Assessment of the inhibitory effect of two local plants on the emergence of four weeds and identification of their secondary metabolites: Case of Parkia biglobosa (Jacq.) R.Br.ex G.Don. and Tephrosia purpurea (L.) Pers.
- International Journal of Agricultural Research, Innovation and Technology , 12 (2) : 74-81
Résumé
In Burkina Faso, Senna occidentalis, Ipomoea eriocarpa, Pupalia lappacea and Triumfetta
cordifolia are frequent weeds in the maize crop. This work evaluated the inhibitory effect of
Parkia biglobosa pods and Tephrosia purpurea leaves and identifies their chemical
compounds. Biological and chemical approaches were used to identify the weeds. The
inhibitory effect of powders was evaluated on weed germination and growth. Experimental
results showed that powders reduced both germination (p<0.001) and growth (p<0.016).
Parkia biglobosa pods were rich in total flavonoids (544.2±1.4 µg mg-1) and condensed
tannins (182.3±1.5 µg mg-1) than Tephrosia purpurea leaves which contained small amounts
of total flavonoids (6.7±1.7 µg mg-1) and condensed tannins (5.7±1.2 µg mg-1). Parkia
biglobosa pods could be used in the biological control of weeds.
Mots-clés
Biological control, Germination, Inhibitory plants, Organic compounds, Weeds