This study dealt with the cooperative farmers knowledge on the utilization of Tropical Manihot Selections (TMS of the CMP) in Southern Nigeria. Two research questions and one research hypothesis guided the study. Three states one from each geopolitical zone in Southern Nigeria were purposively sampled and from them, 360 accessible cooperative farmers (males and females) were randomly sampled for the study. The study was a survey and a 14-item structured questionnaire valiadated by 13 experts in different areas of cassava development was used for data collection. The internal consistency was establish using Cronbach Alpha. Three hundred and sixty copies of the instrument were administered on the respondents out of which 331 were completed and returned. Data were analysed using percentage, mean, analysis of variance (ANOVA) and scheffe test. The findings revealed that farmers have a good knowledge on TMS now after the initial negative attitude and response to the adotpion of TMS now than when previously introduced. ANOVA result revealed significant difference in the mean responses of cooperative farmers regarding their knowledge on TMS in Ogun, Delta and Enugu States in Southern Nigeria.
Based on the findings, recommendations made include the need for regular radio and television programmes in local dialects to dissiminate information on TMS to farmers, regular publications in local languages among others.