First report of sour rot caused by Geotrichum citri-aurantii on key lime (Citrus aurantifolia) in Colima State, Mexico.
During 2005-07, three hundred fruits of key lime (C. aurantiifolia) in Colima, Mexico, were analysed for the presence of sour rot. Symptoms observed on approximately 40% of the fruits were wounds with a sour, fermented smell, with 30% of the softened area covered with white mycelium. A Geotrichum sp. was isolated on potato dextrose agar. Based on morphological criteria and sequencing the internal transcribed spacer (ITS1-5.8s-ITS2) region of ribosomal DNA (GenBank accession no. EU131181), the fungus was identified as G. citri-aurantii [G. candidum]. This is thought to be the first report of G. citri-aurantii causing sour rot on key lime in Colima.