Abstract :
Sub-lethal doses ( 0.0001, 0.0002 and 0.0004% ) of pyrethrum extract caused a significantly dosedependent
reduction in glycogen level and alkaline phosphatase activity and a significantly dose dependent
enhancement in reducing sugar level and acid phosphatase activity in haemolymph and fat body tissues of the larva
of rice-moth, C. cephalonica. It was observed that 0.0004% dose level of this extract caused maximum effect on these
biochemical parameters. It may be concluded that pyrethrum extract induced alterations in the carbohydrate levels
and phosphatase activities in haemolymph and fat body tissues which results into biochemical perturbations
leading to death. So, application of pyrethrum extract is of course beneficial for the effective control of rice-moth, C.
cephalonica in particular and lepidopterous pests in general in eco-friendly way.
Keyword :
Pyrethrum extract, Corcyra cephalonica, Haemolymph, Fat body, Biochemistry