To confirm Koch’s postulates, the standard criteria to determine the agent causing a disease , we reisolated fungi from stem tissue at least 2-cm above the point of inoculation in harvested plants, amplified using primer pairs ITS1F/ITS4 for the ITS and EF1-728F/986R for alpha-elongation factor-1 . They were sequenced using the protocol described by Schultheis et …
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