_____________________________________________________________________________________________________ *Corresponding author: E-mail: bunmialuko2010@gmail.com; Journal of Experimental Agriculture International 42(12): 39-47, 2020; Article no.JEAI.60028 ISSN: 2457-0591 (Past name: American Journal of Experimental Agriculture, Past ISSN: 2231-0606) Spatial and Temporal Effects of Kenaf (Hibiscus cannabinus L.) Cultivation on Weed Dynamics in Southern Agro-ecologies of Nigeria O. A. Aluko 1* , T. O. Oyebola 2 , J. O. Amosun 1 , A. Adewunmi 1 and T. T. Oluwayemi 3 1 Institute of Agricultural Research and Training, Obafemi Awolowo University, Moor Plantation, P.M.B. 5029, Ibadan, Nigeria. 2 Forestry Research Institute of Nigeria, Jericho, Ibadan, Nigeria. 3 Federal College of Agriculture, Moor Plantation, Ibadan, Nigeria. Authors’ contributions This work was carried out in collaboration among all authors. All authors read and approved the final manuscript. Article Information DOI: 10.9734/JEAI/2020/v42i1230629 Editor(s): (1) Dr. Rusu Teodor, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, Romania. (2) Dr. Daniele De Wrachien, University of Milan, Italy. Reviewers: (1) Yibeltal Yihunie Mekonnen, Arba Minch University, Ethiopia. (2) Nurfarah Aini, Universiti Sains Malaysia (USM), Malaysia. Complete Peer review History: http://www.sdiarticle4.com/review-history/60028 Received 01 July 2020 Accepted 03 September 2020 Published 31 December 2020 ABSTRACT Weed spectrum in Kenaf fields revealed the heterogeneous flora richness of agro-ecologies and potential weed challenges. A study was conducted in the Institute of Agricultural Research and Training (IAR&T), Obafemi Awolowo University Ibadan and other substations (Ilora, Ikenne and Kishi). The effects of varied kenaf planting dates, genotypes and locations on weed dynamics and potential weed problem was investigated. Five Kenaf genotypes (Cuba 108, Ifeken DI 400, Ifeken 100, Ifeken 400 and Tianung 2) were planted. It was a 3 x 4 x 5 factorial experiment arranged in Randomized complete block design (RCBD) with three replicates. Forty five (45) weed species were identified across seventeen (17) plant families. Weed morphology comprised of broad-leaf weeds (71.11%), grass weeds (17.78%), sedge (6.67%) and spiderwort (4.44%). Abundance of broad-leaf weeds (71.11%) mostly annual, reflected regular weed control from frequent cropping patterns and agro-ecological variations. Panicum maximum, Ageratum conyzoides, Original Research Article