %) and lowest
grain damage was in BR 11 (1.11 %). The highest grain content loss was in BRRI dhan
50 (10.02 %) and the lowest grain content loss was in BR 11 (1.16 %). In free choice, test
highest grain damage occurred in BRRI dhan 50 (9.00 %) and the lowest damage
occurred in BR 11 (1.00 %). The highest grain content loss was observed in BRRI dhan
50 (9.02 %) and the lowest grain content loss was in BR 11 (1.02 %). Among the rice
varieties BRRI dhan 50 was found the most susceptible host for S. cerealella in respect of
both growth and development and food consumption. On the other hand, BR 11 was the
resistant variety for S. cerealella.
Description:
A Thesis
Submitted to Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
ENTOMOLOGY
SEMESTER: JANUARY- JUNE, 2015