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Propagule Densities of Macrophomina phaseolina in Soybean Tissue and Soil as Affected by Tillage, Cover Crop, and Herbicide

A. Mengistu, K. N. Reddy, R. M. Zablotowicz, and A. J. Wrather

January 2009


All current commercial soybean cultivars are susceptible to charcoal rot, caused by Macrophomina phaseolina. Management efforts through non-genetic means have been ineffective, but the combined effects of tillage, cover crop and herbicide use, and their roles in the population dynamics of this fungus have not been fully investigated. Our objective was to determine the effects of tillage, cover crops, and herbicides on the population dynamics of M. phaseolina in stem and root tissue as well as in soil at planting and at harvest.


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