Thielaviopsis sp. Anamorph Ceratocystis sp. is an important agricultural pathogen
fungal genus. Cultural characteristics showed two different groups recorded as brown and black
colonies on the surface of the artificial media. Conidial structures showed morphology typical
of Thielaviopsis. DNA sequences were generated for Internal Transcribed Spacer regions (ITS1
and ITS2). Morphology and molecular analyses showed the causal agents of rotten Salak were
Thielaviopsis paradoxa and T. ethacetica. The descriptions of the fungi were illustrated in this
study.