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The selective medium RB (39 g/L of potato-dextrose agar, 100 mg/L of rifampicin, 224 mg a.i./L of metalaxyl, and 1.0 ml/L of nonoxynol [Tergitol NP-10]) was compared with MP and MSK, two selective media commonly used to enumerate sclerotia of Macrophomina phaseolina. The comparison was made with 20 field soils collected from Arkansas that were naturally infested with M. phaseolina and with a sterilized soil artificially infested with various levels of sclerotia (...)
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G. L. Cloud (1991) studied this question.
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