The potential allelopathic contribution of aqueous water extracts of the aerial parts of T. tuberculata at different concentrations was assessed based on the germination and initial growth of barnyardgrass
(E. crusgalli (L.) Beauv.), rice (O. sativa L.) and weedy rice (O. sativa L.) to investigate its extensibility and possibility for use as natural weed inhibitors.
The results revealed that the application of both T. tuberculata leaf and stem aqueous extracts significantly reduced percentage of germination,
as well as radicle and hypocotyl lengths of the tested plants.
The reductions increased with the increase in extract concentration when compared to the control (Fig. 1).