Peanut is an economical crop of global importance and grown widely in both tropics and subtropics. Currently, China is the largest peanut production, consumption and trade countries around the world. In August 2014, light-brown foliar spots with dark brown, irregular borders were found on peanut (Yuhua 22) at Xinyang in Henan province, China. Symptomatic leaf samples were collected, and surface-sterilized (75% ethanol, 30 s; 3% NaClO, 2 min), rinsed in sterile water for three times, air-dried, plated on potato dextrose agar (PDA) medium, and incubated at 25°C under a 12-h dark/light cycle. Colonies on PDA were initially gray, fluffy mycelium with unevenly distributed mycelial pellets, then becoming dark gray with age. Conidia were oblong, slightly curved, and light-brown with 6 to 10 septa. Conidial sizes (length × width) were 57.5 to 144.7×8.4 to 21.4 (average 102.0×13.8) μm. Pathogenicity tests were conducted with 6-week-old peanut plants. Ten 16×12-cm pots with six plants per pot were inoculated onto t...