Previous work on sunnhemp demonstrated
allelopathic properties of ground
dried residues and aqueous leaf extracts on
certain weeds.Aqueous leaf extracts and residues of
sunnhemp were found to suppress growth of
wheat (Triticum aestivum), goosegrass (Eleusine
indica), livid amaranth (Amaranthus
lividus), and bell pepper (Capsicum annum)
but had little effect on tomato.