_____________________________________________________________________________________________________ *Corresponding author: E-mail: josianefomekong@yahoo.fr; Annual Research & Review in Biology 30(3): 1-8, 2018; Article no.ARRB.45119 ISSN: 2347-565X, NLM ID: 101632869 Field Evaluation of Some Cassava Cultivars against the African Cassava Mosaic Disease in the Humid Forests of Cameroon A. Mogo 1 , J. Fomekong Nopogwo 2,3* , E. L. Ngonkeu Mangaptche 2,3 , R. Ghogomu Tamouh 1 , E. Temgoua 1 , Fotso 4 , Noé Woin 3 , J. Djeugap Fovo 1 , M. Yemefack 3 , M. Tene Thierry 5 , D. Fotio 3 and Hanna Rachid 5 1 University of Dschang, Cameroon. 2 University of Yaoundé I, BP 8 12 Yaoundé, Cameroon. 3 Institute of Agricultural Research for Development, IRAD, BP 2067, Cameroon. 4 University of Bamenda, Cameroon. 5 International Institute of Tropical Agriculture, Nigeria. Authors’ contributions This work was carried out in collaboration between all authors. All authors read and approved the final manuscript. Article Information DOI: 10.9734/ARRB/2018/v30i330015 Editor(s): (1) Dr. Rajeev Kumar, Department of Veterinary Public Health & Epidemiology, Vanbandhu College of Veterinary Science & A. H, Navsari Agricultural University, India. (2) Dr. George Perry, Dean and Professor of Biology, University of Texas at San Antonio, USA. Reviewers: (1) Alex Abaca, National Crops Resources Research Institute (NaCRRI), Uganda. (2) Esraa Ashraf Ahmed ElHawary, Ain Shams University, Egypt. Complete Peer review History: http://www.sdiarticle3.com/review-history/45119 Received 26 August 2018 Accepted 21 November 2018 Published 15 February 2019 ABSTRACT There is a considerable deficit in the annual production of cassava in Cameroon of about 31 million tons, and this has been mainly due to constraints related to pest attacks and most especially diseases like the African Cassava Mosaic Disease (ACMD). This study was therefore undertaken on three sites in the locality of Bityili (South Region of Cameroon), to determine amongst improved and local cassava cultivars those that provide resistance to the development of the ACMD. The severity and incidence of this disease was evaluated and its impact on cassava yield. In each site, cassava was grown in a randomized complete block design. The local cultivars (Ekobele and Ngon kribi) showed higher severity (76-100%) and incidence of ACMD compared to the improved cultivars (TMS 92/0326 and TMS 96/1414) of 0-25% and 0-10%, respectively. Strong inverse correlations Original Research Article