The identification on pathogen of barbadosnut leaf blight

A new leaf disease named as leaf blight of barbadosnut(Jatropha curcas),was first found in 2009 in Guizhou Province of China.The disease mainly infected leaves.The spots on diseased leaves were initially oval to irregular,then the spots gradually expanded and finally coalesced to form large leaf blight spots,and the seriously infected leaves easily defoliated earlier.Thirteen isolates were cultured from 16 leaf blight samples of barbadosnut collected from Luodian Plantation in Guizhou Province.The strain PE06 was investigated to be the pathogen based on pathogenic test and identified as Pestalotiopsis microspora according to the pathogen's morphology and rDNA ITS sequence analysis.This is the first report of leaf blight of barbadosnut.