Doungous Oumar, Masky Boutou, Levai Dopgima L, Bahoya Joseph A L, Minyaka Emile, Mavoungou Jacques F, Mutuku J Musembi, Pita Justin S
The Central and est frican irus pidemiology (WAVE), Biotechnology Laboratory, Ekona Regional Research Centre, Institute of Agricultural Research for Development, PMB 25, Buea, Cameroon.
Institut Universitaire de Technologie/Faculté des Sciences, Université de Douala, BP 24157, Douala, Cameroon.
Crop Prot. 2022 Aug;158:106017. doi: 10.1016/j.cropro.2022.106017.
Cassava plays a key role in the food security and economy of Cameroon, but its production is constrained by cassava mosaic disease (CMD). However, comprehensive surveys of CMD in Cameroon have been lacking. This study aimed at evaluating the current status of CMD and its whitefly vector. Field surveys were conducted in 2020 using a sampling, diagnostics and data storage protocol that has been harmonized across 10 West and Central African countries for ease of comparison. Thirty plants per field were assessed for CMD severity, whitefly abundance and source of infection. Surveys were conducted in 343 fields and confirmed the presence of CMD in all 10 regions of Cameroon. Among the 10,057 assessed plants, 33.07% were deemed healthy (asymptomatic). At the field level, only 6.7% fields were found to be healthy. The mean CMD incidence across the country was 66.93%, and the mean severity score was 2.28. The main mode of infection was likely through contaminated cuttings. The mean whitefly count per plant was 5.78. This study is the first countrywide survey of CMD in Cameroon and provides insights that can be useful for improving the country's CMD intervention and management strategies.
木薯在喀麦隆的粮食安全和经济中发挥着关键作用，但其产量受到木薯花叶病（CMD）的制约。然而，喀麦隆一直缺乏对CMD的全面调查。本研究旨在评估CMD及其粉虱传播媒介的现状。2020年进行了实地调查，采用了一种采样、诊断和数据存储协议，该协议已在10个西部和中部非洲国家进行了统一，以便于比较。每个田地评估30株植物的CMD严重程度、粉虱数量和感染源。在343个田地进行了调查，证实喀麦隆所有10个地区都存在CMD。在10057株被评估的植物中，33.07%被认为是健康的（无症状）。在田地层面，仅发现6.7%的田地是健康的。全国CMD的平均发病率为66.93%，平均严重程度评分为2.28。主要感染方式可能是通过受污染的插条。每株植物的粉虱平均数量为5.78。本研究是喀麦隆首次全国范围的CMD调查，并提供了有助于改进该国CMD干预和管理策略的见解。
