Evaluation of Yield Losses Caused by Cowpea Aphid-borne mosaic virus (CABMV) in 21 Cowpea (Vigna unguiculata (L.) Walp.) Varieties in Burkina Faso

Abstract

02/08 Fax : (226) 25 31 92 75 A B S T R A C T Cowpea (Vigna unguiculata (L.) Walp.) is one the main leguminous crop plants world wide, particularly in sub-Saharan Africa where the rainfall is low and often unevenly distributed. However, its production is limited by insect attacks and numerous diseases including those caused by viruses. In Burkina Faso, the Cowpea Aphid-Borne Mosaic Virus (CABMV) is one of the viruses capable of causing 7-60% of yield losses. The aim of this study is to assess the susceptibility of 21 cowpea varieties against CABMV and to also assess the yield losses caused by this virus on each of the varieties. In this context trial was conducted on INERA research stations at Kamboinsé and Farako-Bâ in 2012 and 2013. Twenty one varieties were used for this study. The experimental design used is a split-plot with 4 repetitions for which the first 2 repetitions were inoculated with the CABMV. Symptoms caused by the CABMV on the 21 varieties of cowpea were of a great diversity. The assessment of the virus in infected plant samples from these varieties by ELISA test allowed detecting the mosaic virus in all samples that presented mosaic symptoms. The number of flowers and pods strongly varied depending to the type of plant (inoculated or non-inoculated plant) and the variety. Yields from the different varieties, comprised between 187 and 6250 kg haG 1 , were influenced by the site, the year, the variety and the type of plant. Yields losses were ranged from 3-64% depending to the variety.

Impact of <i>Cowpea mottle virus</i> on the Growth and Yield of Bambara Groundnut (<i>Vigna subterranean</i> (L.) Verdc.)

“…The reduction in the average number of pod per plant which varied between 22.8% and 78.9% is in agreement with results (70.42%) found in CPMoV-infected cowpea [16]. The effect of virus infection on the average number of flowers was also similar to the impact of Cowpea aphid-borne mosaic virus (CABMV) on cowpea [17]. In both virus/host interactions, some plant genotypes were more affected than others and no significant effect of the virus infection was found in some cases.…”

Impact of Rootstock and Season on Red Blotch Disease Expression in Cabernet Sauvignon (V. vinifera)

“…Plant-pathogen interactions can vary depending on the genetic makeup of the plant [ 33 , 34 , 35 ]. Rootstock 110R has high drought tolerance and is a moderately high vigor rootstock; whereas 420A has less drought tolerant and induces lower vigor in the scion in comparison.…”

“…A plant’s genetic material may influence susceptibility to viral infections [ 33 , 34 , 35 ]. Additionally, rootstocks can impact grapevine physiology and impact the overall composition of a grape berry.…”

Performance and Farmers Participatory Selection of Cowpea Varieties in Southern Ethiopia

“…It is also widely cultivated by poor farmers in developing countries with over 80% of its production coming from tropical Africa (Gbaguidi et al, 2015). According to Néya et al (2015) up to 200 million people in tropical Africa use cowpea.…”