Two new species of Diaporthe (Diaporthaceae, Diaporthales) associated with Camellia oleifera leaf spot disease in Hainan Province, China

Tea-oil tree ( Camellia oleifera Abel.) is an important edible oil woody plant with a planting area over 3,800,000 hectares in southern China. Species of Diaporthe inhabit a wide range of plant hosts as plant pathogens, endophytes and saprobes. Here, we conducted an extensive field survey in Hainan Province to identify and characterise Diaporthe species associated with tea-oil leaf spots. As a result, eight isolates of Diaporthe were obtained from symptomatic C. oleifera leaves. These isolates were studied, based on morphological and phylogenetic analyses of partial ITS, cal , his3 , tef1 and tub2 gene regions. Two new Diaporthe species ( D. hainanensis and D. pseudofoliicola ) were proposed and described herein.