Abstract
In this brief, we report the observation of downy mildew caused by Peronospora chenopodii-ambrosioidis on epazote (Dysphania ambrosioides) in North Carolina, U.S.A. We performed morphological characterization of the sporangia and sporangiophores for identification. We also confirmed the identity of the pathogen by performing an alignment and generating a maximum likelihood phylogeny of the concatenated internal transcribed spacer region and cytochrome c oxidase subunit I sequences.
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