Allelopathic activity of aqueous extracts of Richardia brasiliensis Gomes on germination and initial growth of common bean and soybean
ABSTRACT: Weeds are major constraints on crop productivity not only because of competition for resources but also because they release allelopathic compounds. Richardia brasiliensis Gomes (Rubiaceae) is widely distributed in agricultural systems and may affect neighboring crops by producing bioactive secondary metaboli...