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Articles by Oumar Traore
Total Records ( 2 ) for Oumar Traore
  S.A.H. Omer , G. Konate , Oumar Traore , Ouola Traore and P. Menozzi
  The bollworm Helicoverpa armigera is cotton plant main pest in most parts of the world. The mechanisms of the resistance of the bollworm to the pyrethroid deltamethrin were studied by comparing field strains to the reference and susceptible strain (BK77). Resistance to deltamethrin was studied using bio-assays. Results showed that the field collected strains had susceptibility 11 to 43 fold lower than that of the susceptible standard strain BK77. Activities of two types of enzymes i.e., oxidases and Glutathione-S-Transferases (GST) were significantly higher in field strains, whereas esterase activities were lower compared to that of standard strain. The increase of oxidases and GST activities and the decrease of esterase activity are at least in part, responsible for the development of resistance of H. armigera to pyrethroids.
  Fidele Tiendrebeogo , V.S. Edgar Traore , Nicolas Barro , Alfred S. Traore , Gnissa Konate and Oumar Traore
  The aetiology of a disease characterized by severe leaf curling and leaf distortion symptoms in peppers was studied in Burkina Faso. Surveys were conducted in fields planted with sweet pepper (Capsicum annuum) and hot pepper (Capsicum frutescens) to collect leaf samples and assess disease incidence. Collected samples were analyzed using biological tests (mechanical inoculation and whitefly transmission), triple-antibody-sandwich- enzyme linked-immunosorbent assay (TAS-ELISA), Polymerase Chain Reaction (PCR) and sequence analysis. Mechanical inoculation tests were negative while transmission by the whitefly Bemisia tabaci led to infection rates of more than 80%. TAS-ELISA and PCR tests indicated that symptoms observed were associated with begomovirus infections. Involved virus isolates showed pairwise nucleotide identity of more than 99% with Pepper yellow vein mali virus (PepYVMV) and formed with this virus a distinct clade in phylogenetic analyses. Altogether, these results indicated that PepYVMV was the causal agent of leaf curling symptoms in peppers.
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