Abstract
The effects of soil solarization combined or not with millet residues or paunch contents amendments, on the survival ofMacrophomina phaseolina (Tassi) Goid. and development of charcoal rot of cowpea (Vigna unguiculata), were assessed in a naturally infested soil. Solarization increased the soil temperature to 50°C for at least 4 h per day during June, leading to a significant reduction (44%) in soil inoculum ofM. phaseolina. Paunch contents or millet residues amendment (3 t ha−1) caused 16% or 35% reduction of initial inoculum density, respectively. The combination of paunch contents or millet residues amendments followed by solarization, resulted in the strongest effects on inoculum density, with reductions of 46% or 66%, respectively. The reduction in disease severity, as expressed by the area under the disease progress curve, was 78% or 96% for the combination of millet residues or paunch contents amendments and solarization, respectively. The stronger effect of the treatments on disease severity than on inoculum density may be explained by a weakening effect caused by the treatments on the remaining inoculum. Our results suggest that in the Sahelian zone the combination of solarization and organic amendment can be a credible alternative to pesticides for managing charcoal rot disease and improving cowpea yield in fields with heavy infestations withM. phaseolina.
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Ndiaye, M., Termorshuizen, A.J. & Van Bruggen, A.H.C. Combined effects of solarization and organic amendment on charcoal rot caused byMacrophomina phaseolina in the sahel. Phytoparasitica 35, 392–400 (2007). https://doi.org/10.1007/BF02980703
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DOI: https://doi.org/10.1007/BF02980703