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Quantitative Assay of Macrophomina phaseoli from Soil. Arthur H. McCain, Extension Plant Pathologist, University of California, Berkeley 94720; Richard S. Smith, Jr., Plant Pathologist, Pacific Southwest Forest and Range Experiment Station, Forest Service, USDA, Berkeley 94701. Phytopathology 62:1098. DOI: 10.1094/Phyto-62-1098.

A new technique for a quantitative assay of Macrophomina phaseoli directly from soil has been developed. It uses both wet sieving and a selective medium.