Biostatic Activity of Eusiderin I From Eusideroxylon Zwagery Against Sclerotium Rolfsii

241 (4,99) and 273 (4,83) and the infra-red spectra of this compound showed the sharp aromatic C-H stretching vibration at 3079 cm-1, aliphatic C-H stretching vibration at 2975 and 2933 cm-1, aromatic C-H bending vibration also shown in finger print 998, 829 and 637 cm-1. These vibration regions also indicate the substituted aromatic system. The sharp aromatic C=C stretching vibration Research on biostatic activity of Eusiderin I from Eusideroxylon zwagery against Sclerotium rolfsii had been carried out. The isolated Eusiderin I was a white crystal with melting point in such 99-100 oC. The UV spectra in CHCl3 showed absorbance at also shown in 1597 and 1508 cm-1. Peak with wave number of 1358-1136 cm-1 was C-O-C groups. The biostatic activity test of Eusiderin I from Bulian wood (Eusideroxylon zwagery) to phatogen fungi of Sclerotium rolfsii showed that with three different concentrations (3, 4 and 5 ppm), Eusiderin I was a potent biofungicide because it had a strong activity in inhibiting the Sclerotium rolfsii growth. The 5 days incubation test result showed that 4 ppm Eusiderin I could inhibit the Sclerotium rolfsii colony growth. The 5 ppm Eusiderin I gave the most effective inhibition precentage because it could inhibit the Sclerotium rolfsii colony growth (= 49.5%).