Journal Of essential Oil Research (2009) 21:83-88

Justicia anselliana (Nees) T. anders essential oils compounds and allelopathic effects on cowpea Vigna unguiculata (L.) walp plant

DSS. Kpoviessi, JD. Gbenou, FA. Gbaguidi, L.Ahoussi, GC. Accrombessi, M. Moudachirou, J. Quetin-Leclercq*

Laboratoire de pharmacognosie et des huiles essentielles, Facultés des Sciences de la santé (FSS),
Facultés des Scaiences techniques (FAST), Université d'Abomey-Calavi (AUC) Cotonou, Bénin
*La boratoire de pharmacognosie, Université catholique de Louvain UCL 72 30-CHAM, Belgique

Abstract: Analysis of Justicia ancelliana essentieal oils by GC and GC/MS revealed the presence of béta-phellandrene (51.2%),
delta-2-carene (43.4%), dihydrotagetone (04%), propylbutyrate (0.3%), in the aerial parts and phenylacetaldehyde (39.2%), delta-3-carene (31.7%),
6-methyl-5hepten-2-one (16.4%) and alpha-phellandrene (12.6%) in the roots. These oils and their compounds induced a reduction
in the growth of the roots, the apparition of yellow leaves after two weeks of the treatment and the death of the Vigna unguiculata
young plants and showed a specific action on the germination and the growth of Zea mays, Vigna Unguiculata and Arachis hypogeae
plants. Béta-phellandrene and phenylacetaldehyde showed maximum inhibition to germination and the growth of Vigna unguiculata.