PETRI-DISH experiments were applied to investigate the
potential allelopathic effects of cold and hot aqueous extracts of
Rosmarinus officinalis and Salvia officinalis on germination
percentage, relative germination percentage, and inhibition percentage
as well as plumule and radicle lengths of Panicum turgidum. The
results indicate that the degree of inhibition of seed germination and
the growth of the recipient species was largely dependent on the
concentration of the extracts of both donor species. The effect was
statistically significant at p ≤ 0.05 for most treatments. The p resent
the study recommends the use of the two donor species for the biocontrol
of weeds like Panicum turgidum.