Identification of pathogen causing Rhus chinensis anthracnose
Rhus chinensis,also known as Chinese gallnut tree is an important economic tree species in China.In recent years,anthracnose symptoms were found on the branches and rachises of Rhus chinensis at several planting located in Wufeng Tujia Autonomous County,Hubei Province.Initially the brown spots were discovered on the infected tree.As the spots gradually expanded,irregular in shape,multiple spots could be united together into a big one,and the color of the spots gradually turned dark brown to black.Finally,the diseased branches broke off,the leaves and the galls on branches became wilt.Ten isolates were obtained from branches samples and eight of them were identified as Colletotrichum nymphaeae by morphology and multilocus phylogenies from combined datasets of ITS,Tublin,Actin,Gadph,Chs.The assay of Koch's postulates confirmed that C.nym-phaeae was the causal agent of Rhus chinensis anthracnose.To our knowledge,this is the first report of C.nym-phaeae causing Rhus chinensis anthracnose in China.
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