Comparative bioefficacy of selected plant extracts and
some commercial biopesticides against important
household pest, Periplaneta americana
Iram Khan and Ayesha Qamar
Section of Entomology,
Department of Zoology,
Aligarh Muslim University,
Aligarh 202002, UP, India.
Owing to the fact that application of chemical insecticides cause adverse effect on beneficial organisms,
pollute the environment and are detrimental for human health, plant based products are being tested for
the control of variety of insect pests. With this backdrop of knowledge, the present study was carried out
to test and compare the bioefficacy of some botanicals with those of commercially available biopesticides
against Periplaneta americana. Antifeedant activity and toxicity of commercial formulations of
Anosom®, Derisom®, Margosom® and ethanolic extract of Argemone mexicana, Nerium oleander,
Parthenium hysterophorus were evaluated. Antifeedancy was assessed by taking the weight at pre and
post treatment and percent starvation was calculated. Derisom exhibited 83.24% starvation whereas the
least percent starvation recorded in A. mexicana (51.84%) at the highest concentrations after 24 hrs of
treatment. The LC50 values of Anosom, Derisom, Margosom, A. mexicana, N. oleander and P.
hysterophorus was found to be 0.038%, 0.022%, 0.031%, 6.12%, 4.85% and 4.54% respectively. Based
upon the present experiment, plant extracts have efficacy comparable to that of commercial biopesticides
currently in use and thus they have the potential for development as commercial insecticides.
Keywords: P. americana, Biopesticides, Argemone mexicana, Nerium oleander, Parthenium
hysterophorus, LC50, Antifeedant activity.