Oviposition deterrent, repellent and ovicidal activity of Pterolobium hexapetalum (Fab.) against the stored grain pest, Callosobruchus maculatus (Coleoptera: Chrysomelidae)
Saranya J, Elumalai Kuppusamy
The oviposition deterrent, repellent and ovicidal activities of P. hexapetallum against the stored pest - Callosobruchus maculatus. P. hexapetalum leaveswas examined with increasing polarity of different organic solvents like hexane, dichloromethane and ethanol at various concentrations of 200-600 ppm against C. maculatus under the laboratory conditions. After 24 hours there was a significant activity noted against c. maculatus but the highest activity was detected after 72 hours in the ethanol extract for the concentration of 600ppm. The remaining two organic solvents also exhibited oviposition deterrent, repellent and ovicidal activities but ethanol portrayed the peak activity. Therefore, P. hexapetalum has the best phytopesticidal constituents to treat against the stored pest and it also creates no harm to the environment because of its easy biodegradable and non-toxic nature.