Macrophomina phaseolina is a soilborne pathogen that causes the charcoal rot in a wide range of crops including soybean, corn, and common bean. The most common symptoms are the sloughing of cortical tissues from the lower stem and taproot and the speckled dark appearance of the infected tissues caused by large numbers of microesclerotia formed in vascular and cortical tissues. Severe infections result in yellowing and death of the leaves, which remain attached to the plant. The disease is favored under conditions of high temperature (25–35°C) and low soil moisture. Since there are no commercially resistant soybean cultivars, disease management is based on cultural practices (soil fertilization, crop rotation, and irrigation).
Prof. Valdir Lourenço JúniorFaculdade Integrado de Campo Mourão, Câmpus da Faculdade Integrado de Campo Mourão, Rodovia BR158 Km207, S/N, Campo Mourão, Paraná State, CEP 87300-970, BrazilEmail: firstname.lastname@example.org
APS publication number: IW000115
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