Abstract:
This study focuses on the search for allelopathic activity of the plant Pergularia tomentosa
L. were harvested in the northern Sahara, eastern Algeria, on the germination of seeds of barley
(Hordeum vulgare L.), (Poaceae). This study allowed demonstrating the inhibitory effect on the
germination of barley seeds treated with the aqueous leaf and root extracts of this plant in the
Sahara. The pure and diluted to 50% aqueous extracts showed an exceptional ability to inhibit the
germination of barley seeds where a maximum rate of 100% inhibition is achieved for low back
concentrations, an inhibitory effect on the germination part there observed. In addition, it is found
that the root extract seems more phytotoxic than the leaf extract of P. tomentosa L.; Growth
abnormalities are still observed in the batches treated with extracts of this plant, also.
