IDENTIFIKASI DAN VIRULENSI Fusarium oxysporum f.sp. cubense RAS 4 = IDENTIFICATION AND VIRULENCE OF Fusarium oxysporumf.sp. cubense RACE 4

The aim of this study was to identify and to detect the virulence of Fusarium oxysporumfsp. cubense (Foe) race 4. The isolates consisted of BNT-2, KD-I, U-8, BK, A-2, and A-I3. Monospore isolation was done to obtain stable isolates. The detection and characteristics of isolates were observed on Komada medium. The diameter of colony and color was observedfrom underside of culture inpetridish, while the shape of colony was observedfrom the upperside. Virulencetest was conducted on Cavendish cultivar seedlings. Banana seedlings were inoculated with Foe cultured on rice medium (20 g/kg soil). The result indicated that A-I3, U~8,BNT-2, and BK, were very virulent isolate