In October 2022, common Asian cowpea (<i>Vigna nakashimae</i>) powdery mildew disease was investigated at Yesan-gun, Chungcheongnam-do, Korea (36°40’12.7"N,126°51’36.4"E). The mainly occurred on the front of leaves, and weak back side leaf. chasmothecia identified Analysis internal transcribed spacer rDNA sequence 28S large subunit sequence, along with morphological characteristics ...