This study aimed to assess the phytosociology of weeds as a function different crop management technology levels in cassava production. Field experiments were conducted Santa Maria (29°41′03″ S; 53°48′25″ W) and Itaqui (lat. 29°07′31″ long. 56°33′11″ W), Rio Grande do Sul, Brazil. Treatments consisted three levels: low (postemergence weeding without basal dressing); medium (weeding performed at...