Abstract:
A study was conducted in the village Kachubari of Thakurgaon district in a
litchi orchard to keep record of the diversity and relative abundance of litchi
flower visiting insect and to see the production difference in the condition of
netting (T
2
) and without netting (T
1
). In without netting (T
) condition, the
maximum number of inflorescences per branch was 8.01(no.) whereas the
minimum no was 8.03 (no.) in netting condition. The percentage of Male,
Female and Hermaphrodite flower was 28%, 40% and 32% respectively. We
have found different kind of insect’s species that visit the litchi flower
including honeybees, ants, different flies and some other insects. The most
visited pollinator were Honeybee (49.72%) then Ant (36.5%) and the lowest
visited was Dipteran (22%). The other foraging insects were some
Lepidopteran, Coleopteran, Hemipteran etc. The foraging time of the
honeybees were high at 6.00am to 8.00am and 4.00 pm to 6.00 pm. The
butterflies were present during 10.00 pm to 2.00 pm. Other than honeybees the
ant and the flies were noticed almost throughout the day. In the netting
condition the flies, honeybees, butterfly, beetles and other foraging insects
were not able to enter the net but ants were seen in the net. The yield difference
between the netting and without netting condition was very significant. In
netting condition, the yield was 8% (0.11 kg/branch) whereas without netting
condition it was 92% (1.28 kg/branch) due to the pollinating agent. From this
study it is evident that the role of pollinators on litchi orchard is very
significant. It also helps to let us know to conserve pollinator in Litchi orchard.
Description:
A Thesis
Submitted to the Department 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
