First report of leaf spot of maize (Zea mays) caused by Curvularia geniculata in China.
In September of 2015, a leaf spot disease was observed on maize (Zea mays) cv. Yundan 10 in Baoxiong farm of QuJing City, Yunnan, China. Early symptoms on leaves were small (1-2 mm) water-soaked and translucent circular to oval spots that later enlarged, with the centres turning pale. Spots were elliptical with a chlorotic halo. Five hectares of maize were severely affected by the disease. Lesions appeared on 3-4 leaves per plant. The causal pathogen was isolated and identified as Cochliobolus geniculatus based on morphological, molecular and pathogenicity analyses. The consensus sequence was submitted to GenBank (accession no. MH395931.1). This is thought to be the first record of C. geniculatus on maize in China.