Bioactivity assay of compound (hexa-tetra contane) From Callyspongia pseudoreticulata As Antibacterial Agent Of “Penyakit Layu” (Ralstonia solanacearum) In Potato Plant

Sponge is one of the marine biota that known have a high bioactivity potential and contain secondary metabolites that can be used as antibiotic and medicinal materials. The aim of this research was to bioactivity assay of hexa-tetra contane compound contained in Callyspongia pseudoreticulata. Antibacterial tested has been carried out for Ralstonia solanacearum in potato plant. The results showed that 400 mg/ml of compound has the best inhibitory diameter of “Penyakit Layu” bacterial (Ralstonia solanacearum) was 21.33 mm and significantly different to other concentration