Insecticidal action of certain essential oils against callosobruchus maculatus (coleoptpera: bruchidae)

Krishnappa,K., Lakshmanan, S.,. Elumalai, K and Jayakumar,S

Certain important medicinal plant essential oils such as Curcuma longa, Zingiber officinale, Murraya koenigii and Ocimum caasiym were investigates for their insecticidal, antiovipositional and antifeedant activity against Callosobruchus maculatus among four essential oils highest percentage of mortality were showed in (58-81%) Ocimum canum at 500 ppm concentrations. All essential oils showed complete feeding deterrent action at 500ppm concentrations. Loss of fecundity was also noticed in all essential oils at higher concentrations. The maximum antiovipositional activity was recorded in 500 ppm of O.canum followed by M. koentigii, Z.officinale and C.longa.