resistance/tolerance to the sorghum midge for their agro morphological characteristics and the taste of their grains in Centre-West and East of Burkina Faso

Impact de la cécidomyie sur les lignées du sorgho au Burkina Faso

Abstract

The sorghum midge, Stenodiplosis sorghicola Coquillett, 1899 (Diptera: Cecidomyiidae), causes  significant damage in the west-central and eastern regions of Burkina Faso. The study was conducted during  the 2019-2020 rainy season to evaluate the tolerance of advanced sorghum lines to the target insect. five 5  sorghum lines were tested: 3 sorghum midge resistant lines, BF 94-5/30k-2k-1k-1F, BF 94-6/46k-1F-1k

1F and CCAL1/1-1-3-1-1-1F-1k-1F and 2 Striga tolerant lines, F2-20 and Striga ; BF 85-2/12-1-1. These  lines were compared to a local control of each testing site. The experimental design was a scattered block  design in a farming environment. In two regions, three villages and three producers were selected. Each  experimental plot was 630 m2 in size. Entomological observations were made on 20 randomly selected  sorghum plants every 7 days from the 15th day after sowing (DAS) until the 120th DAS. At harvest, taste  tests were performed. The line BF 85-2/12-1-1 and the line F2-20 were the most susceptible to S.  sorghicola. The lines significantly influenced, depending on their status, yield components and yield. The  advanced line BF 94-5/30k-2k-1k-1F) with 6.3 t/ha provided the highest average yield and was the most  interesting line in taste tests. It is followed by line F2-20 with (6.17 t/ha.