Isolation and Identification of Two Potent Phytotoxic Substances from Afzelia xylocarpa for Controlling Weeds

Phytotoxic substances released from plants are considered eco-friendly alternatives for controlling weeds in agricultural production. In this study, the leaves of Afzelia xylocarpa (Kurz) Craib. were investigated biological activity, and their active determined. Extracts A. leaf exhibited concentration-dependent phytotoxic activity against seedling length Lepidium sativum L., Medicago sativa Phleum pratense Echinochloa crus-galli (L.) P. Beauv. Bioassay-guided fractionation extracts led to isolating identifying two compounds: vanillic acid trans-ferulic acid. Both compounds applied four model using different concentrations. The results showed both significantly inhibited plants’ a species-dependent manner (p < 0.05). effects (IC50 = 0.42 2.43 mM) on much greater than that 0.73 3.17 was most sensitive compounds. addition, application an equimolar (0.3 mixture synergistic root L. sativum. These suggest its could be used as natural source herbicides.