Action of essential oils from two aromatic plants from Ivory Coast on Callosobruchus maculatus F. of cowpea.

Action of essential oils from two aromatic plants from Ivory Coast on Callosobruchus maculatus F. of cowpea. The essential oils extracted by hydrodistillation of two aromatic plants from western Africa - Melaleuca quinquenervia (L) et Ocimum gratissimum (L) - have been tested by fumigation with various concentrations on adults of the not-'voiliere' shape of Callosobruchus maculatus Fab., at a temperature of 27.5 +/- 0.2 degreesC and at a relative humidity of 80.3 +/- 1.6%. These oils present an insecticidal activity and induce in the females of C. maculatus a very significant reduction of lying compared with that in the control. The essential oil of M. quinquenervia with CL50 = 3.09 mul l(-1) seems more effective than that of C. gratissimum. To cite this article: B.P Seri-Kouassi et al., C. R. Chimie 7 (2004). (C) 2004 Publie par Elsevier SAS pour Academie des sciences.