The two formulation were used in the study and larvicidal
efficiency was observed. Growth retardation and delay in the
development of larvae to the pupal stage was observed at
72 hrs of incubation. This may due to chemical compounds
present in the extract that prevented normal pupation
and adult emergence from occurring. When treated with
formulation 1, only 15 % of adults, 25 % of pupa and 60% of
them remained as larvae even after 72 hrs of treatment. It
is very evident that inhibition in the metamorphosis from
the larval to pupal stage took place. Moreover the feeding