Identification of Fungal Pathogen of Stem Rot of Bayberry (Myrica rubra) and Screening of Fungicides

Stem rot was a severe diseases of bayberry(Myrica rubra) in Hunan Province,infected in the branch and stem,and caused them rot.It was identified that Cytospora leucostoma was the pathogen of bayberry stem rot.The results in vitro of fungicide screening studies were as follows: thiophanate-methyl thiram,thiophanate-methyl,carbendazim,tuzet,tanbiling and bordeaux mixtures completely inhibited mycelial growth and conidial spore germination of C.leucostoma;Xiangyanzhibingling and hongsha caused complete inhibition mycelial growth,but could not inhibit spore germination;Fosetyl-aluminium.maneozeb,dacoden and lime sulphur could inhibit spore germination,but could not inhibit mycelial growth.