Plants of Cotinus coggygria were observed with powdery mildew symptoms during field surveys in Abbottabad, Khyber Pakhtunkhwa (KP), Pakistan in 2020. Morpho-anatomical and molecular phylogenetic analyses were used to identify the powdery mildew species parasitizing these plants as Erysiphe verniciferae. Pathogenicity was confirmed on healthy leaves of C. coggygria in a greenhouse at 25℃ with 75-80 humidity at 7-10 days after inoculation, when white powdery mildew colonies appeared. This is the first report of powdery mildew caused by E. verniciferae on C. coggygria in Pakistan.
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