-Because of its intrinsic characteristics, sicklepod (Senna obtusifolia) has gained importance in sugarcane, especially where there is a predominance of straw after mechanical harvest. The objective of this study was to evaluate the efficacy of preemergence herbicides used in sugarcane to control sicklepod in different soil textures and application timings. Two experiments were carried out for each application season (dry and wet), and one experiment for each soil textural class (clay and sandy clay loam), totaling four experiments. The treatments consisted in 17 herbicides in the wet season and 11 herbicides in the dry season (all herbicides were applied at 50 and 100% of the recommended dose) and a check without application for each season and soil, and the design was completely randomized. Soil texture and application timing have altered the herbicide efficacy. For the wet season, initially, all herbicides, except trifluralin and smetolachlor, resulted in satisfactory control of sicklepod. Tebuthiuron was the herbicide that provided the longest period of residual control. For the dry season, amicarbazone, flumioxazin, hexazinone, imazapic, [diuron + hexazinone] F1 and isoxaflutole were efficient in both soils, but only in initial evaluations; [diuron + hexazinone] F1 and amicarbazone were the herbicides that provided the longest period of residual control. Keywords: residual control; preemergence; sicklepod; herbicides Resumo -Devido às suas características intrínsecas, o fedegoso (Senna obtusifolia) tem ganhado importância em canaviais, principalmente onde há predomínio de palhada após a colheita mecânica. O objetivo deste trabalho foi avaliar a eficácia de herbicidas pré-emergentes utilizados na cultura da cana-de-açúcar no controle de fedegoso em solos de diferentes texturas e épocas de aplicação. Foram realizados dois experimentos para cada época de aplicação (seca e úmida), sendo um para cada classe textural de solo (muito-argiloso e franco-argilo-arenoso), totalizando quatro experimentos. Os tratamentos foram constituídos por 17 herbicidas na época úmida e 11 herbicidas na época seca (todos os herbicidas foram aplicados em 50 e 100% da dose recomendada), além da testemunha sem aplicação para cada época e solo, sendo o delineamento inteiramente ao acaso. O