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Articles by Paco Sereme
Total Records ( 3 ) for Paco Sereme
  Elisabeth Pawinde Zida , Paco Sereme , Vibeke Leth and Philippe Sankara
  Antifungal activity against several fungi infecting sorghum and pearl millet seeds was investigated in aqueous extracts of Acacia gourmaensis (bark) and Eclipta alba (whole plant). The effect of plant extracts in the management of the fungi Fusarium moniliforme, Curvularia lunata, Phoma sorghina, Colletotrichum graminicola and Exserohilum rostratum was assessed using the following parameters: post-treatment seed infection rate, emergence, mortality and vigour of seedlings and grain yield. Both plant extracts were efficient in controlling P. sorghina, F. moniliforme and C. lunata in pearl millet seeds where infections were reduced by 56-86%. In sorghum seeds, both extracts also reduced P. sorghina infections by 27-72% but only extracts from A. gourmaensis controlled C. graminicola with 69% decrease in seed infection. In addition to promoting seed health, all plants extracts favoured seedling emergence, especially in sorghum where proportions of emerged seeds (70-80%) were significantly higher than that of non-treated seeds (66%). Higher seedling vigour was also induced upon seed treatments in either sorghum (7.1-8.3) or pearl millet (7.4-8.4) compared to non-treated seeds (4.3 and 6.3, respectively). The overall beneficial effects of seed treatments with plant extracts resulted in the increase in grain yield. Treatment of the seeds with extracts from E. alba led to the highest yields in both sorghum (2.5 vs. 1.5 t ha-1 for non-treated seeds) and pearl millet (1.6 vs. 1.3 t ha-1). Altogether, plant extracts from A. gourmaensis and E. alba showed fungicidal activities and may be used for controlling major sorghum and pearl millet seed-borne fungi.
  Elisabeth Pawinde Zida , Paco Sereme , Vibeke Leth and Philippe Sankara
  Bonzi Schemaeza , Irenee Somda , Paco Sereme , Toudou Adam and R. Adele Ouedraogo
  The effects of temperatures 22, 28, 32, 36 and 40°C and those of pH 5, 6.5 and 6 were evaluated on 11 isolates of P. sorghina on malt agar medium. The optimal mycelium growth of the most isolates is noted at 28°C. At 32°C, we have recorded a significant reduction of mycelium growth of all the isolates tested when compared with the control at 22°C. At this same temperature, P. sorghina isolates can be group on sensitive isolates, on moderately isolates and on resistant isolates to temperature. The mycelium growth of all the isolates is inhibited at 36°C. On the other hand, the temperature of 40°C kills the mycelium of all the isolates of P. sorghina. The results of our work also show that, least variation of pH (6.5-6) significantly reduced the mycelium growth of P. sorghina isolates at 22 and 28°C. At pH 5 most of the isolates tested are well adapted and the mycelium growth is more important when compare with that at pH 6.
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