Abstract:
An experiment was carried out at Sher-e-Bangla Agricultural University, Dhaka, Bangladesh
during the period from September, 2022 to February, 2023 to know the diversity of insect
foragers and pollination effect on Indian jujube (Ziziphus mauritiana) yield. Five treatments viz.,
without netting, netting with the net of .5mm hole, netting with the net of 2mm hole, netting
with the net of 3mm hole and netting with the net of 5mm hole were included in this study. The
experiment was laid out in Randomized Complete Block Design (RCBD) with four replications.
The survey found sixteen insect species visiting Indian jujube plants. These insects are from the
order hymenoptera, diptera, hemiptera, and coleoptera. Hymenopterans dominated throughout
the season. Apis cerana (29.06%) was the most frequent visitor followed by A. florea A.
dorsata (6.42%) and A. mellifera . A. cerana spent 4.47 seconds per bloom. A. cerana
and A. mellifera had the highest ( ) and lowest ( ) mean foraging rates respectively. The
diversity index for genus was found ( ) and for species ( ) respectively. The cyme bears
hermaphrodite and male flower at the ratio of ( ). Cyme without netting set the highest
(3.50±0.29) fruit. Netting with the net of .5mm hole and netting with the net of 2mm hole did
not set any fruit. Without netting, yield reached 40.7 kg/plant which was highly significant from
rest of the treatments. From this study it is evident that the role of pollinators on Indian jujube is
very significant.
Description:
A Thesis
Submitted to Department of Entomology,
Faculty of Agriculture.
Sher-e-Bangla Agricultural University,
Dhaka-
In partial fulfillment of the requirements for the degree of
MASTERS OF SCIENCE (MS)
IN
Prof. Dr. Ayesha Akter
Supervisor
ENTOMOLOGY
