Abstract:
Six experiments were conducted during the study period of which two experiments in
the laboratory of Entomology department and four experiments in the experimental
field of Sher-e-Bangla Agricultural University to study the taxonomic identification,
bio-ecology, varietal screening and management of thrips infesting mungbean from
February 2016 to June 2018. Two thrips species Megalurothrips usitatus and Thrips
palmi were identified on different plant parts of mungbean, causing damage to plants
and responsible for shedding flower bud and flower. The adult female of M. usitatus
was dark brown with 8-segmented antennae and the segment III was yellow. The male
of M. usitatus was smaller and paler with almost yellow legs and pronotum. Adult
female of T. palmi was yellow with 7-segmented antennae. A pair of ocellar setae was
located outside the triangular red pigmented ocelli. Average body length of adult
female and male M. usitatus was 1.97 ± 0.13 mm and 1.42 ± 0.12 mm, respectively,
and female T. palmi was 1.20 ± 0.02 mm. The incubation period, first instar larva,
second instar larva, prepupa, pupal period, and total developmental time
Description:
A Dissertation
Submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree of
DOCTOR OF PHILOSOPHY
IN
ENTOMOLOGY
SEMESTER: JULY-DECEMBER, 2018
