Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Gradual Emergence of East African Cassava Mosaic Cameroon Virus in Cassava Farms in Côte d’Ivoire

Békanvié Serge Marie KOUAKOU
* ORCID logo ,
Aya Ange Naté Yoboué
ORCID logo ,
Justin S. PITA
* ,
J. Musembi Mutuku
,
Daniel H. Otron
,
Nazaire K. Kouassi
,
Kan Modeste Kouassi
ORCID logo ,
Linda Patricia L. Vanié-Léabo
,
Cyrielle Ndougonna
,
Michel Zouzou
,
Fatogoma Sorho
ORCID logo
Version 1 : Received: 12 January 2024 / Approved: 15 January 2024 / Online: 15 January 2024 (10:27:23 CET)

A peer-reviewed article of this Preprint also exists.

Kouakou, B.S.M.; Yoboué, A.A.N.; Pita, J.S.; Mutuku, J.M.; Otron, D.H.; Kouassi, N.K.; Kouassi, K.M.; Vanié-Léabo, L.P.L.; Ndougonna, C.; Zouzou, M.; Sorho, F. Gradual Emergence of East African cassava mosaic Cameroon virus in Cassava Farms in Côte d’Ivoire. Agronomy 2024, 14, 418. Kouakou, B.S.M.; Yoboué, A.A.N.; Pita, J.S.; Mutuku, J.M.; Otron, D.H.; Kouassi, N.K.; Kouassi, K.M.; Vanié-Léabo, L.P.L.; Ndougonna, C.; Zouzou, M.; Sorho, F. Gradual Emergence of East African cassava mosaic Cameroon virus in Cassava Farms in Côte d’Ivoire. Agronomy 2024, 14, 418.

Abstract

Cassava mosaic disease (CMD) and cassava brown streak disease (CBSD) are endemic threats to cassava production. To fill the existing gaps in the understanding of the epidemiology of these diseases in Côte d’Ivoire, nationwide field surveys were conducted in 2016, 2017 and 2020. The leaf samples collected were analysed by PCR. CBSD was not detected in all fields visited. However, an increase of CMD incidence was observed from 45.95% in 2016 to 51.37% in 2020 while CMD severity remained moderate over the years with a mean value of 2.29. Low whiteflies number was observed in field and decreasing over the years. Molecular analysis allowed detection of East African cassava mosaic Cameroon virus (EACMCMV) in single as well as in mixed infection with African cassava mosaic virus (ACMV). Single EACMCMV infection, which was detected only in three agroecological zones of the eastern Côte d’Ivoire in 2016, spread throughout the country in 2017 and became more widespread in 2020 with a preponderance in the central and southern zones, whereas the ACMV+EACMCMV coinfection has spread to the entire zones studied. Knowing the dynamics of the evolution of these viruses across the country, better disease management strategies could be adopted to control the disease.

Keywords

Epidemiology; CMD; begomoviruses; Côte d’Ivoire

Subject

Biology and Life Sciences, Agricultural Science and Agronomy

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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