Charcoal rot is a disease that has increased in both incidence and severity in Indiana and the upper Midwest region. Management options for reducing the impact of this disease on yield are limited to host resistance as there are no effective fungicides available and crop rotations are pointless due to the wide host range of the pathogen. Efforts to identify resistant varieties have focused almost entirely on germplasm adapted to the southern U.S. (late maturity group III-V). However, research is now in progress to evaluate maturity group I-early III varieties for resistance to charcoal rot. Currently, the standard method for determining field-resistance is based on colonization of roots...
Methods for evaluating soybean varieties for resistance to charcoal rot.
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